/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-simple-array-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:35:47,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:35:47,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:35:47,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 21:35:47,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:35:47,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:35:47,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:35:47,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:35:47,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:35:47,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:35:47,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:35:47,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:35:47,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:35:47,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:35:47,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:35:47,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:35:47,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 21:35:47,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:35:47,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:35:47,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:35:47,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 21:35:47,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:35:47,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:35:47,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:35:47,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:35:47,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:35:47,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:35:47,723 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:35:47,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:35:47,723 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:35:47,724 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:35:47,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:35:47,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:35:47,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:35:47,725 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:35:47,726 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:35:47,726 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:35:47,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:35:47,726 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:35:47,727 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:35:47,727 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:35:47,727 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:35:47,728 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:35:47,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:35:47,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:35:47,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:35:47,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:35:47,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:35:47,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:35:47,729 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:35:47,729 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:35:47,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:35:47,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:35:47,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:35:48,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:35:48,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:35:48,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:35:48,158 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:35:48,159 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:35:48,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-13 21:35:48,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecdddeac7/c29c84027ded4335919c24323cf593af/FLAGf321af01d [2021-10-13 21:35:48,934 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:35:48,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-10-13 21:35:48,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecdddeac7/c29c84027ded4335919c24323cf593af/FLAGf321af01d [2021-10-13 21:35:49,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecdddeac7/c29c84027ded4335919c24323cf593af [2021-10-13 21:35:49,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:35:49,287 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:35:49,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:35:49,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:35:49,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:35:49,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478a32af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49, skipping insertion in model container [2021-10-13 21:35:49,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:35:49,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:35:49,528 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-simple-array-sum.wvr.c[2423,2436] [2021-10-13 21:35:49,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:35:49,575 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 21:35:49,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:35:49,610 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-simple-array-sum.wvr.c[2423,2436] [2021-10-13 21:35:49,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:35:49,622 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:35:49,649 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-simple-array-sum.wvr.c[2423,2436] [2021-10-13 21:35:49,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:35:49,676 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:35:49,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49 WrapperNode [2021-10-13 21:35:49,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:35:49,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:35:49,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:35:49,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:35:49,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:35:49,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:35:49,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:35:49,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:35:49,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:35:49,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:35:49,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:35:49,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:35:49,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (1/1) ... [2021-10-13 21:35:49,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:35:49,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:35:49,826 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) [2021-10-13 21:35:49,843 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 [2021-10-13 21:35:49,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:35:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:35:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:35:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:35:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:35:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:35:49,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:35:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 21:35:49,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 21:35:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 21:35:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:35:49,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:35:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:35:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:35:49,902 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 21:35:50,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:35:50,730 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-13 21:35:50,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:35:50 BoogieIcfgContainer [2021-10-13 21:35:50,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:35:50,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:35:50,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:35:50,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:35:50,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:35:49" (1/3) ... [2021-10-13 21:35:50,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198f96bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:35:50, skipping insertion in model container [2021-10-13 21:35:50,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:35:49" (2/3) ... [2021-10-13 21:35:50,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198f96bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:35:50, skipping insertion in model container [2021-10-13 21:35:50,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:35:50" (3/3) ... [2021-10-13 21:35:50,752 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2021-10-13 21:35:50,759 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:35:50,759 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-10-13 21:35:50,759 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:35:50,822 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,823 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,823 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,823 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,823 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,824 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,824 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,824 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,824 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,824 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,825 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,825 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,825 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,825 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,826 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,826 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,826 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,826 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,827 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,827 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,827 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,827 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,827 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,828 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,828 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,828 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,828 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,828 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,829 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,829 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,829 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,829 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,830 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,830 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,830 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,830 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,831 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,832 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,832 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,832 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,833 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,833 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,833 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,833 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,834 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,834 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,834 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,835 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,835 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,835 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,835 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,835 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,836 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,836 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,836 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,836 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,836 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,837 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,837 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,837 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,837 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,837 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,838 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,838 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,838 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,838 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,839 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,839 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,839 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,839 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,840 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,840 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,840 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,840 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,840 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,841 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,841 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,841 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,841 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,842 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,842 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,842 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,842 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,843 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,843 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,843 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,843 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,843 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,844 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,844 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,844 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,844 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,844 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,845 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,845 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,845 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,849 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,849 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,850 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,850 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,850 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,860 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,860 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,860 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,861 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,861 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,868 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,868 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,868 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,868 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:35:50,879 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-13 21:35:50,932 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:35:50,941 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 [2021-10-13 21:35:50,941 INFO L340 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2021-10-13 21:35:50,965 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:35:50,979 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 198 transitions, 420 flow [2021-10-13 21:35:50,982 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 198 transitions, 420 flow [2021-10-13 21:35:50,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 192 places, 198 transitions, 420 flow [2021-10-13 21:35:51,103 INFO L129 PetriNetUnfolder]: 16/195 cut-off events. [2021-10-13 21:35:51,103 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-13 21:35:51,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 195 events. 16/195 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 233 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 145. Up to 3 conditions per place. [2021-10-13 21:35:51,120 INFO L116 LiptonReduction]: Number of co-enabled transitions 3148 [2021-10-13 21:36:20,325 INFO L131 LiptonReduction]: Checked pairs total: 5730 [2021-10-13 21:36:20,325 INFO L133 LiptonReduction]: Total number of compositions: 208 [2021-10-13 21:36:20,338 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 59 transitions, 142 flow [2021-10-13 21:36:20,443 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1533 states, 1319 states have (on average 4.216072782410917) internal successors, (5561), 1532 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 1533 states, 1319 states have (on average 4.216072782410917) internal successors, (5561), 1532 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:36:20,473 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:20,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:36:20,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:36:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:20,482 INFO L82 PathProgramCache]: Analyzing trace with hash 24037, now seen corresponding path program 1 times [2021-10-13 21:36:20,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:20,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985267677] [2021-10-13 21:36:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:36:20,498 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:20,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:20,502 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) [2021-10-13 21:36:20,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 21:36:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:36:20,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:36:20,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:20,824 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:36:20,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 21:36:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:20,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:20,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:20,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985267677] [2021-10-13 21:36:20,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985267677] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:36:20,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:36:20,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:36:20,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582612956] [2021-10-13 21:36:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:36:20,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:20,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:36:20,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:36:20,981 INFO L87 Difference]: Start difference. First operand has 1533 states, 1319 states have (on average 4.216072782410917) internal successors, (5561), 1532 states have internal predecessors, (5561), 0 states have call successors, (0), 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 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) [2021-10-13 21:36:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:21,320 INFO L93 Difference]: Finished difference Result 1530 states and 5558 transitions. [2021-10-13 21:36:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:36:21,322 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 [2021-10-13 21:36:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:21,369 INFO L225 Difference]: With dead ends: 1530 [2021-10-13 21:36:21,369 INFO L226 Difference]: Without dead ends: 1530 [2021-10-13 21:36:21,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:36:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-10-13 21:36:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1530. [2021-10-13 21:36:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1319 states have (on average 4.21379833206975) internal successors, (5558), 1529 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5558 transitions. [2021-10-13 21:36:21,557 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5558 transitions. Word has length 2 [2021-10-13 21:36:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:21,558 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 5558 transitions. [2021-10-13 21:36:21,558 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) [2021-10-13 21:36:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5558 transitions. [2021-10-13 21:36:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:36:21,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:21,559 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:36:21,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:21,775 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 [2021-10-13 21:36:21,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:36:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:21,778 INFO L82 PathProgramCache]: Analyzing trace with hash 24038, now seen corresponding path program 1 times [2021-10-13 21:36:21,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:21,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878263559] [2021-10-13 21:36:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:36:21,780 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:21,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:21,785 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) [2021-10-13 21:36:21,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 21:36:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:36:21,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:36:21,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:22,270 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:36:22,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2021-10-13 21:36:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:22,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:22,492 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:22,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878263559] [2021-10-13 21:36:22,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878263559] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:36:22,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:36:22,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:36:22,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103230295] [2021-10-13 21:36:22,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:36:22,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:36:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:36:22,497 INFO L87 Difference]: Start difference. First operand 1530 states and 5558 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) [2021-10-13 21:36:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:23,299 INFO L93 Difference]: Finished difference Result 3059 states and 11119 transitions. [2021-10-13 21:36:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:36:23,301 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 [2021-10-13 21:36:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:23,337 INFO L225 Difference]: With dead ends: 3059 [2021-10-13 21:36:23,337 INFO L226 Difference]: Without dead ends: 3059 [2021-10-13 21:36:23,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:36:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2021-10-13 21:36:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 1534. [2021-10-13 21:36:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1323 states have (on average 4.210128495842781) internal successors, (5570), 1533 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5570 transitions. [2021-10-13 21:36:23,435 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5570 transitions. Word has length 2 [2021-10-13 21:36:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:23,435 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 5570 transitions. [2021-10-13 21:36:23,435 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) [2021-10-13 21:36:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5570 transitions. [2021-10-13 21:36:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:36:23,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:23,437 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:36:23,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:23,649 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 [2021-10-13 21:36:23,650 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:36:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:23,652 INFO L82 PathProgramCache]: Analyzing trace with hash 750499, now seen corresponding path program 1 times [2021-10-13 21:36:23,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:23,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580260649] [2021-10-13 