/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 config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:14:24,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:14:24,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:14:24,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 16:14:24,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:14:24,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:14:24,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:14:24,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:14:24,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:14:24,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:14:24,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:14:24,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:14:24,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:14:24,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:14:24,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:14:24,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:14:24,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:14:24,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 16:14:24,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 16:14:24,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 16:14:24,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 16:14:24,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 16:14:24,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 16:14:24,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 16:14:24,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 16:14:24,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:14:24,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:14:24,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:14:24,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:14:24,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:14:24,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:14:24,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:14:24,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:14:24,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:14:24,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:14:24,784 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:14:24,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:14:24,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:14:24,784 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:14:24,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:14:24,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:14:24,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:14:24,785 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:14:24,785 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:14:24,786 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:14:24,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:14:24,786 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:14:24,786 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:14:24,787 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:14:24,787 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:14:24,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:14:24,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:14:24,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:14:24,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:14:24,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:14:24,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:14:24,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:14:24,789 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:14:24,789 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:14:24,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:14:24,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:14:24,790 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:14:25,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:14:25,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:14:25,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:14:25,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:14:25,301 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:14:25,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2021-10-07 16:14:25,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9463dab20/4437f9b979254aa1ba320a078e1dd2b2/FLAG1fd544371 [2021-10-07 16:14:26,065 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:14:26,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2021-10-07 16:14:26,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9463dab20/4437f9b979254aa1ba320a078e1dd2b2/FLAG1fd544371 [2021-10-07 16:14:26,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9463dab20/4437f9b979254aa1ba320a078e1dd2b2 [2021-10-07 16:14:26,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:14:26,401 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:14:26,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:14:26,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:14:26,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:14:26,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:26,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366aea2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26, skipping insertion in model container [2021-10-07 16:14:26,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:26,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:14:26,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:14:26,755 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2541,2554] [2021-10-07 16:14:26,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:14:26,794 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:14:26,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:14:26,841 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2541,2554] [2021-10-07 16:14:26,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:14:26,866 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:14:26,920 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2541,2554] [2021-10-07 16:14:26,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:14:26,944 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:14:26,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26 WrapperNode [2021-10-07 16:14:26,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:14:26,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:14:26,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:14:26,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:14:26,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:26,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:26,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:14:26,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:14:26,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:14:26,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:14:27,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:27,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:27,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:27,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:27,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:27,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:27,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:27,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:14:27,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:14:27,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:14:27,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:14:27,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (1/1) ... [2021-10-07 16:14:27,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:14:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:14:27,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 16:14:27,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 16:14:27,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:14:27,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:14:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:14:27,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:14:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:14:27,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:14:27,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:14:27,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:14:27,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 16:14:27,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 16:14:27,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:14:27,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:14:27,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:14:27,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:14:27,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:14:27,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:14:27,204 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:14:28,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:14:28,407 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-07 16:14:28,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:14:28 BoogieIcfgContainer [2021-10-07 16:14:28,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:14:28,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:14:28,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:14:28,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:14:28,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:14:26" (1/3) ... [2021-10-07 16:14:28,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68850921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:14:28, skipping insertion in model container [2021-10-07 16:14:28,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:14:26" (2/3) ... [2021-10-07 16:14:28,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68850921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:14:28, skipping insertion in model container [2021-10-07 16:14:28,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:14:28" (3/3) ... [2021-10-07 16:14:28,419 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2021-10-07 16:14:28,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:14:28,425 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-07 16:14:28,425 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:14:28,481 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,481 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,482 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,482 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,482 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,482 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,482 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,483 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,484 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,485 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,486 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,486 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,487 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,487 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,487 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,487 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,488 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,488 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,488 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,489 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,489 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,489 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,489 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,490 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,491 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,491 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,491 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,491 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,491 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,492 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,492 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,492 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,492 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,497 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,497 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,498 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,498 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,499 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,499 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,499 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,499 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,500 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,500 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,501 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,501 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,501 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,501 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,502 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,503 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,503 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,503 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,503 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,503 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,503 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,504 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,504 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,504 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,504 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,505 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,505 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,505 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,506 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,506 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,506 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,506 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,506 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,507 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,507 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,507 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,507 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,508 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,508 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,508 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,508 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,508 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,510 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,510 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,511 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,512 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,515 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,520 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,521 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,521 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,522 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,522 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,522 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,522 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,523 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,523 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,523 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,524 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,527 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,528 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,528 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,528 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,528 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,528 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,531 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,531 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,531 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,531 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,531 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,532 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,533 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,534 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,534 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,534 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,534 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,534 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:14:28,541 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:14:28,593 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:14:28,600 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 16:14:28,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-07 16:14:28,623 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:14:28,652 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 166 transitions, 356 flow [2021-10-07 16:14:28,655 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 166 transitions, 356 flow [2021-10-07 16:14:28,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 166 transitions, 356 flow [2021-10-07 16:14:28,751 INFO L129 PetriNetUnfolder]: 12/163 cut-off events. [2021-10-07 16:14:28,751 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:14:28,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 163 events. 