./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:14:36,932 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:14:37,037 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:14:37,044 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:14:37,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:14:37,085 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:14:37,086 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:14:37,086 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:14:37,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:14:37,087 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:14:37,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:14:37,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:14:37,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:14:37,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:14:37,090 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:14:37,091 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:14:37,091 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:14:37,092 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:14:37,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:14:37,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:14:37,093 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:14:37,098 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:14:37,098 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:14:37,099 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:14:37,099 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:14:37,099 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:14:37,100 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:14:37,100 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:14:37,100 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:14:37,101 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:14:37,101 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:14:37,101 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:14:37,106 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:14:37,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:37,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:14:37,107 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:14:37,107 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:14:37,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:14:37,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:14:37,108 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:14:37,108 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:14:37,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:14:37,110 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2024-10-31 22:14:37,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:14:37,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:14:37,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:14:37,513 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:14:37,513 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:14:37,515 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i Unable to find full path for "g++" [2024-10-31 22:14:39,747 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:14:40,011 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:14:40,012 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2024-10-31 22:14:40,026 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/data/b21150140/140b933ee4d143d6bcc87e5fda710def/FLAG504e794cf [2024-10-31 22:14:40,048 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/data/b21150140/140b933ee4d143d6bcc87e5fda710def [2024-10-31 22:14:40,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:14:40,054 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:14:40,056 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:40,060 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:14:40,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:14:40,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d22400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40, skipping insertion in model container [2024-10-31 22:14:40,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,127 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:14:40,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:40,620 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:14:40,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:40,718 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:14:40,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40 WrapperNode [2024-10-31 22:14:40,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:40,720 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:40,721 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:14:40,721 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:14:40,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,750 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,788 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 220 [2024-10-31 22:14:40,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:40,792 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:14:40,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:14:40,797 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:14:40,814 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,819 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,879 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 7, 18]. 67 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 0, 2]. The 11 writes are split as follows [0, 5, 6]. [2024-10-31 22:14:40,880 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,880 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,915 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,921 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,926 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:14:40,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:14:40,934 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:14:40,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:14:40,936 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (1/1) ... [2024-10-31 22:14:40,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:40,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:40,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:14:40,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:14:41,051 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2024-10-31 22:14:41,051 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2024-10-31 22:14:41,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:14:41,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:14:41,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:14:41,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:14:41,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:14:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:14:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:14:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-31 22:14:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:14:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:14:41,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-31 22:14:41,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:14:41,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-31 22:14:41,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-31 22:14:41,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-31 22:14:41,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:14:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:14:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:14:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:14:41,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:14:41,233 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:14:41,236 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:14:41,992 INFO L? ?]: Removed 157 outVars from TransFormulas that were not future-live. [2024-10-31 22:14:41,994 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:14:42,018 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:14:42,020 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:14:42,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:42 BoogieIcfgContainer [2024-10-31 22:14:42,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:14:42,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:14:42,027 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:14:42,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:14:42,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:14:40" (1/3) ... [2024-10-31 22:14:42,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a011f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:42, skipping insertion in model container [2024-10-31 22:14:42,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:40" (2/3) ... [2024-10-31 22:14:42,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a011f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:42, skipping insertion in model container [2024-10-31 22:14:42,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:42" (3/3) ... [2024-10-31 22:14:42,038 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2024-10-31 22:14:42,058 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:14:42,059 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2024-10-31 22:14:42,126 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:14:42,132 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=PETRI_NET, 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;@642febaf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:14:42,132 INFO L334 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2024-10-31 22:14:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 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) [2024-10-31 22:14:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-31 22:14:42,142 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:42,143 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:14:42,144 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:42,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:42,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1044165707, now seen corresponding path program 1 times [2024-10-31 22:14:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:42,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204113634] [2024-10-31 22:14:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:42,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:42,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204113634] [2024-10-31 22:14:42,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204113634] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:42,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:42,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:42,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878282301] [2024-10-31 22:14:42,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:42,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:14:42,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:42,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:14:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:14:42,410 INFO L87 Difference]: Start difference. First operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:42,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:42,447 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2024-10-31 22:14:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:14:42,452 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-31 22:14:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:42,462 INFO L225 Difference]: With dead ends: 147 [2024-10-31 22:14:42,462 INFO L226 Difference]: Without dead ends: 144 [2024-10-31 22:14:42,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:14:42,470 INFO L432 NwaCegarLoop]: 166 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:42,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-31 22:14:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2024-10-31 22:14:42,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.880952380952381) internal successors, (158), 140 states have internal predecessors, (158), 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) [2024-10-31 22:14:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2024-10-31 22:14:42,535 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 6 [2024-10-31 22:14:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:42,536 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2024-10-31 22:14:42,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2024-10-31 22:14:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:14:42,538 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:42,538 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:42,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:14:42,538 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:42,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash 594325856, now seen corresponding path program 1 times [2024-10-31 22:14:42,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:42,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404532071] [2024-10-31 22:14:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:42,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:42,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404532071] [2024-10-31 22:14:42,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404532071] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:42,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:42,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:42,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787651077] [2024-10-31 22:14:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:42,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:42,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:42,717 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:42,814 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2024-10-31 22:14:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:42,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:14:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:42,820 INFO L225 Difference]: With dead ends: 286 [2024-10-31 22:14:42,821 INFO L226 Difference]: Without dead ends: 286 [2024-10-31 22:14:42,821 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 [2024-10-31 22:14:42,826 INFO L432 NwaCegarLoop]: 156 mSDtfsCounter, 158 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:42,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 463 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2024-10-31 22:14:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 146. [2024-10-31 22:14:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 86 states have (on average 1.8604651162790697) internal successors, (160), 142 states have internal predecessors, (160), 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) [2024-10-31 22:14:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 164 transitions. [2024-10-31 22:14:42,849 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 164 transitions. Word has length 8 [2024-10-31 22:14:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:42,850 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 164 transitions. [2024-10-31 22:14:42,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 164 transitions. [2024-10-31 22:14:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:14:42,853 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:42,854 