/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-mult-equiv.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 17:59:06,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 17:59:06,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 17:59:06,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-08 17:59:06,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 17:59:06,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 17:59:06,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 17:59:06,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 17:59:06,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 17:59:06,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 17:59:06,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 17:59:06,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 17:59:06,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 17:59:06,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 17:59:06,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 17:59:06,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 17:59:06,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-08 17:59:06,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 17:59:06,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 17:59:06,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 17:59:06,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 17:59:06,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 17:59:06,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 17:59:06,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 17:59:06,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 17:59:06,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 17:59:06,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 17:59:06,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 17:59:06,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-08 17:59:06,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 17:59:06,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 17:59:06,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 17:59:06,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 17:59:06,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 17:59:06,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 17:59:06,948 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 17:59:06,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 17:59:06,948 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 17:59:06,949 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 17:59:06,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 17:59:06,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 17:59:06,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 17:59:06,950 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-08 17:59:06,950 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-08 17:59:06,950 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-08 17:59:06,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 17:59:06,950 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-08 17:59:06,951 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-08 17:59:06,951 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-08 17:59:06,951 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 17:59:06,951 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 17:59:06,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 17:59:06,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 17:59:06,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 17:59:06,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:59:06,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 17:59:06,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 17:59:06,953 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-08 17:59:06,953 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-08 17:59:06,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 17:59:06,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-08 17:59:06,954 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 17:59:07,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 17:59:07,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 17:59:07,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 17:59:07,343 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 17:59:07,344 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 17:59:07,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-10-08 17:59:07,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a302f252/a9e81182f6254b0ebe456a9baef9df95/FLAG82b70f4e7 [2021-10-08 17:59:08,138 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 17:59:08,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-10-08 17:59:08,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a302f252/a9e81182f6254b0ebe456a9baef9df95/FLAG82b70f4e7 [2021-10-08 17:59:08,517 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a302f252/a9e81182f6254b0ebe456a9baef9df95 [2021-10-08 17:59:08,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 17:59:08,535 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-08 17:59:08,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 17:59:08,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 17:59:08,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 17:59:08,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:08,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32525f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08, skipping insertion in model container [2021-10-08 17:59:08,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:08,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 17:59:08,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 17:59:08,863 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-mult-equiv.wvr.c[2274,2287] [2021-10-08 17:59:08,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:59:08,892 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 17:59:08,932 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-mult-equiv.wvr.c[2274,2287] [2021-10-08 17:59:08,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 17:59:08,955 INFO L208 MainTranslator]: Completed translation [2021-10-08 17:59:08,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08 WrapperNode [2021-10-08 17:59:08,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 17:59:08,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 17:59:08,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 17:59:08,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 17:59:08,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:08,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:09,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 17:59:09,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 17:59:09,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 17:59:09,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 17:59:09,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:09,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:09,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:09,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:09,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:09,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:09,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:09,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 17:59:09,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 17:59:09,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 17:59:09,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 17:59:09,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (1/1) ... [2021-10-08 17:59:09,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 17:59:09,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:59:09,081 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 17:59:09,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 17:59:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 17:59:09,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 17:59:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 17:59:09,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 17:59:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 17:59:09,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 17:59:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-08 17:59:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 17:59:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 17:59:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 17:59:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-08 17:59:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 17:59:09,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 17:59:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 17:59:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-08 17:59:09,152 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 17:59:09,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 17:59:09,898 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-08 17:59:09,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:59:09 BoogieIcfgContainer [2021-10-08 17:59:09,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 17:59:09,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 17:59:09,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 17:59:09,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 17:59:09,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 05:59:08" (1/3) ... [2021-10-08 17:59:09,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10abe796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:59:09, skipping insertion in model container [2021-10-08 17:59:09,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 05:59:08" (2/3) ... [2021-10-08 17:59:09,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10abe796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 05:59:09, skipping insertion in model container [2021-10-08 17:59:09,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 05:59:09" (3/3) ... [2021-10-08 17:59:09,917 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2021-10-08 17:59:09,924 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 17:59:09,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-10-08 17:59:09,924 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 17:59:09,981 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,982 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,982 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,982 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,982 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,982 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,983 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,983 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,984 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,984 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,984 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,984 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,986 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,986 