/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-min-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 17:46:16,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 17:46:16,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 17:46:16,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-08 17:46:16,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-08 17:46:16,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-08 17:46:16,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-08 17:46:16,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-08 17:46:16,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-08 17:46:16,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-08 17:46:16,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-08 17:46:16,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-08 17:46:16,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 17:46:16,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 17:46:16,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 17:46:16,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 17:46:16,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 17:46:16,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 17:46:16,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 17:46:16,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 17:46:16,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 17:46:16,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 17:46:16,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 17:46:16,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 17:46:16,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-08 17:46:16,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 17:46:16,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 17:46:16,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 17:46:16,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 17:46:16,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 17:46:16,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 17:46:16,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 17:46:16,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 17:46:16,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 17:46:16,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 17:46:16,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 17:46:16,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 17:46:16,859 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 17:46:16,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 17:46:16,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 17:46:16,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 17:46:16,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 17:46:16,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 17:46:16,862 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 17:46:16,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 17:46:16,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 17:46:16,863 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 17:46:16,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 17:46:16,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 17:46:16,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 17:46:16,863 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 17:46:16,864 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 17:46:16,864 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 17:46:16,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 17:46:16,864 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 17:46:16,864 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 17:46:16,865 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 17:46:16,865 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 17:46:16,865 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 17:46:16,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 17:46:16,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 17:46:16,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 17:46:16,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:46:16,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 17:46:16,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 17:46:16,866 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 17:46:16,867 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 17:46:16,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 17:46:16,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 17:46:16,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 17:46:17,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 17:46:17,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 17:46:17,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 17:46:17,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 17:46:17,310 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 17:46:17,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2021-10-08 17:46:17,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/252339574/51303ccb8434467b8a2dcca68c995c49/FLAGd2ccec8c7 [2021-10-08 17:46:18,049 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 17:46:18,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2021-10-08 17:46:18,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/252339574/51303ccb8434467b8a2dcca68c995c49/FLAGd2ccec8c7 [2021-10-08 17:46:18,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/252339574/51303ccb8434467b8a2dcca68c995c49 [2021-10-08 17:46:18,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 17:46:18,438 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 17:46:18,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 17:46:18,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 17:46:18,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 17:46:18,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cee96b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18, skipping insertion in model container [2021-10-08 17:46:18,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 17:46:18,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:46:18,679 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-min-array-hom.wvr.c[2574,2587] [2021-10-08 17:46:18,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:46:18,716 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-08 17:46:18,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:46:18,762 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-min-array-hom.wvr.c[2574,2587] [2021-10-08 17:46:18,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:46:18,777 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 17:46:18,807 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-min-array-hom.wvr.c[2574,2587] [2021-10-08 17:46:18,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:46:18,831 INFO L208 MainTranslator]: Completed translation [2021-10-08 17:46:18,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18 WrapperNode [2021-10-08 17:46:18,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 17:46:18,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 17:46:18,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 17:46:18,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 17:46:18,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 17:46:18,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 17:46:18,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 17:46:18,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 17:46:18,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 17:46:18,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 17:46:18,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 17:46:18,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 17:46:18,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (1/1) ... [2021-10-08 17:46:18,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:46:18,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:46:19,002 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) [2021-10-08 17:46:19,029 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 [2021-10-08 17:46:19,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 17:46:19,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 17:46:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 17:46:19,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 17:46:19,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 17:46:19,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 17:46:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 17:46:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 17:46:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 17:46:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 17:46:19,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 17:46:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 17:46:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 17:46:19,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 17:46:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 17:46:19,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 17:46:19,090 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 17:46:20,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 17:46:20,505 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-08 17:46:20,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:46:20 BoogieIcfgContainer [2021-10-08 17:46:20,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 17:46:20,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 17:46:20,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 17:46:20,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 17:46:20,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 05:46:18" (1/3) ... [2021-10-08 17:46:20,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4173bb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:46:20, skipping insertion in model container [2021-10-08 17:46:20,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:46:18" (2/3) ... [2021-10-08 17:46:20,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4173bb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:46:20, skipping insertion in model container [2021-10-08 17:46:20,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:46:20" (3/3) ... [2021-10-08 17:46:20,518 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2021-10-08 17:46:20,524 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 17:46:20,525 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-08 17:46:20,525 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 17:46:20,564 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,564 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,565 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,565 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,565 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,565 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,566 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,566 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,566 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,566 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,567 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,567 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,567 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,568 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,568 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,568 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,569 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,569 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,569 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,569 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,570 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,571 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,571 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,571 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,572 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,572 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,573 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,574 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,574 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,574 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,575 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,576 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,576 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,576 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,576 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,577 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,577 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,579 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,580 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,580 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,581 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,582 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,582 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,583 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,584 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,584 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,584 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,585 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,585 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,585 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,585 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,587 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,588 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,588 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,588 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,588 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,588 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,589 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,589 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,589 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,590 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,590 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,590 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,591 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,591 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,591 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,591 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,592 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,592 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,592 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,592 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,593 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,593 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,598 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,598 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,598 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,601 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,601 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,601 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,601 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,602 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,602 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,605 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,605 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:46:20,612 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-08 17:46:20,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 17:46:20,674 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 [2021-10-08 17:46:20,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-08 17:46:20,694 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 17:46:20,708 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 172 transitions, 368 flow [2021-10-08 17:46:20,711 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 172 transitions, 368 flow [2021-10-08 17:46:20,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 368 flow [2021-10-08 17:46:20,788 INFO L129 PetriNetUnfolder]: 13/169 cut-off events. [2021-10-08 17:46:20,788 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-08 17:46:20,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 169 events. 13/169 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2021-10-08 17:46:20,799 INFO L116 LiptonReduction]: Number of co-enabled transitions 2688 [2021-10-08 17:46:47,818 INFO L131 LiptonReduction]: Checked pairs total: 3569 [2021-10-08 17:46:47,819 INFO L133 LiptonReduction]: Total number of compositions: 181 [2021-10-08 17:46:47,829 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2021-10-08 17:46:47,923 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) [2021-10-08 17:46:47,931 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) [2021-10-08 17:46:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:46:47,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:46:47,937 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:46:47,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:46:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:46:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash 22959, now seen corresponding path program 1 times [2021-10-08 17:46:47,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:46:47,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053736897] [2021-10-08 17:46:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:46:47,958 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:46:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:46:47,961 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) [2021-10-08 17:46:47,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 17:46:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:46:48,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:46:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:46:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:46:48,538 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:46:48,539 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 [2021-10-08 17:46:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:46:48,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:46:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:46:48,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:46:48,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053736897] [2021-10-08 17:46:48,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053736897] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:46:48,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:46:48,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:46:48,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809649113] [2021-10-08 17:46:48,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:46:48,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:46:48,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:46:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:46:48,792 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) [2021-10-08 17:46:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:46:49,401 INFO L93 Difference]: Finished difference Result 1498 states and 5133 transitions. [2021-10-08 17:46:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:46:49,404 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 [2021-10-08 17:46:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:46:49,444 INFO L225 Difference]: With dead ends: 1498 [2021-10-08 17:46:49,444 INFO L226 Difference]: Without dead ends: 1498 [2021-10-08 17:46:49,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:46:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-10-08 17:46:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 751. [2021-10-08 17:46:49,587 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) [2021-10-08 17:46:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2575 transitions. [2021-10-08 17:46:49,594 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2575 transitions. Word has length 2 [2021-10-08 17:46:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:46:49,595 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2575 transitions. [2021-10-08 17:46:49,596 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) [2021-10-08 17:46:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2575 transitions. [2021-10-08 