12/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2021-10-07 16:14:28,768 INFO L116 LiptonReduction]: Number of co-enabled transitions 2688 [2021-10-07 16:14:52,424 INFO L131 LiptonReduction]: Checked pairs total: 3376 [2021-10-07 16:14:52,425 INFO L133 LiptonReduction]: Total number of compositions: 166 [2021-10-07 16:14:52,437 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2021-10-07 16:14:52,556 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 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) [2021-10-07 16:14:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 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) [2021-10-07 16:14:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:14:52,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:52,572 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:14:52,573 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:52,580 INFO L82 PathProgramCache]: Analyzing trace with hash 21981, now seen corresponding path program 1 times [2021-10-07 16:14:52,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:52,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105338529] [2021-10-07 16:14:52,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:52,597 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:52,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:52,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:14:52,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:14:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:52,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:14:52,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:52,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:53,255 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:53,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:14:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:53,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:53,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:53,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105338529] [2021-10-07 16:14:53,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105338529] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:53,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:53,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:14:53,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286501307] [2021-10-07 16:14:53,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:53,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:53,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:53,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:53,601 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:54,187 INFO L93 Difference]: Finished difference Result 1498 states and 5133 transitions. [2021-10-07 16:14:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:14:54,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:14:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:54,228 INFO L225 Difference]: With dead ends: 1498 [2021-10-07 16:14:54,228 INFO L226 Difference]: Without dead ends: 1498 [2021-10-07 16:14:54,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-10-07 16:14:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 751. [2021-10-07 16:14:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 618 states have (on average 4.166666666666667) internal successors, (2575), 750 states have internal predecessors, (2575), 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) [2021-10-07 16:14:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2575 transitions. [2021-10-07 16:14:54,406 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2575 transitions. Word has length 2 [2021-10-07 16:14:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:54,407 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2575 transitions. [2021-10-07 16:14:54,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2575 transitions. [2021-10-07 16:14:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:14:54,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:54,408 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:14:54,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-07 16:14:54,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:14:54,622 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:54,624 INFO L82 PathProgramCache]: Analyzing trace with hash 22070, now seen corresponding path program 1 times [2021-10-07 16:14:54,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:54,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385442123] [2021-10-07 16:14:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:54,626 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:54,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:54,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:14:54,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:14:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:54,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:14:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:54,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:54,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:54,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385442123] [2021-10-07 16:14:54,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385442123] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:54,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:54,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:14:54,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392946023] [2021-10-07 16:14:54,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:54,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:54,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:54,788 INFO L87 Difference]: Start difference. First operand 751 states and 2575 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:54,922 INFO L93 Difference]: Finished difference Result 752 states and 2572 transitions. [2021-10-07 16:14:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:14:54,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:14:54,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:54,934 INFO L225 Difference]: With dead ends: 752 [2021-10-07 16:14:54,934 INFO L226 Difference]: Without dead ends: 752 [2021-10-07 16:14:54,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-10-07 16:14:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 751. [2021-10-07 16:14:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 618 states have (on average 4.1618122977346275) internal successors, (2572), 750 states have internal predecessors, (2572), 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) [2021-10-07 16:14:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2572 transitions. [2021-10-07 16:14:54,976 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2572 transitions. Word has length 2 [2021-10-07 16:14:54,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:54,976 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2572 transitions. [2021-10-07 16:14:54,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2572 transitions. [2021-10-07 16:14:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:14:54,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:54,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:14:54,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:14:55,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:14:55,191 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash 21979, now seen corresponding path program 1 times [2021-10-07 16:14:55,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:55,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029420150] [2021-10-07 16:14:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:55,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:55,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:55,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:14:55,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:14:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:55,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:14:55,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:55,311 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:14:55,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 16:14:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:55,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:55,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:55,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029420150] [2021-10-07 16:14:55,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029420150] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:55,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:55,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:14:55,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190811128] [2021-10-07 16:14:55,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:14:55,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:14:55,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:14:55,359 INFO L87 Difference]: Start difference. First operand 751 states and 2572 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:55,492 INFO L93 Difference]: Finished difference Result 750 states and 2569 transitions. [2021-10-07 16:14:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:14:55,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:14:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:55,501 INFO L225 Difference]: With dead ends: 750 [2021-10-07 16:14:55,501 INFO L226 Difference]: Without dead ends: 750 [2021-10-07 16:14:55,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:14:55,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-10-07 16:14:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2021-10-07 16:14:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 618 states have (on average 4.156957928802589) internal successors, (2569), 749 states have internal predecessors, (2569), 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) [2021-10-07 16:14:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2569 transitions. [2021-10-07 16:14:55,540 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2569 transitions. Word has length 2 [2021-10-07 16:14:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:55,540 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2569 transitions. [2021-10-07 16:14:55,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2569 transitions. [2021-10-07 16:14:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:14:55,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:55,541 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:14:55,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:14:55,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:14:55,754 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:55,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:55,755 INFO L82 PathProgramCache]: Analyzing trace with hash 684478, now seen corresponding path program 1 times [2021-10-07 16:14:55,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:55,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520104536] [2021-10-07 16:14:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:55,757 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:55,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:55,758 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:14:55,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:14:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:55,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:14:55,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:55,918 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-07 16:14:55,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 56 [2021-10-07 16:14:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:56,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:14:56,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:56,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520104536] [2021-10-07 16:14:56,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520104536] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:14:56,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:14:56,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:14:56,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61339176] [2021-10-07 16:14:56,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:14:56,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:14:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:56,144 INFO L87 Difference]: Start difference. First operand 750 states and 2569 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:14:56,300 INFO L93 Difference]: Finished difference Result 624 states and 2067 transitions. [2021-10-07 16:14:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:14:56,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 16:14:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:14:56,308 INFO L225 Difference]: With dead ends: 624 [2021-10-07 16:14:56,308 INFO L226 Difference]: Without dead ends: 624 [2021-10-07 16:14:56,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:14:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-10-07 16:14:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2021-10-07 16:14:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 520 states have (on average 3.975) internal successors, (2067), 623 states have internal predecessors, (2067), 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) [2021-10-07 16:14:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2067 transitions. [2021-10-07 16:14:56,339 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2067 transitions. Word has length 3 [2021-10-07 16:14:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:14:56,340 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2067 transitions. [2021-10-07 16:14:56,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:14:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2067 transitions. [2021-10-07 16:14:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:14:56,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:14:56,341 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:14:56,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 16:14:56,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:14:56,555 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:14:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:14:56,556 INFO L82 PathProgramCache]: Analyzing trace with hash 684479, now seen corresponding path program 1 times [2021-10-07 16:14:56,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:14:56,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600995683] [2021-10-07 16:14:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:14:56,558 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:14:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:14:56,559 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:14:56,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:14:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:14:56,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 16:14:56,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:14:56,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:14:57,039 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:14:57,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 101 [2021-10-07 16:14:57,053 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 16:14:57,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 100 [2021-10-07 16:14:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:59,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:14:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:14:59,374 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:14:59,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600995683] [2021-10-07 16:14:59,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600995683] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:14:59,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:14:59,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-07 16:14:59,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457121344] [2021-10-07 16:14:59,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:14:59,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:14:59,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:14:59,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:14:59,376 INFO L87 Difference]: Start difference. First operand 624 states and 2067 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2021-10-07 16:15:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:00,238 INFO L93 Difference]: Finished difference Result 1120 states and 3630 transitions. [2021-10-07 16:15:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:15:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 3 [2021-10-07 16:15:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:00,253 INFO L225 Difference]: With dead ends: 1120 [2021-10-07 16:15:00,253 INFO L226 Difference]: Without dead ends: 1120 [2021-10-07 16:15:00,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 428.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:15:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-10-07 16:15:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 812. [2021-10-07 16:15:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 708 states have (on average 3.959039548022599) internal successors, (2803), 811 states have internal predecessors, (2803), 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) [2021-10-07 16:15:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2803 transitions. [2021-10-07 16:15:00,296 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2803 transitions. Word has length 3 [2021-10-07 16:15:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:00,296 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 2803 transitions. [2021-10-07 16:15:00,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2021-10-07 16:15:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2803 transitions. [2021-10-07 16:15:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:15:00,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:00,297 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:15:00,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-07 16:15:00,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:00,511 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:00,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:00,511 INFO L82 PathProgramCache]: Analyzing trace with hash 21219037, now seen corresponding path program 1 times [2021-10-07 16:15:00,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:00,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591620250] [2021-10-07 16:15:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:00,514 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:00,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:00,515 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:00,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:15:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:15:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:00,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:00,908 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:00,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:01,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:01,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:01,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591620250] [2021-10-07 16:15:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591620250] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:01,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:01,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:15:01,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120622325] [2021-10-07 16:15:01,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:15:01,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:15:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:15:01,648 INFO L87 Difference]: Start difference. First operand 812 states and 2803 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-10-07 16:15:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:03,624 INFO L93 Difference]: Finished difference Result 2976 states and 9808 transitions. [2021-10-07 16:15:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:15:03,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 4 [2021-10-07 16:15:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:03,658 INFO L225 Difference]: With dead ends: 2976 [2021-10-07 16:15:03,658 INFO L226 Difference]: Without dead ends: 2976 [2021-10-07 16:15:03,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 921.