21:36:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:36:23,653 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:23,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:23,654 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) [2021-10-13 21:36:23,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 21:36:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:36:23,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:36:23,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:24,202 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-13 21:36:24,203 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 51 treesize of output 97 [2021-10-13 21:36:24,223 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 21:36:24,223 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 100 treesize of output 96 [2021-10-13 21:36:26,114 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-13 21:36:26,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 99 [2021-10-13 21:36:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:38,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:38,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:38,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580260649] [2021-10-13 21:36:38,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580260649] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:36:38,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:36:38,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:36:38,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136026915] [2021-10-13 21:36:38,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:36:38,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:38,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:36:38,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-13 21:36:38,231 INFO L87 Difference]: Start difference. First operand 1534 states and 5570 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:46,639 INFO L93 Difference]: Finished difference Result 1263 states and 4442 transitions. [2021-10-13 21:36:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:36:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 21:36:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:46,666 INFO L225 Difference]: With dead ends: 1263 [2021-10-13 21:36:46,666 INFO L226 Difference]: Without dead ends: 1263 [2021-10-13 21:36:46,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2294.0ms TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-10-13 21:36:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-10-13 21:36:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1263. [2021-10-13 21:36:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1098 states have (on average 4.045537340619308) internal successors, (4442), 1262 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4442 transitions. [2021-10-13 21:36:46,730 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4442 transitions. Word has length 3 [2021-10-13 21:36:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:46,730 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 4442 transitions. [2021-10-13 21:36:46,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4442 transitions. [2021-10-13 21:36:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:36:46,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:46,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:36:46,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:46,943 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 [2021-10-13 21:36:46,946 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:36:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 750500, now seen corresponding path program 1 times [2021-10-13 21:36:46,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:46,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623276889] [2021-10-13 21:36:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:36:46,948 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:46,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:46,950 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) [2021-10-13 21:36:46,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 21:36:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:36:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 21:36:47,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:47,143 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-13 21:36:47,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 59 [2021-10-13 21:36:47,386 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-10-13 21:36:47,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 86 [2021-10-13 21:36:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:47,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:47,903 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:47,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623276889] [2021-10-13 21:36:47,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623276889] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:36:47,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:36:47,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:36:47,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381469590] [2021-10-13 21:36:47,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:36:47,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:47,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:36:47,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:36:47,906 INFO L87 Difference]: Start difference. First operand 1263 states and 4442 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) [2021-10-13 21:36:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:48,160 INFO L93 Difference]: Finished difference Result 992 states and 3314 transitions. [2021-10-13 21:36:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:36:48,162 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 [2021-10-13 21:36:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:48,173 INFO L225 Difference]: With dead ends: 992 [2021-10-13 21:36:48,173 INFO L226 Difference]: Without dead ends: 992 [2021-10-13 21:36:48,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:36:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-10-13 21:36:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 992. [2021-10-13 21:36:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 873 states have (on average 3.7961053837342495) internal successors, (3314), 991 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3314 transitions. [2021-10-13 21:36:48,228 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3314 transitions. Word has length 3 [2021-10-13 21:36:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:48,228 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 3314 transitions. [2021-10-13 21:36:48,228 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) [2021-10-13 21:36:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3314 transitions. [2021-10-13 21:36:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:36:48,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:48,229 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 21:36:48,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-13 21:36:48,441 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 [2021-10-13 21:36:48,442 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:36:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 23233862, now seen corresponding path program 1 times [2021-10-13 21:36:48,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:48,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867159889] [2021-10-13 21:36:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:36:48,446 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:48,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:48,447 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) [2021-10-13 21:36:48,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 21:36:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:36:48,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:36:48,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:48,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:48,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:36:48,814 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:36:48,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2021-10-13 21:36:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:48,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:49,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:49,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867159889] [2021-10-13 21:36:49,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867159889] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:36:49,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:36:49,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:36:49,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236558275] [2021-10-13 21:36:49,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:36:49,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:49,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:36:49,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:36:49,425 INFO L87 Difference]: Start difference. First operand 992 states and 3314 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) [2021-10-13 21:36:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:55,859 INFO L93 Difference]: Finished difference Result 5915 states and 19825 transitions. [2021-10-13 21:36:55,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:36:55,861 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 [2021-10-13 21:36:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:55,931 INFO L225 Difference]: With dead ends: 5915 [2021-10-13 21:36:55,931 INFO L226 Difference]: Without dead ends: 5915 [2021-10-13 21:36:55,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:36:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-10-13 21:36:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 1000. [2021-10-13 21:36:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 881 states have (on average 3.7797956867196367) internal successors, (3330), 999 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 3330 transitions. [2021-10-13 21:36:56,065 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 3330 transitions. Word has length 4 [2021-10-13 21:36:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:56,065 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 3330 transitions. [2021-10-13 21:36:56,065 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) [2021-10-13 21:36:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 3330 transitions. [2021-10-13 21:36:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:36:56,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:56,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:36:56,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 21:36:56,278 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 [2021-10-13 21:36:56,279 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:36:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash 721245092, now seen corresponding path program 1 times [2021-10-13 21:36:56,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:56,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423670622] [2021-10-13 21:36:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:36:56,282 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:56,284 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) [2021-10-13 21:36:56,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 21:36:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:36:56,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:36:56,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:56,730 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-13 21:36:56,730 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 42 treesize of output 88 [2021-10-13 21:36:56,742 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 90 treesize of output 88 [2021-10-13 21:36:58,395 INFO L354 Elim1Store]: treesize reduction 84, result has 36.8 percent of original size [2021-10-13 21:36:58,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 95 [2021-10-13 21:37:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:20,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:20,157 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:20,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423670622] [2021-10-13 21:37:20,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423670622] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:20,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:20,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:37:20,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690582371] [2021-10-13 21:37:20,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:37:20,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:20,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:37:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-13 21:37:20,161 INFO L87 Difference]: Start difference. First operand 1000 states and 3330 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-10-13 21:37:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:28,834 INFO L93 Difference]: Finished difference Result 941 states and 3149 transitions. [2021-10-13 21:37:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:37:28,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2021-10-13 21:37:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:28,844 INFO L225 Difference]: With dead ends: 941 [2021-10-13 21:37:28,844 INFO L226 Difference]: Without dead ends: 941 [2021-10-13 21:37:28,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4241.8ms TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-13 21:37:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-10-13 21:37:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 941. [2021-10-13 21:37:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 840 states have (on average 3.748809523809524) internal successors, (3149), 940 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:37:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3149 transitions. [2021-10-13 21:37:28,881 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3149 transitions. Word has length 5 [2021-10-13 21:37:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:28,882 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 3149 transitions. [2021-10-13 21:37:28,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-10-13 21:37:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3149 transitions. [2021-10-13 21:37:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:37:28,883 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:28,883 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:37:28,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:29,098 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 [2021-10-13 21:37:29,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:37:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:29,101 INFO L82 PathProgramCache]: Analyzing trace with hash 721245094, now seen corresponding path program 1 times [2021-10-13 21:37:29,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:29,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621339713] [2021-10-13 21:37:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:29,103 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:29,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:29,104 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) [2021-10-13 21:37:29,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 21:37:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:29,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:37:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:29,266 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:37:29,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 51 [2021-10-13 21:37:29,401 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 21:37:29,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2021-10-13 21:37:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:29,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:29,623 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:29,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621339713] [2021-10-13 21:37:29,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621339713] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:29,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:29,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:37:29,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369710632] [2021-10-13 21:37:29,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:37:29,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:29,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:37:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:29,625 INFO L87 Difference]: Start difference. First operand 941 states and 3149 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) [2021-10-13 21:37:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:29,792 INFO L93 Difference]: Finished difference Result 882 states and 2968 transitions. [2021-10-13 21:37:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:29,793 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 [2021-10-13 21:37:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:29,798 INFO L225 Difference]: With dead ends: 882 [2021-10-13 21:37:29,799 INFO L226 Difference]: Without dead ends: 882 [2021-10-13 21:37:29,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-10-13 21:37:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2021-10-13 21:37:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 799 states have (on average 3.7146433041301625) internal successors, (2968), 881 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:37:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2968 transitions. [2021-10-13 21:37:29,834 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2968 transitions. Word has length 5 [2021-10-13 21:37:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:29,834 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2968 transitions. [2021-10-13 21:37:29,834 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) [2021-10-13 21:37:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2968 transitions. [2021-10-13 21:37:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:37:29,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:29,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:37:29,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:30,053 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 [2021-10-13 21:37:30,055 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:37:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:30,056 INFO L82 PathProgramCache]: Analyzing trace with hash 883755399, now seen corresponding path program 1 times [2021-10-13 21:37:30,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:30,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025081670] [2021-10-13 21:37:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:30,057 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:30,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:30,058 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) [2021-10-13 21:37:30,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 21:37:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:30,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:37:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:30,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:30,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:30,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025081670] [2021-10-13 21:37:30,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025081670] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:30,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:30,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:37:30,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869841109] [2021-10-13 21:37:30,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:37:30,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:37:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:37:30,290 INFO L87 Difference]: Start difference. First operand 882 states and 2968 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2021-10-13 21:37:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:30,826 INFO L93 Difference]: Finished difference Result 1456 states and 4744 transitions. [2021-10-13 21:37:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 21:37:30,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 [2021-10-13 21:37:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:30,833 INFO L225 Difference]: With dead ends: 1456 [2021-10-13 21:37:30,833 INFO L226 Difference]: Without dead ends: 1456 [2021-10-13 21:37:30,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:37:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-10-13 21:37:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1176. [2021-10-13 21:37:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1093 states have (on average 3.646843549862763) internal successors, (3986), 1175 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:37:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3986 transitions. [2021-10-13 21:37:30,886 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3986 transitions. Word has length 6 [2021-10-13 21:37:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:30,887 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 3986 transitions. [2021-10-13 21:37:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2021-10-13 21:37:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3986 transitions. [2021-10-13 21:37:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:37:30,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:30,888 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:30,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:31,107 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 [2021-10-13 21:37:31,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:37:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1626816374, now seen corresponding path program 1 times [2021-10-13 21:37:31,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:31,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487960917] [2021-10-13 21:37:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:31,110 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:31,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:31,111 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) [2021-10-13 21:37:31,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 21:37:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:37:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:31,319 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:37:31,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-10-13 21:37:31,503 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-10-13 21:37:31,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 77 [2021-10-13 21:37:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:31,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:32,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:32,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487960917] [2021-10-13 21:37:32,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487960917] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:32,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:32,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:37:32,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025455813] [2021-10-13 21:37:32,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:37:32,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:37:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:32,040 INFO L87 Difference]: Start difference. First operand 1176 states and 3986 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-13 21:37:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:32,241 INFO L93 Difference]: Finished difference Result 1107 states and 3784 transitions. [2021-10-13 21:37:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:32,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2021-10-13 21:37:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:32,248 INFO L225 Difference]: With dead ends: 1107 [2021-10-13 21:37:32,248 INFO L226 Difference]: Without dead ends: 1107 [2021-10-13 21:37:32,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:32,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-10-13 21:37:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1107. [2021-10-13 21:37:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1042 states have (on average 3.6314779270633397) internal successors, (3784), 1106 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:37:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 3784 transitions. [2021-10-13 21:37:32,293 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 3784 transitions. Word has length 7 [2021-10-13 21:37:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:32,294 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 3784 transitions. [2021-10-13 21:37:32,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-13 21:37:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 3784 transitions. [2021-10-13 21:37:32,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:37:32,296 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:32,297 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:32,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-13 21:37:32,509 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 [2021-10-13 21:37:32,510 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:37:32,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:32,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1626816375, now seen corresponding path program 1 times [2021-10-13 21:37:32,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:32,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733585084] [2021-10-13 21:37:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:32,513 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:32,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:32,514 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) [2021-10-13 21:37:32,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 21:37:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:32,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 21:37:32,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:32,926 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-13 21:37:32,926 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 40 treesize of output 78 [2021-10-13 21:37:32,932 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 81 treesize of output 79 [2021-10-13 21:37:35,303 INFO L354 Elim1Store]: treesize reduction 100, result has 24.8 percent of original size [2021-10-13 21:37:35,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 72 [2021-10-13 21:37:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:48,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:48,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:48,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733585084] [2021-10-13 21:37:48,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733585084] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:48,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:48,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:37:48,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282819531] [2021-10-13 21:37:48,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:37:48,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:37:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:37:48,658 INFO L87 Difference]: Start difference. First operand 1107 states and 3784 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-10-13 21:37:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:54,289 INFO L93 Difference]: Finished difference Result 1038 states and 3582 transitions. [2021-10-13 21:37:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:37:54,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2021-10-13 21:37:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:54,296 INFO L225 Difference]: With dead ends: 1038 [2021-10-13 21:37:54,296 INFO L226 Difference]: Without dead ends: 1038 [2021-10-13 21:37:54,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6327.