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,986 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,987 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,987 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,987 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,993 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,994 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,997 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,998 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:09,998 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:10,000 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:10,002 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:10,002 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 17:59:10,016 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-08 17:59:10,081 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 17:59:10,088 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-08 17:59:10,089 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-10-08 17:59:10,104 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 17:59:10,114 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 103 transitions, 230 flow [2021-10-08 17:59:10,117 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 103 transitions, 230 flow [2021-10-08 17:59:10,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 103 transitions, 230 flow [2021-10-08 17:59:10,169 INFO L129 PetriNetUnfolder]: 7/100 cut-off events. [2021-10-08 17:59:10,169 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-08 17:59:10,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 7/100 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2021-10-08 17:59:10,181 INFO L116 LiptonReduction]: Number of co-enabled transitions 864 [2021-10-08 17:59:20,443 INFO L131 LiptonReduction]: Checked pairs total: 1582 [2021-10-08 17:59:20,443 INFO L133 LiptonReduction]: Total number of compositions: 96 [2021-10-08 17:59:20,453 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 38 transitions, 100 flow [2021-10-08 17:59:20,477 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 159 states, 145 states have (on average 3.4275862068965517) internal successors, (497), 158 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 145 states have (on average 3.4275862068965517) internal successors, (497), 158 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-08 17:59:20,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:20,486 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-08 17:59:20,487 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:20,492 INFO L82 PathProgramCache]: Analyzing trace with hash 412, now seen corresponding path program 1 times [2021-10-08 17:59:20,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:20,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86685583] [2021-10-08 17:59:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:20,504 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:20,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:20,505 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:20,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-08 17:59:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:20,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-08 17:59:20,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:20,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:20,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:20,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86685583] [2021-10-08 17:59:20,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86685583] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:20,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:20,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-08 17:59:20,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735374251] [2021-10-08 17:59:20,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-08 17:59:20,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:20,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-08 17:59:20,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-08 17:59:20,604 INFO L87 Difference]: Start difference. First operand has 159 states, 145 states have (on average 3.4275862068965517) internal successors, (497), 158 states have internal predecessors, (497), 0 states have call successors, (0), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:20,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:20,630 INFO L93 Difference]: Finished difference Result 156 states and 494 transitions. [2021-10-08 17:59:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-08 17:59:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2021-10-08 17:59:20,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:20,646 INFO L225 Difference]: With dead ends: 156 [2021-10-08 17:59:20,646 INFO L226 Difference]: Without dead ends: 156 [2021-10-08 17:59:20,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-08 17:59:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-08 17:59:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-10-08 17:59:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 145 states have (on average 3.406896551724138) internal successors, (494), 155 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 494 transitions. [2021-10-08 17:59:20,706 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 494 transitions. Word has length 1 [2021-10-08 17:59:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:20,707 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 494 transitions. [2021-10-08 17:59:20,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 494 transitions. [2021-10-08 17:59:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:59:20,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:20,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:59:20,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:20,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:20,920 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash 404053, now seen corresponding path program 1 times [2021-10-08 17:59:20,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:20,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315238656] [2021-10-08 17:59:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:20,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:20,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:20,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:20,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-08 17:59:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:59:21,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:21,136 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 17:59:21,137 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 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-08 17:59:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:21,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:21,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:21,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315238656] [2021-10-08 17:59:21,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315238656] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:21,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:21,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:59:21,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325507042] [2021-10-08 17:59:21,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:59:21,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:21,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:59:21,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:59:21,220 INFO L87 Difference]: Start difference. First operand 156 states and 494 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:21,278 INFO L93 Difference]: Finished difference Result 147 states and 470 transitions. [2021-10-08 17:59:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:59:21,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 17:59:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:21,281 INFO L225 Difference]: With dead ends: 147 [2021-10-08 17:59:21,282 INFO L226 Difference]: Without dead ends: 147 [2021-10-08 17:59:21,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:59:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-08 17:59:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-10-08 17:59:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 138 states have (on average 3.4057971014492754) internal successors, (470), 146 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 470 transitions. [2021-10-08 17:59:21,312 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 470 transitions. Word has length 3 [2021-10-08 17:59:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:21,313 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 470 transitions. [2021-10-08 17:59:21,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 470 transitions. [2021-10-08 17:59:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 17:59:21,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:21,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 17:59:21,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:21,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:21,530 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:21,532 INFO L82 PathProgramCache]: Analyzing trace with hash 404054, now seen corresponding path program 1 times [2021-10-08 17:59:21,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:21,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133906727] [2021-10-08 17:59:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:21,534 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:21,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:21,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:21,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-08 17:59:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:21,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:59:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:21,781 INFO L354 Elim1Store]: treesize reduction 141, result has 23.8 percent of original size [2021-10-08 17:59:21,782 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 4 case distinctions, treesize of input 34 treesize of output 64 [2021-10-08 17:59:21,804 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 66 treesize of output 64 [2021-10-08 17:59:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:22,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:22,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:22,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133906727] [2021-10-08 17:59:22,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133906727] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:22,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:22,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:59:22,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214866387] [2021-10-08 