17:46:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:46:49,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:46:49,597 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:46:49,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 17:46:49,811 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 [2021-10-08 17:46:49,811 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:46:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:46:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash 23067, now seen corresponding path program 1 times [2021-10-08 17:46:49,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:46:49,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136138293] [2021-10-08 17:46:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:46:49,818 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:46:49,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:46:49,821 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) [2021-10-08 17:46:49,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 17:46:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:46:49,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:46:49,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:46:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:46:49,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:46:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:46:49,964 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:46:49,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136138293] [2021-10-08 17:46:49,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136138293] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:46:49,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:46:49,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:46:49,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125010151] [2021-10-08 17:46:49,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:46:49,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:46:49,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:46:49,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:46:49,973 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) [2021-10-08 17:46:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:46:50,105 INFO L93 Difference]: Finished difference Result 752 states and 2572 transitions. [2021-10-08 17:46:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:46:50,106 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 [2021-10-08 17:46:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:46:50,115 INFO L225 Difference]: With dead ends: 752 [2021-10-08 17:46:50,115 INFO L226 Difference]: Without dead ends: 752 [2021-10-08 17:46:50,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:46:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-10-08 17:46:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 751. [2021-10-08 17:46:50,153 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) [2021-10-08 17:46:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2572 transitions. [2021-10-08 17:46:50,159 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2572 transitions. Word has length 2 [2021-10-08 17:46:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:46:50,159 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2572 transitions. [2021-10-08 17:46:50,160 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) [2021-10-08 17:46:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2572 transitions. [2021-10-08 17:46:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-08 17:46:50,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:46:50,161 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-08 17:46:50,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-08 17:46:50,373 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 [2021-10-08 17:46:50,374 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:46:50,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:46:50,375 INFO L82 PathProgramCache]: Analyzing trace with hash 22957, now seen corresponding path program 1 times [2021-10-08 17:46:50,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:46:50,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142711536] [2021-10-08 17:46:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:46:50,377 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:46:50,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:46:50,378 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) [2021-10-08 17:46:50,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 17:46:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:46:50,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:46:50,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:46:50,686 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 17:46:50,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-08 17:46:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:46:51,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:46:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:46:51,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:46:51,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142711536] [2021-10-08 17:46:51,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142711536] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:46:51,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:46:51,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:46:51,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155053733] [2021-10-08 17:46:51,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:46:51,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:46:51,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:46:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:46:51,394 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) [2021-10-08 17:46:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:46:51,511 INFO L93 Difference]: Finished difference Result 750 states and 2569 transitions. [2021-10-08 17:46:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:46:51,512 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 [2021-10-08 17:46:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:46:51,521 INFO L225 Difference]: With dead ends: 750 [2021-10-08 17:46:51,521 INFO L226 Difference]: Without dead ends: 750 [2021-10-08 17:46:51,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:46:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-10-08 17:46:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2021-10-08 17:46:51,549 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) [2021-10-08 17:46:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2569 transitions. [2021-10-08 17:46:51,555 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2569 transitions. Word has length 2 [2021-10-08 17:46:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:46:51,555 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2569 transitions. [2021-10-08 17:46:51,555 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) [2021-10-08 17:46:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2569 transitions. [2021-10-08 17:46:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:46:51,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:46:51,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:46:51,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-08 17:46:51,767 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 [2021-10-08 17:46:51,768 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:46:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:46:51,769 INFO L82 PathProgramCache]: Analyzing trace with hash 715142, now seen corresponding path program 1 times [2021-10-08 17:46:51,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:46:51,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010732417] [2021-10-08 17:46:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:46:51,771 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:46:51,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:46:51,772 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) [2021-10-08 17:46:51,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 17:46:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:46:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:46:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:46:52,141 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-08 17:46:52,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 521 treesize of output 530 [2021-10-08 17:46:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:46:58,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:46:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:46:58,240 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:46:58,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010732417] [2021-10-08 17:46:58,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010732417] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:46:58,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:46:58,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:46:58,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972077817] [2021-10-08 17:46:58,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:46:58,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:46:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:46:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:46:58,243 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) [2021-10-08 17:46:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:46:58,446 INFO L93 Difference]: Finished difference Result 624 states and 2067 transitions. [2021-10-08 17:46:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:46:58,447 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 [2021-10-08 17:46:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:46:58,454 INFO L225 Difference]: With dead ends: 624 [2021-10-08 17:46:58,454 INFO L226 Difference]: Without dead ends: 624 [2021-10-08 17:46:58,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:46:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-10-08 17:46:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2021-10-08 17:46:58,495 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) [2021-10-08 17:46:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2067 transitions. [2021-10-08 17:46:58,500 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2067 transitions. Word has length 3 [2021-10-08 17:46:58,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:46:58,500 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2067 transitions. [2021-10-08 17:46:58,501 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) [2021-10-08 17:46:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2067 transitions. [2021-10-08 17:46:58,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:46:58,501 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:46:58,501 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:46:58,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 17:46:58,713 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 [2021-10-08 17:46:58,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:46:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:46:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash 715143, now seen corresponding path program 1 times [2021-10-08 17:46:58,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:46:58,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733841140] [2021-10-08 17:46:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:46:58,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:46:58,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:46:58,720 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) [2021-10-08 17:46:58,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-08 17:46:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:46:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:46:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:46:59,094 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-08 17:46:59,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 105 [2021-10-08 17:46:59,110 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-08 17:46:59,111 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 279 treesize of output 269 [2021-10-08 17:47:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:00,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:01,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:01,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733841140] [2021-10-08 17:47:01,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733841140] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-08 17:47:01,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-08 17:47:01,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2021-10-08 17:47:01,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223066232] [2021-10-08 17:47:01,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:47:01,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:47:01,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:47:01,007 INFO L87 Difference]: Start difference. First operand 624 states and 2067 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:01,147 INFO L93 Difference]: Finished difference Result 498 states and 1565 transitions. [2021-10-08 17:47:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:47:01,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 17:47:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:01,153 INFO L225 Difference]: With dead ends: 498 [2021-10-08 17:47:01,154 INFO L226 Difference]: Without dead ends: 498 [2021-10-08 17:47:01,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:47:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-10-08 17:47:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2021-10-08 17:47:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 422 states have (on average 3.7085308056872037) internal successors, (1565), 497 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:01,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1565 transitions. [2021-10-08 17:47:01,174 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1565 transitions. Word has length 3 [2021-10-08 17:47:01,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:01,174 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1565 transitions. [2021-10-08 17:47:01,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1565 transitions. [2021-10-08 17:47:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 17:47:01,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:01,175 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-08 17:47:01,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:01,388 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 [2021-10-08 17:47:01,388 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:01,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:01,389 INFO L82 PathProgramCache]: Analyzing trace with hash 22169359, now seen corresponding path program 1 times [2021-10-08 17:47:01,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:01,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859827684] [2021-10-08 17:47:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:01,391 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:01,392 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) [2021-10-08 17:47:01,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-08 17:47:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:47:01,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:01,757 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:47:01,758 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 [2021-10-08 17:47:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:01,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:02,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:02,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859827684] [2021-10-08 17:47:02,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859827684] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:02,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:02,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 17:47:02,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034907721] [2021-10-08 17:47:02,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:47:02,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:47:02,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:47:02,463 INFO L87 Difference]: Start difference. First operand 498 states and 1565 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) [2021-10-08 17:47:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:04,184 INFO L93 Difference]: Finished difference Result 2474 states and 7805 transitions. [2021-10-08 17:47:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 17:47:04,186 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 [2021-10-08 17:47:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:04,209 INFO L225 Difference]: With dead ends: 2474 [2021-10-08 17:47:04,210 INFO L226 Difference]: Without dead ends: 2474 [2021-10-08 17:47:04,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 879.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:47:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-10-08 17:47:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 502. [2021-10-08 17:47:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 426 states have (on average 3.692488262910798) internal successors, (1573), 501 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1573 transitions. [2021-10-08 17:47:04,255 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1573 transitions. Word has length 4 [2021-10-08 17:47:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:04,255 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1573 transitions. [2021-10-08 17:47:04,255 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) [2021-10-08 17:47:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1573 transitions. [2021-10-08 17:47:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:47:04,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:04,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:47:04,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:04,469 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 [2021-10-08 17:47:04,470 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 687266745, now seen corresponding path program 1 times [2021-10-08 17:47:04,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:04,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014786121] [2021-10-08 17:47:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:04,473 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:04,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:04,475 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) [2021-10-08 17:47:04,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-08 17:47:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 17:47:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:04,796 INFO L354 Elim1Store]: treesize reduction 235, result has 20.6 percent of original size [2021-10-08 17:47:04,797 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 48 treesize of output 92 [2021-10-08 17:47:04,803 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 233 treesize of output 225 [2021-10-08 17:47:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:10,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:10,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:10,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014786121] [2021-10-08 17:47:10,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014786121] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:10,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:10,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 17:47:10,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84409330] [2021-10-08 17:47:10,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:47:10,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:47:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:47:10,532 INFO L87 Difference]: Start difference. First operand 502 states and 1573 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) [2021-10-08 17:47:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:11,088 INFO L93 Difference]: Finished difference Result 935 states and 2961 transitions. [2021-10-08 17:47:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 17:47:11,089 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 [2021-10-08 17:47:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:11,098 INFO L225 Difference]: With dead ends: 935 [2021-10-08 17:47:11,098 INFO L226 Difference]: Without dead ends: 935 [2021-10-08 17:47:11,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 338.