/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-pthread/cs_queue-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:47:57,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:47:57,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:47:57,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:47:57,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:47:57,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:47:57,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:47:57,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:47:57,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:47:57,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:47:57,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:47:57,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:47:57,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:47:57,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:47:57,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:47:57,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:47:57,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:47:57,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:47:57,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:47:57,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:47:57,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:47:57,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:47:57,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:47:57,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:47:57,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:47:57,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:47:57,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:47:57,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:47:57,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:47:57,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:47:57,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:47:57,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:47:57,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:47:57,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:47:57,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:47:57,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:47:57,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:47:57,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:47:57,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:47:57,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:47:57,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:47:57,348 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:47:57,403 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:47:57,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:47:57,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:47:57,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:47:57,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:47:57,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:47:57,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:47:57,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:47:57,410 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:47:57,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:47:57,412 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:47:57,412 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:47:57,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:47:57,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:47:57,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:47:57,413 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:47:57,413 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:47:57,413 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:47:57,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:47:57,414 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:47:57,414 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:47:57,414 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:47:57,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:47:57,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:47:57,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:47:57,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:47:57,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:47:57,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:47:57,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:47:57,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:47:57,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:47:57,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:47:57,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:47:57,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:47:57,908 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:47:57,909 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:47:57,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_queue-1.i [2022-10-15 17:47:58,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df9f86296/856d92e988db45fcb6a2b2657aadfddb/FLAG19289ab01 [2022-10-15 17:47:58,847 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:47:58,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_queue-1.i [2022-10-15 17:47:58,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df9f86296/856d92e988db45fcb6a2b2657aadfddb/FLAG19289ab01 [2022-10-15 17:47:59,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df9f86296/856d92e988db45fcb6a2b2657aadfddb [2022-10-15 17:47:59,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:47:59,042 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:47:59,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:47:59,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:47:59,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:47:59,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:47:59" (1/1) ... [2022-10-15 17:47:59,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66729d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:59, skipping insertion in model container [2022-10-15 17:47:59,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:47:59" (1/1) ... [2022-10-15 17:47:59,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:47:59,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:47:59,819 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_queue-1.i[34744,34757] [2022-10-15 17:48:00,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:48:00,097 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:48:00,135 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_queue-1.i[34744,34757] [2022-10-15 17:48:00,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:48:00,417 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:48:00,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00 WrapperNode [2022-10-15 17:48:00,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:48:00,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:48:00,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:48:00,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:48:00,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,582 INFO L138 Inliner]: procedures = 251, calls = 536, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 1160 [2022-10-15 17:48:00,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:48:00,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:48:00,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:48:00,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:48:00,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:48:00,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:48:00,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:48:00,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:48:00,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (1/1) ... [2022-10-15 17:48:00,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:48:00,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:00,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 17:48:00,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 17:48:00,841 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:48:00,841 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:48:00,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:48:00,842 INFO L130 BoogieDeclarations]: Found specification of procedure empty [2022-10-15 17:48:00,842 INFO L138 BoogieDeclarations]: Found implementation of procedure empty [2022-10-15 17:48:00,842 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2022-10-15 17:48:00,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2022-10-15 17:48:00,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-15 17:48:00,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:48:00,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-15 17:48:00,843 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2022-10-15 17:48:00,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2022-10-15 17:48:00,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:48:00,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-15 17:48:00,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-15 17:48:00,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:48:00,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:48:00,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-15 17:48:00,844 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2022-10-15 17:48:00,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2022-10-15 17:48:00,845 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2022-10-15 17:48:00,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2022-10-15 17:48:00,845 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-10-15 17:48:00,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-10-15 17:48:00,845 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2022-10-15 17:48:00,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2022-10-15 17:48:00,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:48:00,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:48:00,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:48:01,143 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:48:01,146 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:48:01,261 