17:59:22,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:59:22,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:59:22,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:22,160 INFO L87 Difference]: Start difference. First operand 147 states and 470 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:22,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:22,213 INFO L93 Difference]: Finished difference Result 138 states and 446 transitions. [2021-10-08 17:59:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:59:22,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-08 17:59:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:22,216 INFO L225 Difference]: With dead ends: 138 [2021-10-08 17:59:22,216 INFO L226 Difference]: Without dead ends: 138 [2021-10-08 17:59:22,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-08 17:59:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-10-08 17:59:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 131 states have (on average 3.404580152671756) internal successors, (446), 137 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 446 transitions. [2021-10-08 17:59:22,232 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 446 transitions. Word has length 3 [2021-10-08 17:59:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:22,232 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 446 transitions. [2021-10-08 17:59:22,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 446 transitions. [2021-10-08 17:59:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:59:22,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:22,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:59:22,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:22,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:22,447 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash 388302986, now seen corresponding path program 1 times [2021-10-08 17:59:22,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:22,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180009176] [2021-10-08 17:59:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:22,450 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:22,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:22,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:22,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-08 17:59:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:59:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:22,670 INFO L354 Elim1Store]: treesize reduction 141, result has 23.8 percent of original size [2021-10-08 17:59:22,671 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 4 case distinctions, treesize of input 18 treesize of output 49 [2021-10-08 17:59:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:22,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:22,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:22,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180009176] [2021-10-08 17:59:22,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180009176] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:22,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:22,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:59:22,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585755598] [2021-10-08 17:59:22,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:59:22,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:22,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:59:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:22,871 INFO L87 Difference]: Start difference. First operand 138 states and 446 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:22,905 INFO L93 Difference]: Finished difference Result 127 states and 415 transitions. [2021-10-08 17:59:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:59:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 17:59:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:22,908 INFO L225 Difference]: With dead ends: 127 [2021-10-08 17:59:22,908 INFO L226 Difference]: Without dead ends: 127 [2021-10-08 17:59:22,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-08 17:59:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-10-08 17:59:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 3.401639344262295) internal successors, (415), 126 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 415 transitions. [2021-10-08 17:59:22,920 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 415 transitions. Word has length 5 [2021-10-08 17:59:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:22,921 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 415 transitions. [2021-10-08 17:59:22,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 415 transitions. [2021-10-08 17:59:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 17:59:22,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:22,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-08 17:59:22,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:23,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:23,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:23,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:23,137 INFO L82 PathProgramCache]: Analyzing trace with hash 388302987, now seen corresponding path program 1 times [2021-10-08 17:59:23,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:23,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493972253] [2021-10-08 17:59:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:23,138 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:23,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:23,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:23,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-08 17:59:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:23,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-08 17:59:23,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:23,225 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 17:59:23,226 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 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-08 17:59:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:23,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:23,275 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:23,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493972253] [2021-10-08 17:59:23,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493972253] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:23,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:23,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-08 17:59:23,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146093778] [2021-10-08 17:59:23,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 17:59:23,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 17:59:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:59:23,278 INFO L87 Difference]: Start difference. First operand 127 states and 415 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:23,302 INFO L93 Difference]: Finished difference Result 116 states and 384 transitions. [2021-10-08 17:59:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:59:23,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-08 17:59:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:23,304 INFO L225 Difference]: With dead ends: 116 [2021-10-08 17:59:23,304 INFO L226 Difference]: Without dead ends: 116 [2021-10-08 17:59:23,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 17:59:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-08 17:59:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-08 17:59:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 3.398230088495575) internal successors, (384), 115 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 384 transitions. [2021-10-08 17:59:23,313 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 384 transitions. Word has length 5 [2021-10-08 17:59:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:23,314 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 384 transitions. [2021-10-08 17:59:23,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 384 transitions. [2021-10-08 17:59:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:59:23,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:23,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:23,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:23,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:23,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:23,529 INFO L82 PathProgramCache]: Analyzing trace with hash -502974161, now seen corresponding path program 1 times [2021-10-08 17:59:23,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:23,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923146883] [2021-10-08 17:59:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:23,531 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:23,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:23,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:23,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-08 17:59:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:23,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:59:23,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:23,635 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-08 17:59:23,637 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 24 treesize of output 31 [2021-10-08 17:59:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:23,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:23,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:23,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923146883] [2021-10-08 17:59:23,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923146883] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:23,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:23,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:59:23,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631461328] [2021-10-08 17:59:23,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:59:23,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:59:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:23,832 INFO L87 Difference]: Start difference. First operand 116 states and 384 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) [2021-10-08 17:59:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:23,864 INFO L93 Difference]: Finished difference Result 98 states and 312 transitions. [2021-10-08 17:59:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:59:23,865 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 [2021-10-08 17:59:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:23,866 INFO L225 Difference]: With dead ends: 98 [2021-10-08 17:59:23,866 INFO L226 Difference]: Without dead ends: 98 [2021-10-08 17:59:23,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-08 17:59:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-08 17:59:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 3.25) internal successors, (312), 