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:37:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-10-13 21:37:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1038. [2021-10-13 21:37:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 991 states have (on average 3.6145307769929365) internal successors, (3582), 1037 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:37:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3582 transitions. [2021-10-13 21:37:54,331 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3582 transitions. Word has length 7 [2021-10-13 21:37:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:54,331 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 3582 transitions. [2021-10-13 21:37:54,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-10-13 21:37:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3582 transitions. [2021-10-13 21:37:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:37:54,333 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:54,333 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:54,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:54,546 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 [2021-10-13 21:37:54,546 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:37:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:54,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1108306014, now seen corresponding path program 1 times [2021-10-13 21:37:54,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:54,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935007919] [2021-10-13 21:37:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:54,548 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:54,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:54,550 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) [2021-10-13 21:37:54,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 21:37:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:37:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:54,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:54,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:54,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935007919] [2021-10-13 21:37:54,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935007919] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:54,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:54,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:37:54,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741011424] [2021-10-13 21:37:54,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:37:54,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:37:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:37:54,826 INFO L87 Difference]: Start difference. First operand 1038 states and 3582 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-10-13 21:37:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:55,348 INFO L93 Difference]: Finished difference Result 964 states and 3180 transitions. [2021-10-13 21:37:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 21:37:55,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 [2021-10-13 21:37:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:55,353 INFO L225 Difference]: With dead ends: 964 [2021-10-13 21:37:55,353 INFO L226 Difference]: Without dead ends: 964 [2021-10-13 21:37:55,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:37:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-10-13 21:37:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 924. [2021-10-13 21:37:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 877 states have (on average 3.539338654503991) internal successors, (3104), 923 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:37:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 3104 transitions. [2021-10-13 21:37:55,385 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 3104 transitions. Word has length 8 [2021-10-13 21:37:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 3104 transitions. [2021-10-13 21:37:55,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-10-13 21:37:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 3104 transitions. [2021-10-13 21:37:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:37:55,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:55,387 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:55,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:55,599 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 [2021-10-13 21:37:55,599 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:37:55,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:55,600 INFO L82 PathProgramCache]: Analyzing trace with hash 368748989, now seen corresponding path program 1 times [2021-10-13 21:37:55,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:55,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898821335] [2021-10-13 21:37:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:55,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:55,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:55,603 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) [2021-10-13 21:37:55,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 21:37:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 21:37:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:55,829 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:37:55,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 21:37:55,888 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 21:37:55,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-10-13 21:37:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:37:55,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:38:00,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:00,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898821335] [2021-10-13 21:38:00,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898821335] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:00,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:00,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:38:00,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231427994] [2021-10-13 21:38:00,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:38:00,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:00,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:38:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=17, Unknown=2, NotChecked=0, Total=30 [2021-10-13 21:38:00,065 INFO L87 Difference]: Start difference. First operand 924 states and 3104 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-10-13 21:38:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:00,247 INFO L93 Difference]: Finished difference Result 728 states and 2412 transitions. [2021-10-13 21:38:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:38:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 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 [2021-10-13 21:38:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:00,251 INFO L225 Difference]: With dead ends: 728 [2021-10-13 21:38:00,252 INFO L226 Difference]: Without dead ends: 728 [2021-10-13 21:38:00,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4086.3ms TimeCoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-13 21:38:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-10-13 21:38:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 728. [2021-10-13 21:38:00,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 702 states have (on average 3.4358974358974357) internal successors, (2412), 727 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2412 transitions. [2021-10-13 21:38:00,278 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2412 transitions. Word has length 8 [2021-10-13 21:38:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:00,279 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 2412 transitions. [2021-10-13 21:38:00,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2021-10-13 21:38:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2412 transitions. [2021-10-13 21:38:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:38:00,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:00,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:38:00,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-13 21:38:00,493 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 [2021-10-13 21:38:00,494 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:38:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:00,495 INFO L82 PathProgramCache]: Analyzing trace with hash 368748991, now seen corresponding path program 1 times [2021-10-13 21:38:00,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:00,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845089399] [2021-10-13 21:38:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:00,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:00,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:00,498 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) [2021-10-13 21:38:00,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 21:38:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:38:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:00,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:00,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:00,939 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:38:00,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-13 21:38:01,035 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:38:01,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-13 21:38:01,205 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:38:01,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-10-13 21:38:01,217 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:38:01,218 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 39 treesize of output 39 [2021-10-13 21:38:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:38:02,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:38:03,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:03,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845089399] [2021-10-13 21:38:03,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845089399] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:38:03,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:38:03,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:38:03,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350791367] [2021-10-13 21:38:03,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:38:03,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:03,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:38:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:38:03,213 INFO L87 Difference]: Start difference. First operand 728 states and 2412 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) [2021-10-13 21:38:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:28,295 INFO L93 Difference]: Finished difference Result 7714 states and 25964 transitions. [2021-10-13 21:38:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 21:38:28,296 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 [2021-10-13 21:38:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:28,342 INFO L225 Difference]: With dead ends: 7714 [2021-10-13 21:38:28,343 INFO L226 Difference]: Without dead ends: 7714 [2021-10-13 21:38:28,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 21198.6ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-10-13 21:38:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-10-13 21:38:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 964. [2021-10-13 21:38:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 938 states have (on average 3.5714285714285716) internal successors, (3350), 963 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3350 transitions. [2021-10-13 21:38:28,475 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3350 transitions. Word has length 8 [2021-10-13 21:38:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:28,475 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 3350 transitions. [2021-10-13 21:38:28,476 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) [2021-10-13 21:38:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3350 transitions. [2021-10-13 21:38:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:38:28,481 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:28,482 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 21:38:28,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:28,695 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 [2021-10-13 21:38:28,696 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:38:28,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:28,697 INFO L82 PathProgramCache]: Analyzing trace with hash -568865786, now seen corresponding path program 2 times [2021-10-13 21:38:28,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:28,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194497401] [2021-10-13 21:38:28,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:38:28,698 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:28,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:28,702 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) [2021-10-13 21:38:28,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 21:38:28,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:38:28,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:38:28,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:38:28,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:28,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:29,172 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:38:29,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2021-10-13 21:38:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:29,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:31,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:31,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194497401] [2021-10-13 21:38:31,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194497401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:38:31,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:38:31,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:38:31,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584236109] [2021-10-13 21:38:31,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:38:31,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:38:31,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:38:31,655 INFO L87 Difference]: Start difference. First operand 964 states and 3350 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) [2021-10-13 21:38:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:54,778 INFO L93 Difference]: Finished difference Result 6590 states and 23558 transitions. [2021-10-13 21:38:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:38:54,783 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 [2021-10-13 21:38:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:54,817 INFO L225 Difference]: With dead ends: 6590 [2021-10-13 21:38:54,817 INFO L226 Difference]: Without dead ends: 6590 [2021-10-13 21:38:54,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 8217.4ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:38:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6590 states. [2021-10-13 21:38:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6590 to 978. [2021-10-13 21:38:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 952 states have (on average 3.5483193277310923) internal successors, (3378), 977 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3378 transitions. [2021-10-13 21:38:54,942 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3378 transitions. Word has length 8 [2021-10-13 21:38:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:54,943 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 3378 transitions. [2021-10-13 21:38:54,943 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) [2021-10-13 21:38:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3378 transitions. [2021-10-13 21:38:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:38:54,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:54,944 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:38:54,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-13 21:38:55,159 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 [2021-10-13 21:38:55,159 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:38:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:55,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1453677761, now seen corresponding path program 1 times [2021-10-13 21:38:55,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:55,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044707285] [2021-10-13 21:38:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:55,162 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:55,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:55,163 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) [2021-10-13 21:38:55,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 21:38:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:55,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:38:55,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:38:55,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:38:55,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:55,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044707285] [2021-10-13 21:38:55,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044707285] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:38:55,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:38:55,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 21:38:55,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988457884] [2021-10-13 21:38:55,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:38:55,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:55,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:38:55,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:38:55,789 INFO L87 Difference]: Start difference. First operand 978 states and 3378 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2021-10-13 21:38:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:57,289 INFO L93 Difference]: Finished difference Result 1930 states and 6504 transitions. [2021-10-13 21:38:57,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 21:38:57,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 [2021-10-13 21:38:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:57,298 INFO L225 Difference]: With dead ends: 1930 [2021-10-13 21:38:57,298 INFO L226 Difference]: Without dead ends: 1930 [2021-10-13 21:38:57,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-13 21:38:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-10-13 21:38:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1538. [2021-10-13 21:38:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1512 states have (on average 3.624338624338624) internal successors, (5480), 1537 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5480 transitions. [2021-10-13 21:38:57,365 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5480 transitions. Word has length 9 [2021-10-13 21:38:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:57,365 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 5480 transitions. [2021-10-13 21:38:57,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2021-10-13 21:38:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5480 transitions. [2021-10-13 21:38:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:38:57,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:57,366 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:38:57,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:57,579 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 [2021-10-13 21:38:57,579 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:38:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:57,580 INFO L82 PathProgramCache]: Analyzing trace with hash 76108918, now seen corresponding path program 1 times [2021-10-13 21:38:57,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:57,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909010503] [2021-10-13 21:38:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:57,581 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:57,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:57,582 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) [2021-10-13 21:38:57,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 21:38:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:57,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:38:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:57,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:38:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:38:57,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:38:57,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909010503] [2021-10-13 21:38:57,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909010503] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:38:57,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:38:57,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:38:57,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002059565] [2021-10-13 21:38:57,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:38:57,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:38:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:38:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:38:57,847 INFO L87 Difference]: Start difference. First operand 1538 states and 5480 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-10-13 