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:01,261 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:01,261 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume 0 != ~__CS_ret~0 % 256;#res := 0; [2022-10-15 17:48:01,261 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume 0 != ~__CS_ret~0 % 256;#res := 0; [2022-10-15 17:48:02,072 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L1093: SUMMARY for call __CS_cs(); srcloc: null [2022-10-15 17:48:02,072 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L1093-1: assume 0 != ~__CS_ret~0 % 256;t2_#res#1.base, t2_#res#1.offset := 0, 0; [2022-10-15 17:48:02,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L1093-1: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:02,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L1129: SUMMARY for call __CS_cs(); srcloc: null [2022-10-15 17:48:02,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L1129-1: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2022-10-15 17:48:02,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L1129-1: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:02,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume 0 != ~__CS_ret~0 % 256;t2_#res#1.base, t2_#res#1.offset := 0, 0; [2022-10-15 17:48:02,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:02,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##83: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:02,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##82: assume 0 != ~__CS_ret~0 % 256;dequeue_#res#1 := 0; [2022-10-15 17:48:02,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##89: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:02,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##88: assume 0 != ~__CS_ret~0 % 256;t2_#res#1.base, t2_#res#1.offset := 0, 0; [2022-10-15 17:48:02,075 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:02,075 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2022-10-15 17:48:02,075 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:02,075 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2022-10-15 17:48:02,075 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##149: assume 0 != ~__CS_ret~0 % 256;enqueue_#res#1 := 0; [2022-10-15 17:48:02,076 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##150: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:02,076 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##166: assume 0 != ~__CS_ret~0 % 256;t1_#res#1.base, t1_#res#1.offset := 0, 0; [2022-10-15 17:48:02,076 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##167: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:02,076 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##109: assume 0 != ~__CS_ret~0 % 256;t2_#res#1.base, t2_#res#1.offset := 0, 0; [2022-10-15 17:48:02,076 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##110: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:48:03,332 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:48:03,349 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:48:03,350 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-15 17:48:03,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:48:03 BoogieIcfgContainer [2022-10-15 17:48:03,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:48:03,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:48:03,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:48:03,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:48:03,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:47:59" (1/3) ... [2022-10-15 17:48:03,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395cffda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:48:03, skipping insertion in model container [2022-10-15 17:48:03,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:48:00" (2/3) ... [2022-10-15 17:48:03,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395cffda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:48:03, skipping insertion in model container [2022-10-15 17:48:03,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:48:03" (3/3) ... [2022-10-15 17:48:03,365 INFO L112 eAbstractionObserver]: Analyzing ICFG cs_queue-1.i [2022-10-15 17:48:03,388 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:48:03,389 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 557 error locations. [2022-10-15 17:48:03,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:48:03,487 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2ad12b31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:48:03,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 557 error locations. [2022-10-15 17:48:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 1259 states, 560 states have (on average 2.1660714285714286) internal successors, (1213), 1118 states have internal predecessors, (1213), 132 states have call successors, (132), 9 states have call predecessors, (132), 9 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2022-10-15 17:48:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:48:03,509 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:03,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:48:03,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash 23121052, now seen corresponding path program 1 times [2022-10-15 17:48:03,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:03,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6771639] [2022-10-15 17:48:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:03,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:04,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6771639] [2022-10-15 17:48:04,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6771639] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:04,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:04,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:48:04,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139183852] [2022-10-15 17:48:04,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:04,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:04,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:04,116 INFO L87 Difference]: Start difference. First operand has 1259 states, 560 states have (on average 2.1660714285714286) internal successors, (1213), 1118 states have internal predecessors, (1213), 132 states have call successors, (132), 9 states have call predecessors, (132), 9 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:04,382 INFO L93 Difference]: Finished difference Result 1302 states and 1512 transitions. [2022-10-15 17:48:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:04,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:48:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:04,427 INFO L225 Difference]: With dead ends: 1302 [2022-10-15 17:48:04,427 INFO L226 Difference]: Without dead ends: 1300 [2022-10-15 17:48:04,430 INFO L412 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 [2022-10-15 17:48:04,439 INFO L413 NwaCegarLoop]: 1437 mSDtfsCounter, 52 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2872 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:04,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2872 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:48:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-10-15 17:48:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1251. [2022-10-15 17:48:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 558 states have (on average 2.14336917562724) internal successors, (1196), 1111 states have internal predecessors, (1196), 131 states have call successors, (131), 9 states have call predecessors, (131), 9 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-10-15 17:48:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1458 transitions. [2022-10-15 17:48:04,631 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1458 transitions. Word has length 4 [2022-10-15 17:48:04,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:04,632 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1458 transitions. [2022-10-15 17:48:04,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1458 transitions. [2022-10-15 17:48:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:48:04,633 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:04,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:48:04,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:48:04,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:04,635 INFO L85 PathProgramCache]: Analyzing trace with hash 23121029, now seen corresponding path program 1 times [2022-10-15 17:48:04,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:04,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285032570] [2022-10-15 17:48:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:04,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:05,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:05,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285032570] [2022-10-15 17:48:05,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285032570] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:05,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:05,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:05,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880529259] [2022-10-15 17:48:05,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:05,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:05,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:05,763 INFO L87 Difference]: Start difference. First operand 1251 states and 1458 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:06,799 INFO L93 Difference]: Finished difference Result 1322 states and 1539 transitions. [2022-10-15 17:48:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:06,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:48:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:06,811 INFO L225 Difference]: With dead ends: 1322 [2022-10-15 17:48:06,811 INFO L226 Difference]: Without dead ends: 1322 [2022-10-15 17:48:06,812 INFO L412 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 [2022-10-15 17:48:06,813 INFO L413 