97 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 312 transitions. [2021-10-08 17:59:23,873 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 312 transitions. Word has length 7 [2021-10-08 17:59:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:23,873 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 312 transitions. [2021-10-08 17:59:23,874 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) [2021-10-08 17:59:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 312 transitions. [2021-10-08 17:59:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 17:59:23,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:23,875 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:23,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:24,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:24,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:24,090 INFO L82 PathProgramCache]: Analyzing trace with hash -502974160, now seen corresponding path program 1 times [2021-10-08 17:59:24,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:24,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600878845] [2021-10-08 17:59:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:24,091 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:24,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:24,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-08 17:59:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:59:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:24,338 INFO L354 Elim1Store]: treesize reduction 141, result has 23.8 percent of original size [2021-10-08 17:59:24,338 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 4 case distinctions, treesize of input 29 treesize of output 59 [2021-10-08 17:59:24,345 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 60 treesize of output 58 [2021-10-08 17:59:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:24,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:24,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:24,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600878845] [2021-10-08 17:59:24,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600878845] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:24,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:24,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:59:24,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645950241] [2021-10-08 17:59:24,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:59:24,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:24,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:59:24,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:24,644 INFO L87 Difference]: Start difference. First operand 98 states and 312 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) [2021-10-08 17:59:24,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:24,670 INFO L93 Difference]: Finished difference Result 80 states and 240 transitions. [2021-10-08 17:59:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:59:24,671 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 [2021-10-08 17:59:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:24,673 INFO L225 Difference]: With dead ends: 80 [2021-10-08 17:59:24,673 INFO L226 Difference]: Without dead ends: 80 [2021-10-08 17:59:24,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-08 17:59:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-08 17:59:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 3.037974683544304) internal successors, (240), 79 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 240 transitions. [2021-10-08 17:59:24,678 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 240 transitions. Word has length 7 [2021-10-08 17:59:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:24,678 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 240 transitions. [2021-10-08 17:59:24,678 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) [2021-10-08 17:59:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 240 transitions. [2021-10-08 17:59:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 17:59:24,680 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:24,680 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:24,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:24,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:24,891 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2032693309, now seen corresponding path program 1 times [2021-10-08 17:59:24,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:24,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312131296] [2021-10-08 17:59:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:24,893 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:24,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:24,894 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:24,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-08 17:59:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:24,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 17:59:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:25,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:25,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:25,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312131296] [2021-10-08 17:59:25,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312131296] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:25,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:25,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-08 17:59:25,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96354068] [2021-10-08 17:59:25,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:59:25,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:59:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:25,145 INFO L87 Difference]: Start difference. First operand 80 states and 240 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:25,166 INFO L93 Difference]: Finished difference Result 157 states and 477 transitions. [2021-10-08 17:59:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 17:59:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 17:59:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:25,169 INFO L225 Difference]: With dead ends: 157 [2021-10-08 17:59:25,169 INFO L226 Difference]: Without dead ends: 150 [2021-10-08 17:59:25,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 17:59:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-08 17:59:25,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 114. [2021-10-08 17:59:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 3.0353982300884956) internal successors, (343), 113 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:25,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 343 transitions. [2021-10-08 17:59:25,176 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 343 transitions. Word has length 16 [2021-10-08 17:59:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:25,177 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 343 transitions. [2021-10-08 17:59:25,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:25,177 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 343 transitions. [2021-10-08 17:59:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 17:59:25,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:25,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:25,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:25,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:25,393 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:25,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1626581719, now seen corresponding path program 1 times [2021-10-08 17:59:25,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:25,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165578349] [2021-10-08 17:59:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:25,396 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:25,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:25,397 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:25,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-08 17:59:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:59:25,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:25,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:25,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:25,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165578349] [2021-10-08 17:59:25,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165578349] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:25,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:25,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-08 17:59:25,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711972610] [2021-10-08 17:59:25,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 17:59:25,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 17:59:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 17:59:25,595 INFO L87 Difference]: Start difference. First operand 114 states and 343 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:25,697 INFO L93 Difference]: Finished difference Result 202 states and 565 transitions. [2021-10-08 17:59:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 17:59:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-08 17:59:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:25,701 INFO L225 Difference]: With dead ends: 202 [2021-10-08 17:59:25,701 INFO L226 Difference]: Without dead ends: 178 [2021-10-08 17:59:25,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-08 17:59:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-08 17:59:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 156. [2021-10-08 17:59:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9806451612903224) internal successors, (462), 155 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 462 transitions. [2021-10-08 17:59:25,711 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 462 transitions. Word has length 17 [2021-10-08 17:59:25,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:25,712 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 462 transitions. [2021-10-08 17:59:25,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 462 transitions. [2021-10-08 17:59:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 17:59:25,714 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:25,714 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:25,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:25,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:25,929 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1949608137, now seen corresponding path program 2 times [2021-10-08 17:59:25,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:25,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991891377] [2021-10-08 17:59:25,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:59:25,931 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:25,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:25,933 