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-10-07 16:15:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 814. [2021-10-07 16:15:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 710 states have (on average 3.953521126760563) internal successors, (2807), 813 states have internal predecessors, (2807), 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) [2021-10-07 16:15:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2807 transitions. [2021-10-07 16:15:03,729 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2807 transitions. Word has length 4 [2021-10-07 16:15:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:03,729 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 2807 transitions. [2021-10-07 16:15:03,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-10-07 16:15:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2807 transitions. [2021-10-07 16:15:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:15:03,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:03,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:15:03,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:03,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:03,945 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:03,946 INFO L82 PathProgramCache]: Analyzing trace with hash 657801017, now seen corresponding path program 1 times [2021-10-07 16:15:03,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:03,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625992060] [2021-10-07 16:15:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:03,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:03,948 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:03,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:15:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:15:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:04,121 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:15:04,122 INFO L388 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 4 case distinctions, treesize of input 33 treesize of output 45 [2021-10-07 16:15:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:04,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:04,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:04,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625992060] [2021-10-07 16:15:04,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625992060] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:04,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:04,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:15:04,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953833248] [2021-10-07 16:15:04,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:15:04,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:04,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:15:04,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:04,389 INFO L87 Difference]: Start difference. First operand 814 states and 2807 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2021-10-07 16:15:04,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:04,495 INFO L93 Difference]: Finished difference Result 784 states and 2717 transitions. [2021-10-07 16:15:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:15:04,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 5 [2021-10-07 16:15:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:04,504 INFO L225 Difference]: With dead ends: 784 [2021-10-07 16:15:04,504 INFO L226 Difference]: Without dead ends: 784 [2021-10-07 16:15:04,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:04,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-10-07 16:15:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2021-10-07 16:15:04,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 692 states have (on average 3.9263005780346822) internal successors, (2717), 783 states have internal predecessors, (2717), 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) [2021-10-07 16:15:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2717 transitions. [2021-10-07 16:15:04,537 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2717 transitions. Word has length 5 [2021-10-07 16:15:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:04,538 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2717 transitions. [2021-10-07 16:15:04,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2021-10-07 16:15:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2717 transitions. [2021-10-07 16:15:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:15:04,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:04,539 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:15:04,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:04,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:04,751 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash 657801018, now seen corresponding path program 1 times [2021-10-07 16:15:04,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:04,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834189305] [2021-10-07 16:15:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:04,753 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:04,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:04,754 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:04,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:15:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:04,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:15:04,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:05,158 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:05,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-07 16:15:05,165 INFO L388 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 91 treesize of output 89 [2021-10-07 16:15:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:07,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:07,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:07,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834189305] [2021-10-07 16:15:07,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834189305] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:07,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:07,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:15:07,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963511510] [2021-10-07 16:15:07,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:15:07,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:15:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:15:07,961 INFO L87 Difference]: Start difference. First operand 784 states and 2717 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2021-10-07 16:15:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:08,637 INFO L93 Difference]: Finished difference Result 1001 states and 3294 transitions. [2021-10-07 16:15:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:15:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 5 [2021-10-07 16:15:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:08,651 INFO L225 Difference]: With dead ends: 1001 [2021-10-07 16:15:08,651 INFO L226 Difference]: Without dead ends: 1001 [2021-10-07 16:15:08,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-10-07 16:15:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 754. [2021-10-07 16:15:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 674 states have (on average 3.897626112759644) internal successors, (2627), 753 states have internal predecessors, (2627), 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) [2021-10-07 16:15:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2627 transitions. [2021-10-07 16:15:08,685 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2627 transitions. Word has length 5 [2021-10-07 16:15:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:08,686 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2627 transitions. [2021-10-07 16:15:08,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2021-10-07 16:15:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2627 transitions. [2021-10-07 16:15:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:15:08,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:08,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:15:08,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-07 16:15:08,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:08,904 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:08,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1083010466, now seen corresponding path program 1 times [2021-10-07 16:15:08,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:08,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110099274] [2021-10-07 16:15:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:08,905 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:08,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:08,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:08,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:15:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:15:08,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:09,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:09,335 INFO L388 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 25 treesize of output 21 [2021-10-07 16:15:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:09,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:09,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110099274] [2021-10-07 16:15:09,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110099274] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:09,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:09,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:09,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4613796] [2021-10-07 16:15:09,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:09,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:09,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:09,434 INFO L87 Difference]: Start difference. First operand 754 states and 2627 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:10,258 INFO L93 Difference]: Finished difference Result 1652 states and 5412 transitions. [2021-10-07 16:15:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:15:10,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:15:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:10,274 INFO L225 Difference]: With dead ends: 1652 [2021-10-07 16:15:10,275 INFO L226 Difference]: Without dead ends: 1652 [2021-10-07 16:15:10,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:15:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-10-07 16:15:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 888. [2021-10-07 16:15:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 808 states have (on average 4.180693069306931) internal successors, (3378), 887 states have internal predecessors, (3378), 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) [2021-10-07 16:15:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3378 transitions. [2021-10-07 16:15:10,322 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3378 transitions. Word has length 6 [2021-10-07 16:15:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:10,322 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 3378 transitions. [2021-10-07 16:15:10,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3378 transitions. [2021-10-07 16:15:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:15:10,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:10,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:15:10,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:10,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:10,536 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:10,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:10,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1083010462, now seen corresponding path program 1 times [2021-10-07 16:15:10,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:10,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386114297] [2021-10-07 16:15:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:10,538 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:10,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:10,540 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:10,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 16:15:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:10,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:15:10,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:10,682 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:15:10,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 16:15:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:10,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:10,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:10,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386114297] [2021-10-07 16:15:10,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386114297] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:10,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:10,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:15:10,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448275314] [2021-10-07 16:15:10,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:15:10,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:15:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:10,749 INFO L87 Difference]: Start difference. First operand 888 states and 3378 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:10,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:10,877 INFO L93 Difference]: Finished difference Result 522 states and 1882 transitions. [2021-10-07 16:15:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:15:10,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:15:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:10,883 INFO L225 Difference]: With dead ends: 522 [2021-10-07 16:15:10,883 INFO L226 Difference]: Without dead ends: 522 [2021-10-07 16:15:10,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:15:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-10-07 16:15:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-10-07 16:15:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 492 states have (on average 3.8252032520325203) internal successors, (1882), 521 states have internal predecessors, (1882), 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) [2021-10-07 16:15:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1882 transitions. [2021-10-07 16:15:10,903 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1882 transitions. Word has length 6 [2021-10-07 16:15:10,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:10,903 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1882 transitions. [2021-10-07 16:15:10,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1882 transitions. [2021-10-07 16:15:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:15:10,904 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:10,904 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1] [2021-10-07 16:15:10,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:11,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:11,117 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:11,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1083246537, now seen corresponding path program 2 times [2021-10-07 16:15:11,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:11,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461122182] [2021-10-07 16:15:11,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:15:11,119 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:11,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:11,120 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:11,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 16:15:11,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:15:11,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:11,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 16:15:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:11,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:11,498 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:11,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 101 [2021-10-07 16:15:11,509 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 16:15:11,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 100 [2021-10-07 16:15:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:15:15,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:15:15,848 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:15,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461122182] [2021-10-07 16:15:15,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461122182] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:15,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:15,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:15:15,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112454303] [2021-10-07 16:15:15,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:15:15,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:15:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:15,850 INFO L87 Difference]: Start difference. First operand 522 states and 1882 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:16,109 INFO L93 Difference]: Finished difference Result 521 states and 1879 transitions. [2021-10-07 16:15:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:15:16,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:15:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:16,116 INFO L225 Difference]: With dead ends: 521 [2021-10-07 16:15:16,116 INFO L226 Difference]: Without dead ends: 521 [2021-10-07 16:15:16,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:15:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-10-07 16:15:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2021-10-07 16:15:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 492 states have (on average 3.819105691056911) internal successors, (1879), 520 states have internal predecessors, (1879), 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) [2021-10-07 16:15:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1879 transitions. [2021-10-07 16:15:16,134 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1879 transitions. Word has length 6 [2021-10-07 16:15:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:16,135 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 1879 transitions. [2021-10-07 16:15:16,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1879 transitions. [2021-10-07 16:15:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:15:16,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:16,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:16,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:16,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:16,349 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:16,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:16,350 INFO L82 PathProgramCache]: Analyzing trace with hash 786416748, now seen corresponding path program 1 times [2021-10-07 16:15:16,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:16,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392805646] [2021-10-07 16:15:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:16,352 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:16,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:16,353 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:16,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 16:15:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:16,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:15:16,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:16,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:16,715 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:16,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:16,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:17,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:17,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392805646] [2021-10-07 16:15:17,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392805646] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:17,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:17,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:17,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368381635] [2021-10-07 16:15:17,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:17,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:17,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:17,410 INFO L87 Difference]: Start difference. First operand 521 states and 1879 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:18,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:18,562 INFO L93 Difference]: Finished difference Result 939 states and 3413 transitions. [2021-10-07 16:15:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:15:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:15:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:18,572 INFO L225 Difference]: With dead ends: 939 [2021-10-07 16:15:18,572 INFO L226 Difference]: Without dead ends: 939 [2021-10-07 16:15:18,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 801.6ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:15:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-10-07 16:15:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 797. [2021-10-07 16:15:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 768 states have (on average 3.9674479166666665) internal successors, (3047), 