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:42,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:14:42,854 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:42,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 592478814, now seen corresponding path program 1 times [2024-10-31 22:14:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:42,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669528021] [2024-10-31 22:14:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:43,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:43,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669528021] [2024-10-31 22:14:43,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669528021] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:43,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:43,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:43,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267231995] [2024-10-31 22:14:43,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:43,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:43,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:43,063 INFO L87 Difference]: Start difference. First operand 146 states and 164 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:43,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:43,301 INFO L93 Difference]: Finished difference Result 251 states and 282 transitions. [2024-10-31 22:14:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:43,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:14:43,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:43,304 INFO L225 Difference]: With dead ends: 251 [2024-10-31 22:14:43,308 INFO L226 Difference]: Without dead ends: 251 [2024-10-31 22:14:43,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:43,310 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 112 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:43,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 349 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-10-31 22:14:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 198. [2024-10-31 22:14:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 135 states have (on average 1.8592592592592592) internal successors, (251), 192 states have internal predecessors, (251), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:14:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2024-10-31 22:14:43,327 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 8 [2024-10-31 22:14:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:43,327 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2024-10-31 22:14:43,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2024-10-31 22:14:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:14:43,328 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:43,328 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:43,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:14:43,329 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:43,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash 592478813, now seen corresponding path program 1 times [2024-10-31 22:14:43,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961300315] [2024-10-31 22:14:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:43,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:43,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:43,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961300315] [2024-10-31 22:14:43,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961300315] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:43,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:43,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:14:43,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460074228] [2024-10-31 22:14:43,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:43,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:43,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:43,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:43,409 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:43,612 INFO L93 Difference]: Finished difference Result 381 states and 498 transitions. [2024-10-31 22:14:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:43,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:14:43,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:43,616 INFO L225 Difference]: With dead ends: 381 [2024-10-31 22:14:43,616 INFO L226 Difference]: Without dead ends: 381 [2024-10-31 22:14:43,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:43,619 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 142 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:43,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 209 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2024-10-31 22:14:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 280. [2024-10-31 22:14:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2024-10-31 22:14:43,652 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2024-10-31 22:14:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:43,652 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2024-10-31 22:14:43,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2024-10-31 22:14:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:14:43,657 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:43,657 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:43,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:14:43,658 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:43,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash 592478876, now seen corresponding path program 1 times [2024-10-31 22:14:43,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:43,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975254410] [2024-10-31 22:14:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:43,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975254410] [2024-10-31 22:14:43,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975254410] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:43,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:43,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:43,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829631802] [2024-10-31 22:14:43,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:43,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:43,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:43,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:43,816 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:44,020 INFO L93 Difference]: Finished difference Result 336 states and 425 transitions. [2024-10-31 22:14:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:14:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:44,022 INFO L225 Difference]: With dead ends: 336 [2024-10-31 22:14:44,022 INFO L226 Difference]: Without dead ends: 336 [2024-10-31 22:14:44,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:44,023 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 110 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:44,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 350 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-10-31 22:14:44,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 280. [2024-10-31 22:14:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2024-10-31 22:14:44,041 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2024-10-31 22:14:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:44,041 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2024-10-31 22:14:44,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2024-10-31 22:14:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:14:44,042 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:44,042 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:44,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:14:44,043 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:44,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1779058665, now seen corresponding path program 1 times [2024-10-31 22:14:44,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:44,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047309499] [2024-10-31 22:14:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:44,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:44,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:44,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047309499] [2024-10-31 22:14:44,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047309499] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:44,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:44,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:44,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350839764] [2024-10-31 22:14:44,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:44,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:44,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:44,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:44,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:44,100 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:44,122 INFO L93 Difference]: Finished difference Result 380 states and 495 transitions. [2024-10-31 22:14:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:14:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:44,125 INFO L225 Difference]: With dead ends: 380 [2024-10-31 22:14:44,125 INFO L226 Difference]: Without dead ends: 380 [2024-10-31 22:14:44,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:44,131 INFO L432 NwaCegarLoop]: 159 mSDtfsCounter, 130 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:44,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 314 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-10-31 22:14:44,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 282. [2024-10-31 22:14:44,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 213 states have (on average 1.7887323943661972) internal successors, (381), 271 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 397 transitions. [2024-10-31 22:14:44,149 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 397 transitions. Word has length 11 [2024-10-31 22:14:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:44,150 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 397 transitions. [2024-10-31 22:14:44,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 397 transitions. [2024-10-31 22:14:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 22:14:44,151 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:44,151 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:44,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:14:44,151 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:44,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 683754949, now seen corresponding path program 1 times [2024-10-31 22:14:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:44,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992727723] [2024-10-31 22:14:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:44,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:44,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992727723] [2024-10-31 22:14:44,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992727723] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:44,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:44,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:44,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838538019] [2024-10-31 22:14:44,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:44,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:44,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:44,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:44,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:44,198 INFO L87 Difference]: Start difference. First operand 282 states and 397 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:44,348 INFO L93 Difference]: Finished difference Result 337 states and 448 transitions. [2024-10-31 22:14:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 22:14:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:44,350 INFO L225 Difference]: With dead ends: 337 [2024-10-31 22:14:44,352 INFO L226 Difference]: Without dead ends: 330 [2024-10-31 22:14:44,352 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 [2024-10-31 22:14:44,353 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 75 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 237 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 [2024-10-31 22:14:44,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 237 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-10-31 22:14:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 279. [2024-10-31 22:14:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 210 states have (on average 1.7904761904761906) internal successors, (376), 268 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 392 transitions. [2024-10-31 22:14:44,365 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 392 transitions. Word has length 12 [2024-10-31 22:14:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:44,366 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 392 transitions. [2024-10-31 22:14:44,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 392 transitions. [2024-10-31 22:14:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 22:14:44,369 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:44,369 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:44,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:14:44,369 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:44,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:44,370 INFO L85 PathProgramCache]: Analyzing trace with hash -930261550, now seen corresponding path program 1 times [2024-10-31 22:14:44,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:44,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593951028] [2024-10-31 22:14:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:44,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:44,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:44,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:44,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593951028] [2024-10-31 22:14:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593951028] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:44,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:44,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:14:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502062263] [2024-10-31 22:14:44,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:44,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:44,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:44,444 INFO L87 Difference]: Start difference. First operand 279 states and 392 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2024-10-31 22:14:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:44,477 INFO L93 Difference]: Finished difference Result 439 states and 602 transitions. [2024-10-31 22:14:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:44,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2024-10-31 22:14:44,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:44,479 INFO L225 Difference]: With dead ends: 439 [2024-10-31 22:14:44,480 INFO L226 Difference]: Without dead ends: 439 [2024-10-31 