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:25,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-08 17:59:26,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:59:26,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:26,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:59:26,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:26,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:26,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:26,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991891377] [2021-10-08 17:59:26,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991891377] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-08 17:59:26,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:26,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2021-10-08 17:59:26,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234295406] [2021-10-08 17:59:26,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-08 17:59:26,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-08 17:59:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-08 17:59:26,250 INFO L87 Difference]: Start difference. First operand 156 states and 462 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:26,397 INFO L93 Difference]: Finished difference Result 196 states and 538 transitions. [2021-10-08 17:59:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 17:59:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-08 17:59:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:26,401 INFO L225 Difference]: With dead ends: 196 [2021-10-08 17:59:26,401 INFO L226 Difference]: Without dead ends: 196 [2021-10-08 17:59:26,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-08 17:59:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-08 17:59:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 130. [2021-10-08 17:59:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 3.007751937984496) internal successors, (388), 129 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 388 transitions. [2021-10-08 17:59:26,410 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 388 transitions. Word has length 17 [2021-10-08 17:59:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:26,411 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 388 transitions. [2021-10-08 17:59:26,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 388 transitions. [2021-10-08 17:59:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-08 17:59:26,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:26,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:26,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:26,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:26,629 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1787605819, now seen corresponding path program 1 times [2021-10-08 17:59:26,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:26,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807085456] [2021-10-08 17:59:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:26,631 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:26,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:26,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-08 17:59:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 17:59:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:26,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:26,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:26,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807085456] [2021-10-08 17:59:26,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807085456] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-08 17:59:26,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-08 17:59:26,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-10-08 17:59:26,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58800788] [2021-10-08 17:59:26,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 17:59:26,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 17:59:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 17:59:26,850 INFO L87 Difference]: Start difference. First operand 130 states and 388 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:26,901 INFO L93 Difference]: Finished difference Result 204 states and 581 transitions. [2021-10-08 17:59:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 17:59:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 18 [2021-10-08 17:59:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:26,904 INFO L225 Difference]: With dead ends: 204 [2021-10-08 17:59:26,904 INFO L226 Difference]: Without dead ends: 204 [2021-10-08 17:59:26,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 17:59:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-08 17:59:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 148. [2021-10-08 17:59:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.1156462585034013) internal successors, (458), 147 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 458 transitions. [2021-10-08 17:59:26,914 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 458 transitions. Word has length 18 [2021-10-08 17:59:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:26,914 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 458 transitions. [2021-10-08 17:59:26,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 458 transitions. [2021-10-08 17:59:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:59:26,916 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:26,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:26,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:27,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:27,131 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash -634359317, now seen corresponding path program 1 times [2021-10-08 17:59:27,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:27,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494810015] [2021-10-08 17:59:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:27,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:27,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:27,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:27,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-08 17:59:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:59:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:27,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:27,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:27,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494810015] [2021-10-08 17:59:27,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494810015] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:59:27,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:59:27,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-10-08 17:59:27,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446821617] [2021-10-08 17:59:27,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:59:27,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:59:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:59:27,544 INFO L87 Difference]: Start difference. First operand 148 states and 458 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2021-10-08 17:59:27,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:27,686 INFO L93 Difference]: Finished difference Result 391 states and 1211 transitions. [2021-10-08 17:59:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 17:59:27,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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 19 [2021-10-08 17:59:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:27,691 INFO L225 Difference]: With dead ends: 391 [2021-10-08 17:59:27,691 INFO L226 Difference]: Without dead ends: 380 [2021-10-08 17:59:27,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:59:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-10-08 17:59:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 218. [2021-10-08 17:59:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.2580645161290325) internal successors, (707), 217 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 707 transitions. [2021-10-08 17:59:27,703 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 707 transitions. Word has length 19 [2021-10-08 17:59:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:27,704 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 707 transitions. [2021-10-08 17:59:27,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2021-10-08 17:59:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 707 transitions. [2021-10-08 17:59:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:59:27,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:27,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:27,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:27,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:27,910 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:27,911 INFO L82 PathProgramCache]: Analyzing trace with hash 705538687, now seen corresponding path program 2 times [2021-10-08 17:59:27,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:27,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800180991] [2021-10-08 17:59:27,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:59:27,912 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:27,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:27,914 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:27,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-08 17:59:28,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:59:28,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 17:59:28,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:28,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 17:59:28,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:28,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800180991] [2021-10-08 17:59:28,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800180991] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:59:28,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:59:28,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-10-08 17:59:28,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260094151] [2021-10-08 17:59:28,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:59:28,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:28,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:59:28,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:59:28,409 INFO L87 Difference]: Start difference. First operand 218 states and 707 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2021-10-08 17:59:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:28,728 INFO L93 Difference]: Finished difference Result 349 states and 1122 transitions. [2021-10-08 17:59:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-08 17:59:28,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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 19 [2021-10-08 