21:38:57,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:38:57,962 INFO L93 Difference]: Finished difference Result 2420 states and 8571 transitions. [2021-10-13 21:38:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:38:57,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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 [2021-10-13 21:38:57,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:38:57,972 INFO L225 Difference]: With dead ends: 2420 [2021-10-13 21:38:57,972 INFO L226 Difference]: Without dead ends: 2420 [2021-10-13 21:38:57,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:38:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-10-13 21:38:58,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1906. [2021-10-13 21:38:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1880 states have (on average 3.6691489361702128) internal successors, (6898), 1905 states have internal predecessors, (6898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:38:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6898 transitions. [2021-10-13 21:38:58,070 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6898 transitions. Word has length 10 [2021-10-13 21:38:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:38:58,071 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 6898 transitions. [2021-10-13 21:38:58,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-10-13 21:38:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6898 transitions. [2021-10-13 21:38:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:38:58,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:38:58,072 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:38:58,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 21:38:58,285 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 [2021-10-13 21:38:58,286 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:38:58,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:38:58,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2108226984, now seen corresponding path program 1 times [2021-10-13 21:38:58,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:38:58,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244060609] [2021-10-13 21:38:58,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:38:58,288 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:38:58,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:38:58,289 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) [2021-10-13 21:38:58,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 21:38:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:38:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:38:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:38:58,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:58,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:38:58,897 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:38:58,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-13 21:38:58,998 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:38:58,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-13 21:38:59,203 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:38:59,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2021-10-13 21:38:59,220 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:38:59,220 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 40 treesize of output 40 [2021-10-13 21:39:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:03,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:04,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:04,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244060609] [2021-10-13 21:39:04,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244060609] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:04,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:04,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:39:04,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429669871] [2021-10-13 21:39:04,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:39:04,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:39:04,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:39:04,152 INFO L87 Difference]: Start difference. First operand 1906 states and 6898 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) [2021-10-13 21:39:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:17,759 INFO L93 Difference]: Finished difference Result 6061 states and 20769 transitions. [2021-10-13 21:39:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:39:17,760 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 [2021-10-13 21:39:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:17,789 INFO L225 Difference]: With dead ends: 6061 [2021-10-13 21:39:17,790 INFO L226 Difference]: Without dead ends: 6061 [2021-10-13 21:39:17,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 10337.2ms TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-10-13 21:39:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-10-13 21:39:17,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 1990. [2021-10-13 21:39:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1964 states have (on average 3.7331975560081467) internal successors, (7332), 1989 states have internal predecessors, (7332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 7332 transitions. [2021-10-13 21:39:17,928 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 7332 transitions. Word has length 10 [2021-10-13 21:39:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:17,928 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 7332 transitions. [2021-10-13 21:39:17,928 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) [2021-10-13 21:39:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 7332 transitions. [2021-10-13 21:39:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:39:17,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:17,929 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:17,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:18,143 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 [2021-10-13 21:39:18,143 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:39:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2108226933, now seen corresponding path program 1 times [2021-10-13 21:39:18,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:18,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249110437] [2021-10-13 21:39:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:39:18,145 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:18,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:18,147 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) [2021-10-13 21:39:18,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 21:39:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:39:18,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:39:18,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:18,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 21:39:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:39:18,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:39:18,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:18,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249110437] [2021-10-13 21:39:18,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249110437] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:39:18,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:39:18,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 21:39:18,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724019735] [2021-10-13 21:39:18,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:39:18,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:39:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:39:18,401 INFO L87 Difference]: Start difference. First operand 1990 states and 7332 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2021-10-13 21:39:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:18,566 INFO L93 Difference]: Finished difference Result 1608 states and 5868 transitions. [2021-10-13 21:39:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:39:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:39:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:18,572 INFO L225 Difference]: With dead ends: 1608 [2021-10-13 21:39:18,572 INFO L226 Difference]: Without dead ends: 1608 [2021-10-13 21:39:18,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:39:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-10-13 21:39:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1608. [2021-10-13 21:39:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1594 states have (on average 3.6813048933500627) internal successors, (5868), 1607 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5868 transitions. [2021-10-13 21:39:18,657 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5868 transitions. Word has length 10 [2021-10-13 21:39:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:18,657 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 5868 transitions. [2021-10-13 21:39:18,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2021-10-13 21:39:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5868 transitions. [2021-10-13 21:39:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:39:18,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:18,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:18,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-13 21:39:18,871 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 [2021-10-13 21:39:18,872 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:39:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2108226931, now seen corresponding path program 1 times [2021-10-13 21:39:18,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:18,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183751043] [2021-10-13 21:39:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:39:18,874 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:18,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:18,876 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) [2021-10-13 21:39:18,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 21:39:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:39:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:39:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:19,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:19,493 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 [2021-10-13 21:39:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:19,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:19,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183751043] [2021-10-13 21:39:19,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183751043] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:19,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:19,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 21:39:19,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921018953] [2021-10-13 21:39:19,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:39:19,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:19,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:39:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:39:19,607 INFO L87 Difference]: Start difference. First operand 1608 states and 5868 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2021-10-13 21:39:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:21,067 INFO L93 Difference]: Finished difference Result 2234 states and 7627 transitions. [2021-10-13 21:39:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 21:39:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:39:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:21,074 INFO L225 Difference]: With dead ends: 2234 [2021-10-13 21:39:21,075 INFO L226 Difference]: Without dead ends: 2234 [2021-10-13 21:39:21,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:39:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-10-13 21:39:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1594. [2021-10-13 21:39:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1580 states have (on average 3.6930379746835444) internal successors, (5835), 1593 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5835 transitions. [2021-10-13 21:39:21,128 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5835 transitions. Word has length 10 [2021-10-13 21:39:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:21,129 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 5835 transitions. [2021-10-13 21:39:21,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2021-10-13 21:39:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5835 transitions. [2021-10-13 21:39:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 21:39:21,130 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:21,130 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:21,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-13 21:39:21,343 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 [2021-10-13 21:39:21,343 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:39:21,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:21,344 INFO L82 PathProgramCache]: Analyzing trace with hash -484000971, now seen corresponding path program 2 times [2021-10-13 21:39:21,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:21,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70636506] [2021-10-13 21:39:21,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:39:21,345 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:21,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:21,347 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) [2021-10-13 21:39:21,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 21:39:21,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:39:21,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:39:21,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:39:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:21,865 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:39:21,866 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 39 treesize of output 89 [2021-10-13 21:39:21,959 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:39:21,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-13 21:39:22,159 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:39:22,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-10-13 21:39:22,171 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:39:22,172 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 39 treesize of output 39 [2021-10-13 21:39:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:39:24,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:39:25,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:25,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70636506] [2021-10-13 21:39:25,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70636506] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:25,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:25,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 21:39:25,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343949621] [2021-10-13 21:39:25,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:39:25,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:25,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:39:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:39:25,824 INFO L87 Difference]: Start difference. First operand 1594 states and 5835 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2021-10-13 21:39:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:33,151 INFO L93 Difference]: Finished difference Result 3314 states and 11324 transitions. [2021-10-13 21:39:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 21:39:33,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 11 [2021-10-13 21:39:33,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:33,164 INFO L225 Difference]: With dead ends: 3314 [2021-10-13 21:39:33,165 INFO L226 Difference]: Without dead ends: 3314 [2021-10-13 21:39:33,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 7477.4ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:39:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2021-10-13 21:39:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 1464. [2021-10-13 21:39:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1450 states have (on average 3.733103448275862) internal successors, (5413), 1463 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 5413 transitions. [2021-10-13 21:39:33,246 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 5413 transitions. Word has length 11 [2021-10-13 21:39:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:33,247 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 5413 transitions. [2021-10-13 21:39:33,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2021-10-13 21:39:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 5413 transitions. [2021-10-13 21:39:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:39:33,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:33,248 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:33,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-13 21:39:33,456 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 [2021-10-13 21:39:33,457 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:39:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2119122807, now seen corresponding path program 3 times [2021-10-13 21:39:33,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:33,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392201021] [2021-10-13 21:39:33,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:39:33,459 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:33,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:33,460 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) [2021-10-13 21:39:33,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 21:39:33,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:39:33,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:39:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:39:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:33,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:33,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:34,000 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:39:34,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-13 21:39:34,092 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:39:34,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-13 21:39:34,230 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:39:34,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-10-13 21:39:34,244 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:39:34,244 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 30 treesize of output 30 [2021-10-13 21:39:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:39:34,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:39:36,290 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:36,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392201021] [2021-10-13 21:39:36,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392201021] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:36,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:36,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 21:39:36,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84220135] [2021-10-13 21:39:36,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:39:36,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:39:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:39:36,293 INFO L87 Difference]: Start difference. First operand 1464 states and 5413 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-10-13 21:39:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:46,406 INFO L93 Difference]: Finished difference Result 3296 states and 11680 transitions. [2021-10-13 21:39:46,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 21:39:46,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:39:46,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:46,420 INFO L225 Difference]: With dead ends: 3296 [2021-10-13 21:39:46,420 INFO L226 Difference]: Without dead ends: 3296 [2021-10-13 21:39:46,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 9001.9ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:39:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-10-13 21:39:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2008. [2021-10-13 21:39:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 1994 states have (on average 3.982447342026078) internal successors, (7941), 2007 states have internal predecessors, (7941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7941 transitions. [2021-10-13 21:39:46,482 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7941 transitions. Word has length 12 [2021-10-13 21:39:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:46,482 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 7941 transitions. [2021-10-13 21:39:46,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-10-13 21:39:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7941 transitions. [2021-10-13 21:39:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:39:46,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:46,484 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:46,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:46,697 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 [2021-10-13 21:39:46,698 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:39:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash -881163949, now seen corresponding path program 1 times [2021-10-13 21:39:46,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:46,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758578194] [2021-10-13 21:39:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:39:46,700 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:46,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:46,701 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) [2021-10-13 21:39:46,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 21:39:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:39:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:39:46,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:47,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:47,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:47,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758578194] [2021-10-13 21:39:47,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758578194] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:47,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:47,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 21:39:47,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510286181] [2021-10-13 21:39:47,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:39:47,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:39:47,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:39:47,342 INFO L87 Difference]: Start difference. First operand 2008 states and 7941 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2021-10-13 21:39:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:48,606 INFO L93 Difference]: Finished difference Result 2062 states and 7793 transitions. [2021-10-13 21:39:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 21:39:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2021-10-13 21:39:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:48,613 INFO L225 Difference]: With dead ends: 2062 [2021-10-13 21:39:48,613 INFO L226 Difference]: Without dead ends: 2062 [2021-10-13 21:39:48,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 473.0ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-13 21:39:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-10-13 21:39:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1970. [2021-10-13 21:39:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1956 states have (on average 3.888036809815951) internal successors, (7605), 1969 states have internal predecessors, (7605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 7605 transitions. [2021-10-13 21:39:48,676 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 7605 transitions. Word has length 13 [2021-10-13 21:39:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:48,676 INFO L470 AbstractCegarLoop]: Abstraction has 1970 states and 7605 transitions. [2021-10-13 21:39:48,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2021-10-13 21:39:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 7605 transitions. [2021-10-13 21:39:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:39:48,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:48,678 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:39:48,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:48,895 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 [2021-10-13 21:39:48,896 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:39:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:48,896 INFO L82 PathProgramCache]: Analyzing trace with hash 925551923, now seen corresponding path program 2 times [2021-10-13 21:39:48,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:48,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233275368] [2021-10-13 21:39:48,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:39:48,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:48,900 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) [2021-10-13 21:39:48,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 21:39:49,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:39:49,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:39:49,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:39:49,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:49,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:49,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:39:49,402 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:39:49,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-13 21:39:49,502 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:39:49,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-13 21:39:49,670 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:39:49,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 21:39:49,684 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:39:49,685 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 29 treesize of output 29 [2021-10-13 21:39:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 21:39:51,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 21:39:52,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:52,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233275368] [2021-10-13 21:39:52,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233275368] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:39:52,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:39:52,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:39:52,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435278955] [2021-10-13 21:39:52,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:39:52,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:52,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:39:52,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:39:52,715 INFO L87 Difference]: Start difference. First operand 1970 states and 7605 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) [2021-10-13 21:39:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:39:53,756 INFO L93 Difference]: Finished difference Result 2210 states and 8794 transitions. [2021-10-13 21:39:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 21:39:53,757 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 [2021-10-13 21:39:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:39:53,764 INFO L225 Difference]: With dead ends: 2210 [2021-10-13 21:39:53,764 INFO L226 Difference]: Without dead ends: 2210 [2021-10-13 21:39:53,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2693.