796 states have internal predecessors, (3047), 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) [2021-10-07 16:15:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 3047 transitions. [2021-10-07 16:15:18,602 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 3047 transitions. Word has length 7 [2021-10-07 16:15:18,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:18,603 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 3047 transitions. [2021-10-07 16:15:18,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 3047 transitions. [2021-10-07 16:15:18,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:15:18,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:18,604 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:18,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:18,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:18,817 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:18,817 INFO L82 PathProgramCache]: Analyzing trace with hash 786599717, now seen corresponding path program 1 times [2021-10-07 16:15:18,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:18,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436587736] [2021-10-07 16:15:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:18,819 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:18,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:18,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:18,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 16:15:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:18,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:15:18,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:18,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:19,215 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:19,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:19,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:19,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:19,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436587736] [2021-10-07 16:15:19,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436587736] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:19,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:19,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:15:19,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490027255] [2021-10-07 16:15:19,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:15:19,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:19,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:15:19,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:15:19,699 INFO L87 Difference]: Start difference. First operand 797 states and 3047 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:20,127 INFO L93 Difference]: Finished difference Result 967 states and 3529 transitions. [2021-10-07 16:15:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:15:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:15:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:20,142 INFO L225 Difference]: With dead ends: 967 [2021-10-07 16:15:20,143 INFO L226 Difference]: Without dead ends: 967 [2021-10-07 16:15:20,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-10-07 16:15:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 761. [2021-10-07 16:15:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 738 states have (on average 3.9281842818428183) internal successors, (2899), 760 states have internal predecessors, (2899), 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) [2021-10-07 16:15:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2899 transitions. [2021-10-07 16:15:20,223 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2899 transitions. Word has length 7 [2021-10-07 16:15:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:20,224 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2899 transitions. [2021-10-07 16:15:20,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2899 transitions. [2021-10-07 16:15:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:15:20,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:20,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:20,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:20,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:20,426 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:20,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:20,427 INFO L82 PathProgramCache]: Analyzing trace with hash 786599718, now seen corresponding path program 1 times [2021-10-07 16:15:20,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:20,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441321795] [2021-10-07 16:15:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:20,429 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:20,430 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:20,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 16:15:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:20,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:15:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:20,626 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:15:20,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 16:15:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:20,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:20,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:20,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441321795] [2021-10-07 16:15:20,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441321795] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:20,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:20,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:15:20,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775997827] [2021-10-07 16:15:20,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:15:20,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:20,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:15:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:15:20,686 INFO L87 Difference]: Start difference. First operand 761 states and 2899 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-07 16:15:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:20,759 INFO L93 Difference]: Finished difference Result 725 states and 2751 transitions. [2021-10-07 16:15:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:15:20,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-10-07 16:15:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:20,764 INFO L225 Difference]: With dead ends: 725 [2021-10-07 16:15:20,764 INFO L226 Difference]: Without dead ends: 725 [2021-10-07 16:15:20,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:15:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-10-07 16:15:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 725. [2021-10-07 16:15:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 708 states have (on average 3.885593220338983) internal successors, (2751), 724 states have internal predecessors, (2751), 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) [2021-10-07 16:15:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 2751 transitions. [2021-10-07 16:15:20,787 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 2751 transitions. Word has length 7 [2021-10-07 16:15:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:20,788 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 2751 transitions. [2021-10-07 16:15:20,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-07 16:15:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 2751 transitions. [2021-10-07 16:15:20,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:15:20,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:20,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:20,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:21,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:21,003 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:21,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1385217441, now seen corresponding path program 1 times [2021-10-07 16:15:21,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:21,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669971540] [2021-10-07 16:15:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:21,005 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:21,007 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:21,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 16:15:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:21,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:15:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:21,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:21,514 INFO L388 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 25 treesize of output 21 [2021-10-07 16:15:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:21,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:21,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669971540] [2021-10-07 16:15:21,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669971540] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:21,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:21,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:21,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436098132] [2021-10-07 16:15:21,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:21,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:21,600 INFO L87 Difference]: Start difference. First operand 725 states and 2751 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2021-10-07 16:15:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:22,231 INFO L93 Difference]: Finished difference Result 1331 states and 4917 transitions. [2021-10-07 16:15:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:15:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 [2021-10-07 16:15:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:22,237 INFO L225 Difference]: With dead ends: 1331 [2021-10-07 16:15:22,237 INFO L226 Difference]: Without dead ends: 1331 [2021-10-07 16:15:22,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:15:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-10-07 16:15:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 893. [2021-10-07 16:15:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 876 states have (on average 4.085616438356165) internal successors, (3579), 892 states have internal predecessors, (3579), 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) [2021-10-07 16:15:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3579 transitions. [2021-10-07 16:15:22,273 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3579 transitions. Word has length 8 [2021-10-07 16:15:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:22,274 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 3579 transitions. [2021-10-07 16:15:22,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2021-10-07 16:15:22,274 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3579 transitions. [2021-10-07 16:15:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:15:22,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:22,275 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 16:15:22,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:22,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:22,487 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:22,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1617827619, now seen corresponding path program 2 times [2021-10-07 16:15:22,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:22,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174757257] [2021-10-07 16:15:22,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:15:22,490 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:22,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:22,491 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:22,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 16:15:22,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:15:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 16:15:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:22,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:22,923 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:22,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:23,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:25,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:25,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174757257] [2021-10-07 16:15:25,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174757257] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:25,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:25,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:15:25,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161160193] [2021-10-07 16:15:25,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:15:25,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:25,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:15:25,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:15:25,053 INFO L87 Difference]: Start difference. First operand 893 states and 3579 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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) [2021-10-07 16:15:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:32,479 INFO L93 Difference]: Finished difference Result 8008 states and 31890 transitions. [2021-10-07 16:15:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:15:32,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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 [2021-10-07 16:15:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:32,532 INFO L225 Difference]: With dead ends: 8008 [2021-10-07 16:15:32,532 INFO L226 Difference]: Without dead ends: 8008 [2021-10-07 16:15:32,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5393.1ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:15:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2021-10-07 16:15:32,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 901. [2021-10-07 16:15:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 884 states have (on average 4.066742081447964) internal successors, (3595), 900 states have internal predecessors, (3595), 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) [2021-10-07 16:15:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3595 transitions. [2021-10-07 16:15:32,753 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3595 transitions. Word has length 8 [2021-10-07 16:15:32,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:32,753 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 3595 transitions. [2021-10-07 16:15:32,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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) [2021-10-07 16:15:32,753 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3595 transitions. [2021-10-07 16:15:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:15:32,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:32,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:32,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-07 16:15:32,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:32,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash 7937131, now seen corresponding path program 1 times [2021-10-07 16:15:32,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:32,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770121219] [2021-10-07 16:15:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:32,973 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:32,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:32,974 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:32,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 16:15:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:33,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:15:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:33,383 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:33,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:33,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:15:34,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:34,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770121219] [2021-10-07 16:15:34,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770121219] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:34,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:34,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:34,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909811013] [2021-10-07 16:15:34,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:34,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:34,151 INFO L87 Difference]: Start difference. First operand 901 states and 3595 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:35,558 INFO L93 Difference]: Finished difference Result 1939 states and 7609 transitions. [2021-10-07 16:15:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:15:35,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 16:15:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:35,570 INFO L225 Difference]: With dead ends: 1939 [2021-10-07 16:15:35,571 INFO L226 Difference]: Without dead ends: 1939 [2021-10-07 16:15:35,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 869.