17:59:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:28,732 INFO L225 Difference]: With dead ends: 349 [2021-10-08 17:59:28,732 INFO L226 Difference]: Without dead ends: 322 [2021-10-08 17:59:28,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:59:28,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-08 17:59:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 268. [2021-10-08 17:59:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.352059925093633) internal successors, (895), 267 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 895 transitions. [2021-10-08 17:59:28,745 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 895 transitions. Word has length 19 [2021-10-08 17:59:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:28,746 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 895 transitions. [2021-10-08 17:59:28,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2021-10-08 17:59:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 895 transitions. [2021-10-08 17:59:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:59:28,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:28,748 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:28,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:28,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:28,961 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:28,962 INFO L82 PathProgramCache]: Analyzing trace with hash -940581089, now seen corresponding path program 3 times [2021-10-08 17:59:28,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:28,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71480893] [2021-10-08 17:59:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:59:28,963 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:28,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:28,965 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:28,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-08 17:59:29,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 17:59:29,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 17:59:29,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:29,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:29,617 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:29,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71480893] [2021-10-08 17:59:29,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71480893] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:59:29,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:59:29,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-08 17:59:29,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022174100] [2021-10-08 17:59:29,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 17:59:29,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 17:59:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-08 17:59:29,620 INFO L87 Difference]: Start difference. First operand 268 states and 895 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 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) [2021-10-08 17:59:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:30,428 INFO L93 Difference]: Finished difference Result 542 states and 1705 transitions. [2021-10-08 17:59:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 17:59:30,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 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 19 [2021-10-08 17:59:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:30,433 INFO L225 Difference]: With dead ends: 542 [2021-10-08 17:59:30,433 INFO L226 Difference]: Without dead ends: 478 [2021-10-08 17:59:30,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:59:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-10-08 17:59:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 294. [2021-10-08 17:59:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.3924914675767917) internal successors, (994), 293 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 994 transitions. [2021-10-08 17:59:30,448 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 994 transitions. Word has length 19 [2021-10-08 17:59:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:30,449 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 994 transitions. [2021-10-08 17:59:30,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 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) [2021-10-08 17:59:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 994 transitions. [2021-10-08 17:59:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:59:30,450 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:30,450 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:30,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:30,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:30,664 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash 289196989, now seen corresponding path program 1 times [2021-10-08 17:59:30,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:30,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65958648] [2021-10-08 17:59:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 17:59:30,667 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:30,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:30,668 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:30,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-08 17:59:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 17:59:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-08 17:59:30,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:30,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:31,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:31,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65958648] [2021-10-08 17:59:31,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65958648] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:59:31,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:59:31,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-08 17:59:31,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675128615] [2021-10-08 17:59:31,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 17:59:31,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:31,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 17:59:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-08 17:59:31,094 INFO L87 Difference]: Start difference. First operand 294 states and 994 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:31,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:31,577 INFO L93 Difference]: Finished difference Result 800 states and 2555 transitions. [2021-10-08 17:59:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-08 17:59:31,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 19 [2021-10-08 17:59:31,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:31,583 INFO L225 Difference]: With dead ends: 800 [2021-10-08 17:59:31,583 INFO L226 Difference]: Without dead ends: 800 [2021-10-08 17:59:31,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-10-08 17:59:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-10-08 17:59:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 444. [2021-10-08 17:59:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.3363431151241536) internal successors, (1478), 443 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1478 transitions. [2021-10-08 17:59:31,608 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1478 transitions. Word has length 19 [2021-10-08 17:59:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:31,608 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 1478 transitions. [2021-10-08 17:59:31,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1478 transitions. [2021-10-08 17:59:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:59:31,610 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:31,611 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:31,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:31,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:31,825 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:31,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2003518051, now seen corresponding path program 2 times [2021-10-08 17:59:31,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:31,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524906514] [2021-10-08 17:59:31,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 17:59:31,827 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:31,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:31,828 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:31,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-08 17:59:31,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:59:31,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:32,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:59:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:32,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:32,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:32,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524906514] [2021-10-08 17:59:32,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524906514] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:59:32,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:59:32,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-08 17:59:32,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733373634] [2021-10-08 17:59:32,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:59:32,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:59:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:59:32,176 INFO L87 Difference]: Start difference. First operand 444 states and 1478 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:32,477 INFO L93 Difference]: Finished difference Result 670 states and 2109 transitions. [2021-10-08 17:59:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-08 17:59:32,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-08 17:59:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:32,485 INFO L225 Difference]: With dead ends: 670 [2021-10-08 17:59:32,485 INFO L226 Difference]: Without dead ends: 654 [2021-10-08 17:59:32,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-08 17:59:32,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-10-08 17:59:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 530. [2021-10-08 17:59:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.391304347826087) internal successors, (1794), 529 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1794 transitions. [2021-10-08 17:59:32,509 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1794 transitions. Word has length 19 [2021-10-08 17:59:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:32,509 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1794 transitions. [2021-10-08 17:59:32,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1794 transitions. [2021-10-08 17:59:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 17:59:32,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:32,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:32,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:32,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:32,726 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:32,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1587895357, now seen corresponding path program 3 times [2021-10-08 17:59:32,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:32,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283774413] [2021-10-08 17:59:32,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 17:59:32,728 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:32,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:32,730 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:32,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-08 17:59:32,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-08 17:59:32,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-08 17:59:32,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:32,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:33,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:33,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283774413] [2021-10-08 17:59:33,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283774413] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:59:33,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:59:33,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-08 17:59:33,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55099166] [2021-10-08 17:59:33,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 17:59:33,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 17:59:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-08 17:59:33,087 INFO L87 Difference]: Start difference. First operand 530 states and 1794 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:33,514 INFO L93 Difference]: Finished difference Result 970 states and 3142 transitions. [2021-10-08 17:59:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 17:59:33,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 19 [2021-10-08 17:59:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:33,524 INFO L225 Difference]: With dead ends: 970 [2021-10-08 17:59:33,524 INFO L226 Difference]: Without dead ends: 970 [2021-10-08 17:59:33,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:59:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-10-08 17:59:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 576. [2021-10-08 17:59:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 3.4747826086956524) internal successors, (1998), 575 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1998 transitions. [2021-10-08 17:59:33,578 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1998 transitions. Word has length 19 [2021-10-08 17:59:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:33,578 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1998 transitions. [2021-10-08 17:59:33,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1998 transitions. [2021-10-08 17:59:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-08 17:59:33,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:33,581 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:33,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:33,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:33,795 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1146861223, now seen corresponding path program 4 times [2021-10-08 17:59:33,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:33,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955558219] [2021-10-08 17:59:33,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:59:33,797 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:33,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:33,798 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:33,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-08 17:59:33,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:59:33,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:33,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-08 17:59:33,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:34,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:34,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:34,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955558219] [2021-10-08 17:59:34,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955558219] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:59:34,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:59:34,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-08 17:59:34,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790001663] [2021-10-08 17:59:34,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 17:59:34,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 17:59:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-08 17:59:34,229 INFO L87 Difference]: Start difference. First operand 576 states and 1998 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:34,633 INFO L93 Difference]: Finished difference Result 978 states and 3122 transitions. [2021-10-08 17:59:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 17:59:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-08 17:59:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:34,641 INFO L225 Difference]: With dead ends: 978 [2021-10-08 17:59:34,641 INFO L226 Difference]: Without dead ends: 888 [2021-10-08 17:59:34,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-10-08 17:59:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-10-08 17:59:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 676. [2021-10-08 17:59:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.4918518518518518) internal successors, (2357), 675 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2357 transitions. [2021-10-08 17:59:34,674 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2357 transitions. Word has length 20 [2021-10-08 17:59:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:34,675 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 2357 transitions. [2021-10-08 17:59:34,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2357 transitions. [2021-10-08 17:59:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-08 17:59:34,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:34,678 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:34,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-08 17:59:34,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:34,897 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:34,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:34,898 INFO L82 PathProgramCache]: Analyzing trace with hash 956880467, now seen corresponding path program 5 times [2021-10-08 17:59:34,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:34,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593749780] [2021-10-08 17:59:34,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 17:59:34,900 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:34,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:34,901 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:34,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-08 17:59:35,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 17:59:35,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:35,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-08 17:59:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:35,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:35,414 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:35,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593749780] [2021-10-08 17:59:35,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593749780] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:59:35,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:59:35,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-08 17:59:35,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559033505] [2021-10-08 17:59:35,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 17:59:35,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:35,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 17:59:35,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-08 17:59:35,416 INFO L87 Difference]: Start difference. First operand 676 states and 2357 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:35,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:35,895 INFO L93 Difference]: Finished difference Result 976 states and 3131 transitions. [2021-10-08 17:59:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 17:59:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-08 17:59:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:35,904 INFO L225 Difference]: With dead ends: 976 [2021-10-08 17:59:35,905 INFO L226 Difference]: Without dead ends: 928 [2021-10-08 17:59:35,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-08 17:59:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-10-08 17:59:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 728. [2021-10-08 17:59:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 3.4662998624484183) internal successors, (2520), 727 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2520 transitions. [2021-10-08 17:59:35,939 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2520 transitions. Word has length 20 [2021-10-08 17:59:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:35,939 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 2520 transitions. [2021-10-08 17:59:35,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2520 transitions. [2021-10-08 17:59:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-08 17:59:35,945 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:35,945 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:35,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:36,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:36,160 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1790325247, now seen corresponding path program 6 times [2021-10-08 17:59:36,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:36,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881342096] [2021-10-08 17:59:36,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 17:59:36,161 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:36,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:36,163 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:36,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-08 17:59:36,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-08 17:59:36,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:36,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-08 17:59:36,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:36,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:36,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:36,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881342096] [2021-10-08 17:59:36,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881342096] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-08 17:59:36,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 17:59:36,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-08 17:59:36,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877551548] [2021-10-08 17:59:36,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 17:59:36,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-08 17:59:36,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 17:59:36,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-08 17:59:36,762 INFO L87 Difference]: Start difference. First operand 728 states and 2520 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 17:59:37,856 INFO L93 Difference]: Finished difference Result 1594 states and 5076 transitions. [2021-10-08 17:59:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-08 17:59:37,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 20 [2021-10-08 17:59:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 17:59:37,871 INFO L225 Difference]: With dead ends: 1594 [2021-10-08 17:59:37,871 INFO L226 Difference]: Without dead ends: 1574 [2021-10-08 17:59:37,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2021-10-08 17:59:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-10-08 17:59:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1056. [2021-10-08 17:59:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.5440758293838863) internal successors, (3739), 1055 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3739 transitions. [2021-10-08 17:59:37,951 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3739 transitions. Word has length 20 [2021-10-08 17:59:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 17:59:37,952 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 3739 transitions. [2021-10-08 17:59:37,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 17:59:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3739 transitions. [2021-10-08 17:59:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-08 17:59:37,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 17:59:37,956 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 17:59:37,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:38,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-08 17:59:38,174 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-10-08 17:59:38,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 17:59:38,175 INFO L82 PathProgramCache]: Analyzing trace with hash 159607209, now seen corresponding path program 4 times [2021-10-08 17:59:38,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-08 17:59:38,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299669370] [2021-10-08 17:59:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:59:38,176 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-08 17:59:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-08 17:59:38,177 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-08 17:59:38,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-08 17:59:38,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:59:38,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:59:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:38,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:38,835 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-08 17:59:38,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299669370] [2021-10-08 17:59:38,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-08 17:59:38,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [665017010] [2021-10-08 17:59:38,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:59:38,836 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-08 17:59:38,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-08 17:59:38,839 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-08 17:59:38,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-08 17:59:39,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:59:39,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:39,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:59:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:39,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:39,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-08 17:59:39,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222757585] [2021-10-08 17:59:39,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 17:59:39,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 17:59:39,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 17:59:39,493 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 17:59:39,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-08 17:59:39,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 17:59:39,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 17:59:39,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 17:59:39,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 17:59:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 17:59:39,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-08 17:59:40,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-08 17:59:40,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-08 17:59:40,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-08 17:59:40,093 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-08 17:59:40,093 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-08 17:59:40,097 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:59:40,099 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-08 17:59:40,099 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-08 17:59:40,099 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-08 17:59:40,099 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-08 17:59:40,099 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-08 17:59:40,099 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-08 17:59:40,099 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-08 17:59:40,100 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-08 17:59:40,100 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-08 17:59:40,100 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-08 17:59:40,100 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-08 17:59:40,100 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-08 17:59:40,100 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK [2021-10-08 17:59:40,100 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 17:59:40,100 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 17:59:40,101 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-08 17:59:40,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:40,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:40,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-08 17:59:40,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 17:59:40,709 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 17:59:40,709 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 17:59:40,711 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:589) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-08 17:59:40,713 INFO L168 Benchmark]: Toolchain (without parser) took 32186.42 ms. Allocated memory was 166.7 MB in the beginning and 209.7 MB in the end (delta: 43.0 MB). Free memory was 140.4 MB in the beginning and 145.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 38.4 MB. Max. memory is 8.0 GB. [2021-10-08 17:59:40,713 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 166.7 MB. Free memory is still 136.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 17:59:40,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 418.38 ms. Allocated memory is still 166.7 MB. Free memory was 140.0 MB in the beginning and 129.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-08 17:59:40,714 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.09 ms. Allocated memory is still 166.7 MB. Free memory was 129.2 MB in the beginning and 127.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 17:59:40,714 INFO L168 Benchmark]: Boogie Preprocessor took 38.94 ms. Allocated memory is still 166.7 MB. Free memory was 127.4 MB in the beginning and 126.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-08 17:59:40,715 INFO L168 Benchmark]: RCFGBuilder took 861.48 ms. Allocated memory is still 166.7 MB. Free memory was 126.1 MB in the beginning and 145.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2021-10-08 17:59:40,715 INFO L168 Benchmark]: TraceAbstraction took 30804.10 ms. Allocated memory was 166.7 MB in the beginning and 209.7 MB in the end (delta: 43.0 MB). Free memory was 144.5 MB in the beginning and 145.7 MB in the end (delta: -1.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 8.0 GB. [2021-10-08 17:59:40,717 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 166.7 MB. Free memory is still 136.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 418.38 ms. Allocated memory is still 166.7 MB. Free memory was 140.0 MB in the beginning and 129.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.09 ms. Allocated memory is still 166.7 MB. Free memory was 129.2 MB in the beginning and 127.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.94 ms. Allocated memory is still 166.7 MB. Free memory was 127.4 MB in the beginning and 126.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 861.48 ms. Allocated memory is still 166.7 MB. Free memory was 126.1 MB in the beginning and 145.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 30804.10 ms. Allocated memory was 166.7 MB in the beginning and 209.7 MB in the end (delta: 43.0 MB). Free memory was 144.5 MB in the beginning and 145.7 MB in the end (delta: -1.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10326.6ms, 106 PlacesBefore, 45 PlacesAfterwards, 103 TransitionsBefore, 38 TransitionsAfterwards, 864 CoEnabledTransitionPairs, 6 FixpointIterations, 56 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 96 TotalNumberOfCompositions, 1582 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1125, positive: 1097, positive conditional: 0, positive unconditional: 1097, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 531, positive: 529, positive conditional: 0, positive unconditional: 529, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 531, positive: 525, positive conditional: 0, positive unconditional: 525, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 28, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1125, positive: 568, positive conditional: 0, positive unconditional: 568, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 531, unknown conditional: 0, unknown unconditional: 531] , Statistics on independence cache: Total cache size (in pairs): 81, Positive cache size: 79, Positive conditional cache size: 0, Positive unconditional cache size: 79, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transformations.BlockEncodingBacktranslator.translateProgramExecution(BlockEncodingBacktranslator.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-08 17:59:40,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...