22:14:44,480 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:44,482 INFO L432 NwaCegarLoop]: 160 mSDtfsCounter, 148 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:44,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 448 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-10-31 22:14:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 283. [2024-10-31 22:14:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.766355140186916) internal successors, (378), 272 states have internal predecessors, (378), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 394 transitions. [2024-10-31 22:14:44,492 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 394 transitions. Word has length 14 [2024-10-31 22:14:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:44,494 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 394 transitions. [2024-10-31 22:14:44,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2024-10-31 22:14:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 394 transitions. [2024-10-31 22:14:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 22:14:44,495 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:44,495 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:44,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:14:44,495 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:44,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:44,496 INFO L85 PathProgramCache]: Analyzing trace with hash -120914924, now seen corresponding path program 1 times [2024-10-31 22:14:44,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:44,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164838952] [2024-10-31 22:14:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:44,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:44,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:44,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164838952] [2024-10-31 22:14:44,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164838952] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:44,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:44,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:44,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444010902] [2024-10-31 22:14:44,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:44,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:44,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:44,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:44,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:44,618 INFO L87 Difference]: Start difference. First operand 283 states and 394 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2024-10-31 22:14:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:44,884 INFO L93 Difference]: Finished difference Result 379 states and 490 transitions. [2024-10-31 22:14:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 [2024-10-31 22:14:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:44,886 INFO L225 Difference]: With dead ends: 379 [2024-10-31 22:14:44,886 INFO L226 Difference]: Without dead ends: 379 [2024-10-31 22:14:44,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:44,887 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 168 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:44,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 300 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2024-10-31 22:14:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 283. [2024-10-31 22:14:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.7383177570093458) internal successors, (372), 272 states have internal predecessors, (372), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 388 transitions. [2024-10-31 22:14:44,897 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 388 transitions. Word has length 14 [2024-10-31 22:14:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:44,898 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 388 transitions. [2024-10-31 22:14:44,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2024-10-31 22:14:44,898 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 388 transitions. [2024-10-31 22:14:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 22:14:44,898 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:44,899 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:44,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:14:44,899 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:44,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash -120914923, now seen corresponding path program 1 times [2024-10-31 22:14:44,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:44,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390314918] [2024-10-31 22:14:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:45,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:45,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390314918] [2024-10-31 22:14:45,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390314918] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:45,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:45,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:45,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062819235] [2024-10-31 22:14:45,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:45,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:14:45,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:14:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:45,117 INFO L87 Difference]: Start difference. First operand 283 states and 388 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2024-10-31 22:14:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:45,381 INFO L93 Difference]: Finished difference Result 323 states and 397 transitions. [2024-10-31 22:14:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2024-10-31 22:14:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:45,383 INFO L225 Difference]: With dead ends: 323 [2024-10-31 22:14:45,383 INFO L226 Difference]: Without dead ends: 323 [2024-10-31 22:14:45,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:14:45,384 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 93 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:45,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 578 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-10-31 22:14:45,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 287. [2024-10-31 22:14:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7293577981651376) internal successors, (377), 274 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 393 transitions. [2024-10-31 22:14:45,392 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 393 transitions. Word has length 14 [2024-10-31 22:14:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:45,392 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 393 transitions. [2024-10-31 22:14:45,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2024-10-31 22:14:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 393 transitions. [2024-10-31 22:14:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-31 22:14:45,393 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:45,393 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:45,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:14:45,394 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:45,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256562, now seen corresponding path program 1 times [2024-10-31 22:14:45,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:45,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948829057] [2024-10-31 22:14:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:45,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,480 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:14:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:45,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:45,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948829057] [2024-10-31 22:14:45,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948829057] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:45,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:45,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:45,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508408780] [2024-10-31 22:14:45,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:45,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:45,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:45,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:45,491 INFO L87 Difference]: Start difference. First operand 287 states and 393 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-10-31 22:14:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:45,725 INFO L93 Difference]: Finished difference Result 379 states and 488 transitions. [2024-10-31 22:14:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:45,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17 [2024-10-31 22:14:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:45,727 INFO L225 Difference]: With dead ends: 379 [2024-10-31 22:14:45,727 INFO L226 Difference]: Without dead ends: 379 [2024-10-31 22:14:45,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:45,728 INFO L432 NwaCegarLoop]: 112 mSDtfsCounter, 138 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:45,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 307 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2024-10-31 22:14:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 293. [2024-10-31 22:14:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.7098214285714286) internal successors, (383), 280 states have internal predecessors, (383), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 399 transitions. [2024-10-31 22:14:45,740 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 399 transitions. Word has length 17 [2024-10-31 22:14:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:45,740 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 399 transitions. [2024-10-31 22:14:45,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-10-31 22:14:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 399 transitions. [2024-10-31 22:14:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-31 22:14:45,743 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:45,743 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:45,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:14:45,746 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:45,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:45,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256563, now seen corresponding path program 1 times [2024-10-31 22:14:45,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:45,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099654685] [2024-10-31 22:14:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:45,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:14:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:45,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:45,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099654685] [2024-10-31 22:14:45,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099654685] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:45,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:45,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:45,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433552458] [2024-10-31 22:14:45,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:45,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:45,886 INFO L87 Difference]: Start difference. First operand 293 states and 399 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-10-31 22:14:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:46,088 INFO L93 Difference]: Finished difference Result 328 states and 399 transitions. [2024-10-31 22:14:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:46,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17 [2024-10-31 22:14:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:46,090 INFO L225 Difference]: With dead ends: 328 [2024-10-31 22:14:46,090 INFO L226 Difference]: Without dead ends: 328 [2024-10-31 22:14:46,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:46,091 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 96 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:46,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 364 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-10-31 22:14:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 293. [2024-10-31 22:14:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.6830357142857142) internal successors, (377), 280 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 393 transitions. [2024-10-31 22:14:46,098 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 393 transitions. Word has length 17 [2024-10-31 22:14:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:46,098 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 393 transitions. [2024-10-31 22:14:46,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-10-31 22:14:46,099 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 393 transitions. [2024-10-31 22:14:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-31 22:14:46,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:46,099 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:46,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:14:46,100 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:46,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140034, now seen corresponding path program 1 times [2024-10-31 22:14:46,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:46,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405818921] [2024-10-31 22:14:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:46,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:46,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405818921] [2024-10-31 22:14:46,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405818921] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:46,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:46,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137105094] [2024-10-31 22:14:46,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:46,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:46,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:46,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:46,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:46,147 INFO L87 Difference]: Start difference. First operand 293 states and 393 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2024-10-31 22:14:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:46,243 INFO L93 Difference]: Finished difference Result 290 states and 387 transitions. [2024-10-31 22:14:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:46,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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 20 [2024-10-31 22:14:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:46,244 INFO L225 Difference]: With dead ends: 290 [2024-10-31 22:14:46,245 INFO L226 Difference]: Without dead ends: 290 [2024-10-31 22:14:46,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:46,245 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:46,246 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 244 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-10-31 