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:15:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-10-07 16:15:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1405. [2021-10-07 16:15:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1388 states have (on average 4.379682997118156) internal successors, (6079), 1404 states have internal predecessors, (6079), 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) [2021-10-07 16:15:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 6079 transitions. [2021-10-07 16:15:35,628 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 6079 transitions. Word has length 9 [2021-10-07 16:15:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:35,629 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 6079 transitions. [2021-10-07 16:15:35,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 6079 transitions. [2021-10-07 16:15:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:15:35,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:35,630 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:35,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:35,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:35,844 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash -902453794, now seen corresponding path program 2 times [2021-10-07 16:15:35,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:35,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339711054] [2021-10-07 16:15:35,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:15:35,845 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:35,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:35,847 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:35,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 16:15:36,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:15:36,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:36,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:15:36,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:36,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:36,319 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:36,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:36,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:38,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:38,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339711054] [2021-10-07 16:15:38,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339711054] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:38,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:38,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:15:38,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216976679] [2021-10-07 16:15:38,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:15:38,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:15:38,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:15:38,091 INFO L87 Difference]: Start difference. First operand 1405 states and 6079 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-10-07 16:15:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:47,596 INFO L93 Difference]: Finished difference Result 3072 states and 12324 transitions. [2021-10-07 16:15:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:15:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 [2021-10-07 16:15:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:47,614 INFO L225 Difference]: With dead ends: 3072 [2021-10-07 16:15:47,615 INFO L226 Difference]: Without dead ends: 3072 [2021-10-07 16:15:47,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4737.9ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:15:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-10-07 16:15:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1644. [2021-10-07 16:15:47,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1627 states have (on average 4.237246465888138) internal successors, (6894), 1643 states have internal predecessors, (6894), 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) [2021-10-07 16:15:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 6894 transitions. [2021-10-07 16:15:47,701 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 6894 transitions. Word has length 10 [2021-10-07 16:15:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:47,701 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 6894 transitions. [2021-10-07 16:15:47,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-10-07 16:15:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 6894 transitions. [2021-10-07 16:15:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:15:47,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:47,702 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:47,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:47,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:47,917 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 251057517, now seen corresponding path program 1 times [2021-10-07 16:15:47,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:47,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687648651] [2021-10-07 16:15:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:47,918 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:47,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:47,920 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:47,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 16:15:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:15:48,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:48,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:48,343 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:48,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:48,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:49,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:49,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687648651] [2021-10-07 16:15:49,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687648651] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:49,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:49,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:15:49,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934229267] [2021-10-07 16:15:49,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:15:49,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:49,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:15:49,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:15:49,635 INFO L87 Difference]: Start difference. First operand 1644 states and 6894 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2021-10-07 16:15:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:53,749 INFO L93 Difference]: Finished difference Result 3060 states and 12974 transitions. [2021-10-07 16:15:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:15:53,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 [2021-10-07 16:15:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:53,764 INFO L225 Difference]: With dead ends: 3060 [2021-10-07 16:15:53,764 INFO L226 Difference]: Without dead ends: 3060 [2021-10-07 16:15:53,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2036.1ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:15:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2021-10-07 16:15:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 2256. [2021-10-07 16:15:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2239 states have (on average 4.336757481018312) internal successors, (9710), 2255 states have internal predecessors, (9710), 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) [2021-10-07 16:15:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 9710 transitions. [2021-10-07 16:15:53,889 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 9710 transitions. Word has length 10 [2021-10-07 16:15:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:53,890 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 9710 transitions. [2021-10-07 16:15:53,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2021-10-07 16:15:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 9710 transitions. [2021-10-07 16:15:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:15:53,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:53,891 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:53,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:54,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:54,105 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1332941001, now seen corresponding path program 1 times [2021-10-07 16:15:54,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:54,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959395869] [2021-10-07 16:15:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:54,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:54,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:54,107 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:54,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 16:15:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:15:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:15:54,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:54,427 INFO L388 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 8 treesize of output 6 [2021-10-07 16:15:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:15:54,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:54,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959395869] [2021-10-07 16:15:54,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959395869] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:15:54,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:15:54,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 16:15:54,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558089793] [2021-10-07 16:15:54,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:15:54,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:15:54,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:15:54,456 INFO L87 Difference]: Start difference. First operand 2256 states and 9710 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:54,569 INFO L93 Difference]: Finished difference Result 1784 states and 7330 transitions. [2021-10-07 16:15:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:15:54,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:15:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:54,575 INFO L225 Difference]: With dead ends: 1784 [2021-10-07 16:15:54,575 INFO L226 Difference]: Without dead ends: 1784 [2021-10-07 16:15:54,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:15:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-10-07 16:15:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1760. [2021-10-07 16:15:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1751 states have (on average 4.138206739006282) internal successors, (7246), 1759 states have internal predecessors, (7246), 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) [2021-10-07 16:15:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 7246 transitions. [2021-10-07 16:15:54,631 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 7246 transitions. Word has length 10 [2021-10-07 16:15:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:54,632 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 7246 transitions. [2021-10-07 16:15:54,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 7246 transitions. [2021-10-07 16:15:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:15:54,633 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:54,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:54,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:54,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:54,847 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash -807148912, now seen corresponding path program 1 times [2021-10-07 16:15:54,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:54,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974856030] [2021-10-07 16:15:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:15:54,849 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:54,850 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:54,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 16:15:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:15:55,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 16:15:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:55,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:55,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:55,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974856030] [2021-10-07 16:15:55,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974856030] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:55,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:55,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:15:55,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538418769] [2021-10-07 16:15:55,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:15:55,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:55,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:15:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:15:55,575 INFO L87 Difference]: Start difference. First operand 1760 states and 7246 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:15:56,354 INFO L93 Difference]: Finished difference Result 1782 states and 7190 transitions. [2021-10-07 16:15:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 16:15:56,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 16:15:56,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:15:56,360 INFO L225 Difference]: With dead ends: 1782 [2021-10-07 16:15:56,360 INFO L226 Difference]: Without dead ends: 1782 [2021-10-07 16:15:56,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:15:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-07 16:15:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1746. [2021-10-07 16:15:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1737 states have (on average 4.095567069660334) internal successors, (7114), 1745 states have internal predecessors, (7114), 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) [2021-10-07 16:15:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 7114 transitions. [2021-10-07 16:15:56,404 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 7114 transitions. Word has length 11 [2021-10-07 16:15:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:15:56,405 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 7114 transitions. [2021-10-07 16:15:56,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:15:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 7114 transitions. [2021-10-07 16:15:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:15:56,406 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:15:56,406 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:15:56,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 16:15:56,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:15:56,619 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:15:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:15:56,620 INFO L82 PathProgramCache]: Analyzing trace with hash 236676447, now seen corresponding path program 2 times [2021-10-07 16:15:56,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:15:56,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88950402] [2021-10-07 16:15:56,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:15:56,621 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:15:56,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:15:56,623 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:15:56,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 16:15:56,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:15:56,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:15:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:15:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:15:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:15:57,172 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:15:57,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:15:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:57,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:15:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:15:59,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:15:59,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88950402] [2021-10-07 16:15:59,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88950402] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:15:59,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:15:59,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:15:59,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270390492] [2021-10-07 16:15:59,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:15:59,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:15:59,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:15:59,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:15:59,232 INFO L87 Difference]: Start difference. First operand 1746 states and 7114 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:13,365 INFO L93 Difference]: Finished difference Result 2524 states and 9805 transitions. [2021-10-07 16:16:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:16:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 16:16:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:13,376 INFO L225 Difference]: With dead ends: 2524 [2021-10-07 16:16:13,376 INFO L226 Difference]: Without dead ends: 2524 [2021-10-07 16:16:13,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 6258.8ms TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:16:13,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-10-07 16:16:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1694. [2021-10-07 16:16:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1685 states have (on average 4.148367952522255) internal successors, (6990), 1693 states have internal predecessors, (6990), 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) [2021-10-07 16:16:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 6990 transitions. [2021-10-07 16:16:13,434 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 6990 transitions. Word has length 12 [2021-10-07 16:16:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:13,434 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 6990 transitions. [2021-10-07 16:16:13,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 6990 transitions. [2021-10-07 16:16:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:16:13,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:13,436 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2021-10-07 16:16:13,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-07 16:16:13,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:13,651 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:13,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1839693412, now seen corresponding path program 3 times [2021-10-07 16:16:13,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:13,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107864179] [2021-10-07 16:16:13,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:16:13,655 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:13,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:13,656 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:13,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 16:16:14,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 16:16:14,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:16:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:14,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:14,287 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:14,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:16:14,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:14,753 INFO L388 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 9 treesize of output 7 [2021-10-07 16:16:14,784 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:16:14,787 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:16:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:16:15,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:15,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107864179] [2021-10-07 16:16:15,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107864179] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:15,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:15,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 16:16:15,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313166301] [2021-10-07 16:16:15,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:16:15,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:16:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:16:15,733 INFO L87 Difference]: Start difference. First operand 1694 states and 6990 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-10-07 16:16:20,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:20,250 INFO L93 Difference]: Finished difference Result 2567 states and 10318 transitions. [2021-10-07 16:16:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:16:20,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 16:16:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:20,260 INFO L225 Difference]: With dead ends: 2567 [2021-10-07 16:16:20,260 INFO L226 Difference]: Without dead ends: 2567 [2021-10-07 16:16:20,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2262.8ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:16:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-10-07 16:16:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2133. [2021-10-07 16:16:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2124 states have (on average 4.191148775894539) internal successors, (8902), 2132 states have internal predecessors, (8902), 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) [2021-10-07 16:16:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 8902 transitions. [2021-10-07 16:16:20,327 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 8902 transitions. Word has length 12 [2021-10-07 16:16:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:20,327 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 8902 transitions. [2021-10-07 16:16:20,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-10-07 16:16:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 8902 transitions. [2021-10-07 16:16:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:16:20,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:20,329 