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:39:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-10-13 21:39:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1856. [2021-10-13 21:39:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1842 states have (on average 4.084147665580891) internal successors, (7523), 1855 states have internal predecessors, (7523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:39:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 7523 transitions. [2021-10-13 21:39:53,832 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 7523 transitions. Word has length 13 [2021-10-13 21:39:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:39:53,832 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 7523 transitions. [2021-10-13 21:39:53,832 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) [2021-10-13 21:39:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 7523 transitions. [2021-10-13 21:39:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 21:39:53,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:39:53,834 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1] [2021-10-13 21:39:53,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 21:39:54,048 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 [2021-10-13 21:39:54,049 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:39:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:39:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash 300001299, now seen corresponding path program 1 times [2021-10-13 21:39:54,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:39:54,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978129688] [2021-10-13 21:39:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:39:54,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:39:54,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:39:54,054 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) [2021-10-13 21:39:54,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 21:39:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:39:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 21:39:54,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:39:54,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-10-13 21:39:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:39:54,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:39:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:39:58,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:39:58,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978129688] [2021-10-13 21:39:58,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978129688] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:39:58,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:39:58,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-13 21:39:58,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445478530] [2021-10-13 21:39:58,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 21:39:58,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:39:58,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 21:39:58,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-10-13 21:39:58,931 INFO L87 Difference]: Start difference. First operand 1856 states and 7523 transitions. Second operand has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:40:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:40:22,208 INFO L93 Difference]: Finished difference Result 19552 states and 82185 transitions. [2021-10-13 21:40:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 21:40:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-10-13 21:40:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:40:22,409 INFO L225 Difference]: With dead ends: 19552 [2021-10-13 21:40:22,410 INFO L226 Difference]: Without dead ends: 19552 [2021-10-13 21:40:22,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 7749.0ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 21:40:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19552 states. [2021-10-13 21:40:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19552 to 1862. [2021-10-13 21:40:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1848 states have (on average 4.0768398268398265) internal successors, (7534), 1861 states have internal predecessors, (7534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:40:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 7534 transitions. [2021-10-13 21:40:22,864 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 7534 transitions. Word has length 14 [2021-10-13 21:40:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:40:22,865 INFO L470 AbstractCegarLoop]: Abstraction has 1862 states and 7534 transitions. [2021-10-13 21:40:22,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:40:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 7534 transitions. [2021-10-13 21:40:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 21:40:22,870 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:40:22,870 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:40:22,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-13 21:40:23,083 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 [2021-10-13 21:40:23,083 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:40:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:40:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1863471490, now seen corresponding path program 1 times [2021-10-13 21:40:23,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:40:23,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780103533] [2021-10-13 21:40:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:40:23,085 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:40:23,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:40:23,086 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) [2021-10-13 21:40:23,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 21:40:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:40:23,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:40:23,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:40:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:40:23,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:40:24,106 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 27 treesize of output 23 [2021-10-13 21:40:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:40:24,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:40:24,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780103533] [2021-10-13 21:40:24,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780103533] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:40:24,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:40:24,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:40:24,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350821472] [2021-10-13 21:40:24,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:40:24,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:40:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:40:24,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:40:24,371 INFO L87 Difference]: Start difference. First operand 1862 states and 7534 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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) [2021-10-13 21:40:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:40:28,408 INFO L93 Difference]: Finished difference Result 6476 states and 25997 transitions. [2021-10-13 21:40:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 21:40:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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 15 [2021-10-13 21:40:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:40:28,478 INFO L225 Difference]: With dead ends: 6476 [2021-10-13 21:40:28,479 INFO L226 Difference]: Without dead ends: 6476 [2021-10-13 21:40:28,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2018.5ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-10-13 21:40:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2021-10-13 21:40:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 1862. [2021-10-13 21:40:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1848 states have (on average 3.9945887445887447) internal successors, (7382), 1861 states have internal predecessors, (7382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:40:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 7382 transitions. [2021-10-13 21:40:28,607 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 7382 transitions. Word has length 15 [2021-10-13 21:40:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:40:28,607 INFO L470 AbstractCegarLoop]: Abstraction has 1862 states and 7382 transitions. [2021-10-13 21:40:28,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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) [2021-10-13 21:40:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 7382 transitions. [2021-10-13 21:40:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:40:28,614 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:40:28,614 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:40:28,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 21:40:28,829 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 [2021-10-13 21:40:28,829 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:40:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:40:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1946958790, now seen corresponding path program 1 times [2021-10-13 21:40:28,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:40:28,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592155767] [2021-10-13 21:40:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:40:28,832 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:40:28,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:40:28,833 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) [2021-10-13 21:40:28,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 21:40:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:40:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:40:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:40:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:40:29,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:40:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:40:29,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:40:29,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592155767] [2021-10-13 21:40:29,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592155767] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:40:29,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:40:29,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 21:40:29,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11119541] [2021-10-13 21:40:29,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:40:29,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:40:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:40:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:40:29,239 INFO L87 Difference]: Start difference. First operand 1862 states and 7382 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2021-10-13 21:40:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:40:29,498 INFO L93 Difference]: Finished difference Result 2322 states and 8868 transitions. [2021-10-13 21:40:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 21:40:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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 16 [2021-10-13 21:40:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:40:29,507 INFO L225 Difference]: With dead ends: 2322 [2021-10-13 21:40:29,507 INFO L226 Difference]: Without dead ends: 2322 [2021-10-13 21:40:29,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:40:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-10-13 21:40:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1818. [2021-10-13 21:40:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1804 states have (on average 3.9456762749445677) internal successors, (7118), 1817 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:40:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 7118 transitions. [2021-10-13 21:40:29,547 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 7118 transitions. Word has length 16 [2021-10-13 21:40:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:40:29,548 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 7118 transitions. [2021-10-13 21:40:29,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2021-10-13 21:40:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 7118 transitions. [2021-10-13 21:40:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:40:29,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:40:29,550 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 21:40:29,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 21:40:29,751 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 [2021-10-13 21:40:29,752 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:40:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:40:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash -859395191, now seen corresponding path program 4 times [2021-10-13 21:40:29,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:40:29,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816932986] [2021-10-13 21:40:29,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:40:29,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:40:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:40:29,756 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) [2021-10-13 21:40:29,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 21:40:30,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:40:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:40:30,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:40:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:40:30,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:40:30,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:40:30,445 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:40:30,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2021-10-13 21:40:30,572 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 [2021-10-13 21:40:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 21:40:30,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:40:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 21:40:31,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:40:31,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816932986] [2021-10-13 21:40:31,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816932986] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:40:31,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:40:31,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 21:40:31,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147855769] [2021-10-13 21:40:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:40:31,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:40:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:40:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:40:31,278 INFO L87 Difference]: Start difference. First operand 1818 states and 7118 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-10-13 21:40:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:40:34,550 INFO L93 Difference]: Finished difference Result 2708 states and 10040 transitions. [2021-10-13 21:40:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 21:40:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 16 [2021-10-13 21:40:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:40:34,559 INFO L225 Difference]: With dead ends: 2708 [2021-10-13 21:40:34,560 INFO L226 Difference]: Without dead ends: 2708 [2021-10-13 21:40:34,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1211.8ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-10-13 21:40:34,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-10-13 21:40:34,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2356. [2021-10-13 21:40:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2342 states have (on average 3.880871050384287) internal successors, (9089), 2355 states have internal predecessors, (9089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:40:34,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 9089 transitions. [2021-10-13 21:40:34,607 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 9089 transitions. Word has length 16 [2021-10-13 21:40:34,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:40:34,607 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 9089 transitions. [2021-10-13 21:40:34,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-10-13 21:40:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 9089 transitions. [2021-10-13 21:40:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:40:34,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:40:34,609 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1] [2021-10-13 21:40:34,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 21:40:34,809 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 [2021-10-13 21:40:34,810 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:40:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:40:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1666617399, now seen corresponding path program 2 times [2021-10-13 21:40:34,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:40:34,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508021375] [2021-10-13 21:40:34,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:40:34,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:40:34,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:40:34,814 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) [2021-10-13 21:40:34,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 21:40:35,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:40:35,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:40:35,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 21:40:35,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:40:35,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-10-13 21:40:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:40:35,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:40:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:40:40,424 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:40:40,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508021375] [2021-10-13 21:40:40,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508021375] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:40:40,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:40:40,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 28 [2021-10-13 21:40:40,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531595046] [2021-10-13 21:40:40,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 21:40:40,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:40:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 21:40:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-10-13 21:40:40,428 INFO L87 Difference]: Start difference. First operand 2356 states and 9089 transitions. Second operand has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:41:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:41:10,683 INFO L93 Difference]: Finished difference Result 22780 states and 89929 transitions. [2021-10-13 21:41:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 21:41:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-10-13 21:41:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:41:10,796 INFO L225 Difference]: With dead ends: 22780 [2021-10-13 21:41:10,797 INFO L226 Difference]: Without dead ends: 22780 [2021-10-13 21:41:10,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 10828.3ms TimeCoverageRelationStatistics Valid=518, Invalid=2344, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 21:41:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22780 states. [2021-10-13 21:41:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22780 to 2371. [2021-10-13 21:41:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2357 states have (on average 3.8689011455239712) internal successors, (9119), 2370 states have internal predecessors, (9119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:41:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 9119 transitions. [2021-10-13 21:41:11,202 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 9119 transitions. Word has length 16 [2021-10-13 21:41:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:41:11,202 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 9119 transitions. [2021-10-13 21:41:11,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:41:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 9119 transitions. [2021-10-13 21:41:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:41:11,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:41:11,204 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-13 21:41:11,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 21:41:11,411 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 [2021-10-13 21:41:11,412 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:41:11,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:41:11,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2125347206, now seen corresponding path program 3 times [2021-10-13 21:41:11,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:41:11,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145607457] [2021-10-13 21:41:11,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:41:11,414 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:41:11,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:41:11,416 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) [2021-10-13 21:41:11,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 21:41:11,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 21:41:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:41:11,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:41:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:41:12,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:41:12,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:41:12,286 