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:47:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-10-08 17:47:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 472. [2021-10-08 17:47:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 408 states have (on average 3.6470588235294117) internal successors, (1488), 471 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1488 transitions. [2021-10-08 17:47:11,123 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1488 transitions. Word has length 5 [2021-10-08 17:47:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:11,124 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1488 transitions. [2021-10-08 17:47:11,124 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) [2021-10-08 17:47:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1488 transitions. [2021-10-08 17:47:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:47:11,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:11,125 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:47:11,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:11,338 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 [2021-10-08 17:47:11,339 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 687266746, now seen corresponding path program 1 times [2021-10-08 17:47:11,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:11,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758712086] [2021-10-08 17:47:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:11,341 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:11,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:11,343 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) [2021-10-08 17:47:11,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 17:47:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:11,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:47:11,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:11,635 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 17:47:11,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 166 treesize of output 207 [2021-10-08 17:47:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:17,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:17,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:17,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758712086] [2021-10-08 17:47:17,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758712086] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:47:17,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:47:17,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:47:17,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512348475] [2021-10-08 17:47:17,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:47:17,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:47:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:47:17,658 INFO L87 Difference]: Start difference. First operand 472 states and 1488 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) [2021-10-08 17:47:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:17,748 INFO L93 Difference]: Finished difference Result 442 states and 1403 transitions. [2021-10-08 17:47:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:47:17,749 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 [2021-10-08 17:47:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:17,753 INFO L225 Difference]: With dead ends: 442 [2021-10-08 17:47:17,753 INFO L226 Difference]: Without dead ends: 442 [2021-10-08 17:47:17,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:47:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-08 17:47:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-10-08 17:47:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 390 states have (on average 3.5974358974358975) internal successors, (1403), 441 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1403 transitions. [2021-10-08 17:47:17,770 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1403 transitions. Word has length 5 [2021-10-08 17:47:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:17,770 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1403 transitions. [2021-10-08 17:47:17,770 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) [2021-10-08 17:47:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1403 transitions. [2021-10-08 17:47:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 17:47:17,771 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:17,771 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 17:47:17,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:17,983 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 [2021-10-08 17:47:17,984 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:17,985 INFO L82 PathProgramCache]: Analyzing trace with hash -169572761, now seen corresponding path program 1 times [2021-10-08 17:47:17,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:17,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183300730] [2021-10-08 17:47:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:17,987 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:17,988 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) [2021-10-08 17:47:17,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 17:47:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:47:18,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:18,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:18,382 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 [2021-10-08 17:47:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:18,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:18,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183300730] [2021-10-08 17:47:18,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183300730] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:18,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:18,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:47:18,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266121912] [2021-10-08 17:47:18,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:47:18,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:18,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:47:18,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:47:18,461 INFO L87 Difference]: Start difference. First operand 442 states and 1403 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) [2021-10-08 17:47:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:19,148 INFO L93 Difference]: Finished difference Result 1451 states and 4609 transitions. [2021-10-08 17:47:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 17:47:19,150 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 [2021-10-08 17:47:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:19,162 INFO L225 Difference]: With dead ends: 1451 [2021-10-08 17:47:19,163 INFO L226 Difference]: Without dead ends: 1451 [2021-10-08 17:47:19,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-08 17:47:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-10-08 17:47:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 514. [2021-10-08 17:47:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 462 states have (on average 3.865800865800866) internal successors, (1786), 513 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1786 transitions. [2021-10-08 17:47:19,192 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1786 transitions. Word has length 6 [2021-10-08 17:47:19,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:19,193 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1786 transitions. [2021-10-08 17:47:19,193 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) [2021-10-08 17:47:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1786 transitions. [2021-10-08 17:47:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 17:47:19,194 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:19,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 17:47:19,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:19,408 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 [2021-10-08 17:47:19,409 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:19,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:19,410 INFO L82 PathProgramCache]: Analyzing trace with hash -169572760, now seen corresponding path program 1 times [2021-10-08 17:47:19,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:19,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265391730] [2021-10-08 17:47:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:19,411 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:19,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:19,413 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) [2021-10-08 17:47:19,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 17:47:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:19,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:47:19,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:19,710 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 17:47:19,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-08 17:47:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:20,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:20,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:20,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265391730] [2021-10-08 17:47:20,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265391730] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:47:20,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:47:20,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-08 17:47:20,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27109743] [2021-10-08 17:47:20,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:47:20,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:20,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:47:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:47:20,220 INFO L87 Difference]: Start difference. First operand 514 states and 1786 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) [2021-10-08 17:47:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:20,333 INFO L93 Difference]: Finished difference Result 310 states and 1016 transitions. [2021-10-08 17:47:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:47:20,334 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 [2021-10-08 17:47:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:20,337 INFO L225 Difference]: With dead ends: 310 [2021-10-08 17:47:20,337 INFO L226 Difference]: Without dead ends: 310 [2021-10-08 17:47:20,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 17:47:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-08 17:47:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-10-08 17:47:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 289 states have (on average 3.5155709342560555) internal successors, (1016), 309 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1016 transitions. [2021-10-08 17:47:20,349 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1016 transitions. Word has length 6 [2021-10-08 17:47:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:20,349 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1016 transitions. [2021-10-08 17:47:20,349 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) [2021-10-08 17:47:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1016 transitions. [2021-10-08 17:47:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:47:20,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:20,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:47:20,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:20,562 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 [2021-10-08 17:47:20,563 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:20,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:20,563 INFO L82 PathProgramCache]: Analyzing trace with hash -961784061, now seen corresponding path program 1 times [2021-10-08 17:47:20,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:20,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752491841] [2021-10-08 17:47:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:20,565 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:20,566 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) [2021-10-08 17:47:20,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-08 17:47:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 17:47:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:20,925 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:47:20,925 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 [2021-10-08 17:47:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:21,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:21,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:21,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752491841] [2021-10-08 17:47:21,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752491841] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:21,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:21,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:47:21,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412622771] [2021-10-08 17:47:21,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:47:21,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:47:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:47:21,535 INFO L87 Difference]: Start difference. First operand 310 states and 1016 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) [2021-10-08 17:47:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:22,569 INFO L93 Difference]: Finished difference Result 560 states and 1852 transitions. [2021-10-08 17:47:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 17:47:22,571 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 [2021-10-08 17:47:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:22,576 INFO L225 Difference]: With dead ends: 560 [2021-10-08 17:47:22,576 INFO L226 Difference]: Without dead ends: 560 [2021-10-08 17:47:22,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 742.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-08 17:47:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-10-08 17:47:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 460. [2021-10-08 17:47:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 439 states have (on average 3.662870159453303) internal successors, (1608), 459 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1608 transitions. [2021-10-08 17:47:22,594 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1608 transitions. Word has length 7 [2021-10-08 17:47:22,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:22,595 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1608 transitions. [2021-10-08 17:47:22,595 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) [2021-10-08 17:47:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1608 transitions. [2021-10-08 17:47:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:47:22,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:22,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:47:22,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:22,808 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 [2021-10-08 17:47:22,808 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash -961603340, now seen corresponding path program 1 times [2021-10-08 17:47:22,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:22,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621102117] [2021-10-08 17:47:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:22,811 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:22,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:22,812 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) [2021-10-08 17:47:22,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-08 17:47:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:22,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:47:22,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:23,199 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:47:23,199 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 [2021-10-08 17:47:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:23,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:23,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:23,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621102117] [2021-10-08 17:47:23,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621102117] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:23,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:23,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 17:47:23,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88411921] [2021-10-08 17:47:23,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:47:23,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:23,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:47:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:47:23,693 INFO L87 Difference]: Start difference. First operand 460 states and 1608 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) [2021-10-08 17:47:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:24,045 INFO L93 Difference]: Finished difference Result 839 states and 2969 transitions. [2021-10-08 17:47:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 17:47:24,046 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 [2021-10-08 17:47:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:24,054 INFO L225 Difference]: With dead ends: 839 [2021-10-08 17:47:24,055 INFO L226 Difference]: Without dead ends: 839 [2021-10-08 17:47:24,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:47:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-10-08 17:47:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 424. [2021-10-08 17:47:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 3.647921760391198) internal successors, (1492), 423 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1492 transitions. [2021-10-08 17:47:24,075 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1492 transitions. Word has length 7 [2021-10-08 17:47:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:24,075 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1492 transitions. [2021-10-08 17:47:24,075 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) [2021-10-08 17:47:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1492 transitions. [2021-10-08 17:47:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:47:24,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:24,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:47:24,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-08 17:47:24,288 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 [2021-10-08 17:47:24,289 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash -961603338, now seen corresponding path program 1 times [2021-10-08 17:47:24,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:24,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823994394] [2021-10-08 17:47:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:24,291 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:24,292 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) [2021-10-08 17:47:24,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-08 17:47:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:24,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:47:24,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:24,679 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-08 17:47:24,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-08 17:47:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:25,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:25,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:25,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823994394] [2021-10-08 