22:14:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2024-10-31 22:14:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 224 states have (on average 1.65625) internal successors, (371), 277 states have internal predecessors, (371), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 387 transitions. [2024-10-31 22:14:46,257 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 387 transitions. Word has length 20 [2024-10-31 22:14:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:46,258 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 387 transitions. [2024-10-31 22:14:46,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2024-10-31 22:14:46,258 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 387 transitions. [2024-10-31 22:14:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-31 22:14:46,259 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:46,259 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:46,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:14:46,259 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:46,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:46,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140033, now seen corresponding path program 1 times [2024-10-31 22:14:46,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:46,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104019997] [2024-10-31 22:14:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:46,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:46,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104019997] [2024-10-31 22:14:46,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104019997] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:46,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:46,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:46,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867803839] [2024-10-31 22:14:46,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:46,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:46,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:46,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:46,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:46,351 INFO L87 Difference]: Start difference. First operand 290 states and 387 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-10-31 22:14:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:46,446 INFO L93 Difference]: Finished difference Result 293 states and 389 transitions. [2024-10-31 22:14:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:46,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 20 [2024-10-31 22:14:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:46,448 INFO L225 Difference]: With dead ends: 293 [2024-10-31 22:14:46,448 INFO L226 Difference]: Without dead ends: 293 [2024-10-31 22:14:46,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:46,449 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 8 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:46,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 258 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-10-31 22:14:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2024-10-31 22:14:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 228 states have (on average 1.6359649122807018) internal successors, (373), 280 states have internal predecessors, (373), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 389 transitions. [2024-10-31 22:14:46,456 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 389 transitions. Word has length 20 [2024-10-31 22:14:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:46,456 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 389 transitions. [2024-10-31 22:14:46,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-10-31 22:14:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 389 transitions. [2024-10-31 22:14:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-31 22:14:46,457 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:46,457 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:46,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:14:46,458 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:46,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:46,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1952233834, now seen corresponding path program 1 times [2024-10-31 22:14:46,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:46,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495359221] [2024-10-31 22:14:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495359221] [2024-10-31 22:14:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495359221] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:46,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:46,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:14:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69718491] [2024-10-31 22:14:46,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:46,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:46,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:46,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:46,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:46,569 INFO L87 Difference]: Start difference. First operand 293 states and 389 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-10-31 22:14:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:46,605 INFO L93 Difference]: Finished difference Result 299 states and 395 transitions. [2024-10-31 22:14:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 21 [2024-10-31 22:14:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:46,606 INFO L225 Difference]: With dead ends: 299 [2024-10-31 22:14:46,606 INFO L226 Difference]: Without dead ends: 299 [2024-10-31 22:14:46,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:46,607 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 11 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:46,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 300 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-10-31 22:14:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 295. [2024-10-31 22:14:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6304347826086956) internal successors, (375), 282 states have internal predecessors, (375), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2024-10-31 22:14:46,614 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 21 [2024-10-31 22:14:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:46,614 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2024-10-31 22:14:46,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-10-31 22:14:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2024-10-31 22:14:46,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-31 22:14:46,615 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:46,615 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:46,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:14:46,615 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:46,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1952289538, now seen corresponding path program 1 times [2024-10-31 22:14:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:46,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678388602] [2024-10-31 22:14:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:46,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:46,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678388602] [2024-10-31 22:14:46,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678388602] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:46,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:46,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:14:46,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246384866] [2024-10-31 22:14:46,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:46,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:14:46,703 INFO L87 Difference]: Start difference. First operand 295 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-10-31 22:14:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:46,760 INFO L93 Difference]: Finished difference Result 285 states and 375 transitions. [2024-10-31 22:14:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:46,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 21 [2024-10-31 22:14:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:46,761 INFO L225 Difference]: With dead ends: 285 [2024-10-31 22:14:46,762 INFO L226 Difference]: Without dead ends: 285 [2024-10-31 22:14:46,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:14:46,762 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 31 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:46,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 834 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-10-31 22:14:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2024-10-31 22:14:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 222 states have (on average 1.617117117117117) internal successors, (359), 272 states have internal predecessors, (359), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:14:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 375 transitions. [2024-10-31 22:14:46,769 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 375 transitions. Word has length 21 [2024-10-31 22:14:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:46,769 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 375 transitions. [2024-10-31 22:14:46,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-10-31 22:14:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 375 transitions. [2024-10-31 22:14:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-31 22:14:46,770 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:46,770 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:46,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 22:14:46,771 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:46,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1056785802, now seen corresponding path program 1 times [2024-10-31 22:14:46,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:46,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072885552] [2024-10-31 22:14:46,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:47,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:14:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:47,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072885552] [2024-10-31 22:14:47,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072885552] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:47,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:47,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:14:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192276402] [2024-10-31 22:14:47,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:47,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:14:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:14:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:14:47,114 INFO L87 Difference]: Start difference. First operand 285 states and 375 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-10-31 22:14:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:47,558 INFO L93 Difference]: Finished difference Result 385 states and 486 transitions. [2024-10-31 22:14:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:14:47,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 23 [2024-10-31 22:14:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:47,560 INFO L225 Difference]: With dead ends: 385 [2024-10-31 22:14:47,560 INFO L226 Difference]: Without dead ends: 385 [2024-10-31 22:14:47,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:14:47,561 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 86 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:47,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 849 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-10-31 22:14:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 337. [2024-10-31 22:14:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 269 states have (on average 1.5910780669144982) internal successors, (428), 320 states have internal predecessors, (428), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-31 22:14:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 450 transitions. [2024-10-31 22:14:47,570 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 450 transitions. Word has length 23 [2024-10-31 22:14:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:47,570 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 450 transitions. [2024-10-31 22:14:47,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-10-31 22:14:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 450 transitions. [2024-10-31 22:14:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:14:47,571 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:47,571 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:47,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-31 22:14:47,572 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:47,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233503, now seen corresponding path program 1 times [2024-10-31 22:14:47,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:47,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84858718] [2024-10-31 22:14:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:47,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:47,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:14:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:47,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:47,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84858718] [2024-10-31 22:14:47,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84858718] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:47,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:47,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:14:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199722074] [2024-10-31 22:14:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:47,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:47,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:47,639 INFO L87 Difference]: Start difference. First operand 337 states and 450 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2024-10-31 22:14:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:47,752 INFO L93 Difference]: Finished difference Result 342 states and 449 transitions. [2024-10-31 22:14:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 25 [2024-10-31 22:14:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:47,754 INFO L225 Difference]: With dead ends: 342 [2024-10-31 22:14:47,754 INFO L226 Difference]: Without dead ends: 342 [2024-10-31 22:14:47,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:47,755 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 42 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:47,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 308 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-10-31 22:14:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 333. [2024-10-31 22:14:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 271 states have (on average 1.5313653136531364) internal successors, (415), 316 states have internal predecessors, (415), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-31 22:14:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 