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:41:12,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2021-10-13 21:41:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:41:13,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:41:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:41:19,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:41:19,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145607457] [2021-10-13 21:41:19,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145607457] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:41:19,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:41:19,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 21:41:19,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146160432] [2021-10-13 21:41:19,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 21:41:19,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:41:19,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 21:41:19,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 21:41:19,456 INFO L87 Difference]: Start difference. First operand 2371 states and 9119 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) [2021-10-13 21:41:34,527 WARN L207 SmtUtils]: Spent 11.49 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 21:41:44,479 WARN L207 SmtUtils]: Spent 8.70 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 21:41:55,205 WARN L207 SmtUtils]: Spent 9.30 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-13 21:42:01,843 WARN L207 SmtUtils]: Spent 5.48 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-13 21:43:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:43:01,265 INFO L93 Difference]: Finished difference Result 22318 states and 91262 transitions. [2021-10-13 21:43:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 21:43:01,268 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 [2021-10-13 21:43:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:43:01,474 INFO L225 Difference]: With dead ends: 22318 [2021-10-13 21:43:01,475 INFO L226 Difference]: Without dead ends: 22318 [2021-10-13 21:43:01,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 68351.6ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 21:43:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22318 states. [2021-10-13 21:43:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22318 to 2380. [2021-10-13 21:43:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2366 states have (on average 3.8613693998309384) internal successors, (9136), 2379 states have internal predecessors, (9136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 9136 transitions. [2021-10-13 21:43:02,036 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 9136 transitions. Word has length 16 [2021-10-13 21:43:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:43:02,037 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 9136 transitions. [2021-10-13 21:43:02,037 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) [2021-10-13 21:43:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 9136 transitions. [2021-10-13 21:43:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 21:43:02,054 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:43:02,055 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:43:02,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-13 21:43:02,268 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 [2021-10-13 21:43:02,269 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:43:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:43:02,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2068677570, now seen corresponding path program 2 times [2021-10-13 21:43:02,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:43:02,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964599489] [2021-10-13 21:43:02,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:43:02,270 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:43:02,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:43:02,272 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) [2021-10-13 21:43:02,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-13 21:43:02,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:43:02,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:43:02,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:43:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:43:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:43:02,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:43:02,939 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:43:02,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-13 21:43:03,039 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:43:03,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-13 21:43:03,259 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:43:03,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-10-13 21:43:03,273 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:43:03,274 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 37 treesize of output 37 [2021-10-13 21:43:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:43:04,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:43:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:43:05,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:43:05,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964599489] [2021-10-13 21:43:05,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964599489] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:43:05,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:43:05,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:43:05,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324489373] [2021-10-13 21:43:05,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:43:05,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:43:05,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:43:05,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:43:05,858 INFO L87 Difference]: Start difference. First operand 2380 states and 9136 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:43:39,838 INFO L93 Difference]: Finished difference Result 5722 states and 22921 transitions. [2021-10-13 21:43:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 21:43:39,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 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 18 [2021-10-13 21:43:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:43:39,890 INFO L225 Difference]: With dead ends: 5722 [2021-10-13 21:43:39,891 INFO L226 Difference]: Without dead ends: 5456 [2021-10-13 21:43:39,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 28387.8ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 21:43:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2021-10-13 21:43:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 4536. [2021-10-13 21:43:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 4522 states have (on average 4.293896505970809) internal successors, (19417), 4535 states have internal predecessors, (19417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 19417 transitions. [2021-10-13 21:43:40,074 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 19417 transitions. Word has length 18 [2021-10-13 21:43:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:43:40,074 INFO L470 AbstractCegarLoop]: Abstraction has 4536 states and 19417 transitions. [2021-10-13 21:43:40,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 19417 transitions. [2021-10-13 21:43:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 21:43:40,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:43:40,077 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:43:40,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-13 21:43:40,290 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 [2021-10-13 21:43:40,291 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:43:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:43:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2068677623, now seen corresponding path program 2 times [2021-10-13 21:43:40,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:43:40,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114343940] [2021-10-13 21:43:40,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:43:40,293 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:43:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:43:40,295 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) [2021-10-13 21:43:40,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 21:43:40,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:43:40,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:43:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 21:43:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:43:40,960 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:43:40,961 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 39 treesize of output 89 [2021-10-13 21:43:41,057 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:43:41,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-13 21:43:41,203 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:43:41,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 21:43:41,222 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:43:41,223 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 15 treesize of output 15 [2021-10-13 21:43:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 21:43:41,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:43:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 21:43:45,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:43:45,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114343940] [2021-10-13 21:43:45,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114343940] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:43:45,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:43:45,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:43:45,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477436704] [2021-10-13 21:43:45,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:43:45,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:43:45,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:43:45,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:43:45,781 INFO L87 Difference]: Start difference. First operand 4536 states and 19417 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2021-10-13 21:43:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:43:46,907 INFO L93 Difference]: Finished difference Result 4328 states and 17733 transitions. [2021-10-13 21:43:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:43:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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 18 [2021-10-13 21:43:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:43:46,925 INFO L225 Difference]: With dead ends: 4328 [2021-10-13 21:43:46,925 INFO L226 Difference]: Without dead ends: 4328 [2021-10-13 21:43:46,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 887.8ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:43:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2021-10-13 21:43:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4328. [2021-10-13 21:43:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4318 states have (on average 4.106762389995368) internal successors, (17733), 4327 states have internal predecessors, (17733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 17733 transitions. [2021-10-13 21:43:47,036 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 17733 transitions. Word has length 18 [2021-10-13 21:43:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:43:47,036 INFO L470 AbstractCegarLoop]: Abstraction has 4328 states and 17733 transitions. [2021-10-13 21:43:47,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2021-10-13 21:43:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 17733 transitions. [2021-10-13 21:43:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 21:43:47,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:43:47,039 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-13 21:43:47,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 21:43:47,252 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 [2021-10-13 21:43:47,253 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:43:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:43:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash -994353729, now seen corresponding path program 5 times [2021-10-13 21:43:47,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:43:47,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438313359] [2021-10-13 21:43:47,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:43:47,255 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:43:47,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:43:47,257 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) [2021-10-13 21:43:47,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 21:43:47,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 21:43:47,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:43:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 21:43:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:43:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:43:48,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:43:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 21:43:49,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:43:49,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438313359] [2021-10-13 21:43:49,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438313359] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:43:49,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:43:49,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-10-13 21:43:49,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840285322] [2021-10-13 21:43:49,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 21:43:49,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:43:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 21:43:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-10-13 21:43:49,147 INFO L87 Difference]: Start difference. First operand 4328 states and 17733 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:43:54,184 INFO L93 Difference]: Finished difference Result 10899 states and 41816 transitions. [2021-10-13 21:43:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 21:43:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 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 18 [2021-10-13 21:43:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:43:54,232 INFO L225 Difference]: With dead ends: 10899 [2021-10-13 21:43:54,232 INFO L226 Difference]: Without dead ends: 10899 [2021-10-13 21:43:54,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2525.6ms TimeCoverageRelationStatistics Valid=589, Invalid=2063, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 21:43:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10899 states. [2021-10-13 21:43:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10899 to 6224. [2021-10-13 21:43:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6214 states have (on average 4.191342130672675) internal successors, (26045), 6223 states have internal predecessors, (26045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 26045 transitions. [2021-10-13 21:43:54,460 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 26045 transitions. Word has length 18 [2021-10-13 21:43:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:43:54,460 INFO L470 AbstractCegarLoop]: Abstraction has 6224 states and 26045 transitions. [2021-10-13 21:43:54,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 26045 transitions. [2021-10-13 21:43:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:43:54,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:43:54,464 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] [2021-10-13 21:43:54,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 21:43:54,678 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 [2021-10-13 21:43:54,679 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:43:54,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:43:54,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1564098192, now seen corresponding path program 1 times [2021-10-13 21:43:54,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:43:54,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184485950] [2021-10-13 21:43:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:43:54,681 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:43:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:43:54,682 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) [2021-10-13 21:43:54,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-13 21:43:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:43:55,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:43:55,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:43:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:43:55,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:43:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:43:55,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:43:55,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184485950] [2021-10-13 21:43:55,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184485950] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:43:55,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:43:55,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:43:55,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006072340] [2021-10-13 21:43:55,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:43:55,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:43:55,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:43:55,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:43:55,616 INFO L87 Difference]: Start difference. First operand 6224 states and 26045 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:56,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:43:56,244 INFO L93 Difference]: Finished difference Result 10933 states and 45065 transitions. [2021-10-13 21:43:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 21:43:56,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-10-13 21:43:56,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:43:56,376 INFO L225 Difference]: With dead ends: 10933 [2021-10-13 21:43:56,377 INFO L226 Difference]: Without dead ends: 10828 [2021-10-13 21:43:56,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:43:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10828 states. [2021-10-13 21:43:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10828 to 6170. [2021-10-13 21:43:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 6160 states have (on average 4.203733766233766) internal successors, (25895), 6169 states have internal predecessors, (25895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 25895 transitions. [2021-10-13 21:43:56,750 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 25895 transitions. Word has length 21 [2021-10-13 21:43:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:43:56,750 INFO L470 AbstractCegarLoop]: Abstraction has 6170 states and 25895 transitions. [2021-10-13 21:43:56,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:43:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 25895 transitions. [2021-10-13 21:43:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:43:56,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:43:56,755 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:43:56,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-13 21:43:56,965 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 [2021-10-13 21:43:56,966 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:43:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:43:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1351889253, now seen corresponding path program 2 times [2021-10-13 21:43:56,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:43:56,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981045995] [2021-10-13 21:43:56,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:43:56,968 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:43:56,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:43:56,969 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) [2021-10-13 21:43:56,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 21:43:57,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:43:57,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:43:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:43:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:43:57,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 21:43:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 21:43:57,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:43:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 21:43:58,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:43:58,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981045995] [2021-10-13 21:43:58,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981045995] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:43:58,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:43:58,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 21:43:58,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009404361] [2021-10-13 21:43:58,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:43:58,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:43:58,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:43:58,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:43:58,848 INFO L87 Difference]: Start difference. First operand 6170 states and 25895 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-10-13 21:44:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:44:02,025 INFO L93 Difference]: Finished difference Result 11934 states and 51615 transitions. [2021-10-13 21:44:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:44:02,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 21 [2021-10-13 21:44:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:44:02,071 INFO L225 Difference]: With dead ends: 11934 [2021-10-13 21:44:02,071 INFO L226 Difference]: Without dead ends: 11934 [2021-10-13 21:44:02,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1918.7ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-10-13 21:44:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11934 states. [2021-10-13 21:44:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11934 to 8860. [2021-10-13 21:44:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 8850 states have (on average 4.588022598870056) internal successors, (40604), 8859 states have internal predecessors, (40604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:44:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 40604 transitions. [2021-10-13 21:44:02,383 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 40604 transitions. Word has length 21 [2021-10-13 21:44:02,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:44:02,384 INFO L470 AbstractCegarLoop]: Abstraction has 8860 states and 40604 transitions. [2021-10-13 21:44:02,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-10-13 21:44:02,384 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 40604 transitions. [2021-10-13 21:44:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:44:02,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:44:02,387 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:44:02,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 21:44:02,587 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 [2021-10-13 21:44:02,588 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:44:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:44:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1974759167, now seen corresponding path program 3 times [2021-10-13 21:44:02,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:44:02,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354253790] [2021-10-13 21:44:02,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:44:02,591 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:44:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:44:02,592 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) [2021-10-13 21:44:02,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 21:44:03,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:44:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:44:03,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:44:03,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:44:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:44:03,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:44:03,576 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 35 treesize of output 31 [2021-10-13 21:44:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:44:04,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:44:04,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354253790] [2021-10-13 