17:47:25,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823994394] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:47:25,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:47:25,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:47:25,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860076335] [2021-10-08 17:47:25,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:47:25,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:47:25,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:47:25,185 INFO L87 Difference]: Start difference. First operand 424 states and 1492 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) [2021-10-08 17:47:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:25,237 INFO L93 Difference]: Finished difference Result 388 states and 1376 transitions. [2021-10-08 17:47:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:47:25,242 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 [2021-10-08 17:47:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:25,246 INFO L225 Difference]: With dead ends: 388 [2021-10-08 17:47:25,246 INFO L226 Difference]: Without dead ends: 388 [2021-10-08 17:47:25,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:47:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-10-08 17:47:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-10-08 17:47:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 379 states have (on average 3.6306068601583115) internal successors, (1376), 387 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1376 transitions. [2021-10-08 17:47:25,260 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1376 transitions. Word has length 7 [2021-10-08 17:47:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:25,260 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1376 transitions. [2021-10-08 17:47:25,260 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) [2021-10-08 17:47:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1376 transitions. [2021-10-08 17:47:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:47:25,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:25,261 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-08 17:47:25,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:25,474 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 [2021-10-08 17:47:25,474 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:25,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:25,475 INFO L82 PathProgramCache]: Analyzing trace with hash -138765873, now seen corresponding path program 2 times [2021-10-08 17:47:25,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:25,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903064534] [2021-10-08 17:47:25,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:47:25,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:25,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:25,478 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) [2021-10-08 17:47:25,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-08 17:47:25,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:47:25,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:47:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 17:47:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:25,861 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:47:25,861 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 [2021-10-08 17:47:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:26,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:27,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:27,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903064534] [2021-10-08 17:47:27,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903064534] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:27,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:27,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-08 17:47:27,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724097942] [2021-10-08 17:47:27,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 17:47:27,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 17:47:27,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:47:27,894 INFO L87 Difference]: Start difference. First operand 388 states and 1376 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) [2021-10-08 17:47:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:35,335 INFO L93 Difference]: Finished difference Result 4944 states and 17724 transitions. [2021-10-08 17:47:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 17:47:35,337 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 [2021-10-08 17:47:35,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:35,371 INFO L225 Difference]: With dead ends: 4944 [2021-10-08 17:47:35,371 INFO L226 Difference]: Without dead ends: 4944 [2021-10-08 17:47:35,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5464.1ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:47:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4944 states. [2021-10-08 17:47:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4944 to 396. [2021-10-08 17:47:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 387 states have (on average 3.5968992248062017) internal successors, (1392), 395 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1392 transitions. [2021-10-08 17:47:35,434 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1392 transitions. Word has length 8 [2021-10-08 17:47:35,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:35,434 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1392 transitions. [2021-10-08 17:47:35,434 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) [2021-10-08 17:47:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1392 transitions. [2021-10-08 17:47:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 17:47:35,435 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:35,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:47:35,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:35,648 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 [2021-10-08 17:47:35,648 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash 255062330, now seen corresponding path program 1 times [2021-10-08 17:47:35,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:35,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794286067] [2021-10-08 17:47:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:35,650 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:35,651 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) [2021-10-08 17:47:35,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 17:47:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:47:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:35,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:36,123 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 [2021-10-08 17:47:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:36,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:36,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794286067] [2021-10-08 17:47:36,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794286067] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:36,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:36,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:47:36,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499387592] [2021-10-08 17:47:36,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:47:36,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:36,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:47:36,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:47:36,197 INFO L87 Difference]: Start difference. First operand 396 states and 1392 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) [2021-10-08 17:47:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:36,807 INFO L93 Difference]: Finished difference Result 1147 states and 4093 transitions. [2021-10-08 17:47:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 17:47:36,808 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 [2021-10-08 17:47:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:36,814 INFO L225 Difference]: With dead ends: 1147 [2021-10-08 17:47:36,815 INFO L226 Difference]: Without dead ends: 1147 [2021-10-08 17:47:36,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-08 17:47:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-10-08 17:47:36,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 484. [2021-10-08 17:47:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 475 states have (on average 3.8021052631578947) internal successors, (1806), 483 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1806 transitions. [2021-10-08 17:47:36,839 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1806 transitions. Word has length 8 [2021-10-08 17:47:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:36,839 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1806 transitions. [2021-10-08 17:47:36,840 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) [2021-10-08 17:47:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1806 transitions. [2021-10-08 17:47:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 17:47:36,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:36,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:47:36,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:37,054 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 [2021-10-08 17:47:37,055 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:37,055 INFO L82 PathProgramCache]: Analyzing trace with hash -682999256, now seen corresponding path program 1 times [2021-10-08 17:47:37,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:37,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189635116] [2021-10-08 17:47:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:37,057 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:37,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:37,058 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) [2021-10-08 17:47:37,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 17:47:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:37,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 17:47:37,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:37,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:37,445 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:47:37,445 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 [2021-10-08 17:47:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:37,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:47:38,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:38,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189635116] [2021-10-08 17:47:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189635116] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:38,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:38,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:47:38,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425829250] [2021-10-08 17:47:38,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:47:38,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:47:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:47:38,206 INFO L87 Difference]: Start difference. First operand 484 states and 1806 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) [2021-10-08 17:47:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:39,501 INFO L93 Difference]: Finished difference Result 1042 states and 3816 transitions. [2021-10-08 17:47:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 17:47:39,502 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 [2021-10-08 17:47:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:39,508 INFO L225 Difference]: With dead ends: 1042 [2021-10-08 17:47:39,509 INFO L226 Difference]: Without dead ends: 1042 [2021-10-08 17:47:39,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 870.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:47:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-10-08 17:47:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 748. [2021-10-08 17:47:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 739 states have (on average 4.124492557510149) internal successors, (3048), 747 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 3048 transitions. [2021-10-08 17:47:39,551 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 3048 transitions. Word has length 9 [2021-10-08 17:47:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:39,553 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 3048 transitions. [2021-10-08 17:47:39,553 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) [2021-10-08 17:47:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 3048 transitions. [2021-10-08 17:47:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 17:47:39,554 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:39,554 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-08 17:47:39,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:39,768 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 [2021-10-08 17:47:39,768 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash -777925273, now seen corresponding path program 2 times [2021-10-08 17:47:39,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:39,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142917688] [2021-10-08 17:47:39,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:47:39,771 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:39,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:39,774 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) [2021-10-08 17:47:39,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 17:47:39,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:47:39,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:47:39,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-08 17:47:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:39,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:40,240 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:47:40,241 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 [2021-10-08 17:47:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:40,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:41,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:41,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142917688] [2021-10-08 17:47:41,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142917688] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:41,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:41,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-08 17:47:41,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487949994] [2021-10-08 17:47:41,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-08 17:47:41,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-08 17:47:41,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-08 17:47:41,914 INFO L87 Difference]: Start difference. First operand 748 states and 3048 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) [2021-10-08 17:47:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:52,008 INFO L93 Difference]: Finished difference Result 2432 states and 9316 transitions. [2021-10-08 17:47:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-08 17:47:52,012 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 [2021-10-08 17:47:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:52,024 INFO L225 Difference]: With dead ends: 2432 [2021-10-08 17:47:52,025 INFO L226 Difference]: Without dead ends: 2432 [2021-10-08 17:47:52,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4741.3ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-10-08 17:47:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-10-08 17:47:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1242. [2021-10-08 17:47:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1233 states have (on average 4.077858880778589) internal successors, (5028), 1241 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:47:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5028 transitions. [2021-10-08 17:47:52,090 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5028 transitions. Word has length 10 [2021-10-08 17:47:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:52,090 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 5028 transitions. [2021-10-08 17:47:52,090 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) [2021-10-08 17:47:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5028 transitions. [2021-10-08 17:47:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 17:47:52,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:52,092 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:47:52,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:52,306 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 [2021-10-08 17:47:52,307 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash 307293158, now seen corresponding path program 1 times [2021-10-08 17:47:52,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:52,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733766441] [2021-10-08 17:47:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:52,308 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:52,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:52,310 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) [2021-10-08 17:47:52,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 17:47:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:52,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 17:47:52,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:47:52,791 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:47:52,791 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 [2021-10-08 17:47:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:53,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:53,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:53,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733766441] [2021-10-08 17:47:53,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733766441] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:53,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:53,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 17:47:53,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891968096] [2021-10-08 17:47:53,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:47:53,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:47:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:47:53,854 INFO L87 Difference]: Start difference. First operand 1242 states and 5028 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) [2021-10-08 17:47:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:57,168 INFO L93 Difference]: Finished difference Result 2372 states and 9590 transitions. [2021-10-08 17:47:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 17:47:57,170 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 [2021-10-08 17:47:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:57,183 INFO L225 Difference]: With dead ends: 2372 [2021-10-08 17:47:57,183 INFO L226 Difference]: Without dead ends: 2372 [2021-10-08 17:47:57,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2102.7ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-08 17:47:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-10-08 17:47:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1760. [2021-10-08 17:47:57,267 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) [2021-10-08 17:47:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 7246 transitions. [2021-10-08 17:47:57,279 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 7246 transitions. Word has length 10 [2021-10-08 17:47:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:57,280 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 7246 transitions. [2021-10-08 17:47:57,280 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) [2021-10-08 17:47:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 7246 transitions. [2021-10-08 17:47:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 17:47:57,286 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:57,287 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:47:57,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-08 17:47:57,501 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 [2021-10-08 17:47:57,502 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:57,503 INFO L82 PathProgramCache]: Analyzing trace with hash 936156681, now seen corresponding path program 1 times [2021-10-08 17:47:57,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:57,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385182339] [2021-10-08 17:47:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:47:57,503 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:57,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:57,505 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) [2021-10-08 17:47:57,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 17:47:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:47:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 17:47:57,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:57,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:47:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:47:58,186 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:47:58,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385182339] [2021-10-08 17:47:58,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385182339] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:47:58,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:47:58,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 17:47:58,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028796777] [2021-10-08 17:47:58,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 17:47:58,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:47:58,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 17:47:58,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-08 17:47:58,188 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) [2021-10-08 17:47:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:47:59,115 INFO L93 Difference]: Finished difference Result 1782 states and 7190 transitions. [2021-10-08 17:47:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-08 17:47:59,116 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 [2021-10-08 17:47:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:47:59,125 INFO L225 Difference]: With dead ends: 1782 [2021-10-08 17:47:59,125 INFO L226 Difference]: Without dead ends: 1782 [2021-10-08 17:47:59,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:47:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-08 17:47:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1746. [2021-10-08 17:47:59,180 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) [2021-10-08 17:47:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 7114 transitions. [2021-10-08 17:47:59,191 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 7114 transitions. Word has length 11 [2021-10-08 17:47:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:47:59,191 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 7114 transitions. [2021-10-08 17:47:59,191 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) [2021-10-08 17:47:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 7114 transitions. [2021-10-08 17:47:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 17:47:59,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:47:59,193 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2021-10-08 17:47:59,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-08 17:47:59,410 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 [2021-10-08 17:47:59,410 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:47:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:47:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash -290420488, now seen corresponding path program 3 times [2021-10-08 17:47:59,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:47:59,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656895091] [2021-10-08 17:47:59,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:47:59,412 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:47:59,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:47:59,413 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) [2021-10-08 17:47:59,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-08 17:47:59,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 17:47:59,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:47:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-08 17:47:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:47:59,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:00,066 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:48:00,066 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 [2021-10-08 17:48:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:00,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:00,604 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 34 treesize of output 10 [2021-10-08 17:48:00,612 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 [2021-10-08 17:48:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:48:00,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:48:00,812 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 [2021-10-08 17:48:00,849 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-08 17:48:00,854 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-08 17:48:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:48:03,055 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:48:03,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656895091] [2021-10-08 17:48:03,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656895091] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:48:03,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:48:03,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-10-08 17:48:03,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993073901] [2021-10-08 17:48:03,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-08 17:48:03,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:48:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-08 17:48:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-10-08 17:48:03,058 INFO L87 Difference]: Start difference. First operand 1746 states and 7114 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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) [2021-10-08 17:48:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:48:15,729 INFO L93 Difference]: Finished difference Result 5006 states and 19410 transitions. [2021-10-08 17:48:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 17:48:15,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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 [2021-10-08 17:48:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:48:15,748 INFO L225 Difference]: With dead ends: 5006 [2021-10-08 17:48:15,749 INFO L226 Difference]: Without dead ends: 5006 [2021-10-08 17:48:15,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 7305.4ms TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2021-10-08 17:48:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-10-08 17:48:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 2714. [2021-10-08 17:48:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2705 states have (on average 4.269870609981516) internal successors, (11550), 2713 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:48:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 11550 transitions. [2021-10-08 17:48:15,888 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 11550 transitions. Word has length 12 [2021-10-08 17:48:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:48:15,888 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 11550 transitions. [2021-10-08 17:48:15,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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) [2021-10-08 17:48:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 11550 transitions. [2021-10-08 17:48:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 17:48:15,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:48:15,890 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:48:15,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-08 17:48:16,104 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 [2021-10-08 17:48:16,105 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:48:16,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:48:16,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1008388354, now seen corresponding path program 2 times [2021-10-08 17:48:16,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:48:16,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448100476] [2021-10-08 17:48:16,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:48:16,107 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:48:16,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:48:16,109 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) [2021-10-08 17:48:16,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-08 17:48:16,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:48:16,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:48:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 17:48:16,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:48:16,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:16,659 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:48:16,659 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 [2021-10-08 17:48:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:48:17,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:48:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:48:18,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:48:18,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448100476] [2021-10-08 17:48:18,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448100476] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:48:18,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:48:18,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-08 17:48:18,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675548969] [2021-10-08 17:48:18,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:48:18,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:48:18,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:48:18,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:48:18,728 INFO L87 Difference]: Start difference. First operand 2714 states and 11550 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) [2021-10-08 17:48:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:48:26,658 INFO L93 Difference]: Finished difference Result 4687 states and 19987 transitions. [2021-10-08 17:48:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-08 17:48:26,661 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 [2021-10-08 17:48:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:48:26,679 INFO L225 Difference]: With dead ends: 4687 [2021-10-08 17:48:26,679 INFO L226 Difference]: Without dead ends: 4687 [2021-10-08 17:48:26,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 5337.6ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-10-08 17:48:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2021-10-08 17:48:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3609. [2021-10-08 17:48:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3600 states have (on average 4.448611111111111) internal successors, (16015), 3608 states have internal predecessors, (16015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:48:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 16015 transitions. [2021-10-08 17:48:26,826 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 16015 transitions. Word has length 12 [2021-10-08 17:48:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:48:26,826 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 16015 transitions. [2021-10-08 17:48:26,827 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) [2021-10-08 17:48:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 16015 transitions. [2021-10-08 17:48:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 17:48:26,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:48:26,829 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:48:26,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-10-08 17:48:27,042 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 [2021-10-08 17:48:27,043 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:48:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:48:27,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1967670086, now seen corresponding path program 2 times [2021-10-08 17:48:27,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:48:27,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544666031] [2021-10-08 17:48:27,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:48:27,045 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:48:27,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:48:27,047 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) [2021-10-08 17:48:27,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-08 17:48:27,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:48:27,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:48:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-08 17:48:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:48:27,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:27,603 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:48:27,604 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 [2021-10-08 17:48:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:48:28,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:48:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:48:29,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:48:29,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544666031] [2021-10-08 17:48:29,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544666031] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:48:29,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:48:29,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-08 17:48:29,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880095673] [2021-10-08 17:48:29,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-08 17:48:29,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:48:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-08 17:48:29,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-08 17:48:29,518 INFO L87 Difference]: Start difference. First operand 3609 states and 16015 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) [2021-10-08 17:48:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:48:43,823 INFO L93 Difference]: Finished difference Result 4989 states and 20926 transitions. [2021-10-08 17:48:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-08 17:48:43,826 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 [2021-10-08 17:48:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:48:43,842 INFO L225 Difference]: With dead ends: 4989 [2021-10-08 17:48:43,844 INFO L226 Difference]: Without dead ends: 4989 [2021-10-08 17:48:43,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6273.5ms TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-10-08 17:48:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2021-10-08 17:48:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 3673. [2021-10-08 17:48:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3664 states have (on average 4.487445414847161) internal successors, (16442), 3672 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:48:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 16442 transitions. [2021-10-08 17:48:44,016 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 16442 transitions. Word has length 12 [2021-10-08 17:48:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:48:44,017 INFO L470 AbstractCegarLoop]: Abstraction has 3673 states and 16442 transitions. [2021-10-08 17:48:44,017 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) [2021-10-08 17:48:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 16442 transitions. [2021-10-08 17:48:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 17:48:44,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:48:44,019 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-08 17:48:44,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-08 17:48:44,235 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 [2021-10-08 17:48:44,235 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:48:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:48:44,236 INFO L82 PathProgramCache]: Analyzing trace with hash -581246862, now seen corresponding path program 4 times [2021-10-08 17:48:44,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:48:44,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994970162] [2021-10-08 17:48:44,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:48:44,237 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:48:44,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:48:44,238 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) [2021-10-08 17:48:44,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-08 17:48:44,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:48:44,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:48:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 17:48:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:48:44,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:48:44,793 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:48:44,794 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 [2021-10-08 17:48:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:48:45,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:48:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:48:47,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:48:47,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994970162] [2021-10-08 17:48:47,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994970162] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:48:47,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:48:47,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-08 17:48:47,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298992278] [2021-10-08 17:48:47,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-08 17:48:47,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:48:47,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-08 17:48:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-08 17:48:47,517 INFO L87 Difference]: Start difference. First operand 3673 states and 16442 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) [2021-10-08 17:49:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:49:13,337 INFO L93 Difference]: Finished difference Result 6327 states and 26761 transitions. [2021-10-08 17:49:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-08 17:49:13,339 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 [2021-10-08 17:49:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:49:13,360 INFO L225 Difference]: With dead ends: 6327 [2021-10-08 17:49:13,360 INFO L226 Difference]: Without dead ends: 6327 [2021-10-08 17:49:13,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 12572.2ms TimeCoverageRelationStatistics Valid=528, Invalid=2334, Unknown=0, NotChecked=0, Total=2862 [2021-10-08 17:49:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2021-10-08 17:49:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 3764. [2021-10-08 17:49:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3755 states have (on average 4.384287616511318) internal successors, (16463), 3763 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:49:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 16463 transitions. [2021-10-08 17:49:13,491 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 16463 transitions. Word has length 13 [2021-10-08 17:49:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:49:13,492 INFO L470 AbstractCegarLoop]: Abstraction has 3764 states and 16463 transitions. [2021-10-08 17:49:13,492 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) [2021-10-08 17:49:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 16463 transitions. [2021-10-08 17:49:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 17:49:13,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:49:13,494 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:49:13,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-08 