437 transitions. [2024-10-31 22:14:47,764 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 437 transitions. Word has length 25 [2024-10-31 22:14:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:47,765 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 437 transitions. [2024-10-31 22:14:47,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2024-10-31 22:14:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 437 transitions. [2024-10-31 22:14:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:14:47,765 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:47,766 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:47,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-31 22:14:47,766 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:47,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:47,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233502, now seen corresponding path program 1 times [2024-10-31 22:14:47,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:47,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635428131] [2024-10-31 22:14:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:47,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:47,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:14:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:47,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:47,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635428131] [2024-10-31 22:14:47,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635428131] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:47,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:47,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:14:47,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034509192] [2024-10-31 22:14:47,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:47,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:14:47,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:47,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:14:47,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:14:47,977 INFO L87 Difference]: Start difference. First operand 333 states and 437 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2024-10-31 22:14:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:48,230 INFO L93 Difference]: Finished difference Result 322 states and 387 transitions. [2024-10-31 22:14:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:14:48,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 25 [2024-10-31 22:14:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:48,233 INFO L225 Difference]: With dead ends: 322 [2024-10-31 22:14:48,233 INFO L226 Difference]: Without dead ends: 322 [2024-10-31 22:14:48,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:14:48,234 INFO L432 NwaCegarLoop]: 140 mSDtfsCounter, 72 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:48,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 947 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-10-31 22:14:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 280. [2024-10-31 22:14:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 220 states have (on average 1.4772727272727273) internal successors, (325), 265 states have internal predecessors, (325), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:14:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 345 transitions. [2024-10-31 22:14:48,242 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 345 transitions. Word has length 25 [2024-10-31 22:14:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:48,242 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 345 transitions. [2024-10-31 22:14:48,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2024-10-31 22:14:48,242 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 345 transitions. [2024-10-31 22:14:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:14:48,243 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:48,243 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:48,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-31 22:14:48,244 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:48,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 456369005, now seen corresponding path program 1 times [2024-10-31 22:14:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:48,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322922474] [2024-10-31 22:14:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:48,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:48,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:48,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322922474] [2024-10-31 22:14:48,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322922474] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:48,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:48,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:14:48,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693141394] [2024-10-31 22:14:48,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:48,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:14:48,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:48,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:14:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:14:48,575 INFO L87 Difference]: Start difference. First operand 280 states and 345 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 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) [2024-10-31 22:14:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:48,873 INFO L93 Difference]: Finished difference Result 315 states and 376 transitions. [2024-10-31 22:14:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:14:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 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 25 [2024-10-31 22:14:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:48,876 INFO L225 Difference]: With dead ends: 315 [2024-10-31 22:14:48,876 INFO L226 Difference]: Without dead ends: 315 [2024-10-31 22:14:48,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:14:48,877 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 69 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:48,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 925 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-10-31 22:14:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 300. [2024-10-31 22:14:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 240 states have (on average 1.4375) internal successors, (345), 285 states have internal predecessors, (345), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:14:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 365 transitions. [2024-10-31 22:14:48,891 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 365 transitions. Word has length 25 [2024-10-31 22:14:48,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:48,892 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 365 transitions. [2024-10-31 22:14:48,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 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) [2024-10-31 22:14:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 365 transitions. [2024-10-31 22:14:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-31 22:14:48,893 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:48,893 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:48,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-31 22:14:48,893 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:48,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash 484106160, now seen corresponding path program 1 times [2024-10-31 22:14:48,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:48,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002189541] [2024-10-31 22:14:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:48,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:49,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:49,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002189541] [2024-10-31 22:14:49,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002189541] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:49,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:49,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:14:49,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523695749] [2024-10-31 22:14:49,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:49,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:14:49,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:14:49,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:14:49,263 INFO L87 Difference]: Start difference. First operand 300 states and 365 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2024-10-31 22:14:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:49,806 INFO L93 Difference]: Finished difference Result 364 states and 420 transitions. [2024-10-31 22:14:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:14:49,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 27 [2024-10-31 22:14:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:49,807 INFO L225 Difference]: With dead ends: 364 [2024-10-31 22:14:49,808 INFO L226 Difference]: Without dead ends: 364 [2024-10-31 22:14:49,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:14:49,809 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 130 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:49,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 626 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:14:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-10-31 22:14:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 300. [2024-10-31 22:14:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 240 states have (on average 1.4333333333333333) internal successors, (344), 285 states have internal predecessors, (344), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:14:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 364 transitions. [2024-10-31 22:14:49,817 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 364 transitions. Word has length 27 [2024-10-31 22:14:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:49,817 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 364 transitions. [2024-10-31 22:14:49,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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) [2024-10-31 22:14:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 364 transitions. [2024-10-31 22:14:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-31 22:14:49,818 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:49,818 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:49,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-31 22:14:49,819 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:49,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:49,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2122389103, now seen corresponding path program 1 times [2024-10-31 22:14:49,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:49,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619408672] [2024-10-31 22:14:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:49,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:49,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:49,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619408672] [2024-10-31 22:14:49,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619408672] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:49,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:49,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:14:49,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476160640] [2024-10-31 22:14:49,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:49,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:49,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:49,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:14:50,000 INFO L87 Difference]: Start difference. First operand 300 states and 364 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2024-10-31 22:14:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:50,142 INFO L93 Difference]: Finished difference Result 300 states and 362 transitions. [2024-10-31 22:14:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:14:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 28 [2024-10-31 22:14:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:50,145 INFO L225 Difference]: With dead ends: 300 [2024-10-31 22:14:50,145 INFO L226 Difference]: Without dead ends: 300 [2024-10-31 22:14:50,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:14:50,146 INFO L432 NwaCegarLoop]: 129 mSDtfsCounter, 13 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:50,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 697 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:50,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-10-31 22:14:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2024-10-31 22:14:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 240 states have (on average 1.4166666666666667) internal successors, (340), 283 states have internal predecessors, (340), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:14:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 360 transitions. [2024-10-31 22:14:50,154 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 360 transitions. Word has length 28 [2024-10-31 22:14:50,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:50,155 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 360 transitions. [2024-10-31 22:14:50,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2024-10-31 22:14:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 360 transitions. [2024-10-31 22:14:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 22:14:50,156 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:50,156 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:50,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-31 22:14:50,156 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:50,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash -493536303, now seen corresponding path program 1 times [2024-10-31 22:14:50,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:50,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356159552] [2024-10-31 22:14:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:50,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:50,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356159552] [2024-10-31 22:14:50,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356159552] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:50,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:50,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:14:50,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954190328] [2024-10-31 22:14:50,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:50,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:50,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:50,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:50,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:14:50,481 INFO L87 Difference]: Start difference. First operand 298 states and 360 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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) [2024-10-31 22:14:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:50,773 INFO L93 Difference]: Finished difference Result 359 states and 415 transitions. [2024-10-31 22:14:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:14:50,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 30 [2024-10-31 22:14:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:50,775 INFO L225 Difference]: With dead ends: 359 [2024-10-31 22:14:50,775 INFO L226 Difference]: Without dead ends: 359 [2024-10-31 22:14:50,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:14:50,775 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 150 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:50,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 264 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2024-10-31 22:14:50,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 298. [2024-10-31 22:14:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 240 states have (on average 1.4083333333333334) internal successors, (338), 283 states have internal predecessors, (338), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:14:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 358 transitions. [2024-10-31 22:14:50,783 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 358 transitions. Word has length 30 [2024-10-31 22:14:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:50,783 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 358 transitions. [2024-10-31 22:14:50,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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) [2024-10-31 22:14:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 358 transitions. [2024-10-31 22:14:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 22:14:50,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:50,784 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:50,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-31 22:14:50,784 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:50,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1918246339, now seen corresponding path program 1 times [2024-10-31 22:14:50,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:50,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438904414] [2024-10-31 22:14:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:50,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:14:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:50,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438904414] [2024-10-31 22:14:50,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438904414] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579812993] [2024-10-31 22:14:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:50,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:50,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:50,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:14:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 22:14:50,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:14:50,988 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:50,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579812993] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:50,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:14:50,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-10-31 22:14:50,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397818523] [2024-10-31 22:14:50,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:50,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:50,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:50,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:50,990 INFO L87 Difference]: Start difference. First operand 298 states and 358 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-10-31 22:14:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:51,008 INFO L93 Difference]: Finished difference Result 302 states and 361 transitions. [2024-10-31 22:14:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:51,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2024-10-31 22:14:51,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:51,009 INFO L225 Difference]: With dead ends: 302 [2024-10-31 22:14:51,009 INFO L226 Difference]: Without dead ends: 301 [2024-10-31 22:14:51,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:51,010 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 0 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:51,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 283 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-10-31 22:14:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2024-10-31 22:14:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 243 states have (on average 1.3991769547325104) internal successors, (340), 286 states have internal predecessors, (340), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-31 22:14:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 360 transitions. [2024-10-31 22:14:51,027 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 360 transitions. Word has length 33 [2024-10-31 22:14:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:51,027 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 360 transitions. [2024-10-31 22:14:51,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-10-31 22:14:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 360 transitions. [2024-10-31 22:14:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 22:14:51,028 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:51,028 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:51,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:14:51,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-31 22:14:51,229 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:51,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:51,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1559072507, now seen corresponding path program 1 times [2024-10-31 22:14:51,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:51,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977322779] [2024-10-31 22:14:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:51,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:14:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:51,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:51,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977322779] [2024-10-31 22:14:51,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977322779] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:51,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:51,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-31 22:14:51,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49753400] [2024-10-31 22:14:51,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:51,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:14:51,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:51,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:14:51,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:14:51,752 INFO L87 Difference]: Start difference. First operand 301 states and 360 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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) [2024-10-31 22:14:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:52,226 INFO L93 Difference]: Finished difference Result 257 states and 303 transitions. [2024-10-31 22:14:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:14:52,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 33 [2024-10-31 22:14:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:52,228 INFO L225 Difference]: With dead ends: 257 [2024-10-31 22:14:52,228 INFO L226 Difference]: Without dead ends: 257 [2024-10-31 22:14:52,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:14:52,229 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 75 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:52,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 943 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-10-31 22:14:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 229. [2024-10-31 22:14:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 177 states have (on average 1.463276836158192) internal successors, (259), 219 states have internal predecessors, (259), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:14:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2024-10-31 22:14:52,235 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 33 [2024-10-31 22:14:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:52,236 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2024-10-31 22:14:52,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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) [2024-10-31 22:14:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2024-10-31 22:14:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 22:14:52,236 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:52,237 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:52,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-31 22:14:52,237 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:52,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash 896646995, now seen corresponding path program 1 times [2024-10-31 22:14:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:52,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674076902] [2024-10-31 22:14:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:52,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:52,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:52,284 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-31 22:14:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:14:52,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:52,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674076902] [2024-10-31 22:14:52,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674076902] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:52,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:52,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:52,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567648657] [2024-10-31 22:14:52,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:52,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:52,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:52,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:52,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:52,289 INFO L87 Difference]: Start difference. First operand 229 states and 271 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-10-31 22:14:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:52,301 INFO L93 Difference]: Finished difference Result 231 states and 273 transitions. [2024-10-31 22:14:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:52,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) Word has length 41 [2024-10-31 22:14:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:52,303 INFO L225 Difference]: With dead ends: 231 [2024-10-31 22:14:52,303 INFO L226 Difference]: Without dead ends: 231 [2024-10-31 22:14:52,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:52,304 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 0 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:52,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 284 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:14:52,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-10-31 22:14:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2024-10-31 22:14:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 179 states have (on average 1.458100558659218) internal successors, (261), 221 states have internal predecessors, (261), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:14:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 273 transitions. [2024-10-31 22:14:52,310 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 273 transitions. Word has length 41 [2024-10-31 22:14:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:52,310 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 273 transitions. [2024-10-31 22:14:52,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-10-31 22:14:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 273 transitions. [2024-10-31 22:14:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 22:14:52,311 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:52,311 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:52,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-31 22:14:52,311 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:52,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1705993621, now seen corresponding path program 1 times [2024-10-31 22:14:52,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:52,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385495823] [2024-10-31 22:14:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:52,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:52,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:52,658 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-31 22:14:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:52,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:52,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385495823] [2024-10-31 22:14:52,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385495823] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:52,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128337373] [2024-10-31 22:14:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:52,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:52,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:52,682 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:52,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:14:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:52,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 22:14:52,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:53,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:53,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:14:53,504 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 19 treesize of output 23 [2024-10-31 22:14:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:53,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128337373] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:53,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:53,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 22 [2024-10-31 22:14:53,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562236689] [2024-10-31 22:14:53,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:53,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:14:53,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:14:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:14:53,768 INFO L87 Difference]: Start difference. First operand 231 states and 273 transitions. Second operand has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 20 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:14:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:54,201 INFO L93 Difference]: Finished difference Result 231 states and 272 transitions. [2024-10-31 22:14:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 20 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2024-10-31 22:14:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:54,203 INFO L225 Difference]: With dead ends: 231 [2024-10-31 22:14:54,203 INFO L226 Difference]: Without dead ends: 231 [2024-10-31 22:14:54,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:14:54,204 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 328 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:54,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 747 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:14:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-10-31 22:14:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2024-10-31 22:14:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 179 states have (on average 1.441340782122905) internal successors, (258), 219 states have internal predecessors, (258), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:14:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 270 transitions. [2024-10-31 22:14:54,209 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 270 transitions. Word has length 41 [2024-10-31 22:14:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:54,210 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 270 transitions. [2024-10-31 22:14:54,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.954545454545454) internal successors, (109), 20 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:14:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 270 transitions. [2024-10-31 22:14:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 22:14:54,211 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:54,212 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:54,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:54,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-31 22:14:54,416 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:54,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1350180533, now seen corresponding path program 1 times [2024-10-31 22:14:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:54,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473257554] [2024-10-31 22:14:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:54,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-31 22:14:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473257554] [2024-10-31 22:14:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473257554] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451356655] [2024-10-31 22:14:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:54,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:54,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:54,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:54,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:14:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:14:54,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:54,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:54,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451356655] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:54,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:54,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-31 22:14:54,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860047450] [2024-10-31 22:14:54,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:54,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:14:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:14:54,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:14:54,840 INFO L87 Difference]: Start difference. First operand 229 states and 270 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-31 22:14:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:54,944 INFO L93 Difference]: Finished difference Result 809 states and 970 transitions. [2024-10-31 22:14:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:14:54,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2024-10-31 22:14:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:54,947 INFO L225 Difference]: With dead ends: 809 [2024-10-31 22:14:54,947 INFO L226 Difference]: Without dead ends: 809 [2024-10-31 22:14:54,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:14:54,948 INFO L432 NwaCegarLoop]: 245 mSDtfsCounter, 455 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:54,948 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1027 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2024-10-31 22:14:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 391. [2024-10-31 22:14:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 335 states have (on average 1.4149253731343283) internal successors, (474), 375 states have internal predecessors, (474), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-31 22:14:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 498 transitions. [2024-10-31 22:14:54,968 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 498 transitions. Word has length 44 [2024-10-31 22:14:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:54,968 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 498 transitions. [2024-10-31 22:14:54,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-31 22:14:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 498 transitions. [2024-10-31 22:14:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 22:14:54,969 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:54,969 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:54,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:55,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-31 22:14:55,171 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:55,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash 649115955, now seen corresponding path program 1 times [2024-10-31 22:14:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:55,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303247071] [2024-10-31 22:14:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:55,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:55,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-31 22:14:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:55,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:55,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303247071] [2024-10-31 22:14:55,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303247071] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:55,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685275486] [2024-10-31 22:14:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:55,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:55,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:55,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:55,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:14:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:55,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 22:14:55,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:55,970 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:55,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685275486] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:55,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:14:55,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2024-10-31 22:14:55,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209455059] [2024-10-31 22:14:55,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:55,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:55,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:55,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:14:55,972 INFO L87 Difference]: Start difference. First operand 391 states and 498 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2024-10-31 22:14:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:56,198 INFO L93 Difference]: Finished difference Result 396 states and 501 transitions. [2024-10-31 22:14:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:56,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 44 [2024-10-31 22:14:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:56,200 INFO L225 Difference]: With dead ends: 396 [2024-10-31 22:14:56,200 INFO L226 Difference]: Without dead ends: 396 [2024-10-31 22:14:56,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:14:56,201 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 261 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:56,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 319 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-10-31 22:14:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 388. [2024-10-31 22:14:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 335 states have (on average 1.4) internal successors, (469), 372 states have internal predecessors, (469), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-31 22:14:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 493 transitions. [2024-10-31 22:14:56,212 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 493 transitions. Word has length 44 [2024-10-31 22:14:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:56,212 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 493 transitions. [2024-10-31 22:14:56,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2024-10-31 22:14:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 493 transitions. [2024-10-31 22:14:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 22:14:56,213 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:56,213 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:56,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:14:56,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-31 22:14:56,414 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:56,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:56,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1534969807, now seen corresponding path program 1 times [2024-10-31 22:14:56,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:56,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741441704] [2024-10-31 22:14:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:56,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:56,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:56,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:56,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741441704] [2024-10-31 22:14:56,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741441704] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:56,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676702939] [2024-10-31 22:14:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:56,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:56,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:56,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:56,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:14:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:56,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:14:56,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:56,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:56,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676702939] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:56,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:56,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2024-10-31 22:14:56,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429320236] [2024-10-31 22:14:56,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:56,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:56,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:14:56,825 INFO L87 Difference]: Start difference. First operand 388 states and 493 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:56,920 INFO L93 Difference]: Finished difference Result 1375 states and 1726 transitions. [2024-10-31 22:14:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:14:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2024-10-31 22:14:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:56,925 INFO L225 Difference]: With dead ends: 1375 [2024-10-31 22:14:56,925 INFO L226 Difference]: Without dead ends: 1375 [2024-10-31 22:14:56,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:14:56,926 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 488 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:56,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 652 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2024-10-31 22:14:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 919. [2024-10-31 22:14:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 841 states have (on average 1.3721759809750298) internal successors, (1154), 878 states have internal predecessors, (1154), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-31 22:14:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1216 transitions. [2024-10-31 22:14:56,950 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1216 transitions. Word has length 45 [2024-10-31 22:14:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:56,951 INFO L471 AbstractCegarLoop]: Abstraction has 919 states and 1216 transitions. [2024-10-31 22:14:56,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1216 transitions. [2024-10-31 22:14:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 22:14:56,952 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:56,952 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:56,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:14:57,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:57,153 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:57,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:57,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816849, now seen corresponding path program 1 times [2024-10-31 22:14:57,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:57,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262693605] [2024-10-31 22:14:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:57,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:57,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:57,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:57,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262693605] [2024-10-31 22:14:57,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262693605] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:57,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203410815] [2024-10-31 22:14:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:57,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:57,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:57,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:57,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:14:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:57,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:14:57,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:57,955 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:57,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203410815] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:57,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:14:57,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2024-10-31 22:14:57,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374609767] [2024-10-31 22:14:57,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:57,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:57,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:57,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:14:57,957 INFO L87 Difference]: Start difference. First operand 919 states and 1216 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2024-10-31 22:14:58,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:58,182 INFO L93 Difference]: Finished difference Result 942 states and 1239 transitions. [2024-10-31 22:14:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:58,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 45 [2024-10-31 22:14:58,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:58,186 INFO L225 Difference]: With dead ends: 942 [2024-10-31 22:14:58,186 INFO L226 Difference]: Without dead ends: 942 [2024-10-31 22:14:58,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:14:58,187 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 148 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:58,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 331 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2024-10-31 22:14:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 921. [2024-10-31 22:14:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 843 states have (on average 1.3724792408066429) internal successors, (1157), 880 states have internal predecessors, (1157), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-31 22:14:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1219 transitions. [2024-10-31 22:14:58,210 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1219 transitions. Word has length 45 [2024-10-31 22:14:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:58,210 INFO L471 AbstractCegarLoop]: Abstraction has 921 states and 1219 transitions. [2024-10-31 22:14:58,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2024-10-31 22:14:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1219 transitions. [2024-10-31 22:14:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 22:14:58,211 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:58,211 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:58,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:14:58,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:58,415 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:58,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816787, now seen corresponding path program 1 times [2024-10-31 22:14:58,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:58,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516061249] [2024-10-31 22:14:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:58,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:58,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:14:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:58,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516061249] [2024-10-31 22:14:58,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516061249] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515839789] [2024-10-31 22:14:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:58,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:58,641 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:58,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:14:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:58,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:14:58,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:59,214 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:59,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515839789] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:59,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:14:59,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2024-10-31 22:14:59,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775583430] [2024-10-31 22:14:59,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:59,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:59,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:59,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:14:59,217 INFO L87 Difference]: Start difference. First operand 921 states and 1219 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2024-10-31 22:14:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:59,403 INFO L93 Difference]: Finished difference Result 941 states and 1237 transitions. [2024-10-31 22:14:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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 45 [2024-10-31 22:14:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:59,407 INFO L225 Difference]: With dead ends: 941 [2024-10-31 22:14:59,407 INFO L226 Difference]: Without dead ends: 941 [2024-10-31 22:14:59,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:14:59,408 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 252 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:59,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 256 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:14:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2024-10-31 22:14:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 918. [2024-10-31 22:14:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 841 states have (on average 1.3697978596908442) internal successors, (1152), 877 states have internal predecessors, (1152), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-31 22:14:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1214 transitions. [2024-10-31 22:14:59,431 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1214 transitions. Word has length 45 [2024-10-31 22:14:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:59,431 INFO L471 AbstractCegarLoop]: Abstraction has 918 states and 1214 transitions. [2024-10-31 22:14:59,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2024-10-31 22:14:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1214 transitions. [2024-10-31 22:14:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-31 22:14:59,433 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:59,433 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:59,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:14:59,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-31 22:14:59,638 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:14:59,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1040806822, now seen corresponding path program 1 times [2024-10-31 22:14:59,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:59,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672993912] [2024-10-31 22:14:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:59,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:01,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:15:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:01,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672993912] [2024-10-31 22:15:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672993912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:01,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:01,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-10-31 22:15:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955047393] [2024-10-31 22:15:01,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:01,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:15:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:15:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:15:01,082 INFO L87 Difference]: Start difference. First operand 918 states and 1214 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 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) [2024-10-31 22:15:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:01,844 INFO L93 Difference]: Finished difference Result 939 states and 1237 transitions. [2024-10-31 22:15:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:15:01,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 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 48 [2024-10-31 22:15:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:01,848 INFO L225 Difference]: With dead ends: 939 [2024-10-31 22:15:01,848 INFO L226 Difference]: Without dead ends: 939 [2024-10-31 22:15:01,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:15:01,849 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 71 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:01,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 667 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:15:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2024-10-31 22:15:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 934. [2024-10-31 22:15:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 857 states have (on average 1.3652275379229872) internal successors, (1170), 893 states have internal predecessors, (1170), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-31 22:15:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1232 transitions. [2024-10-31 22:15:01,873 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1232 transitions. Word has length 48 [2024-10-31 22:15:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:01,873 INFO L471 AbstractCegarLoop]: Abstraction has 934 states and 1232 transitions. [2024-10-31 22:15:01,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 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) [2024-10-31 22:15:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1232 transitions. [2024-10-31 22:15:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 22:15:01,875 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:01,875 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:01,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-10-31 22:15:01,875 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:15:01,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:01,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1279480752, now seen corresponding path program 1 times [2024-10-31 22:15:01,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:01,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939101115] [2024-10-31 22:15:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:01,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:02,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:15:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:02,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:02,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939101115] [2024-10-31 22:15:02,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939101115] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:02,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:02,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-31 22:15:02,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481785525] [2024-10-31 22:15:02,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:02,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:15:02,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:02,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:15:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:15:02,492 INFO L87 Difference]: Start difference. First operand 934 states and 1232 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 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) [2024-10-31 22:15:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:02,865 INFO L93 Difference]: Finished difference Result 930 states and 1198 transitions. [2024-10-31 22:15:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:15:02,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 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 49 [2024-10-31 22:15:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:02,869 INFO L225 Difference]: With dead ends: 930 [2024-10-31 22:15:02,870 INFO L226 Difference]: Without dead ends: 930 [2024-10-31 22:15:02,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:15:02,871 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 142 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:02,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 767 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2024-10-31 22:15:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 911. [2024-10-31 22:15:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 835 states have (on average 1.3377245508982036) internal successors, (1117), 870 states have internal predecessors, (1117), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-10-31 22:15:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1179 transitions. [2024-10-31 22:15:02,899 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1179 transitions. Word has length 49 [2024-10-31 22:15:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:02,900 INFO L471 AbstractCegarLoop]: Abstraction has 911 states and 1179 transitions. [2024-10-31 22:15:02,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 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) [2024-10-31 22:15:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1179 transitions. [2024-10-31 22:15:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 22:15:02,901 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:02,901 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:02,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-10-31 22:15:02,902 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2024-10-31 22:15:02,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:02,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225816, now seen corresponding path program 1 times [2024-10-31 22:15:02,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:02,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497202337] [2024-10-31 22:15:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:02,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:04,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:15:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:04,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:04,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497202337] [2024-10-31 22:15:04,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497202337] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:04,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683445105] [2024-10-31 22:15:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:04,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:04,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:04,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23529628-0855-4f41-a4c1-209337248a2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:15:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:04,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-31 22:15:04,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:04,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:15:05,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:15:05,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2024-10-31 22:15:05,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-10-31 22:15:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:05,868 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:15:05,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683445105] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:05,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:15:05,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [19] total 31 [2024-10-31 22:15:05,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612803475] [2024-10-31 22:15:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:05,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:15:05,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:15:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2024-10-31 22:15:05,871 INFO L87 Difference]: Start difference. First operand 911 states and 1179 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 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)