21:44:04,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354253790] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:44:04,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:44:04,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:44:04,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090987464] [2021-10-13 21:44:04,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:44:04,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:44:04,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:44:04,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:44:04,278 INFO L87 Difference]: Start difference. First operand 8860 states and 40604 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:44:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:44:07,003 INFO L93 Difference]: Finished difference Result 19680 states and 89441 transitions. [2021-10-13 21:44:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:44:07,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-10-13 21:44:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:44:07,280 INFO L225 Difference]: With dead ends: 19680 [2021-10-13 21:44:07,280 INFO L226 Difference]: Without dead ends: 19680 [2021-10-13 21:44:07,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1437.0ms TimeCoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2021-10-13 21:44:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19680 states. [2021-10-13 21:44:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19680 to 11984. [2021-10-13 21:44:07,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11984 states, 11974 states have (on average 4.8357274093870055) internal successors, (57903), 11983 states have internal predecessors, (57903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:44:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11984 states to 11984 states and 57903 transitions. [2021-10-13 21:44:07,951 INFO L78 Accepts]: Start accepts. Automaton has 11984 states and 57903 transitions. Word has length 21 [2021-10-13 21:44:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:44:07,952 INFO L470 AbstractCegarLoop]: Abstraction has 11984 states and 57903 transitions. [2021-10-13 21:44:07,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:44:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 11984 states and 57903 transitions. [2021-10-13 21:44:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:44:07,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:44:07,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:44:07,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-13 21:44:08,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:44:08,170 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:44:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:44:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash 146571293, now seen corresponding path program 4 times [2021-10-13 21:44:08,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:44:08,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228493065] [2021-10-13 21:44:08,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:44:08,173 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:44:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:44:08,174 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:44:08,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-13 21:44:08,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:44:08,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:44:08,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:44:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:44:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:44:08,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:44:08,933 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 35 treesize of output 31 [2021-10-13 21:44:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:44:09,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:44:09,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228493065] [2021-10-13 21:44:09,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228493065] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:44:09,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:44:09,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:44:09,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524291619] [2021-10-13 21:44:09,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:44:09,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:44:09,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:44:09,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:44:09,745 INFO L87 Difference]: Start difference. First operand 11984 states and 57903 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:44:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:44:12,273 INFO L93 Difference]: Finished difference Result 25774 states and 119085 transitions. [2021-10-13 21:44:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 21:44:12,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-10-13 21:44:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:44:12,593 INFO L225 Difference]: With dead ends: 25774 [2021-10-13 21:44:12,594 INFO L226 Difference]: Without dead ends: 25774 [2021-10-13 21:44:12,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1368.1ms TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2021-10-13 21:44:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25774 states. [2021-10-13 21:44:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25774 to 11720. [2021-10-13 21:44:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11720 states, 11710 states have (on average 4.833561058923997) internal successors, (56601), 11719 states have internal predecessors, (56601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:44:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11720 states to 11720 states and 56601 transitions. [2021-10-13 21:44:13,214 INFO L78 Accepts]: Start accepts. Automaton has 11720 states and 56601 transitions. Word has length 21 [2021-10-13 21:44:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:44:13,214 INFO L470 AbstractCegarLoop]: Abstraction has 11720 states and 56601 transitions. [2021-10-13 21:44:13,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:44:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 11720 states and 56601 transitions. [2021-10-13 21:44:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:44:13,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:44:13,221 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-13 21:44:13,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-13 21:44:13,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:44:13,436 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:44:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:44:13,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1018876351, now seen corresponding path program 6 times [2021-10-13 21:44:13,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:44:13,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360935797] [2021-10-13 21:44:13,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:44:13,439 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:44:13,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:44:13,441 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:44:13,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 21:44:14,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 21:44:14,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:44:14,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:44:14,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:44:14,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:44:14,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:44:14,563 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:44:14,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-13 21:44:14,659 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:44:14,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 103 [2021-10-13 21:44:14,845 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:44:14,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-10-13 21:44:14,859 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:44:14,859 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 32 treesize of output 32 [2021-10-13 21:44:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 21:44:17,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:44:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 21:44:23,447 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:44:23,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360935797] [2021-10-13 21:44:23,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360935797] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:44:23,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:44:23,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-13 21:44:23,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137808085] [2021-10-13 21:44:23,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 21:44:23,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:44:23,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 21:44:23,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-10-13 21:44:23,450 INFO L87 Difference]: Start difference. First operand 11720 states and 56601 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:44:37,794 WARN L207 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2021-10-13 21:44:55,148 WARN L207 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-10-13 21:45:08,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:45:08,816 INFO L93 Difference]: Finished difference Result 31150 states and 138728 transitions. [2021-10-13 21:45:08,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:45:08,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 21:45:08,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:45:09,140 INFO L225 Difference]: With dead ends: 31150 [2021-10-13 21:45:09,140 INFO L226 Difference]: Without dead ends: 31150 [2021-10-13 21:45:09,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 43851.2ms TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 21:45:09,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31150 states. [2021-10-13 21:45:09,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31150 to 15880. [2021-10-13 21:45:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15880 states, 15870 states have (on average 4.995652173913044) internal successors, (79281), 15879 states have internal predecessors, (79281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:45:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15880 states to 15880 states and 79281 transitions. [2021-10-13 21:45:10,113 INFO L78 Accepts]: Start accepts. Automaton has 15880 states and 79281 transitions. Word has length 22 [2021-10-13 21:45:10,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:45:10,113 INFO L470 AbstractCegarLoop]: Abstraction has 15880 states and 79281 transitions. [2021-10-13 21:45:10,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:45:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 15880 states and 79281 transitions. [2021-10-13 21:45:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:45:10,119 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:45:10,119 INFO L512 BasicCegarLoop]: trace histogram [17, 4, 1, 1, 1] [2021-10-13 21:45:10,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-13 21:45:10,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:45:10,334 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:45:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:45:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash -873547789, now seen corresponding path program 3 times [2021-10-13 21:45:10,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:45:10,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078606105] [2021-10-13 21:45:10,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:45:10,337 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:45:10,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:45:10,338 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:45:10,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-13 21:45:11,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 21:45:11,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:45:11,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 21:45:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:45:11,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:45:11,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:45:11,783 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:45:11,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2021-10-13 21:45:12,175 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:45:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-10-13 21:45:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 66 proven. 19 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-10-13 21:45:13,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:45:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-10-13 21:45:36,364 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:45:36,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078606105] [2021-10-13 21:45:36,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078606105] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:45:36,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:45:36,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-13 21:45:36,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601150083] [2021-10-13 21:45:36,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 21:45:36,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:45:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 21:45:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=478, Unknown=4, NotChecked=0, Total=552 [2021-10-13 21:45:36,367 INFO L87 Difference]: Start difference. First operand 15880 states and 79281 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) [2021-10-13 21:45:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:45:54,842 INFO L93 Difference]: Finished difference Result 25146 states and 120682 transitions. [2021-10-13 21:45:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 21:45:54,845 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 24 [2021-10-13 21:45:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:45:55,155 INFO L225 Difference]: With dead ends: 25146 [2021-10-13 21:45:55,156 INFO L226 Difference]: Without dead ends: 25146 [2021-10-13 21:45:55,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 26651.1ms TimeCoverageRelationStatistics Valid=284, Invalid=1518, Unknown=4, NotChecked=0, Total=1806 [2021-10-13 21:45:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25146 states. [2021-10-13 21:45:55,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25146 to 15867. [2021-10-13 21:45:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15867 states, 15857 states have (on average 4.997855836539068) internal successors, (79251), 15866 states have internal predecessors, (79251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:45:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15867 states to 15867 states and 79251 transitions. [2021-10-13 21:45:56,033 INFO L78 Accepts]: Start accepts. Automaton has 15867 states and 79251 transitions. Word has length 24 [2021-10-13 21:45:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:45:56,033 INFO L470 AbstractCegarLoop]: Abstraction has 15867 states and 79251 transitions. [2021-10-13 21:45:56,034 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) [2021-10-13 21:45:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 15867 states and 79251 transitions. [2021-10-13 21:45:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 21:45:56,049 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:45:56,052 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:45:56,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-10-13 21:45:56,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:45:56,253 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:45:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:45:56,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1656372149, now seen corresponding path program 1 times [2021-10-13 21:45:56,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:45:56,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211259123] [2021-10-13 21:45:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:45:56,256 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:45:56,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:45:56,257 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:45:56,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-13 21:45:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:45:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:45:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:45:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:45:56,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:45:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:45:57,240 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:45:57,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211259123] [2021-10-13 21:45:57,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211259123] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:45:57,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:45:57,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-13 21:45:57,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553196288] [2021-10-13 21:45:57,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:45:57,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:45:57,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:45:57,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:45:57,242 INFO L87 Difference]: Start difference. First operand 15867 states and 79251 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:45:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:45:59,217 INFO L93 Difference]: Finished difference Result 20303 states and 96212 transitions. [2021-10-13 21:45:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:45:59,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 25 [2021-10-13 21:45:59,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:45:59,479 INFO L225 Difference]: With dead ends: 20303 [2021-10-13 21:45:59,479 INFO L226 Difference]: Without dead ends: 20303 [2021-10-13 21:45:59,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 695.8ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:45:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20303 states. [2021-10-13 21:46:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20303 to 16471. [2021-10-13 21:46:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16471 states, 16461 states have (on average 4.969442925703177) internal successors, (81802), 16470 states have internal predecessors, (81802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:46:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16471 states to 16471 states and 81802 transitions. [2021-10-13 21:46:00,330 INFO L78 Accepts]: Start accepts. Automaton has 16471 states and 81802 transitions. Word has length 25 [2021-10-13 21:46:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:46:00,330 INFO L470 AbstractCegarLoop]: Abstraction has 16471 states and 81802 transitions. [2021-10-13 21:46:00,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:46:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 16471 states and 81802 transitions. [2021-10-13 21:46:00,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 21:46:00,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:46:00,336 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:46:00,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-13 21:46:00,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:46:00,538 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:46:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:46:00,538 INFO L82 PathProgramCache]: Analyzing trace with hash -41158947, now seen corresponding path program 2 times [2021-10-13 21:46:00,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:46:00,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103821916] [2021-10-13 21:46:00,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:46:00,542 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:46:00,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:46:00,548 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:46:00,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 21:46:01,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:46:01,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:46:01,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 21:46:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:46:01,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 21:46:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 21:46:02,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:46:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 21:46:04,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:46:04,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103821916] [2021-10-13 21:46:04,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103821916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:46:04,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:46:04,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 21:46:04,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007632661] [2021-10-13 21:46:04,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:46:04,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:46:04,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:46:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:46:04,383 INFO L87 Difference]: Start difference. First operand 16471 states and 81802 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:46:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:46:09,256 INFO L93 Difference]: Finished difference Result 34463 states and 168553 transitions. [2021-10-13 21:46:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 21:46:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 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 25 [2021-10-13 21:46:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:46:09,726 INFO L225 Difference]: With dead ends: 34463 [2021-10-13 21:46:09,726 INFO L226 Difference]: Without dead ends: 34463 [2021-10-13 21:46:09,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 3296.6ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-10-13 21:46:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34463 states. [2021-10-13 21:46:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34463 to 23507. [2021-10-13 21:46:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23507 states, 23497 states have (on average 5.050644763161254) internal successors, (118675), 23506 states have internal predecessors, (118675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:46:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23507 states to 23507 states and 118675 transitions. [2021-10-13 21:46:11,230 INFO L78 Accepts]: Start accepts. Automaton has 23507 states and 118675 transitions. Word has length 25 [2021-10-13 21:46:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:46:11,230 INFO L470 AbstractCegarLoop]: Abstraction has 23507 states and 118675 transitions. [2021-10-13 21:46:11,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:46:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 23507 states and 118675 transitions. [2021-10-13 21:46:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 21:46:11,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:46:11,239 INFO L512 BasicCegarLoop]: trace histogram [17, 5, 1, 1, 1] [2021-10-13 21:46:11,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-13 21:46:11,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:46:11,452 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:46:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:46:11,455 INFO L82 PathProgramCache]: Analyzing trace with hash -967484690, now seen corresponding path program 4 times [2021-10-13 21:46:11,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:46:11,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012700179] [2021-10-13 21:46:11,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:46:11,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:46:11,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:46:11,458 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:46:11,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-13 21:46:12,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:46:12,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:46:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 21:46:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:46:12,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-10-13 21:46:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 32 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:46:14,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:46:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:46:31,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:46:31,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012700179] [2021-10-13 