17:49:13,710 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 [2021-10-08 17:49:13,710 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:49:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:49:13,711 INFO L82 PathProgramCache]: Analyzing trace with hash 503971569, now seen corresponding path program 2 times [2021-10-08 17:49:13,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:49:13,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966095455] [2021-10-08 17:49:13,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:49:13,713 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:49:13,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:49:13,714 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) [2021-10-08 17:49:13,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-08 17:49:14,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-08 17:49:14,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:49:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 17:49:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:49:14,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:49:14,260 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:49:14,260 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 [2021-10-08 17:49:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 17:49:14,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:49:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 17:49:15,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:49:15,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966095455] [2021-10-08 17:49:15,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966095455] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:49:15,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:49:15,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-08 17:49:15,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008278703] [2021-10-08 17:49:15,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:49:15,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:49:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:49:15,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:49:15,495 INFO L87 Difference]: Start difference. First operand 3764 states and 16463 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) [2021-10-08 17:49:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:49:16,129 INFO L93 Difference]: Finished difference Result 4358 states and 18668 transitions. [2021-10-08 17:49:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 17:49:16,135 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 [2021-10-08 17:49:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:49:16,151 INFO L225 Difference]: With dead ends: 4358 [2021-10-08 17:49:16,151 INFO L226 Difference]: Without dead ends: 4358 [2021-10-08 17:49:16,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-08 17:49:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-10-08 17:49:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 2901. [2021-10-08 17:49:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2892 states have (on average 4.200553250345782) internal successors, (12148), 2900 states have internal predecessors, (12148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:49:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 12148 transitions. [2021-10-08 17:49:16,230 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 12148 transitions. Word has length 13 [2021-10-08 17:49:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:49:16,231 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 12148 transitions. [2021-10-08 17:49:16,231 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) [2021-10-08 17:49:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 12148 transitions. [2021-10-08 17:49:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 17:49:16,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:49:16,234 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2021-10-08 17:49:16,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-08 17:49:16,448 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 [2021-10-08 17:49:16,449 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:49:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:49:16,450 INFO L82 PathProgramCache]: Analyzing trace with hash -810101177, now seen corresponding path program 5 times [2021-10-08 17:49:16,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:49:16,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310943032] [2021-10-08 17:49:16,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 17:49:16,451 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:49:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:49:16,452 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) [2021-10-08 17:49:16,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-08 17:49:16,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-08 17:49:16,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:49:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 17:49:16,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:49:16,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:49:17,123 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:49:17,123 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 [2021-10-08 17:49:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:49:17,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:49:18,128 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 [2021-10-08 17:49:18,168 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-08 17:49:18,173 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-08 17:49:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:49:21,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:49:21,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310943032] [2021-10-08 17:49:21,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310943032] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:49:21,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:49:21,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2021-10-08 17:49:21,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651965906] [2021-10-08 17:49:21,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 17:49:21,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:49:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 17:49:21,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-10-08 17:49:21,259 INFO L87 Difference]: Start difference. First operand 2901 states and 12148 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:49:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:49:27,797 INFO L93 Difference]: Finished difference Result 4199 states and 16727 transitions. [2021-10-08 17:49:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-08 17:49:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2021-10-08 17:49:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:49:27,812 INFO L225 Difference]: With dead ends: 4199 [2021-10-08 17:49:27,812 INFO L226 Difference]: Without dead ends: 4199 [2021-10-08 17:49:27,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5223.4ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-10-08 17:49:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-10-08 17:49:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3039. [2021-10-08 17:49:27,879 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) [2021-10-08 17:49:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 12842 transitions. [2021-10-08 17:49:27,897 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 12842 transitions. Word has length 14 [2021-10-08 17:49:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:49:27,898 INFO L470 AbstractCegarLoop]: Abstraction has 3039 states and 12842 transitions. [2021-10-08 17:49:27,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:49:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 12842 transitions. [2021-10-08 17:49:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 17:49:27,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:49:27,901 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:49:27,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-08 17:49:28,116 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 [2021-10-08 17:49:28,117 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:49:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:49:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1592269402, now seen corresponding path program 3 times [2021-10-08 17:49:28,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:49:28,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252137720] [2021-10-08 17:49:28,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:49:28,119 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:49:28,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:49:28,120 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) [2021-10-08 17:49:28,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-08 17:49:28,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 17:49:28,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:49:28,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 17:49:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:49:28,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:49:28,788 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:49:28,789 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 [2021-10-08 17:49:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 17:49:29,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:49:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 17:49:31,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:49:31,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252137720] [2021-10-08 17:49:31,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252137720] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:49:31,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:49:31,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-08 17:49:31,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707309340] [2021-10-08 17:49:31,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 17:49:31,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:49:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 17:49:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-08 17:49:31,489 INFO L87 Difference]: Start difference. First operand 3039 states and 12842 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) [2021-10-08 17:49:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:49:32,850 INFO L93 Difference]: Finished difference Result 3187 states and 13157 transitions. [2021-10-08 17:49:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 17:49:32,852 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 [2021-10-08 17:49:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:49:32,862 INFO L225 Difference]: With dead ends: 3187 [2021-10-08 17:49:32,863 INFO L226 Difference]: Without dead ends: 3187 [2021-10-08 17:49:32,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1207.1ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:49:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-10-08 17:49:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2077. [2021-10-08 17:49:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2072 states have (on average 4.056467181467181) internal successors, (8405), 2076 states have internal predecessors, (8405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:49:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 8405 transitions. [2021-10-08 17:49:32,956 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 8405 transitions. Word has length 14 [2021-10-08 17:49:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:49:32,959 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 8405 transitions. [2021-10-08 17:49:32,959 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) [2021-10-08 17:49:32,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 8405 transitions. [2021-10-08 17:49:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 17:49:32,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:49:32,963 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:49:32,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-08 17:49:33,176 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 [2021-10-08 17:49:33,177 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:49:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:49:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1265232291, now seen corresponding path program 3 times [2021-10-08 17:49:33,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:49:33,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326331618] [2021-10-08 17:49:33,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:49:33,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:49:33,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:49:33,181 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) [2021-10-08 17:49:33,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-08 17:49:33,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-08 17:49:33,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:49:33,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 17:49:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:49:33,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:49:33,937 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:49:33,938 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 [2021-10-08 17:49:34,102 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 15 treesize of output 11 [2021-10-08 17:49:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 17:49:34,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:49:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 17:49:34,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:49:34,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326331618] [2021-10-08 17:49:34,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326331618] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:49:34,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:49:34,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-08 17:49:34,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765604820] [2021-10-08 17:49:34,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 17:49:34,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:49:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 17:49:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-08 17:49:34,834 INFO L87 Difference]: Start difference. First operand 2077 states and 8405 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) [2021-10-08 17:49:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:49:37,727 INFO L93 Difference]: Finished difference Result 2223 states and 8663 transitions. [2021-10-08 17:49:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 17:49:37,728 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 [2021-10-08 17:49:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:49:37,735 INFO L225 Difference]: With dead ends: 2223 [2021-10-08 17:49:37,735 INFO L226 Difference]: Without dead ends: 2223 [2021-10-08 17:49:37,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1540.3ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-08 17:49:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-10-08 17:49:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 2091. [2021-10-08 17:49:37,784 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) [2021-10-08 17:49:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 8381 transitions. [2021-10-08 17:49:37,796 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 8381 transitions. Word has length 14 [2021-10-08 17:49:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:49:37,796 INFO L470 AbstractCegarLoop]: Abstraction has 2091 states and 8381 transitions. [2021-10-08 17:49:37,796 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) [2021-10-08 17:49:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 8381 transitions. [2021-10-08 17:49:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 17:49:37,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:49:37,804 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:49:37,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-08 17:49:38,020 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 [2021-10-08 17:49:38,021 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:49:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:49:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1938278139, now seen corresponding path program 4 times [2021-10-08 17:49:38,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:49:38,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033162710] [2021-10-08 17:49:38,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:49:38,023 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:49:38,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:49:38,025 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) [2021-10-08 17:49:38,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-08 17:49:38,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:49:38,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:49:38,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-08 17:49:38,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:49:38,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:49:38,634 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:49:38,635 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 [2021-10-08 17:49:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:49:39,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:49:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:49:42,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:49:42,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033162710] [2021-10-08 17:49:42,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033162710] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:49:42,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:49:42,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-08 17:49:42,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507157237] [2021-10-08 17:49:42,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-08 17:49:42,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:49:42,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-08 17:49:42,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-08 17:49:42,010 INFO L87 Difference]: Start difference. First operand 2091 states and 8381 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) [2021-10-08 17:50:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:50:06,254 INFO L93 Difference]: Finished difference Result 4349 states and 16239 transitions. [2021-10-08 17:50:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-08 17:50:06,256 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 [2021-10-08 17:50:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:50:06,272 INFO L225 Difference]: With dead ends: 4349 [2021-10-08 17:50:06,272 INFO L226 Difference]: Without dead ends: 4349 [2021-10-08 17:50:06,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 13465.8ms TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2021-10-08 17:50:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-10-08 17:50:06,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 2961. [2021-10-08 17:50:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2956 states have (on average 4.25) internal successors, (12563), 2960 states have internal predecessors, (12563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:50:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 12563 transitions. [2021-10-08 17:50:06,373 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 12563 transitions. Word has length 15 [2021-10-08 17:50:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:50:06,374 INFO L470 AbstractCegarLoop]: Abstraction has 2961 states and 12563 transitions. [2021-10-08 17:50:06,374 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) [2021-10-08 17:50:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 12563 transitions. [2021-10-08 17:50:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 17:50:06,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:50:06,378 