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:16:20,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:20,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:20,544 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1056161784, now seen corresponding path program 2 times [2021-10-07 16:16:20,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:20,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708378611] [2021-10-07 16:16:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:16:20,546 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:20,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:20,547 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:20,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 16:16:20,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:16:20,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:20,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:16:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:20,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:21,077 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:21,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:21,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:23,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:23,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708378611] [2021-10-07 16:16:23,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708378611] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:23,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:23,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:16:23,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841257767] [2021-10-07 16:16:23,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:16:23,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:16:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:16:23,120 INFO L87 Difference]: Start difference. First operand 2133 states and 8902 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:31,098 INFO L93 Difference]: Finished difference Result 3726 states and 15435 transitions. [2021-10-07 16:16:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:16:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 16:16:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:31,130 INFO L225 Difference]: With dead ends: 3726 [2021-10-07 16:16:31,130 INFO L226 Difference]: Without dead ends: 3726 [2021-10-07 16:16:31,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 5229.6ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:16:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2021-10-07 16:16:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 2860. [2021-10-07 16:16:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2851 states have (on average 4.296387232549982) internal successors, (12249), 2859 states have internal predecessors, (12249), 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) [2021-10-07 16:16:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 12249 transitions. [2021-10-07 16:16:31,207 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 12249 transitions. Word has length 12 [2021-10-07 16:16:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:31,207 INFO L470 AbstractCegarLoop]: Abstraction has 2860 states and 12249 transitions. [2021-10-07 16:16:31,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 12249 transitions. [2021-10-07 16:16:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:16:31,209 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:31,209 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2021-10-07 16:16:31,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:31,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:31,422 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:31,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1584738324, now seen corresponding path program 4 times [2021-10-07 16:16:31,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:31,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594451102] [2021-10-07 16:16:31,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:16:31,425 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:31,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:31,425 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:31,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 16:16:31,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:16:31,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:31,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:16:31,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:31,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:31,967 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:31,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:32,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:34,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:34,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594451102] [2021-10-07 16:16:34,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594451102] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:34,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:34,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:16:34,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950500344] [2021-10-07 16:16:34,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 16:16:34,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:34,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 16:16:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:16:34,857 INFO L87 Difference]: Start difference. First operand 2860 states and 12249 transitions. Second operand has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:16:51,269 INFO L93 Difference]: Finished difference Result 6067 states and 24865 transitions. [2021-10-07 16:16:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-07 16:16:51,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:16:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:16:51,292 INFO L225 Difference]: With dead ends: 6067 [2021-10-07 16:16:51,292 INFO L226 Difference]: Without dead ends: 6067 [2021-10-07 16:16:51,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 9697.7ms TimeCoverageRelationStatistics Valid=634, Invalid=2228, Unknown=0, NotChecked=0, Total=2862 [2021-10-07 16:16:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2021-10-07 16:16:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 3405. [2021-10-07 16:16:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3405 states, 3396 states have (on average 4.4369846878680805) internal successors, (15068), 3404 states have internal predecessors, (15068), 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) [2021-10-07 16:16:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 15068 transitions. [2021-10-07 16:16:51,421 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 15068 transitions. Word has length 13 [2021-10-07 16:16:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:16:51,421 INFO L470 AbstractCegarLoop]: Abstraction has 3405 states and 15068 transitions. [2021-10-07 16:16:51,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:16:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 15068 transitions. [2021-10-07 16:16:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:16:51,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:16:51,424 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-07 16:16:51,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 16:16:51,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:16:51,634 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:16:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:16:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1096509542, now seen corresponding path program 5 times [2021-10-07 16:16:51,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:16:51,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481913409] [2021-10-07 16:16:51,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:16:51,636 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:16:51,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:16:51,637 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:16:51,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 16:16:51,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 16:16:51,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:16:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-07 16:16:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:16:52,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:16:52,269 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:16:52,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:16:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:52,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:16:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:16:55,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:16:55,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481913409] [2021-10-07 16:16:55,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481913409] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:16:55,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:16:55,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:16:55,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197602838] [2021-10-07 16:16:55,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:16:55,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:16:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:16:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:16:55,351 INFO L87 Difference]: Start difference. First operand 3405 states and 15068 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:18,815 INFO L93 Difference]: Finished difference Result 5565 states and 23217 transitions. [2021-10-07 16:17:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 16:17:18,817 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:17:18,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:18,857 INFO L225 Difference]: With dead ends: 5565 [2021-10-07 16:17:18,857 INFO L226 Difference]: Without dead ends: 5565 [2021-10-07 16:17:18,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 12014.8ms TimeCoverageRelationStatistics Valid=514, Invalid=2242, Unknown=0, NotChecked=0, Total=2756 [2021-10-07 16:17:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5565 states. [2021-10-07 16:17:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5565 to 3608. [2021-10-07 16:17:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3608 states, 3599 states have (on average 4.358155043067518) internal successors, (15685), 3607 states have internal predecessors, (15685), 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) [2021-10-07 16:17:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3608 states to 3608 states and 15685 transitions. [2021-10-07 16:17:18,956 INFO L78 Accepts]: Start accepts. Automaton has 3608 states and 15685 transitions. Word has length 13 [2021-10-07 16:17:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:18,957 INFO L470 AbstractCegarLoop]: Abstraction has 3608 states and 15685 transitions. [2021-10-07 16:17:18,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3608 states and 15685 transitions. [2021-10-07 16:17:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:17:18,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:18,959 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:18,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:19,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:19,166 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:19,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2044946443, now seen corresponding path program 2 times [2021-10-07 16:17:19,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:19,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470589941] [2021-10-07 16:17:19,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:17:19,168 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:19,169 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:19,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 16:17:19,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:17:19,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:17:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:19,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:19,715 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:19,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:17:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:17:20,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:17:21,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:21,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470589941] [2021-10-07 16:17:21,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470589941] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:17:21,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:17:21,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:17:21,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835809098] [2021-10-07 16:17:21,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:17:21,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:21,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:17:21,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:17:21,140 INFO L87 Difference]: Start difference. First operand 3608 states and 15685 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-10-07 16:17:21,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:21,774 INFO L93 Difference]: Finished difference Result 4202 states and 17962 transitions. [2021-10-07 16:17:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:17:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:17:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:21,788 INFO L225 Difference]: With dead ends: 4202 [2021-10-07 16:17:21,788 INFO L226 Difference]: Without dead ends: 4202 [2021-10-07 16:17:21,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:17:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2021-10-07 16:17:21,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 3039. [2021-10-07 16:17:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 3030 states have (on average 4.238283828382838) internal successors, (12842), 3038 states have internal predecessors, (12842), 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) [2021-10-07 16:17:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 12842 transitions. [2021-10-07 16:17:21,909 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 12842 transitions. Word has length 13 [2021-10-07 16:17:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:21,909 INFO L470 AbstractCegarLoop]: Abstraction has 3039 states and 12842 transitions. [2021-10-07 16:17:21,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-10-07 16:17:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 12842 transitions. [2021-10-07 16:17:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:17:21,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:21,912 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:21,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:22,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:22,127 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash -36161309, now seen corresponding path program 3 times [2021-10-07 16:17:22,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:22,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222379028] [2021-10-07 16:17:22,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:17:22,130 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:22,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:22,132 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:22,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 16:17:22,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 16:17:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:22,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:17:22,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:22,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:22,893 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:22,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:17:23,021 INFO L388 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 13 treesize of output 9 [2021-10-07 16:17:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:17:23,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:17:23,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:23,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222379028] [2021-10-07 16:17:23,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222379028] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:23,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:23,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 16:17:23,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663692789] [2021-10-07 16:17:23,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:17:23,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:17:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:17:23,696 INFO L87 Difference]: Start difference. First operand 3039 states and 12842 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:26,502 INFO L93 Difference]: Finished difference Result 2903 states and 11961 transitions. [2021-10-07 16:17:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:17:26,504 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 16:17:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:26,514 INFO L225 Difference]: With dead ends: 2903 [2021-10-07 16:17:26,514 INFO L226 Difference]: Without dead ends: 2903 [2021-10-07 16:17:26,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1461.1ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-07 16:17:26,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-10-07 16:17:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2807. [2021-10-07 16:17:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2798 states have (on average 4.206576125804146) internal successors, (11770), 2806 states have internal predecessors, (11770), 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) [2021-10-07 16:17:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 11770 transitions. [2021-10-07 16:17:26,622 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 11770 transitions. Word has length 14 [2021-10-07 16:17:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:26,622 INFO L470 AbstractCegarLoop]: Abstraction has 2807 states and 11770 transitions. [2021-10-07 16:17:26,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 11770 transitions. [2021-10-07 16:17:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:17:26,627 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:26,628 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:26,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-07 16:17:26,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:26,843 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:26,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1459442995, now seen corresponding path program 3 times [2021-10-07 16:17:26,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:26,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331360603] [2021-10-07 16:17:26,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:17:26,845 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:26,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:26,847 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:26,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 16:17:27,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:17:27,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:17:27,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:27,596 