21:46:31,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012700179] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:46:31,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:46:31,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 47 [2021-10-13 21:46:31,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142280551] [2021-10-13 21:46:31,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-13 21:46:31,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:46:31,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-13 21:46:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1886, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 21:46:31,633 INFO L87 Difference]: Start difference. First operand 23507 states and 118675 transitions. Second operand has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:48:14,050 INFO L93 Difference]: Finished difference Result 319847 states and 1618468 transitions. [2021-10-13 21:48:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-13 21:48:14,053 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 21:48:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:48:19,520 INFO L225 Difference]: With dead ends: 319847 [2021-10-13 21:48:19,520 INFO L226 Difference]: Without dead ends: 319847 [2021-10-13 21:48:19,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 40261.9ms TimeCoverageRelationStatistics Valid=1512, Invalid=6498, Unknown=0, NotChecked=0, Total=8010 [2021-10-13 21:48:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319847 states. [2021-10-13 21:48:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319847 to 23519. [2021-10-13 21:48:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23519 states, 23509 states have (on average 5.04887489897486) internal successors, (118694), 23518 states have internal predecessors, (118694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23519 states to 23519 states and 118694 transitions. [2021-10-13 21:48:28,147 INFO L78 Accepts]: Start accepts. Automaton has 23519 states and 118694 transitions. Word has length 25 [2021-10-13 21:48:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:48:28,148 INFO L470 AbstractCegarLoop]: Abstraction has 23519 states and 118694 transitions. [2021-10-13 21:48:28,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 23519 states and 118694 transitions. [2021-10-13 21:48:28,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 21:48:28,155 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:48:28,155 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, 1, 1, 1, 1] [2021-10-13 21:48:28,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-13 21:48:28,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:48:28,356 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:48:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:48:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash 9841723, now seen corresponding path program 1 times [2021-10-13 21:48:28,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:48:28,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102866946] [2021-10-13 21:48:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:48:28,358 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:48:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:48:28,360 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:48:28,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-13 21:48:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:48:28,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:48:28,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:48:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:48:29,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:48:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:48:29,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:48:29,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102866946] [2021-10-13 21:48:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102866946] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:48:29,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:48:29,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:48:29,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742720079] [2021-10-13 21:48:29,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:48:29,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:48:29,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:48:29,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:48:29,725 INFO L87 Difference]: Start difference. First operand 23519 states and 118694 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:48:32,778 INFO L93 Difference]: Finished difference Result 29511 states and 144686 transitions. [2021-10-13 21:48:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 21:48:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 27 [2021-10-13 21:48:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:48:32,990 INFO L225 Difference]: With dead ends: 29511 [2021-10-13 21:48:32,990 INFO L226 Difference]: Without dead ends: 29335 [2021-10-13 21:48:32,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 946.6ms TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:48:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29335 states. [2021-10-13 21:48:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29335 to 29313. [2021-10-13 21:48:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29313 states, 29303 states have (on average 4.870627580793776) internal successors, (142724), 29312 states have internal predecessors, (142724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29313 states to 29313 states and 142724 transitions. [2021-10-13 21:48:34,334 INFO L78 Accepts]: Start accepts. Automaton has 29313 states and 142724 transitions. Word has length 27 [2021-10-13 21:48:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:48:34,334 INFO L470 AbstractCegarLoop]: Abstraction has 29313 states and 142724 transitions. [2021-10-13 21:48:34,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 29313 states and 142724 transitions. [2021-10-13 21:48:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 21:48:34,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:48:34,345 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, 1, 1, 1, 1] [2021-10-13 21:48:34,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-10-13 21:48:34,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:48:34,561 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:48:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:48:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1802132185, now seen corresponding path program 2 times [2021-10-13 21:48:34,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:48:34,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527597260] [2021-10-13 21:48:34,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:48:34,563 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:48:34,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:48:34,567 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:48:34,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 21:48:35,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:48:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:48:35,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:48:35,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:48:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:48:35,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:48:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:48:36,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:48:36,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527597260] [2021-10-13 21:48:36,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527597260] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:48:36,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:48:36,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-13 21:48:36,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188070231] [2021-10-13 21:48:36,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:48:36,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:48:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:48:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:48:36,596 INFO L87 Difference]: Start difference. First operand 29313 states and 142724 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:48:40,907 INFO L93 Difference]: Finished difference Result 37423 states and 179073 transitions. [2021-10-13 21:48:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 21:48:40,908 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 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 27 [2021-10-13 21:48:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:48:41,458 INFO L225 Difference]: With dead ends: 37423 [2021-10-13 21:48:41,458 INFO L226 Difference]: Without dead ends: 37099 [2021-10-13 21:48:41,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1941.1ms TimeCoverageRelationStatistics Valid=447, Invalid=1035, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 21:48:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37099 states. [2021-10-13 21:48:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37099 to 29609. [2021-10-13 21:48:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29609 states, 29597 states have (on average 4.857249045511369) internal successors, (143760), 29608 states have internal predecessors, (143760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29609 states to 29609 states and 143760 transitions. [2021-10-13 21:48:43,007 INFO L78 Accepts]: Start accepts. Automaton has 29609 states and 143760 transitions. Word has length 27 [2021-10-13 21:48:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:48:43,008 INFO L470 AbstractCegarLoop]: Abstraction has 29609 states and 143760 transitions. [2021-10-13 21:48:43,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 29609 states and 143760 transitions. [2021-10-13 21:48:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 21:48:43,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:48:43,017 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, 1, 1, 1, 1] [2021-10-13 21:48:43,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-13 21:48:43,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:48:43,219 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:48:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:48:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash 44722321, now seen corresponding path program 3 times [2021-10-13 21:48:43,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:48:43,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038368433] [2021-10-13 21:48:43,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:48:43,221 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:48:43,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:48:43,222 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:48:43,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-13 21:48:43,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:48:43,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:48:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:48:43,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:48:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:48:44,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:48:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:48:44,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:48:44,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038368433] [2021-10-13 21:48:44,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038368433] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:48:44,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:48:44,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-13 21:48:44,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596143233] [2021-10-13 21:48:44,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:48:44,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:48:44,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:48:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:48:44,957 INFO L87 Difference]: Start difference. First operand 29609 states and 143760 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:48:48,280 INFO L93 Difference]: Finished difference Result 37187 states and 180856 transitions. [2021-10-13 21:48:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 21:48:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 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 27 [2021-10-13 21:48:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:48:48,467 INFO L225 Difference]: With dead ends: 37187 [2021-10-13 21:48:48,467 INFO L226 Difference]: Without dead ends: 36980 [2021-10-13 21:48:48,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1554.8ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 21:48:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36980 states. [2021-10-13 21:48:49,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36980 to 27556. [2021-10-13 21:48:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27556 states, 27545 states have (on average 4.85478308222908) internal successors, (133725), 27555 states have internal predecessors, (133725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27556 states to 27556 states and 133725 transitions. [2021-10-13 21:48:50,183 INFO L78 Accepts]: Start accepts. Automaton has 27556 states and 133725 transitions. Word has length 27 [2021-10-13 21:48:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:48:50,183 INFO L470 AbstractCegarLoop]: Abstraction has 27556 states and 133725 transitions. [2021-10-13 21:48:50,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:48:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand 27556 states and 133725 transitions. [2021-10-13 21:48:50,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 21:48:50,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:48:50,191 INFO L512 BasicCegarLoop]: trace histogram [18, 6, 1, 1, 1] [2021-10-13 21:48:50,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-13 21:48:50,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:48:50,392 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 33 more)] === [2021-10-13 21:48:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:48:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash -6299164, now seen corresponding path program 5 times [2021-10-13 21:48:50,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:48:50,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277914719] [2021-10-13 21:48:50,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:48:50,396 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:48:50,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:48:50,397 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:48:50,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-13 21:48:51,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-13 21:48:51,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:48:51,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 21:48:51,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:48:52,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 21:48:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 48 proven. 141 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:48:54,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:49:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:49:14,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:49:14,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277914719] [2021-10-13 21:49:14,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277914719] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:49:14,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:49:14,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 50 [2021-10-13 21:49:14,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069155717] [2021-10-13 21:49:14,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-13 21:49:14,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:49:14,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-13 21:49:14,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2166, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 21:49:14,055 INFO L87 Difference]: Start difference. First operand 27556 states and 133725 transitions. Second operand has 51 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-10-13 21:49:19,645 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 [2021-10-13 21:49:19,664 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:49:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:49:19,744 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 21:49:19,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-10-13 21:49:19,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:49:19,945 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. [2021-10-13 21:49:19,948 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:49:19,948 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:49:19,948 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:49:19,949 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:49:19,949 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:49:19,949 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:49:19,949 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 21:49:19,949 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 21:49:19,949 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 21:49:19,949 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 21:49:19,950 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 21:49:19,950 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 21:49:19,950 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 21:49:19,950 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 21:49:19,950 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 21:49:19,950 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 21:49:19,950 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 21:49:19,951 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 21:49:19,951 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 21:49:19,951 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 21:49:19,951 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 21:49:19,951 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 21:49:19,951 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 21:49:19,951 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:49:19,951 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:49:19,951 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 21:49:19,952 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 21:49:19,952 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-13 21:49:19,952 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:49:19,952 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:49:19,952 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:49:19,952 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:49:19,952 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:49:19,952 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:49:19,953 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 21:49:19,953 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 21:49:19,959 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 21:49:19,959 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 21:49:19,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:49:19 BasicIcfg [2021-10-13 21:49:19,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 21:49:19,962 INFO L168 Benchmark]: Toolchain (without parser) took 810681.18 ms. Allocated memory was 153.1 MB in the beginning and 7.2 GB in the end (delta: 7.0 GB). Free memory was 127.9 MB in the beginning and 4.6 GB in the end (delta: -4.5 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-10-13 21:49:19,963 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 21:49:19,963 INFO L168 Benchmark]: CACSL2BoogieTranslator took 388.32 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 114.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:19,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.89 ms. Allocated memory is still 153.1 MB. Free memory was 114.7 MB in the beginning and 112.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:19,964 INFO L168 Benchmark]: Boogie Preprocessor took 42.22 ms. Allocated memory is still 153.1 MB. Free memory was 112.9 MB in the beginning and 111.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:19,964 INFO L168 Benchmark]: RCFGBuilder took 954.47 ms. Allocated memory is still 153.1 MB. Free memory was 111.2 MB in the beginning and 124.1 MB in the end (delta: -12.9 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-10-13 21:49:19,964 INFO L168 Benchmark]: TraceAbstraction took 809220.66 ms. Allocated memory was 153.1 MB in the beginning and 7.2 GB in the end (delta: 7.0 GB). Free memory was 123.6 MB in the beginning and 4.6 GB in the end (delta: -4.5 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-10-13 21:49:19,968 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 388.32 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 114.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 59.89 ms. Allocated memory is still 153.1 MB. Free memory was 114.7 MB in the beginning and 112.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.22 ms. Allocated memory is still 153.1 MB. Free memory was 112.9 MB in the beginning and 111.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 954.47 ms. Allocated memory is still 153.1 MB. Free memory was 111.2 MB in the beginning and 124.1 MB in the end (delta: -12.9 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 809220.66 ms. Allocated memory was 153.1 MB in the beginning and 7.2 GB in the end (delta: 7.0 GB). Free memory was 123.6 MB in the beginning and 4.6 GB in the end (delta: -4.5 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 29343.6ms, 192 PlacesBefore, 63 PlacesAfterwards, 198 TransitionsBefore, 59 TransitionsAfterwards, 3148 CoEnabledTransitionPairs, 7 FixpointIterations, 115 TrivialSequentialCompositions, 63 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 6 ConcurrentYvCompositions, 10 ChoiceCompositions, 208 TotalNumberOfCompositions, 5730 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4490, positive: 4396, positive conditional: 0, positive unconditional: 4396, negative: 94, negative conditional: 0, negative unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1963, positive: 1932, positive conditional: 0, positive unconditional: 1932, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1963, positive: 1932, positive conditional: 0, positive unconditional: 1932, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 31, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2835, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2835, negative conditional: 0, negative unconditional: 2835, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4490, positive: 2464, positive conditional: 0, positive unconditional: 2464, negative: 63, negative conditional: 0, negative unconditional: 63, unknown: 1963, unknown conditional: 0, unknown unconditional: 1963] , Statistics on independence cache: Total cache size (in pairs): 227, Positive cache size: 218, Positive conditional cache size: 0, Positive unconditional cache size: 218, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - 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: 105]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (27556states) and FLOYD_HOARE automaton (currently 18 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 60 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 229 locations, 37 error locations. Started 1 CEGAR loops. OverallTime: 809026.5ms, OverallIterations: 45, TraceHistogramMax: 18, EmptinessCheckTime: 175.8ms, AutomataDifference: 528400.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29502.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2738 SDtfs, 30395 SDslu, 20190 SDs, 0 SdLazy, 30100 SolverSat, 2118 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 249174.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1670 GetRequests, 707 SyntacticMatches, 7 SemanticMatches, 955 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5029 ImplicationChecksByTransitivity, 349273.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29609occurred in iteration=43, InterpolantAutomatonStates: 667, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23278.2ms AutomataMinimizationTime, 44 MinimizatonAttempts, 479508 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 462.3ms SsaConstructionTime, 6287.4ms SatisfiabilityAnalysisTime, 202187.7ms InterpolantComputationTime, 634 NumberOfCodeBlocks, 605 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1178 ConstructedInterpolants, 260 QuantifiedInterpolants, 21297 SizeOfPredicates, 319 NumberOfNonLiveVariables, 4923 ConjunctsInSsa, 625 ConjunctsInUnsatCore, 90 InterpolantComputations, 34 PerfectInterpolantSequences, 675/2022 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