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:50:06,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-08 17:50:06,592 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 [2021-10-08 17:50:06,592 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:50:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:50:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash -687481528, now seen corresponding path program 5 times [2021-10-08 17:50:06,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:50:06,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349340439] [2021-10-08 17:50:06,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 17:50:06,594 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:50:06,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:50:06,595 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) [2021-10-08 17:50:06,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-08 17:50:07,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-08 17:50:07,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:50:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 17:50:07,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:50:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:50:07,332 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:50:07,333 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 [2021-10-08 17:50:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:50:07,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:50:08,192 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 [2021-10-08 17:50:08,239 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-08 17:50:08,242 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-08 17:50:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:50:10,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:50:10,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349340439] [2021-10-08 17:50:10,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349340439] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:50:10,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:50:10,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-10-08 17:50:10,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750565385] [2021-10-08 17:50:10,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-08 17:50:10,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:50:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-08 17:50:10,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:50:10,987 INFO L87 Difference]: Start difference. First operand 2961 states and 12563 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-10-08 17:50:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:50:17,029 INFO L93 Difference]: Finished difference Result 3583 states and 13903 transitions. [2021-10-08 17:50:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-08 17:50:17,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 [2021-10-08 17:50:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:50:17,044 INFO L225 Difference]: With dead ends: 3583 [2021-10-08 17:50:17,044 INFO L226 Difference]: Without dead ends: 3583 [2021-10-08 17:50:17,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4373.0ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-10-08 17:50:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-10-08 17:50:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 2807. [2021-10-08 17:50:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2802 states have (on average 4.210920770877944) internal successors, (11799), 2806 states have internal predecessors, (11799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:50:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 11799 transitions. [2021-10-08 17:50:17,154 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 11799 transitions. Word has length 15 [2021-10-08 17:50:17,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:50:17,154 INFO L470 AbstractCegarLoop]: Abstraction has 2807 states and 11799 transitions. [2021-10-08 17:50:17,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-10-08 17:50:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 11799 transitions. [2021-10-08 17:50:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:50:17,159 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:50:17,159 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-08 17:50:17,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-08 17:50:17,373 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 [2021-10-08 17:50:17,374 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:50:17,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:50:17,374 INFO L82 PathProgramCache]: Analyzing trace with hash 897916751, now seen corresponding path program 3 times [2021-10-08 17:50:17,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:50:17,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571590539] [2021-10-08 17:50:17,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:50:17,376 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:50:17,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:50:17,377 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) [2021-10-08 17:50:17,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-08 17:50:17,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-08 17:50:17,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:50:17,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-08 17:50:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:50:18,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:50:18,255 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:50:18,256 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 [2021-10-08 17:50:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:50:19,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:50:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:50:24,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:50:24,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571590539] [2021-10-08 17:50:24,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571590539] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:50:24,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:50:24,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-08 17:50:24,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868521090] [2021-10-08 17:50:24,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-08 17:50:24,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:50:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-08 17:50:24,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-08 17:50:24,690 INFO L87 Difference]: Start difference. First operand 2807 states and 11799 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) [2021-10-08 17:50:36,971 WARN L207 SmtUtils]: Spent 9.29 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-08 17:50:45,987 WARN L207 SmtUtils]: Spent 8.09 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-08 17:51:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:51:25,207 INFO L93 Difference]: Finished difference Result 55766 states and 247472 transitions. [2021-10-08 17:51:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-08 17:51:25,213 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 [2021-10-08 17:51:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:51:26,088 INFO L225 Difference]: With dead ends: 55766 [2021-10-08 17:51:26,089 INFO L226 Difference]: Without dead ends: 55766 [2021-10-08 17:51:26,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 53196.6ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-08 17:51:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55766 states. [2021-10-08 17:51:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55766 to 2823. [2021-10-08 17:51:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2818 states have (on average 4.198367636621717) internal successors, (11831), 2822 states have internal predecessors, (11831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:51:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 11831 transitions. [2021-10-08 17:51:27,154 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 11831 transitions. Word has length 16 [2021-10-08 17:51:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:51:27,155 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 11831 transitions. [2021-10-08 17:51:27,155 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) [2021-10-08 17:51:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 11831 transitions. [2021-10-08 17:51:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:51:27,177 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:51:27,177 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2021-10-08 17:51:27,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-08 17:51:27,392 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 [2021-10-08 17:51:27,392 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:51:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:51:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash 504727218, now seen corresponding path program 6 times [2021-10-08 17:51:27,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:51:27,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580276224] [2021-10-08 17:51:27,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 17:51:27,394 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:51:27,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:51:27,395 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) [2021-10-08 17:51:27,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-08 17:51:28,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-08 17:51:28,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:51:28,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-08 17:51:28,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:51:28,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:51:28,543 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:51:28,543 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 [2021-10-08 17:51:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:51:29,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:51:30,007 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 [2021-10-08 17:51:30,082 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-08 17:51:30,086 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-08 17:51:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:51:37,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:51:37,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580276224] [2021-10-08 17:51:37,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580276224] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:51:37,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:51:37,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 33 [2021-10-08 17:51:37,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262723422] [2021-10-08 17:51:37,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-08 17:51:37,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:51:37,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-08 17:51:37,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-10-08 17:51:37,165 INFO L87 Difference]: Start difference. First operand 2823 states and 11831 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:52:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:52:11,674 INFO L93 Difference]: Finished difference Result 8749 states and 34613 transitions. [2021-10-08 17:52:11,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-08 17:52:11,677 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-10-08 17:52:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:52:11,704 INFO L225 Difference]: With dead ends: 8749 [2021-10-08 17:52:11,704 INFO L226 Difference]: Without dead ends: 8749 [2021-10-08 17:52:11,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 22160.6ms TimeCoverageRelationStatistics Valid=943, Invalid=4027, Unknown=0, NotChecked=0, Total=4970 [2021-10-08 17:52:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8749 states. [2021-10-08 17:52:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8749 to 4517. [2021-10-08 17:52:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4512 states have (on average 4.190602836879433) internal successors, (18908), 4516 states have internal predecessors, (18908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:52:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 18908 transitions. [2021-10-08 17:52:11,943 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 18908 transitions. Word has length 19 [2021-10-08 17:52:11,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:52:11,944 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 18908 transitions. [2021-10-08 17:52:11,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:52:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 18908 transitions. [2021-10-08 17:52:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:52:11,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:52:11,951 INFO L512 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1] [2021-10-08 17:52:11,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-08 17:52:12,161 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 [2021-10-08 17:52:12,162 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:52:12,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:52:12,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1728640317, now seen corresponding path program 7 times [2021-10-08 17:52:12,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:52:12,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691511919] [2021-10-08 17:52:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 17:52:12,164 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:52:12,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:52:12,165 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) [2021-10-08 17:52:12,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-08 17:52:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:52:12,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-08 17:52:12,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:52:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:52:12,927 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:52:12,927 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 [2021-10-08 17:52:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 17:52:13,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:52:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:52:19,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:52:19,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691511919] [2021-10-08 17:52:19,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691511919] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:52:19,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:52:19,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 36 [2021-10-08 17:52:19,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615402693] [2021-10-08 17:52:19,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-08 17:52:19,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:52:19,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-08 17:52:19,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2021-10-08 17:52:19,990 INFO L87 Difference]: Start difference. First operand 4517 states and 18908 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 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) [2021-10-08 17:53:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:53:13,292 INFO L93 Difference]: Finished difference Result 10542 states and 41812 transitions. [2021-10-08 17:53:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-08 17:53:13,296 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 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 [2021-10-08 17:53:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:53:13,330 INFO L225 Difference]: With dead ends: 10542 [2021-10-08 17:53:13,330 INFO L226 Difference]: Without dead ends: 10542 [2021-10-08 17:53:13,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2183 ImplicationChecksByTransitivity, 28451.1ms TimeCoverageRelationStatistics Valid=1733, Invalid=7579, Unknown=0, NotChecked=0, Total=9312 [2021-10-08 17:53:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10542 states. [2021-10-08 17:53:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10542 to 5492. [2021-10-08 17:53:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5487 states have (on average 4.227264443229451) internal successors, (23195), 5491 states have internal predecessors, (23195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:53:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 23195 transitions. [2021-10-08 17:53:13,535 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 23195 transitions. Word has length 21 [2021-10-08 17:53:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:53:13,535 INFO L470 AbstractCegarLoop]: Abstraction has 5492 states and 23195 transitions. [2021-10-08 17:53:13,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 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) [2021-10-08 17:53:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 23195 transitions. [2021-10-08 17:53:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 17:53:13,543 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:53:13,543 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:53:13,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-08 17:53:13,752 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 [2021-10-08 17:53:13,752 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:53:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:53:13,754 INFO L82 PathProgramCache]: Analyzing trace with hash 50396677, now seen corresponding path program 6 times [2021-10-08 17:53:13,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:53:13,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796892580] [2021-10-08 17:53:13,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 17:53:13,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:53:13,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:53:13,757 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) [2021-10-08 17:53:13,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-08 17:53:14,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-08 17:53:14,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:53:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-08 17:53:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:53:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:53:15,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:53:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:53:16,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:53:16,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796892580] [2021-10-08 17:53:16,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796892580] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:53:16,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:53:16,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-10-08 17:53:16,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328635758] [2021-10-08 17:53:16,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-08 17:53:16,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:53:16,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-08 17:53:16,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-10-08 17:53:16,403 INFO L87 Difference]: Start difference. First operand 5492 states and 23195 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:53:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:53:33,975 INFO L93 Difference]: Finished difference Result 9373 states and 34769 transitions. [2021-10-08 17:53:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-08 17:53:33,977 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-10-08 17:53:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:53:34,004 INFO L225 Difference]: With dead ends: 9373 [2021-10-08 17:53:34,004 INFO L226 Difference]: Without dead ends: 9373 [2021-10-08 17:53:34,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 11105.8ms TimeCoverageRelationStatistics Valid=1426, Invalid=4426, Unknown=0, NotChecked=0, Total=5852 [2021-10-08 17:53:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-10-08 17:53:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 6007. [2021-10-08 17:53:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6007 states, 6002 states have (on average 4.273408863712096) internal successors, (25649), 6006 states have internal predecessors, (25649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:53:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6007 states to 6007 states and 25649 transitions. [2021-10-08 17:53:34,243 INFO L78 Accepts]: Start accepts. Automaton has 6007 states and 25649 transitions. Word has length 21 [2021-10-08 17:53:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:53:34,244 INFO L470 AbstractCegarLoop]: Abstraction has 6007 states and 25649 transitions. [2021-10-08 17:53:34,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:53:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 6007 states and 25649 transitions. [2021-10-08 17:53:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-08 17:53:34,253 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:53:34,253 INFO L512 BasicCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1] [2021-10-08 17:53:34,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-10-08 17:53:34,462 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 [2021-10-08 17:53:34,463 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:53:34,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:53:34,463 INFO L82 PathProgramCache]: Analyzing trace with hash -771356142, now seen corresponding path program 8 times [2021-10-08 17:53:34,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:53:34,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741520884] [2021-10-08 17:53:34,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:53:34,465 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:53:34,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:53:34,467 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) [2021-10-08 17:53:34,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-08 17:53:35,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:53:35,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:53:35,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-08 17:53:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:53:35,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:53:35,325 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-08 17:53:35,326 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 [2021-10-08 17:53:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:53:36,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:53:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:53:44,224 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:53:44,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741520884] [2021-10-08 17:53:44,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741520884] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:53:44,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:53:44,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2021-10-08 17:53:44,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727486089] [2021-10-08 17:53:44,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-08 17:53:44,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:53:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-08 17:53:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1464, Unknown=0, NotChecked=0, Total=1892 [2021-10-08 17:53:44,228 INFO L87 Difference]: Start difference. First operand 6007 states and 25649 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:54:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:54:58,367 INFO L93 Difference]: Finished difference Result 16405 states and 66055 transitions. [2021-10-08 17:54:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-08 17:54:58,371 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2021-10-08 17:54:58,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:54:58,431 INFO L225 Difference]: With dead ends: 16405 [2021-10-08 17:54:58,432 INFO L226 Difference]: Without dead ends: 16405 [2021-10-08 17:54:58,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3110 ImplicationChecksByTransitivity, 36171.5ms TimeCoverageRelationStatistics Valid=2912, Invalid=8008, Unknown=0, NotChecked=0, Total=10920 [2021-10-08 17:54:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16405 states. [2021-10-08 17:54:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16405 to 9355. [2021-10-08 17:54:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9355 states, 9350 states have (on average 4.486951871657754) internal successors, (41953), 9354 states have internal predecessors, (41953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:54:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9355 states to 9355 states and 41953 transitions. [2021-10-08 17:54:58,850 INFO L78 Accepts]: Start accepts. Automaton has 9355 states and 41953 transitions. Word has length 23 [2021-10-08 17:54:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:54:58,850 INFO L470 AbstractCegarLoop]: Abstraction has 9355 states and 41953 transitions. [2021-10-08 17:54:58,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:54:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 9355 states and 41953 transitions. [2021-10-08 17:54:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-08 17:54:58,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:54:58,860 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] [2021-10-08 17:54:58,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-08 17:54:59,061 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 [2021-10-08 17:54:59,061 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-08 17:54:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:54:59,062 INFO L82 PathProgramCache]: Analyzing trace with hash 449017612, now seen corresponding path program 1 times [2021-10-08 17:54:59,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:54:59,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238429697] [2021-10-08 17:54:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:54:59,064 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:54:59,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:54:59,065 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) [2021-10-08 17:54:59,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-08 17:54:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:54:59,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-08 17:54:59,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:54:59,943 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 157 treesize of output 149 [2021-10-08 17:55:00,306 INFO L354 Elim1Store]: treesize reduction 163, result has 15.1 percent of original size [2021-10-08 17:55:00,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-10-08 17:55:09,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:09,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:09,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:09,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:09,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:09,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:09,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:09,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 17:55:09,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:09,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 17:55:09,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 17:55:10,537 INFO L354 Elim1Store]: treesize reduction 916, result has 17.7 percent of original size [2021-10-08 17:55:10,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 203 treesize of output 319 [2021-10-08 17:55:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:22,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:22,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:22,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 17:55:22,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:22,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 17:55:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:55:22,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 17:55:22,975 INFO L354 Elim1Store]: treesize reduction 158, result has 33.3 percent of original size [2021-10-08 17:55:22,976 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 36 case distinctions, treesize of input 197 treesize of output 201 [2021-10-08 17:56:16,739 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 384 treesize of output 376 [2021-10-08 17:56:17,101 INFO L354 Elim1Store]: treesize reduction 822, result has 5.2 percent of original size [2021-10-08 17:56:17,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 376 treesize of output 250 [2021-10-08 17:56:17,113 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 226 treesize of output 218 [2021-10-08 17:56:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:56:18,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:56:35,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:56:35,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238429697] [2021-10-08 17:56:35,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-10-08 17:56:35,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1473464656] [2021-10-08 17:56:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:56:35,456 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 17:56:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 17:56:35,458 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 17:56:35,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-08 17:56:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:56:36,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-08 17:56:36,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:56:37,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:37,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:37,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:37,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:37,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:37,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2021-10-08 17:56:39,727 INFO L354 Elim1Store]: treesize reduction 68, result has 29.9 percent of original size [2021-10-08 17:56:39,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 89 [2021-10-08 17:56:50,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:50,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:50,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:50,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 17:56:50,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:50,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:50,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:50,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 17:56:50,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 17:56:50,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-08 17:56:51,920 INFO L354 Elim1Store]: treesize reduction 1479, result has 12.9 percent of original size [2021-10-08 17:56:51,920 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 205 treesize of output 321 Received shutdown request... [2021-10-08 18:00:07,828 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-10-08 18:00:07,831 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:00:07,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-10-08 18:00:07,840 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 18:00:07,857 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 [2021-10-08 18:00:07,858 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-08 18:00:08,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-08 18:00:08,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 18:00:08,236 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 10 for 6ms.. [2021-10-08 18:00:08,239 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:00:08,239 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:00:08,240 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-08 18:00:08,240 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-08 18:00:08,240 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:00:08,240 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:00:08,241 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-08 18:00:08,241 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-08 18:00:08,241 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-08 18:00:08,241 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-08 18:00:08,241 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-08 18:00:08,241 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-08 18:00:08,241 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 18:00:08,242 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 18:00:08,242 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 18:00:08,242 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 18:00:08,242 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 18:00:08,242 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 18:00:08,242 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 18:00:08,242 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 18:00:08,242 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 18:00:08,242 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 18:00:08,243 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-08 18:00:08,243 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-08 18:00:08,243 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-08 18:00:08,243 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-08 18:00:08,243 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 18:00:08,243 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 18:00:08,243 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 18:00:08,243 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-08 18:00:08,243 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-08 18:00:08,244 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-08 18:00:08,244 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-08 18:00:08,244 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-08 18:00:08,244 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-08 18:00:08,244 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-08 18:00:08,244 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-08 18:00:08,244 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-08 18:00:08,244 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-08 18:00:08,244 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-08 18:00:08,245 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-08 18:00:08,245 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-08 18:00:08,251 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 18:00:08,251 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 18:00:08,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 06:00:08 BasicIcfg [2021-10-08 18:00:08,253 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 18:00:08,254 INFO L168 Benchmark]: Toolchain (without parser) took 829827.20 ms. Allocated memory was 169.9 MB in the beginning and 460.3 MB in the end (delta: 290.5 MB). Free memory was 144.9 MB in the beginning and 132.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 357.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:00:08,255 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 169.9 MB. Free memory is still 142.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 18:00:08,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.41 ms. Allocated memory is still 169.9 MB. Free memory was 144.4 MB in the beginning and 131.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-08 18:00:08,255 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.30 ms. Allocated memory is still 169.9 MB. Free memory was 131.3 MB in the beginning and 129.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-08 18:00:08,256 INFO L168 Benchmark]: Boogie Preprocessor took 44.06 ms. Allocated memory is still 169.9 MB. Free memory was 129.8 MB in the beginning and 127.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 18:00:08,256 INFO L168 Benchmark]: RCFGBuilder took 1576.59 ms. Allocated memory is still 169.9 MB. Free memory was 127.7 MB in the beginning and 95.2 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-10-08 18:00:08,257 INFO L168 Benchmark]: TraceAbstraction took 827743.60 ms. Allocated memory was 169.9 MB in the beginning and 460.3 MB in the end (delta: 290.5 MB). Free memory was 94.5 MB in the beginning and 132.1 MB in the end (delta: -37.6 MB). Peak memory consumption was 306.8 MB. Max. memory is 8.0 GB. [2021-10-08 18:00:08,259 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 169.9 MB. Free memory is still 142.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 392.41 ms. Allocated memory is still 169.9 MB. Free memory was 144.4 MB in the beginning and 131.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 52.30 ms. Allocated memory is still 169.9 MB. Free memory was 131.3 MB in the beginning and 129.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.06 ms. Allocated memory is still 169.9 MB. Free memory was 129.8 MB in the beginning and 127.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1576.59 ms. Allocated memory is still 169.9 MB. Free memory was 127.7 MB in the beginning and 95.2 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 827743.60 ms. Allocated memory was 169.9 MB in the beginning and 460.3 MB in the end (delta: 290.5 MB). Free memory was 94.5 MB in the beginning and 132.1 MB in the end (delta: -37.6 MB). Peak memory consumption was 306.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 27107.6ms, 169 PlacesBefore, 61 PlacesAfterwards, 172 TransitionsBefore, 55 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 7 FixpointIterations, 92 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 181 TotalNumberOfCompositions, 3569 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3306, positive: 3275, positive conditional: 0, positive unconditional: 3275, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1349, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1349, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 9, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 762, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 762, negative conditional: 0, negative unconditional: 762, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3306, positive: 1935, positive conditional: 0, positive unconditional: 1935, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 1349, unknown conditional: 0, unknown unconditional: 1349] , Statistics on independence cache: Total cache size (in pairs): 150, Positive cache size: 148, Positive conditional cache size: 0, Positive unconditional cache size: 148, 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - 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 10 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 202 locations, 43 error locations. Started 1 CEGAR loops. OverallTime: 827584.4ms, OverallIterations: 35, TraceHistogramMax: 14, EmptinessCheckTime: 115.8ms, AutomataDifference: 373527.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27248.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2277 SDtfs, 27469 SDslu, 27511 SDs, 0 SdLazy, 36905 SolverSat, 1481 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 177057.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1046 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9757 ImplicationChecksByTransitivity, 225958.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9355occurred in iteration=34, InterpolantAutomatonStates: 616, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4054.5ms AutomataMinimizationTime, 34 MinimizatonAttempts, 97891 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 312.1ms SsaConstructionTime, 3975.1ms SatisfiabilityAnalysisTime, 96721.9ms InterpolantComputationTime, 349 NumberOfCodeBlocks, 343 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 630 ConstructedInterpolants, 119 QuantifiedInterpolants, 14616 SizeOfPredicates, 406 NumberOfNonLiveVariables, 2762 ConjunctsInSsa, 558 ConjunctsInUnsatCore, 68 InterpolantComputations, 17 PerfectInterpolantSequences, 199/1248 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