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:27,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:17:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:17:28,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:17:29,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:29,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331360603] [2021-10-07 16:17:29,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331360603] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:29,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:29,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:17:29,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944911119] [2021-10-07 16:17:29,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:17:29,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:17:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:17:29,701 INFO L87 Difference]: Start difference. First operand 2807 states and 11770 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:30,900 INFO L93 Difference]: Finished difference Result 2899 states and 11755 transitions. [2021-10-07 16:17:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:17:30,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 16:17:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:30,911 INFO L225 Difference]: With dead ends: 2899 [2021-10-07 16:17:30,911 INFO L226 Difference]: Without dead ends: 2899 [2021-10-07 16:17:30,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1297.9ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:17:30,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-10-07 16:17:30,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2091. [2021-10-07 16:17:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2091 states, 2086 states have (on average 4.017737296260786) internal successors, (8381), 2090 states have internal predecessors, (8381), 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) [2021-10-07 16:17:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 8381 transitions. [2021-10-07 16:17:30,975 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 8381 transitions. Word has length 14 [2021-10-07 16:17:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:30,975 INFO L470 AbstractCegarLoop]: Abstraction has 2091 states and 8381 transitions. [2021-10-07 16:17:30,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:17:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 8381 transitions. [2021-10-07 16:17:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:17:30,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:30,977 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:30,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-07 16:17:31,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:31,178 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash -970110869, now seen corresponding path program 4 times [2021-10-07 16:17:31,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:31,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613544454] [2021-10-07 16:17:31,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:17:31,181 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:31,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:31,182 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:31,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 16:17:31,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:17:31,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:31,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-07 16:17:31,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:31,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:17:31,770 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:17:31,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:17:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:17:32,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:17:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:17:34,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:17:34,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613544454] [2021-10-07 16:17:34,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613544454] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:17:34,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:17:34,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:17:34,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614844679] [2021-10-07 16:17:34,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 16:17:34,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:17:34,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 16:17:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-10-07 16:17:34,854 INFO L87 Difference]: Start difference. First operand 2091 states and 8381 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 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) [2021-10-07 16:17:59,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:17:59,189 INFO L93 Difference]: Finished difference Result 4700 states and 17526 transitions. [2021-10-07 16:17:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:17:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 16:17:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:17:59,224 INFO L225 Difference]: With dead ends: 4700 [2021-10-07 16:17:59,224 INFO L226 Difference]: Without dead ends: 4700 [2021-10-07 16:17:59,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 12348.1ms TimeCoverageRelationStatistics Valid=514, Invalid=1648, Unknown=0, NotChecked=0, Total=2162 [2021-10-07 16:17:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4700 states. [2021-10-07 16:17:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4700 to 2768. [2021-10-07 16:17:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2763 states have (on average 4.184581976112921) internal successors, (11562), 2767 states have internal predecessors, (11562), 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) [2021-10-07 16:17:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 11562 transitions. [2021-10-07 16:17:59,298 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 11562 transitions. Word has length 15 [2021-10-07 16:17:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:17:59,298 INFO L470 AbstractCegarLoop]: Abstraction has 2768 states and 11562 transitions. [2021-10-07 16:17:59,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 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) [2021-10-07 16:17:59,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 11562 transitions. [2021-10-07 16:17:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:17:59,301 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:17:59,301 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:17:59,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-07 16:17:59,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:17:59,513 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:17:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:17:59,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1390061031, now seen corresponding path program 5 times [2021-10-07 16:17:59,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:17:59,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370671466] [2021-10-07 16:17:59,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:17:59,515 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:17:59,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:17:59,516 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:17:59,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-07 16:17:59,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 16:17:59,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:17:59,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-07 16:17:59,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:17:59,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:18:00,217 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:18:00,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:18:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:01,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:03,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:03,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370671466] [2021-10-07 16:18:03,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370671466] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:03,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:03,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 16:18:03,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358301695] [2021-10-07 16:18:03,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 16:18:03,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:03,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 16:18:03,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:18:03,472 INFO L87 Difference]: Start difference. First operand 2768 states and 11562 transitions. Second operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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) [2021-10-07 16:18:25,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:18:25,951 INFO L93 Difference]: Finished difference Result 4986 states and 19516 transitions. [2021-10-07 16:18:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 16:18:25,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 16:18:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:18:25,966 INFO L225 Difference]: With dead ends: 4986 [2021-10-07 16:18:25,966 INFO L226 Difference]: Without dead ends: 4986 [2021-10-07 16:18:25,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 12619.8ms TimeCoverageRelationStatistics Valid=481, Invalid=1969, Unknown=0, NotChecked=0, Total=2450 [2021-10-07 16:18:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4986 states. [2021-10-07 16:18:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4986 to 2739. [2021-10-07 16:18:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2734 states have (on average 4.203730797366496) internal successors, (11493), 2738 states have internal predecessors, (11493), 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) [2021-10-07 16:18:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 11493 transitions. [2021-10-07 16:18:26,034 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 11493 transitions. Word has length 15 [2021-10-07 16:18:26,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:18:26,034 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 11493 transitions. [2021-10-07 16:18:26,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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) [2021-10-07 16:18:26,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 11493 transitions. [2021-10-07 16:18:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:18:26,037 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:18:26,037 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 16:18:26,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-07 16:18:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:18:26,239 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:18:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:18:26,240 INFO L82 PathProgramCache]: Analyzing trace with hash -854905635, now seen corresponding path program 3 times [2021-10-07 16:18:26,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:18:26,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055738435] [2021-10-07 16:18:26,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:18:26,242 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:18:26,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:18:26,243 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:18:26,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-07 16:18:26,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 16:18:26,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:18:26,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:18:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:18:26,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:18:27,140 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:18:27,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:18:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:28,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:18:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:18:34,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:18:34,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055738435] [2021-10-07 16:18:34,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055738435] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:18:34,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:18:34,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:18:34,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624367515] [2021-10-07 16:18:34,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:18:34,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:18:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:18:34,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:18:34,846 INFO L87 Difference]: Start difference. First operand 2739 states and 11493 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 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) [2021-10-07 16:18:46,894 WARN L207 SmtUtils]: Spent 9.03 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 16:18:54,853 WARN L207 SmtUtils]: Spent 7.06 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:19:02,161 WARN L207 SmtUtils]: Spent 6.31 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 16:19:08,043 WARN L207 SmtUtils]: Spent 5.01 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-07 16:19:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:37,285 INFO L93 Difference]: Finished difference Result 55698 states and 247166 transitions. [2021-10-07 16:19:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:19:37,288 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 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 16 [2021-10-07 16:19:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:38,142 INFO L225 Difference]: With dead ends: 55698 [2021-10-07 16:19:38,142 INFO L226 Difference]: Without dead ends: 55698 [2021-10-07 16:19:38,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 55580.6ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:19:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55698 states. [2021-10-07 16:19:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55698 to 2755. [2021-10-07 16:19:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2750 states have (on average 4.1909090909090905) internal successors, (11525), 2754 states have internal predecessors, (11525), 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) [2021-10-07 16:19:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 11525 transitions. [2021-10-07 16:19:39,291 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 11525 transitions. Word has length 16 [2021-10-07 16:19:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:39,293 INFO L470 AbstractCegarLoop]: Abstraction has 2755 states and 11525 transitions. [2021-10-07 16:19:39,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 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) [2021-10-07 16:19:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 11525 transitions. [2021-10-07 16:19:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 16:19:39,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:39,316 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2021-10-07 16:19:39,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:39,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:39,530 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:19:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:39,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1543030874, now seen corresponding path program 6 times [2021-10-07 16:19:39,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:39,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930582899] [2021-10-07 16:19:39,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:19:39,533 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:39,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:39,543 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:39,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-07 16:19:40,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:19:40,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:19:40,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:40,634 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:40,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-07 16:19:41,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:42,691 INFO L388 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 9 treesize of output 7 [2021-10-07 16:19:42,708 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:19:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:19:47,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:47,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930582899] [2021-10-07 16:19:47,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930582899] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:47,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:47,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-10-07 16:19:47,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175863790] [2021-10-07 16:19:47,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 16:19:47,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 16:19:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:19:47,873 INFO L87 Difference]: Start difference. First operand 2755 states and 11525 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 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) [2021-10-07 16:19:56,538 WARN L207 SmtUtils]: Spent 7.44 s on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-10-07 16:20:05,555 WARN L207 SmtUtils]: Spent 8.00 s on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-10-07 16:20:14,299 WARN L207 SmtUtils]: Spent 6.94 s on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2021-10-07 16:22:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:22:00,488 INFO L93 Difference]: Finished difference Result 7031 states and 27568 transitions. [2021-10-07 16:22:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-07 16:22:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 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 19 [2021-10-07 16:22:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:22:00,515 INFO L225 Difference]: With dead ends: 7031 [2021-10-07 16:22:00,516 INFO L226 Difference]: Without dead ends: 7031 [2021-10-07 16:22:00,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 64951.8ms TimeCoverageRelationStatistics Valid=686, Invalid=3604, Unknown=0, NotChecked=0, Total=4290 [2021-10-07 16:22:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7031 states. [2021-10-07 16:22:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7031 to 4561. [2021-10-07 16:22:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4556 states have (on average 4.221246707638279) internal successors, (19232), 4560 states have internal predecessors, (19232), 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) [2021-10-07 16:22:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 19232 transitions. [2021-10-07 16:22:00,669 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 19232 transitions. Word has length 19 [2021-10-07 16:22:00,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:22:00,669 INFO L470 AbstractCegarLoop]: Abstraction has 4561 states and 19232 transitions. [2021-10-07 16:22:00,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 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) [2021-10-07 16:22:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 19232 transitions. [2021-10-07 16:22:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 16:22:00,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:22:00,676 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:22:00,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-07 