NwaCegarLoop]: 1008 mSDtfsCounter, 818 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:06,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 1446 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-15 17:48:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-10-15 17:48:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1279. [2022-10-15 17:48:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 582 states have (on average 2.149484536082474) internal successors, (1251), 1133 states have internal predecessors, (1251), 137 states have call successors, (137), 9 states have call predecessors, (137), 9 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2022-10-15 17:48:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1525 transitions. [2022-10-15 17:48:06,873 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1525 transitions. Word has length 4 [2022-10-15 17:48:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:06,873 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 1525 transitions. [2022-10-15 17:48:06,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1525 transitions. [2022-10-15 17:48:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:48:06,874 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:06,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:48:06,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:48:06,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:06,876 INFO L85 PathProgramCache]: Analyzing trace with hash 23121030, now seen corresponding path program 1 times [2022-10-15 17:48:06,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:06,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155259694] [2022-10-15 17:48:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:06,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:07,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:07,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155259694] [2022-10-15 17:48:07,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155259694] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:07,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:07,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:07,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766439208] [2022-10-15 17:48:07,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:07,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:07,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:07,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:07,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:07,480 INFO L87 Difference]: Start difference. First operand 1279 states and 1525 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:08,361 INFO L93 Difference]: Finished difference Result 1326 states and 1575 transitions. [2022-10-15 17:48:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:08,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:48:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:08,371 INFO L225 Difference]: With dead ends: 1326 [2022-10-15 17:48:08,371 INFO L226 Difference]: Without dead ends: 1326 [2022-10-15 17:48:08,372 INFO L412 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 [2022-10-15 17:48:08,373 INFO L413 NwaCegarLoop]: 1434 mSDtfsCounter, 49 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:08,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 2331 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 17:48:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-10-15 17:48:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1280. [2022-10-15 17:48:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 583 states have (on average 2.1475128644939967) internal successors, (1252), 1134 states have internal predecessors, (1252), 137 states have call successors, (137), 9 states have call predecessors, (137), 9 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2022-10-15 17:48:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1526 transitions. [2022-10-15 17:48:08,436 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1526 transitions. Word has length 4 [2022-10-15 17:48:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:08,437 INFO L495 AbstractCegarLoop]: Abstraction has 1280 states and 1526 transitions. [2022-10-15 17:48:08,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1526 transitions. [2022-10-15 17:48:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 17:48:08,437 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:08,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 17:48:08,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:48:08,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:08,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:08,439 INFO L85 PathProgramCache]: Analyzing trace with hash 744494950, now seen corresponding path program 1 times [2022-10-15 17:48:08,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:08,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136716275] [2022-10-15 17:48:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:08,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:08,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:08,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136716275] [2022-10-15 17:48:08,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136716275] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:08,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:08,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:08,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622043577] [2022-10-15 17:48:08,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:08,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:08,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:08,889 INFO L87 Difference]: Start difference. First operand 1280 states and 1526 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:09,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:09,809 INFO L93 Difference]: Finished difference Result 1488 states and 1726 transitions. [2022-10-15 17:48:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:09,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 [2022-10-15 17:48:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:09,819 INFO L225 Difference]: With dead ends: 1488 [2022-10-15 17:48:09,819 INFO L226 Difference]: Without dead ends: 1488 [2022-10-15 17:48:09,820 INFO L412 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 [2022-10-15 17:48:09,821 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 813 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:09,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1552 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 17:48:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-10-15 17:48:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1362. [2022-10-15 17:48:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 646 states have (on average 2.1609907120743035) internal successors, (1396), 1195 states have internal predecessors, (1396), 158 states have call successors, (158), 9 states have call predecessors, (158), 9 states have return successors, (158), 158 states have call predecessors, (158), 158 states have call successors, (158) [2022-10-15 17:48:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1712 transitions. [2022-10-15 17:48:09,874 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1712 transitions. Word has length 6 [2022-10-15 17:48:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:09,875 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1712 transitions. [2022-10-15 17:48:09,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1712 transitions. [2022-10-15 17:48:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 17:48:09,876 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:09,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 17:48:09,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:48:09,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash 744494951, now seen corresponding path program 1 times [2022-10-15 17:48:09,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:09,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691006840] [2022-10-15 17:48:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:09,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:10,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:10,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691006840] [2022-10-15 17:48:10,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691006840] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:10,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:10,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:10,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012099665] [2022-10-15 17:48:10,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:10,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:10,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:10,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:10,324 INFO L87 Difference]: Start difference. First operand 1362 states and 1712 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:11,119 INFO L93 Difference]: Finished difference Result 1406 states and 1759 transitions. [2022-10-15 17:48:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:11,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 [2022-10-15 17:48:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:11,128 INFO L225 Difference]: With dead ends: 1406 [2022-10-15 17:48:11,129 INFO L226 Difference]: Without dead ends: 1406 [2022-10-15 17:48:11,129 INFO L412 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 [2022-10-15 17:48:11,130 INFO L413 NwaCegarLoop]: 1433 mSDtfsCounter, 45 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:11,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 2328 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 17:48:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2022-10-15 17:48:11,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1364. [2022-10-15 17:48:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 648 states have (on average 2.1574074074074074) internal successors, (1398), 1197 states have internal predecessors, (1398), 158 states have call successors, (158), 9 states have call predecessors, (158), 9 states have return successors, (158), 158 states have call predecessors, (158), 158 states have call successors, (158) [2022-10-15 17:48:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1714 transitions. [2022-10-15 17:48:11,184 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1714 transitions. Word has length 6 [2022-10-15 17:48:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:11,185 INFO L495 AbstractCegarLoop]: Abstraction has 1364 states and 1714 transitions. [2022-10-15 17:48:11,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1714 transitions. [2022-10-15 17:48:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 17:48:11,186 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:11,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:11,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:48:11,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1799868793, now seen corresponding path program 1 times [2022-10-15 17:48:11,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:11,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870058661] [2022-10-15 17:48:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:11,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:11,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:11,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870058661] [2022-10-15 17:48:11,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870058661] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:11,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:11,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:11,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401919218] [2022-10-15 17:48:11,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:11,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:11,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:11,314 INFO L87 Difference]: Start difference. First operand 1364 states and 1714 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-10-15 17:48:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:12,143 INFO L93 Difference]: Finished difference Result 1495 states and 1734 transitions. [2022-10-15 17:48:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 [2022-10-15 17:48:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:12,154 INFO L225 Difference]: With dead ends: 1495 [2022-10-15 17:48:12,154 INFO L226 Difference]: Without dead ends: 1495 [2022-10-15 17:48:12,155 INFO L412 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 [2022-10-15 17:48:12,159 INFO L413 NwaCegarLoop]: 1032 mSDtfsCounter, 808 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:12,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 1558 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 17:48:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2022-10-15 17:48:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1366. [2022-10-15 17:48:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 651 states have (on average 2.153609831029186) internal successors, (1402), 1198 states have internal predecessors, (1402), 159 states have call successors, (159), 9 states have call predecessors, (159), 9 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2022-10-15 17:48:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1720 transitions. [2022-10-15 17:48:12,223 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1720 transitions. Word has length 8 [2022-10-15 17:48:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:12,223 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1720 transitions. [2022-10-15 17:48:12,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2022-10-15 17:48:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1720 transitions. [2022-10-15 17:48:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 17:48:12,225 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:12,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:12,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-15 17:48:12,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1799868792, now seen corresponding path program 1 times [2022-10-15 17:48:12,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:12,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390285721] [2022-10-15 17:48:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:12,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:12,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:12,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390285721] [2022-10-15 17:48:12,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390285721] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:12,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:12,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:12,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438974189] [2022-10-15 17:48:12,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:12,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:12,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:12,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:12,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:12,662 INFO L87 Difference]: Start difference. First operand 1366 states and 1720 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-10-15 17:48:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:13,403 INFO L93 Difference]: Finished difference Result 1406 states and 1763 transitions. [2022-10-15 17:48:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 [2022-10-15 17:48:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:13,415 INFO L225 Difference]: With dead ends: 1406 [2022-10-15 17:48:13,415 INFO L226 Difference]: Without dead ends: 1406 [2022-10-15 17:48:13,415 INFO L412 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 [2022-10-15 17:48:13,417 INFO L413 NwaCegarLoop]: 1432 mSDtfsCounter, 41 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:13,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2325 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 17:48:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2022-10-15 17:48:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1368. [2022-10-15 17:48:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 653 states have (on average 2.1500765696784074) internal successors, (1404), 1200 states have internal predecessors, (1404), 159 states have call successors, (159), 9 states have call predecessors, (159), 9 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2022-10-15 17:48:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1722 transitions. [2022-10-15 17:48:13,469 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1722 transitions. Word has length 8 [2022-10-15 17:48:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:13,469 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1722 transitions. [2022-10-15 17:48:13,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2022-10-15 17:48:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1722 transitions. [2022-10-15 17:48:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-15 17:48:13,478 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:13,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:13,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-15 17:48:13,478 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1197933032, now seen corresponding path program 1 times [2022-10-15 17:48:13,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:13,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204097700] [2022-10-15 17:48:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:13,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:13,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204097700] [2022-10-15 17:48:13,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204097700] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:13,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:13,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:13,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703415345] [2022-10-15 17:48:13,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:13,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:13,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:13,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:13,642 INFO L87 Difference]: Start difference. First operand 1368 states and 1722 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:14,681 INFO L93 Difference]: Finished difference Result 1455 states and 1695 transitions. [2022-10-15 17:48:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:14,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-15 17:48:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:14,691 INFO L225 Difference]: With dead ends: 1455 [2022-10-15 17:48:14,692 INFO L226 Difference]: Without dead ends: 1455 [2022-10-15 17:48:14,692 INFO L412 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 [2022-10-15 17:48:14,693 INFO L413 NwaCegarLoop]: 987 mSDtfsCounter, 756 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:14,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 1517 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-15 17:48:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2022-10-15 17:48:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1323. [2022-10-15 17:48:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 656 states have (on average 2.0746951219512195) internal successors, (1361), 1154 states have internal predecessors, (1361), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1681 transitions. [2022-10-15 17:48:14,744 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1681 transitions. Word has length 10 [2022-10-15 17:48:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:14,744 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 1681 transitions. [2022-10-15 17:48:14,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1681 transitions. [2022-10-15 17:48:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-15 17:48:14,745 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:14,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:14,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-15 17:48:14,746 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1197933033, now seen corresponding path program 1 times [2022-10-15 17:48:14,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:14,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23269013] [2022-10-15 17:48:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:14,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:14,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:14,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23269013] [2022-10-15 17:48:14,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23269013] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:14,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:14,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:14,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345839365] [2022-10-15 17:48:14,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:14,958 INFO L87 Difference]: Start difference. First operand 1323 states and 1681 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:15,789 INFO L93 Difference]: Finished difference Result 1354 states and 1715 transitions. [2022-10-15 17:48:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:15,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-15 17:48:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:15,799 INFO L225 Difference]: With dead ends: 1354 [2022-10-15 17:48:15,799 INFO L226 Difference]: Without dead ends: 1354 [2022-10-15 17:48:15,800 INFO L412 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 [2022-10-15 17:48:15,803 INFO L413 NwaCegarLoop]: 1386 mSDtfsCounter, 32 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:15,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 2230 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 17:48:15,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-10-15 17:48:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1329. [2022-10-15 17:48:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 662 states have (on average 2.0649546827794563) internal successors, (1367), 1160 states have internal predecessors, (1367), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1687 transitions. [2022-10-15 17:48:15,878 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1687 transitions. Word has length 10 [2022-10-15 17:48:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:15,878 INFO L495 AbstractCegarLoop]: Abstraction has 1329 states and 1687 transitions. [2022-10-15 17:48:15,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1687 transitions. [2022-10-15 17:48:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 17:48:15,879 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:15,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:15,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 17:48:15,880 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash 117796749, now seen corresponding path program 1 times [2022-10-15 17:48:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:15,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280283824] [2022-10-15 17:48:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:15,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:16,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:16,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280283824] [2022-10-15 17:48:16,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280283824] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:16,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:16,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:48:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816416918] [2022-10-15 17:48:16,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:16,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:48:16,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:48:16,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:48:16,142 INFO L87 Difference]: Start difference. First operand 1329 states and 1687 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-10-15 17:48:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:16,983 INFO L93 Difference]: Finished difference Result 1374 states and 1735 transitions. [2022-10-15 17:48:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:48:16,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-10-15 17:48:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:16,993 INFO L225 Difference]: With dead ends: 1374 [2022-10-15 17:48:16,993 INFO L226 Difference]: Without dead ends: 1374 [2022-10-15 17:48:16,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:48:16,994 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 60 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:16,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 2236 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 17:48:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-10-15 17:48:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1346. [2022-10-15 17:48:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 679 states have (on average 2.04860088365243) internal successors, (1391), 1177 states have internal predecessors, (1391), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1711 transitions. [2022-10-15 17:48:17,046 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1711 transitions. Word has length 17 [2022-10-15 17:48:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:17,046 INFO L495 AbstractCegarLoop]: Abstraction has 1346 states and 1711 transitions. [2022-10-15 17:48:17,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-10-15 17:48:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1711 transitions. [2022-10-15 17:48:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 17:48:17,048 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:17,048 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:17,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-15 17:48:17,049 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:17,050 INFO L85 PathProgramCache]: Analyzing trace with hash 566558928, now seen corresponding path program 1 times [2022-10-15 17:48:17,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:17,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655958324] [2022-10-15 17:48:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:17,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:17,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:17,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655958324] [2022-10-15 17:48:17,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655958324] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:17,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826170046] [2022-10-15 17:48:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:17,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:17,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:17,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:48:17,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 17:48:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:17,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 17:48:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:17,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:18,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-10-15 17:48:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:18,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826170046] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:18,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:18,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-10-15 17:48:18,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389080276] [2022-10-15 17:48:18,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:18,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-15 17:48:18,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-15 17:48:18,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:48:18,102 INFO L87 Difference]: Start difference. First operand 1346 states and 1711 transitions. Second operand has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:22,455 INFO L93 Difference]: Finished difference Result 2233 states and 2664 transitions. [2022-10-15 17:48:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 17:48:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-10-15 17:48:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:22,472 INFO L225 Difference]: With dead ends: 2233 [2022-10-15 17:48:22,476 INFO L226 Difference]: Without dead ends: 2233 [2022-10-15 17:48:22,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-10-15 17:48:22,478 INFO L413 NwaCegarLoop]: 1004 mSDtfsCounter, 3478 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 4002 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3599 SdHoareTripleChecker+Valid, 4707 SdHoareTripleChecker+Invalid, 4244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 4002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:22,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3599 Valid, 4707 Invalid, 4244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [242 Valid, 4002 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-10-15 17:48:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-10-15 17:48:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1400. [2022-10-15 17:48:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 734 states have (on average 1.9959128065395095) internal successors, (1465), 1231 states have internal predecessors, (1465), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1785 transitions. [2022-10-15 17:48:22,550 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1785 transitions. Word has length 21 [2022-10-15 17:48:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:22,550 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 1785 transitions. [2022-10-15 17:48:22,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:22,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1785 transitions. [2022-10-15 17:48:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 17:48:22,551 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:22,552 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:22,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 17:48:22,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-15 17:48:22,768 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:22,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1290865794, now seen corresponding path program 1 times [2022-10-15 17:48:22,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:22,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452997777] [2022-10-15 17:48:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:22,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:22,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:22,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452997777] [2022-10-15 17:48:22,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452997777] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164701447] [2022-10-15 17:48:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:22,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:22,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:22,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:48:22,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 17:48:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:23,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 17:48:23,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:23,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:23,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164701447] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:23,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:23,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-10-15 17:48:23,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504236854] [2022-10-15 17:48:23,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:23,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 17:48:23,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 17:48:23,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:48:23,284 INFO L87 Difference]: Start difference. First operand 1400 states and 1785 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 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) [2022-10-15 17:48:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:23,469 INFO L93 Difference]: Finished difference Result 1522 states and 1915 transitions. [2022-10-15 17:48:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 17:48:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 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 31 [2022-10-15 17:48:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:23,479 INFO L225 Difference]: With dead ends: 1522 [2022-10-15 17:48:23,479 INFO L226 Difference]: Without dead ends: 1522 [2022-10-15 17:48:23,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:48:23,480 INFO L413 NwaCegarLoop]: 1387 mSDtfsCounter, 131 mSDsluCounter, 5532 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 6919 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:23,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 6919 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:48:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-10-15 17:48:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1500. [2022-10-15 17:48:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 834 states have (on average 1.9124700239808154) internal successors, (1595), 1331 states have internal predecessors, (1595), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1915 transitions. [2022-10-15 17:48:23,530 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1915 transitions. Word has length 31 [2022-10-15 17:48:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:23,531 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 1915 transitions. [2022-10-15 17:48:23,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 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) [2022-10-15 17:48:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1915 transitions. [2022-10-15 17:48:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 17:48:23,533 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:23,533 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:23,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 17:48:23,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-15 17:48:23,747 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1529582191, now seen corresponding path program 2 times [2022-10-15 17:48:23,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:23,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949558130] [2022-10-15 17:48:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:23,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:24,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:24,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949558130] [2022-10-15 17:48:24,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949558130] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:24,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930094342] [2022-10-15 17:48:24,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:48:24,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:24,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:24,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:48:24,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 17:48:24,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 17:48:24,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:48:24,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-15 17:48:24,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:24,502 INFO L356 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2022-10-15 17:48:24,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 18 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 50 [2022-10-15 17:48:24,560 INFO L356 Elim1Store]: treesize reduction 73, result has 9.9 percent of original size [2022-10-15 17:48:24,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 411 treesize of output 403 [2022-10-15 17:48:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-10-15 17:48:26,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:48:26,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930094342] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:26,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:48:26,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2022-10-15 17:48:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31447703] [2022-10-15 17:48:26,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:26,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:48:26,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:48:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:48:26,708 INFO L87 Difference]: Start difference. First operand 1500 states and 1915 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2022-10-15 17:48:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:26,735 INFO L93 Difference]: Finished difference Result 1500 states and 1914 transitions. [2022-10-15 17:48:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:48:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 51 [2022-10-15 17:48:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:26,744 INFO L225 Difference]: With dead ends: 1500 [2022-10-15 17:48:26,744 INFO L226 Difference]: Without dead ends: 1500 [2022-10-15 17:48:26,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:48:26,746 INFO L413 NwaCegarLoop]: 1390 mSDtfsCounter, 1 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 568 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:26,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2233 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 568 Unchecked, 0.0s Time] [2022-10-15 17:48:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2022-10-15 17:48:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1500. [2022-10-15 17:48:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 834 states have (on average 1.9112709832134294) internal successors, (1594), 1331 states have internal predecessors, (1594), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1914 transitions. [2022-10-15 17:48:26,791 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1914 transitions. Word has length 51 [2022-10-15 17:48:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:26,792 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 1914 transitions. [2022-10-15 17:48:26,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2022-10-15 17:48:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1914 transitions. [2022-10-15 17:48:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-15 17:48:26,793 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:26,793 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:26,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 17:48:27,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:27,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:27,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1529582192, now seen corresponding path program 1 times [2022-10-15 17:48:27,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:27,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346536792] [2022-10-15 17:48:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:27,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346536792] [2022-10-15 17:48:27,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346536792] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:27,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796158192] [2022-10-15 17:48:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:27,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:27,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:48:27,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 17:48:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 17:48:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:27,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:27,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796158192] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:27,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:27,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-10-15 17:48:27,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847476952] [2022-10-15 17:48:27,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:27,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-15 17:48:27,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-15 17:48:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-10-15 17:48:27,838 INFO L87 Difference]: Start difference. First operand 1500 states and 1914 transitions. Second operand has 21 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 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) [2022-10-15 17:48:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:28,205 INFO L93 Difference]: Finished difference Result 1702 states and 2114 transitions. [2022-10-15 17:48:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-15 17:48:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 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 51 [2022-10-15 17:48:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:28,215 INFO L225 Difference]: With dead ends: 1702 [2022-10-15 17:48:28,215 INFO L226 Difference]: Without dead ends: 1702 [2022-10-15 17:48:28,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-10-15 17:48:28,216 INFO L413 NwaCegarLoop]: 1387 mSDtfsCounter, 329 mSDsluCounter, 6929 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 8316 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:28,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 8316 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:48:28,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2022-10-15 17:48:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1660. [2022-10-15 17:48:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 994 states have (on average 1.8048289738430583) internal successors, (1794), 1491 states have internal predecessors, (1794), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2114 transitions. [2022-10-15 17:48:28,264 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2114 transitions. Word has length 51 [2022-10-15 17:48:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:28,264 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 2114 transitions. [2022-10-15 17:48:28,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 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) [2022-10-15 17:48:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2114 transitions. [2022-10-15 17:48:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-15 17:48:28,266 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:28,266 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:28,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 17:48:28,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:28,480 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:28,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1170511662, now seen corresponding path program 2 times [2022-10-15 17:48:28,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:28,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701823115] [2022-10-15 17:48:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:28,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:29,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:29,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701823115] [2022-10-15 17:48:29,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701823115] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:29,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338714286] [2022-10-15 17:48:29,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:48:29,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:29,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:29,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:48:29,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 17:48:29,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 17:48:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:48:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-15 17:48:29,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:29,845 INFO L356 Elim1Store]: treesize reduction 327, result has 21.2 percent of original size [2022-10-15 17:48:29,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 100 [2022-10-15 17:48:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-10-15 17:48:30,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:48:30,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338714286] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:30,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:48:30,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [21] total 25 [2022-10-15 17:48:30,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800886393] [2022-10-15 17:48:30,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:30,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 17:48:30,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:30,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 17:48:30,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2022-10-15 17:48:30,268 INFO L87 Difference]: Start difference. First operand 1660 states and 2114 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-10-15 17:48:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:30,579 INFO L93 Difference]: Finished difference Result 1675 states and 2118 transitions. [2022-10-15 17:48:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:48:30,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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 91 [2022-10-15 17:48:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:30,589 INFO L225 Difference]: With dead ends: 1675 [2022-10-15 17:48:30,589 INFO L226 Difference]: Without dead ends: 1675 [2022-10-15 17:48:30,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2022-10-15 17:48:30,591 INFO L413 NwaCegarLoop]: 1181 mSDtfsCounter, 1242 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 656 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:30,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 2543 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 656 Unchecked, 0.3s Time] [2022-10-15 17:48:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-10-15 17:48:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1656. [2022-10-15 17:48:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 994 states have (on average 1.79476861167002) internal successors, (1784), 1487 states have internal predecessors, (1784), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2104 transitions. [2022-10-15 17:48:30,639 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2104 transitions. Word has length 91 [2022-10-15 17:48:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:30,639 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2104 transitions. [2022-10-15 17:48:30,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-10-15 17:48:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2104 transitions. [2022-10-15 17:48:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-15 17:48:30,641 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:30,641 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:30,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 17:48:30,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 17:48:30,854 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash -419700209, now seen corresponding path program 1 times [2022-10-15 17:48:30,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:30,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811161135] [2022-10-15 17:48:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:30,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:31,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811161135] [2022-10-15 17:48:31,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811161135] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:31,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153728558] [2022-10-15 17:48:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:31,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:31,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:31,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:48:31,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 17:48:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:32,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-15 17:48:32,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:32,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:32,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153728558] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:32,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:32,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-10-15 17:48:32,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228843901] [2022-10-15 17:48:32,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:32,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-15 17:48:32,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:32,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-15 17:48:32,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-10-15 17:48:32,473 INFO L87 Difference]: Start difference. First operand 1656 states and 2104 transitions. Second operand has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 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) [2022-10-15 17:48:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:32,830 INFO L93 Difference]: Finished difference Result 1732 states and 2144 transitions. [2022-10-15 17:48:32,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-15 17:48:32,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 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 93 [2022-10-15 17:48:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:32,841 INFO L225 Difference]: With dead ends: 1732 [2022-10-15 17:48:32,841 INFO L226 Difference]: Without dead ends: 1732 [2022-10-15 17:48:32,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 166 SyntacticMatches, 18 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-10-15 17:48:32,843 INFO L413 NwaCegarLoop]: 1383 mSDtfsCounter, 333 mSDsluCounter, 8289 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 9672 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:32,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 9672 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 17:48:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-10-15 17:48:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1688. [2022-10-15 17:48:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1026 states have (on average 1.7777777777777777) internal successors, (1824), 1519 states have internal predecessors, (1824), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2144 transitions. [2022-10-15 17:48:32,892 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2144 transitions. Word has length 93 [2022-10-15 17:48:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:32,892 INFO L495 AbstractCegarLoop]: Abstraction has 1688 states and 2144 transitions. [2022-10-15 17:48:32,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 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) [2022-10-15 17:48:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2144 transitions. [2022-10-15 17:48:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-15 17:48:32,894 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:32,894 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:32,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 17:48:33,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-15 17:48:33,108 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1294213653, now seen corresponding path program 2 times [2022-10-15 17:48:33,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:33,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591947667] [2022-10-15 17:48:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:33,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-10-15 17:48:34,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591947667] [2022-10-15 17:48:34,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591947667] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:34,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:34,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 17:48:34,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249050231] [2022-10-15 17:48:34,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:34,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:48:34,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:48:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:48:34,927 INFO L87 Difference]: Start difference. First operand 1688 states and 2144 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-10-15 17:48:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:35,956 INFO L93 Difference]: Finished difference Result 1712 states and 2144 transitions. [2022-10-15 17:48:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:35,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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 101 [2022-10-15 17:48:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:35,972 INFO L225 Difference]: With dead ends: 1712 [2022-10-15 17:48:35,972 INFO L226 Difference]: Without dead ends: 1712 [2022-10-15 17:48:35,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:48:35,974 INFO L413 NwaCegarLoop]: 1001 mSDtfsCounter, 2997 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3056 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:35,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3056 Valid, 1853 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-15 17:48:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-10-15 17:48:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1682. [2022-10-15 17:48:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1026 states have (on average 1.7641325536062378) internal successors, (1810), 1513 states have internal predecessors, (1810), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2130 transitions. [2022-10-15 17:48:36,020 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2130 transitions. Word has length 101 [2022-10-15 17:48:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:36,021 INFO L495 AbstractCegarLoop]: Abstraction has 1682 states and 2130 transitions. [2022-10-15 17:48:36,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-10-15 17:48:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2130 transitions. [2022-10-15 17:48:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-15 17:48:36,022 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:36,022 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-15 17:48:36,023 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:36,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1294213654, now seen corresponding path program 1 times [2022-10-15 17:48:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529994460] [2022-10-15 17:48:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-10-15 17:48:38,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:38,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529994460] [2022-10-15 17:48:38,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529994460] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:38,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:38,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 17:48:38,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759365001] [2022-10-15 17:48:38,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:38,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:48:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:38,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:48:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:48:38,445 INFO L87 Difference]: Start difference. First operand 1682 states and 2130 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-10-15 17:48:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:39,310 INFO L93 Difference]: Finished difference Result 1688 states and 2129 transitions. [2022-10-15 17:48:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:48:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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 101 [2022-10-15 17:48:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:39,331 INFO L225 Difference]: With dead ends: 1688 [2022-10-15 17:48:39,332 INFO L226 Difference]: Without dead ends: 1688 [2022-10-15 17:48:39,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:48:39,334 INFO L413 NwaCegarLoop]: 1370 mSDtfsCounter, 93 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:39,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 2214 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 17:48:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-10-15 17:48:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1682. [2022-10-15 17:48:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1026 states have (on average 1.763157894736842) internal successors, (1809), 1513 states have internal predecessors, (1809), 160 states have call successors, (160), 9 states have call predecessors, (160), 9 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-10-15 17:48:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2129 transitions. [2022-10-15 17:48:39,393 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2129 transitions. Word has length 101 [2022-10-15 17:48:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:39,394 INFO L495 AbstractCegarLoop]: Abstraction has 1682 states and 2129 transitions. [2022-10-15 17:48:39,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-10-15 17:48:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2129 transitions. [2022-10-15 17:48:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-10-15 17:48:39,395 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:39,395 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:39,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-15 17:48:39,395 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, emptyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 554 more)] === [2022-10-15 17:48:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -53503015, now seen corresponding path program 1 times [2022-10-15 17:48:39,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:39,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083299979] [2022-10-15 17:48:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:39,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-10-15 17:48:42,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:42,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083299979] [2022-10-15 17:48:42,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083299979] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:42,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088377509] [2022-10-15 17:48:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:42,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:42,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:42,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:48:42,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 17:48:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 56 conjunts are in the unsatisfiable core [2022-10-15 17:48:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:42,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:42,814 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-10-15 17:48:42,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 19 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 44 [2022-10-15 17:48:42,849 INFO L356 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-10-15 17:48:42,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 92 [2022-10-15 17:48:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-10-15 17:48:43,463 INFO L328 TraceCheckSpWp]: Computing backward predicates...