16:22:00,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:22:00,877 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:22:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:00,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1052867481, now seen corresponding path program 6 times [2021-10-07 16:22:00,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:00,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813179305] [2021-10-07 16:22:00,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:22:00,879 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:00,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:00,881 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:00,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-07 16:22:01,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:22:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:22:01,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:22:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:01,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:01,997 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:22:01,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:22:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:22:03,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:22:03,084 INFO L388 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 9 treesize of output 7 [2021-10-07 16:22:03,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:22:03,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:22:03,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:22:03,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:22:03,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:22:03,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-07 16:22:03,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2021-10-07 16:22:03,136 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-07 16:22:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:22:07,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:07,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813179305] [2021-10-07 16:22:07,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813179305] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:22:07,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:22:07,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-10-07 16:22:07,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729530557] [2021-10-07 16:22:07,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-07 16:22:07,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:22:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-07 16:22:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:22:07,738 INFO L87 Difference]: Start difference. First operand 4561 states and 19232 transitions. Second operand has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 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) [2021-10-07 16:22:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:22:47,811 INFO L93 Difference]: Finished difference Result 9004 states and 33282 transitions. [2021-10-07 16:22:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-07 16:22:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 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 [2021-10-07 16:22:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:22:47,840 INFO L225 Difference]: With dead ends: 9004 [2021-10-07 16:22:47,840 INFO L226 Difference]: Without dead ends: 9004 [2021-10-07 16:22:47,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 15485.2ms TimeCoverageRelationStatistics Valid=808, Invalid=3224, Unknown=0, NotChecked=0, Total=4032 [2021-10-07 16:22:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9004 states. [2021-10-07 16:22:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9004 to 5564. [2021-10-07 16:22:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5564 states, 5559 states have (on average 4.29285842777478) internal successors, (23864), 5563 states have internal predecessors, (23864), 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) [2021-10-07 16:22:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5564 states to 5564 states and 23864 transitions. [2021-10-07 16:22:48,072 INFO L78 Accepts]: Start accepts. Automaton has 5564 states and 23864 transitions. Word has length 21 [2021-10-07 16:22:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:22:48,073 INFO L470 AbstractCegarLoop]: Abstraction has 5564 states and 23864 transitions. [2021-10-07 16:22:48,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 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) [2021-10-07 16:22:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5564 states and 23864 transitions. [2021-10-07 16:22:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:22:48,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:22:48,082 INFO L512 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1] [2021-10-07 16:22:48,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-07 16:22:48,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:22:48,293 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:22:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash -717238754, now seen corresponding path program 7 times [2021-10-07 16:22:48,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:48,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694424380] [2021-10-07 16:22:48,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:22:48,295 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:48,296 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:48,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-07 16:22:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:22:48,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 16:22:48,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:48,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:49,085 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:22:49,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:22:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 18 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:22:50,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:22:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:22:57,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:57,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694424380] [2021-10-07 16:22:57,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694424380] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:22:57,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:22:57,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 39 [2021-10-07 16:22:57,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321515173] [2021-10-07 16:22:57,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-07 16:22:57,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:22:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-07 16:22:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 16:22:57,371 INFO L87 Difference]: Start difference. First operand 5564 states and 23864 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 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) [2021-10-07 16:23:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:23:56,746 INFO L93 Difference]: Finished difference Result 14537 states and 57769 transitions. [2021-10-07 16:23:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-07 16:23:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 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 22 [2021-10-07 16:23:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:23:56,798 INFO L225 Difference]: With dead ends: 14537 [2021-10-07 16:23:56,799 INFO L226 Difference]: Without dead ends: 14537 [2021-10-07 16:23:56,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 34450.6ms TimeCoverageRelationStatistics Valid=2380, Invalid=12872, Unknown=0, NotChecked=0, Total=15252 [2021-10-07 16:23:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14537 states. [2021-10-07 16:23:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14537 to 7030. [2021-10-07 16:23:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7030 states, 7025 states have (on average 4.272455516014235) internal successors, (30014), 7029 states have internal predecessors, (30014), 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) [2021-10-07 16:23:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7030 states to 7030 states and 30014 transitions. [2021-10-07 16:23:57,092 INFO L78 Accepts]: Start accepts. Automaton has 7030 states and 30014 transitions. Word has length 22 [2021-10-07 16:23:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:23:57,092 INFO L470 AbstractCegarLoop]: Abstraction has 7030 states and 30014 transitions. [2021-10-07 16:23:57,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 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) [2021-10-07 16:23:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 7030 states and 30014 transitions. [2021-10-07 16:23:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:23:57,100 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:23:57,100 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:23:57,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-07 16:23:57,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:23:57,308 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:23:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:23:57,309 INFO L82 PathProgramCache]: Analyzing trace with hash 916829004, now seen corresponding path program 1 times [2021-10-07 16:23:57,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:23:57,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558057677] [2021-10-07 16:23:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:23:57,311 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:23:57,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:23:57,312 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:23:57,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-07 16:23:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:23:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-07 16:23:57,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:23:57,929 INFO L388 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 22 treesize of output 20 [2021-10-07 16:23:58,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:58,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:58,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:23:59,052 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-07 16:23:59,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 167 treesize of output 143 [2021-10-07 16:24:03,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:03,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:03,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:03,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:03,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:03,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:26:48,129 WARN L207 SmtUtils]: Spent 2.74 m on a formula simplification. DAG size of input: 347 DAG size of output: 123 [2021-10-07 16:26:48,130 INFO L354 Elim1Store]: treesize reduction 1666, result has 20.1 percent of original size [2021-10-07 16:26:48,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 209 treesize of output 520 Received shutdown request... [2021-10-07 16:28:27,830 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:28:27,830 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:28:28,254 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-10-07 16:28:28,256 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:28:28,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:28,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:28,458 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. [2021-10-07 16:28:28,461 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:28:28,462 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:28:28,462 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:28:28,462 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:28:28,462 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:28:28,462 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:28:28,462 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:28:28,462 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:28:28,463 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:28:28,463 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:28:28,463 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:28:28,463 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:28:28,463 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:28:28,463 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:28:28,463 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:28:28,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:28:28,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:28:28,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:28:28,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:28:28,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:28:28,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:28:28,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:28:28,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:28:28,465 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:28:28,465 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:28:28,465 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:28:28,465 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:28:28,465 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:28:28,465 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:28:28,466 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:28:28,466 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:28:28,466 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:28:28,466 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:28:28,466 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:28:28,466 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:28:28,466 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:28:28,466 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:28:28,467 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:28:28,467 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:28:28,467 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:28:28,467 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:28:28,467 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:28:28,475 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:28:28,475 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:28:28,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:28:28 BasicIcfg [2021-10-07 16:28:28,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:28:28,479 INFO L168 Benchmark]: Toolchain (without parser) took 842085.34 ms. Allocated memory was 151.0 MB in the beginning and 715.1 MB in the end (delta: 564.1 MB). Free memory was 125.1 MB in the beginning and 407.5 MB in the end (delta: -282.4 MB). Peak memory consumption was 596.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:28,479 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 133.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:28:28,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 540.56 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 111.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:28,480 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.66 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 110.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:28,480 INFO L168 Benchmark]: Boogie Preprocessor took 80.99 ms. Allocated memory is still 151.0 MB. Free memory was 110.0 MB in the beginning and 108.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:28,480 INFO L168 Benchmark]: RCFGBuilder took 1329.57 ms. Allocated memory is still 151.0 MB. Free memory was 108.2 MB in the beginning and 105.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:28,481 INFO L168 Benchmark]: TraceAbstraction took 840065.71 ms. Allocated memory was 151.0 MB in the beginning and 715.1 MB in the end (delta: 564.1 MB). Free memory was 104.4 MB in the beginning and 407.5 MB in the end (delta: -303.1 MB). Peak memory consumption was 574.2 MB. Max. memory is 8.0 GB. [2021-10-07 16:28:28,482 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 133.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 540.56 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 111.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.66 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 110.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 80.99 ms. Allocated memory is still 151.0 MB. Free memory was 110.0 MB in the beginning and 108.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1329.57 ms. Allocated memory is still 151.0 MB. Free memory was 108.2 MB in the beginning and 105.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 840065.71 ms. Allocated memory was 151.0 MB in the beginning and 715.1 MB in the end (delta: 564.1 MB). Free memory was 104.4 MB in the beginning and 407.5 MB in the end (delta: -303.1 MB). Peak memory consumption was 574.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 23770.0ms, 164 PlacesBefore, 61 PlacesAfterwards, 166 TransitionsBefore, 55 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 6 FixpointIterations, 86 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 166 TotalNumberOfCompositions, 3376 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3191, positive: 3164, positive conditional: 0, positive unconditional: 3164, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1438, positive: 1428, positive conditional: 0, positive unconditional: 1428, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1438, positive: 1428, positive conditional: 0, positive unconditional: 1428, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 546, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 546, negative conditional: 0, negative unconditional: 546, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3191, positive: 1736, positive conditional: 0, positive unconditional: 1736, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 1438, unknown conditional: 0, unknown unconditional: 1438] , Statistics on independence cache: Total cache size (in pairs): 148, Positive cache size: 146, Positive conditional cache size: 0, Positive unconditional cache size: 146, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 197 locations, 43 error locations. Started 1 CEGAR loops. OverallTime: 839880.4ms, OverallIterations: 36, TraceHistogramMax: 14, EmptinessCheckTime: 98.7ms, AutomataDifference: 445505.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23953.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2086 SDtfs, 23953 SDslu, 21561 SDs, 0 SdLazy, 30698 SolverSat, 1363 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 219891.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 996 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 782 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8470 ImplicationChecksByTransitivity, 251715.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7030occurred in iteration=35, InterpolantAutomatonStates: 574, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3948.5ms AutomataMinimizationTime, 35 MinimizatonAttempts, 94303 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 310.4ms SsaConstructionTime, 3606.2ms SatisfiabilityAnalysisTime, 79105.3ms InterpolantComputationTime, 342 NumberOfCodeBlocks, 332 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 614 ConstructedInterpolants, 126 QuantifiedInterpolants, 13972 SizeOfPredicates, 413 NumberOfNonLiveVariables, 2740 ConjunctsInSsa, 551 ConjunctsInUnsatCore, 70 InterpolantComputations, 20 PerfectInterpolantSequences, 260/1068 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown