/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:22:35,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:22:35,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:22:35,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 21:22:35,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:22:35,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:22:35,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:22:35,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:22:35,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:22:35,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:22:35,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:22:35,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:22:35,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:22:35,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:22:35,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:22:35,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:22:35,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 21:22:35,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:22:35,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:22:35,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:22:35,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 21:22:35,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:22:35,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:22:35,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:22:35,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:22:35,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:22:35,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:22:35,913 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:22:35,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:22:35,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:22:35,914 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:22:35,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:22:35,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:22:35,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:22:35,915 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:22:35,915 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:22:35,916 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:22:35,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:22:35,916 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:22:35,916 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:22:35,917 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:22:35,917 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:22:35,917 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:22:35,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:22:35,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:22:35,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:22:35,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:22:35,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:22:35,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:22:35,919 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:22:35,919 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:22:35,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:22:35,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:22:35,920 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:22:36,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:22:36,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:22:36,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:22:36,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:22:36,341 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:22:36,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2021-10-13 21:22:36,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/342a6cd53/627f374d71e74b248c48929ce78aa5a0/FLAG3f0956b68 [2021-10-13 21:22:37,175 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:22:37,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2021-10-13 21:22:37,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/342a6cd53/627f374d71e74b248c48929ce78aa5a0/FLAG3f0956b68 [2021-10-13 21:22:37,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/342a6cd53/627f374d71e74b248c48929ce78aa5a0 [2021-10-13 21:22:37,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:22:37,520 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:22:37,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:22:37,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:22:37,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:22:37,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:37,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@560c47aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37, skipping insertion in model container [2021-10-13 21:22:37,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:37,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:22:37,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:22:37,784 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2021-10-13 21:22:37,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:22:37,822 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 21:22:37,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:22:37,880 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2021-10-13 21:22:37,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:22:37,891 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:22:37,922 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2021-10-13 21:22:37,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:22:37,950 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:22:37,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37 WrapperNode [2021-10-13 21:22:37,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:22:37,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:22:37,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:22:37,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:22:37,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:37,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:38,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:22:38,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:22:38,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:22:38,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:22:38,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:38,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:38,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:38,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:38,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:38,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:38,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:38,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:22:38,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:22:38,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:22:38,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:22:38,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (1/1) ... [2021-10-13 21:22:38,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:22:38,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:22:38,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 21:22:38,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 21:22:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:22:38,193 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:22:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:22:38,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:22:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 21:22:38,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 21:22:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:22:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:22:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 21:22:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:22:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:22:38,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:22:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:22:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:22:38,198 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 21:22:38,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:22:38,958 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 21:22:38,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:22:38 BoogieIcfgContainer [2021-10-13 21:22:38,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:22:38,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:22:38,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:22:38,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:22:38,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:22:37" (1/3) ... [2021-10-13 21:22:38,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e454dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:22:38, skipping insertion in model container [2021-10-13 21:22:38,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:37" (2/3) ... [2021-10-13 21:22:38,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e454dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:22:38, skipping insertion in model container [2021-10-13 21:22:38,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:22:38" (3/3) ... [2021-10-13 21:22:38,974 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2021-10-13 21:22:38,982 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:22:38,983 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-13 21:22:38,983 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:22:39,037 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,038 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,038 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,038 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,039 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,039 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,039 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,039 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,039 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,041 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,041 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,041 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,042 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,042 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,042 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,043 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,043 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,043 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,044 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,044 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,044 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,045 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,045 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,045 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,045 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,046 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,046 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,047 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,047 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,047 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,050 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,051 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,051 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,051 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,051 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,051 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,052 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,052 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,052 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,053 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,053 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,053 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,054 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,054 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,054 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,054 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,054 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,055 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,055 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,055 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,055 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,056 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,056 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,056 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,057 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,057 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,057 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,058 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,058 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,058 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,059 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,060 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,060 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,061 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,061 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,062 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,062 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,062 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,062 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,062 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,063 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,063 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,063 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,063 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,064 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,064 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,064 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,064 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,064 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,065 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,065 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,065 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,065 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,066 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,066 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,066 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,066 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,067 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,068 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,068 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,068 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,068 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,069 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,069 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,070 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,070 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,070 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,071 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,071 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,071 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,071 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,072 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,072 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,072 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,072 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,073 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,073 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,074 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,074 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,074 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,075 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,075 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,075 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,076 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,076 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,076 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,077 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,077 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,077 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,077 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,078 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,078 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,078 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,078 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,079 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,079 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,079 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,079 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,079 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,080 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,080 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,080 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,080 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,080 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,081 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,081 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,081 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,085 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,085 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,085 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,086 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,086 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,086 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,086 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,093 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,095 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,096 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,096 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,096 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,096 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,097 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,097 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:39,105 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-13 21:22:39,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:22:39,197 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 21:22:39,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-13 21:22:39,222 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:22:39,241 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 197 transitions, 418 flow [2021-10-13 21:22:39,244 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 197 transitions, 418 flow [2021-10-13 21:22:39,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 192 places, 197 transitions, 418 flow [2021-10-13 21:22:39,361 INFO L129 PetriNetUnfolder]: 15/194 cut-off events. [2021-10-13 21:22:39,362 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-13 21:22:39,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 194 events. 15/194 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 344 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 137. Up to 2 conditions per place. [2021-10-13 21:22:39,377 INFO L116 LiptonReduction]: Number of co-enabled transitions 5658 [2021-10-13 21:23:11,493 INFO L131 LiptonReduction]: Checked pairs total: 7883 [2021-10-13 21:23:11,494 INFO L133 LiptonReduction]: Total number of compositions: 214 [2021-10-13 21:23:11,505 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 59 transitions, 142 flow [2021-10-13 21:23:11,628 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:23:11,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:11,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:23:11,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash 24823, now seen corresponding path program 1 times [2021-10-13 21:23:11,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:11,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089065148] [2021-10-13 21:23:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:11,667 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:11,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:11,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:11,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 21:23:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:11,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:23:11,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:11,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:11,991 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:11,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089065148] [2021-10-13 21:23:11,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089065148] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:11,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:11,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:11,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399602471] [2021-10-13 21:23:12,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:12,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:12,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:12,033 INFO L87 Difference]: Start difference. First operand has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:12,357 INFO L93 Difference]: Finished difference Result 1604 states and 6039 transitions. [2021-10-13 21:23:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:23:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:23:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:12,406 INFO L225 Difference]: With dead ends: 1604 [2021-10-13 21:23:12,406 INFO L226 Difference]: Without dead ends: 1604 [2021-10-13 21:23:12,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-10-13 21:23:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1602. [2021-10-13 21:23:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1326 states have (on average 4.5542986425339365) internal successors, (6039), 1601 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6039 transitions. [2021-10-13 21:23:12,650 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6039 transitions. Word has length 2 [2021-10-13 21:23:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:12,651 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 6039 transitions. [2021-10-13 21:23:12,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6039 transitions. [2021-10-13 21:23:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:23:12,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:12,652 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:23:12,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:12,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:12,854 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash 24637, now seen corresponding path program 1 times [2021-10-13 21:23:12,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:12,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112702245] [2021-10-13 21:23:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:12,857 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:12,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:12,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:12,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 21:23:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:12,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:23:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:13,225 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:23:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-13 21:23:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:13,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:13,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:13,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112702245] [2021-10-13 21:23:13,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112702245] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:13,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:13,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:23:13,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132760904] [2021-10-13 21:23:13,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:23:13,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:13,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:23:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:23:13,981 INFO L87 Difference]: Start difference. First operand 1602 states and 6039 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:14,241 INFO L93 Difference]: Finished difference Result 1601 states and 6037 transitions. [2021-10-13 21:23:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:23:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:14,263 INFO L225 Difference]: With dead ends: 1601 [2021-10-13 21:23:14,263 INFO L226 Difference]: Without dead ends: 1601 [2021-10-13 21:23:14,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:23:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-10-13 21:23:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1601. [2021-10-13 21:23:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1326 states have (on average 4.552790346907994) internal successors, (6037), 1600 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 6037 transitions. [2021-10-13 21:23:14,350 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 6037 transitions. Word has length 2 [2021-10-13 21:23:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:14,350 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 6037 transitions. [2021-10-13 21:23:14,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 6037 transitions. [2021-10-13 21:23:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:23:14,351 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:14,352 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:23:14,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:14,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:14,567 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:14,568 INFO L82 PathProgramCache]: Analyzing trace with hash 24639, now seen corresponding path program 1 times [2021-10-13 21:23:14,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:14,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045053078] [2021-10-13 21:23:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:14,569 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:14,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:14,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:14,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 21:23:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:14,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:23:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:14,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:14,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:15,039 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:15,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:23:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:15,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:15,283 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:15,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045053078] [2021-10-13 21:23:15,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045053078] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:15,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:15,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:15,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703501456] [2021-10-13 21:23:15,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:15,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:15,289 INFO L87 Difference]: Start difference. First operand 1601 states and 6037 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:15,997 INFO L93 Difference]: Finished difference Result 1602 states and 6040 transitions. [2021-10-13 21:23:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:23:15,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:23:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:16,018 INFO L225 Difference]: With dead ends: 1602 [2021-10-13 21:23:16,018 INFO L226 Difference]: Without dead ends: 1602 [2021-10-13 21:23:16,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-10-13 21:23:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1602. [2021-10-13 21:23:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1327 states have (on average 4.551620195930671) internal successors, (6040), 1601 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6040 transitions. [2021-10-13 21:23:16,098 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6040 transitions. Word has length 2 [2021-10-13 21:23:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:16,099 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 6040 transitions. [2021-10-13 21:23:16,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6040 transitions. [2021-10-13 21:23:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:23:16,100 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:16,100 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:23:16,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:16,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:16,315 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:16,316 INFO L82 PathProgramCache]: Analyzing trace with hash 769474, now seen corresponding path program 1 times [2021-10-13 21:23:16,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:16,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404236112] [2021-10-13 21:23:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:16,317 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:16,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:16,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 21:23:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:16,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:23:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:16,656 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-13 21:23:16,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 215 treesize of output 250 [2021-10-13 21:23:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:22,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:22,824 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:22,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404236112] [2021-10-13 21:23:22,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404236112] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:22,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:22,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:22,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143305540] [2021-10-13 21:23:22,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:22,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:22,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:22,828 INFO L87 Difference]: Start difference. First operand 1602 states and 6040 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:23,256 INFO L93 Difference]: Finished difference Result 1307 states and 4778 transitions. [2021-10-13 21:23:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:23,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 21:23:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:23,274 INFO L225 Difference]: With dead ends: 1307 [2021-10-13 21:23:23,274 INFO L226 Difference]: Without dead ends: 1307 [2021-10-13 21:23:23,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-10-13 21:23:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1307. [2021-10-13 21:23:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1097 states have (on average 4.355515041020967) internal successors, (4778), 1306 states have internal predecessors, (4778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4778 transitions. [2021-10-13 21:23:23,339 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4778 transitions. Word has length 3 [2021-10-13 21:23:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:23,339 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 4778 transitions. [2021-10-13 21:23:23,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4778 transitions. [2021-10-13 21:23:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:23:23,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:23,340 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:23:23,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-13 21:23:23,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:23,555 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:23,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:23,556 INFO L82 PathProgramCache]: Analyzing trace with hash 769475, now seen corresponding path program 1 times [2021-10-13 21:23:23,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:23,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771280990] [2021-10-13 21:23:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:23,557 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:23,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:23,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 21:23:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:23,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 21:23:23,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:23,917 INFO L354 Elim1Store]: treesize reduction 235, result has 20.6 percent of original size [2021-10-13 21:23:23,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 85 [2021-10-13 21:23:23,928 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 107 treesize of output 105 [2021-10-13 21:23:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:34,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:35,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:35,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771280990] [2021-10-13 21:23:35,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771280990] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:23:35,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:23:35,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2021-10-13 21:23:35,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704234483] [2021-10-13 21:23:35,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:35,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:23:35,081 INFO L87 Difference]: Start difference. First operand 1307 states and 4778 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:35,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:35,326 INFO L93 Difference]: Finished difference Result 1012 states and 3516 transitions. [2021-10-13 21:23:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 21:23:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:35,338 INFO L225 Difference]: With dead ends: 1012 [2021-10-13 21:23:35,338 INFO L226 Difference]: Without dead ends: 1012 [2021-10-13 21:23:35,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:23:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-10-13 21:23:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1012. [2021-10-13 21:23:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 867 states have (on average 4.055363321799308) internal successors, (3516), 1011 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3516 transitions. [2021-10-13 21:23:35,401 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3516 transitions. Word has length 3 [2021-10-13 21:23:35,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:35,401 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3516 transitions. [2021-10-13 21:23:35,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3516 transitions. [2021-10-13 21:23:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:23:35,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:35,404 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 21:23:35,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:35,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:35,618 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:35,620 INFO L82 PathProgramCache]: Analyzing trace with hash 23853471, now seen corresponding path program 1 times [2021-10-13 21:23:35,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:35,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63461933] [2021-10-13 21:23:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:35,621 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:35,623 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:35,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 21:23:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:35,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:23:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:35,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:35,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:35,993 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:35,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:23:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:36,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:36,583 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:36,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63461933] [2021-10-13 21:23:36,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63461933] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:23:36,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:23:36,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:23:36,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903598699] [2021-10-13 21:23:36,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:23:36,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:36,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:23:36,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:23:36,589 INFO L87 Difference]: Start difference. First operand 1012 states and 3516 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:38,572 INFO L93 Difference]: Finished difference Result 5044 states and 17560 transitions. [2021-10-13 21:23:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:23:38,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:23:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:38,632 INFO L225 Difference]: With dead ends: 5044 [2021-10-13 21:23:38,633 INFO L226 Difference]: Without dead ends: 5044 [2021-10-13 21:23:38,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 745.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:23:38,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2021-10-13 21:23:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 1016. [2021-10-13 21:23:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 871 states have (on average 4.045924225028703) internal successors, (3524), 1015 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:38,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3524 transitions. [2021-10-13 21:23:38,729 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3524 transitions. Word has length 4 [2021-10-13 21:23:38,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:38,730 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 3524 transitions. [2021-10-13 21:23:38,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3524 transitions. [2021-10-13 21:23:38,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:23:38,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:38,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:23:38,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:38,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:38,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash 739480572, now seen corresponding path program 1 times [2021-10-13 21:23:38,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:38,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556140023] [2021-10-13 21:23:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:38,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:38,949 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:38,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 21:23:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:23:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:39,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:39,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:39,332 INFO L354 Elim1Store]: treesize reduction 235, result has 20.6 percent of original size [2021-10-13 21:23:39,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 89 [2021-10-13 21:23:39,341 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 480 treesize of output 448 [2021-10-13 21:23:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:45,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:45,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:45,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556140023] [2021-10-13 21:23:45,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556140023] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:23:45,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:23:45,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:23:45,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772287276] [2021-10-13 21:23:45,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:23:45,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:23:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:23:45,253 INFO L87 Difference]: Start difference. First operand 1016 states and 3524 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:46,167 INFO L93 Difference]: Finished difference Result 1925 states and 6739 transitions. [2021-10-13 21:23:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:23:46,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 21:23:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:46,185 INFO L225 Difference]: With dead ends: 1925 [2021-10-13 21:23:46,185 INFO L226 Difference]: Without dead ends: 1925 [2021-10-13 21:23:46,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:23:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-10-13 21:23:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 967. [2021-10-13 21:23:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 842 states have (on average 4.010688836104513) internal successors, (3377), 966 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3377 transitions. [2021-10-13 21:23:46,235 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3377 transitions. Word has length 5 [2021-10-13 21:23:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:46,235 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 3377 transitions. [2021-10-13 21:23:46,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3377 transitions. [2021-10-13 21:23:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:23:46,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:46,236 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:23:46,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:46,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:46,452 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash 739480574, now seen corresponding path program 1 times [2021-10-13 21:23:46,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:46,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562937130] [2021-10-13 21:23:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:46,454 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:46,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:46,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:46,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 21:23:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:23:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:46,794 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:23:46,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 157 treesize of output 194 [2021-10-13 21:23:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:52,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:52,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:52,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562937130] [2021-10-13 21:23:52,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562937130] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:52,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:52,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:52,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822553275] [2021-10-13 21:23:52,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:52,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:52,642 INFO L87 Difference]: Start difference. First operand 967 states and 3377 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:52,839 INFO L93 Difference]: Finished difference Result 918 states and 3230 transitions. [2021-10-13 21:23:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:52,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 21:23:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:52,846 INFO L225 Difference]: With dead ends: 918 [2021-10-13 21:23:52,846 INFO L226 Difference]: Without dead ends: 918 [2021-10-13 21:23:52,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-10-13 21:23:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 918. [2021-10-13 21:23:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 813 states have (on average 3.972939729397294) internal successors, (3230), 917 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 3230 transitions. [2021-10-13 21:23:52,880 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 3230 transitions. Word has length 5 [2021-10-13 21:23:52,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:52,881 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 3230 transitions. [2021-10-13 21:23:52,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 3230 transitions. [2021-10-13 21:23:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:23:52,882 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:52,882 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:23:52,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:53,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:53,099 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:53,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1449054840, now seen corresponding path program 1 times [2021-10-13 21:23:53,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:53,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482889260] [2021-10-13 21:23:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:53,101 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:53,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:53,102 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:53,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 21:23:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:53,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:23:53,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:53,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:53,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 21:23:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:53,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:53,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482889260] [2021-10-13 21:23:53,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482889260] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:23:53,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:23:53,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:23:53,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993965050] [2021-10-13 21:23:53,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:23:53,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:53,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:23:53,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:23:53,572 INFO L87 Difference]: Start difference. First operand 918 states and 3230 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:55,061 INFO L93 Difference]: Finished difference Result 4091 states and 14753 transitions. [2021-10-13 21:23:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 21:23:55,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:23:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:55,086 INFO L225 Difference]: With dead ends: 4091 [2021-10-13 21:23:55,086 INFO L226 Difference]: Without dead ends: 4091 [2021-10-13 21:23:55,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:23:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2021-10-13 21:23:55,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 1032. [2021-10-13 21:23:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 927 states have (on average 4.405609492988134) internal successors, (4084), 1031 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 4084 transitions. [2021-10-13 21:23:55,158 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 4084 transitions. Word has length 6 [2021-10-13 21:23:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:55,160 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 4084 transitions. [2021-10-13 21:23:55,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 4084 transitions. [2021-10-13 21:23:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:23:55,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:55,161 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:23:55,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:55,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:55,375 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1449054841, now seen corresponding path program 1 times [2021-10-13 21:23:55,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:55,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110593085] [2021-10-13 21:23:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:55,377 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:55,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:55,379 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:55,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 21:23:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:55,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:23:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:55,668 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:23:55,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-13 21:23:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:56,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:56,150 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:56,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110593085] [2021-10-13 21:23:56,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110593085] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:56,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:56,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 21:23:56,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185205729] [2021-10-13 21:23:56,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:56,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:56,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:56,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:56,152 INFO L87 Difference]: Start difference. First operand 1032 states and 4084 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:56,329 INFO L93 Difference]: Finished difference Result 694 states and 2692 transitions. [2021-10-13 21:23:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:23:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:23:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:56,335 INFO L225 Difference]: With dead ends: 694 [2021-10-13 21:23:56,335 INFO L226 Difference]: Without dead ends: 694 [2021-10-13 21:23:56,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:23:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-10-13 21:23:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2021-10-13 21:23:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 642 states have (on average 4.193146417445483) internal successors, (2692), 693 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2692 transitions. [2021-10-13 21:23:56,360 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2692 transitions. Word has length 6 [2021-10-13 21:23:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:56,360 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 2692 transitions. [2021-10-13 21:23:56,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2692 transitions. [2021-10-13 21:23:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:23:56,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:56,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:23:56,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:56,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:56,575 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:56,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:56,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1449054915, now seen corresponding path program 1 times [2021-10-13 21:23:56,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:56,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897619345] [2021-10-13 21:23:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:56,577 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:56,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:56,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:56,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 21:23:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:56,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:23:56,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:56,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:56,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:56,929 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:56,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:23:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:57,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:57,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:57,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897619345] [2021-10-13 21:23:57,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897619345] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:57,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:57,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:23:57,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78808475] [2021-10-13 21:23:57,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:23:57,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:57,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:23:57,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:23:57,359 INFO L87 Difference]: Start difference. First operand 694 states and 2692 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:58,161 INFO L93 Difference]: Finished difference Result 1378 states and 5454 transitions. [2021-10-13 21:23:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 21:23:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:23:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:58,171 INFO L225 Difference]: With dead ends: 1378 [2021-10-13 21:23:58,171 INFO L226 Difference]: Without dead ends: 1378 [2021-10-13 21:23:58,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:23:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-10-13 21:23:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1038. [2021-10-13 21:23:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 986 states have (on average 4.557809330628803) internal successors, (4494), 1037 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 4494 transitions. [2021-10-13 21:23:58,220 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 4494 transitions. Word has length 6 [2021-10-13 21:23:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:58,220 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 4494 transitions. [2021-10-13 21:23:58,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 4494 transitions. [2021-10-13 21:23:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:23:58,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:58,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:23:58,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:58,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:58,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1971030898, now seen corresponding path program 1 times [2021-10-13 21:23:58,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:58,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577109518] [2021-10-13 21:23:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:58,437 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:58,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:58,439 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:58,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 21:23:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:23:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:58,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:58,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:58,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577109518] [2021-10-13 21:23:58,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577109518] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:58,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:58,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 21:23:58,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779673440] [2021-10-13 21:23:58,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:58,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:58,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:58,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:58,581 INFO L87 Difference]: Start difference. First operand 1038 states and 4494 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:58,675 INFO L93 Difference]: Finished difference Result 1120 states and 4296 transitions. [2021-10-13 21:23:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:23:58,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:23:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:58,684 INFO L225 Difference]: With dead ends: 1120 [2021-10-13 21:23:58,684 INFO L226 Difference]: Without dead ends: 1120 [2021-10-13 21:23:58,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-10-13 21:23:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 952. [2021-10-13 21:23:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 900 states have (on average 4.277777777777778) internal successors, (3850), 951 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3850 transitions. [2021-10-13 21:23:58,748 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3850 transitions. Word has length 7 [2021-10-13 21:23:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:58,748 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 3850 transitions. [2021-10-13 21:23:58,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3850 transitions. [2021-10-13 21:23:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:23:58,749 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:58,749 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:23:58,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:58,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:58,963 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:23:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:58,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1971243794, now seen corresponding path program 1 times [2021-10-13 21:23:58,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:58,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053812942] [2021-10-13 21:23:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:58,967 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:58,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:58,968 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:23:58,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 21:23:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:59,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:23:59,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:59,310 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:23:59,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-13 21:23:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:59,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:23:59,818 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:59,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053812942] [2021-10-13 21:23:59,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053812942] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:59,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:59,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:23:59,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900295319] [2021-10-13 21:23:59,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:23:59,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:59,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:23:59,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:23:59,821 INFO L87 Difference]: Start difference. First operand 952 states and 3850 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:59,947 INFO L93 Difference]: Finished difference Result 887 states and 3608 transitions. [2021-10-13 21:23:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:23:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:59,952 INFO L225 Difference]: With dead ends: 887 [2021-10-13 21:23:59,952 INFO L226 Difference]: Without dead ends: 887 [2021-10-13 21:23:59,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:23:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-10-13 21:23:59,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2021-10-13 21:23:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 847 states have (on average 4.259740259740259) internal successors, (3608), 886 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3608 transitions. [2021-10-13 21:23:59,989 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3608 transitions. Word has length 7 [2021-10-13 21:23:59,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:59,989 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 3608 transitions. [2021-10-13 21:23:59,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3608 transitions. [2021-10-13 21:23:59,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:23:59,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:59,990 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:00,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:00,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:00,205 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:00,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1971243796, now seen corresponding path program 1 times [2021-10-13 21:24:00,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:00,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921530356] [2021-10-13 21:24:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:00,207 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:00,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:00,208 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:00,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 21:24:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:24:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:00,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:00,602 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:00,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:24:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:00,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:01,074 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:01,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921530356] [2021-10-13 21:24:01,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921530356] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:01,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:01,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:24:01,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100342740] [2021-10-13 21:24:01,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:24:01,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:24:01,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:24:01,076 INFO L87 Difference]: Start difference. First operand 887 states and 3608 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:01,536 INFO L93 Difference]: Finished difference Result 1635 states and 6717 transitions. [2021-10-13 21:24:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:24:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:24:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:01,545 INFO L225 Difference]: With dead ends: 1635 [2021-10-13 21:24:01,545 INFO L226 Difference]: Without dead ends: 1635 [2021-10-13 21:24:01,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:24:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-10-13 21:24:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 822. [2021-10-13 21:24:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 794 states have (on average 4.239294710327456) internal successors, (3366), 821 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 3366 transitions. [2021-10-13 21:24:01,590 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 3366 transitions. Word has length 7 [2021-10-13 21:24:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:01,591 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 3366 transitions. [2021-10-13 21:24:01,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 3366 transitions. [2021-10-13 21:24:01,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:24:01,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:01,592 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 21:24:01,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:01,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:01,806 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:01,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:01,807 INFO L82 PathProgramCache]: Analyzing trace with hash 462857311, now seen corresponding path program 2 times [2021-10-13 21:24:01,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:01,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384661297] [2021-10-13 21:24:01,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:24:01,808 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:01,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:01,810 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:01,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 21:24:01,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:24:01,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:24:01,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:01,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:01,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:02,252 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:02,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:24:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:02,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:03,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:03,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384661297] [2021-10-13 21:24:03,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384661297] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:03,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:03,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:24:03,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557780788] [2021-10-13 21:24:03,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:24:03,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:24:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:24:03,928 INFO L87 Difference]: Start difference. First operand 822 states and 3366 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:13,145 INFO L93 Difference]: Finished difference Result 10586 states and 43594 transitions. [2021-10-13 21:24:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:24:13,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 21:24:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:13,207 INFO L225 Difference]: With dead ends: 10586 [2021-10-13 21:24:13,208 INFO L226 Difference]: Without dead ends: 10586 [2021-10-13 21:24:13,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4771.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:24:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2021-10-13 21:24:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 830. [2021-10-13 21:24:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 802 states have (on average 4.216957605985037) internal successors, (3382), 829 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 3382 transitions. [2021-10-13 21:24:13,421 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 3382 transitions. Word has length 8 [2021-10-13 21:24:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:13,421 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 3382 transitions. [2021-10-13 21:24:13,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 3382 transitions. [2021-10-13 21:24:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:24:13,422 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:13,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:13,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:13,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:13,637 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:13,638 INFO L82 PathProgramCache]: Analyzing trace with hash 979009095, now seen corresponding path program 1 times [2021-10-13 21:24:13,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:13,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582756989] [2021-10-13 21:24:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:13,639 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:13,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:13,640 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:13,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 21:24:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:13,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:24:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:13,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:13,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:14,035 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:14,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:24:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:24:14,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:24:14,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:14,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582756989] [2021-10-13 21:24:14,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582756989] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:24:14,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:24:14,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:24:14,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503252088] [2021-10-13 21:24:14,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:24:14,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:14,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:24:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:24:14,613 INFO L87 Difference]: Start difference. First operand 830 states and 3382 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:15,513 INFO L93 Difference]: Finished difference Result 1622 states and 6938 transitions. [2021-10-13 21:24:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 21:24:15,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 21:24:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:15,523 INFO L225 Difference]: With dead ends: 1622 [2021-10-13 21:24:15,523 INFO L226 Difference]: Without dead ends: 1622 [2021-10-13 21:24:15,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:24:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-10-13 21:24:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1220. [2021-10-13 21:24:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1192 states have (on average 4.701342281879195) internal successors, (5604), 1219 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 5604 transitions. [2021-10-13 21:24:15,612 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 5604 transitions. Word has length 8 [2021-10-13 21:24:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:15,613 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 5604 transitions. [2021-10-13 21:24:15,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 5604 transitions. [2021-10-13 21:24:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:24:15,614 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:15,614 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:15,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-13 21:24:15,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:15,827 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:15,829 INFO L82 PathProgramCache]: Analyzing trace with hash 79372718, now seen corresponding path program 1 times [2021-10-13 21:24:15,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:15,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19044787] [2021-10-13 21:24:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:15,830 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:15,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:15,831 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:15,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 21:24:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:24:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:24:15,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:24:16,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:16,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19044787] [2021-10-13 21:24:16,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19044787] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:24:16,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:24:16,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 21:24:16,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004574094] [2021-10-13 21:24:16,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:24:16,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:16,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:24:16,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:24:16,011 INFO L87 Difference]: Start difference. First operand 1220 states and 5604 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:16,072 INFO L93 Difference]: Finished difference Result 1322 states and 5626 transitions. [2021-10-13 21:24:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:24:16,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 21:24:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:16,077 INFO L225 Difference]: With dead ends: 1322 [2021-10-13 21:24:16,077 INFO L226 Difference]: Without dead ends: 1322 [2021-10-13 21:24:16,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:24:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-10-13 21:24:16,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1110. [2021-10-13 21:24:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1091 states have (on average 4.5270394133822185) internal successors, (4939), 1109 states have internal predecessors, (4939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 4939 transitions. [2021-10-13 21:24:16,120 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 4939 transitions. Word has length 9 [2021-10-13 21:24:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:16,120 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 4939 transitions. [2021-10-13 21:24:16,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 4939 transitions. [2021-10-13 21:24:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:24:16,122 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:16,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:16,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:16,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:16,335 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash 284512916, now seen corresponding path program 1 times [2021-10-13 21:24:16,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:16,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569193650] [2021-10-13 21:24:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:16,337 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:16,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:16,338 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:16,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 21:24:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:16,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:24:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:24:16,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:24:16,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:16,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569193650] [2021-10-13 21:24:16,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569193650] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:24:16,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:24:16,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 21:24:16,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044431184] [2021-10-13 21:24:16,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:24:16,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:16,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:24:16,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:24:16,530 INFO L87 Difference]: Start difference. First operand 1110 states and 4939 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:16,595 INFO L93 Difference]: Finished difference Result 1240 states and 5184 transitions. [2021-10-13 21:24:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:24:16,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 21:24:16,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:16,601 INFO L225 Difference]: With dead ends: 1240 [2021-10-13 21:24:16,601 INFO L226 Difference]: Without dead ends: 1240 [2021-10-13 21:24:16,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:24:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-10-13 21:24:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1110. [2021-10-13 21:24:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1091 states have (on average 4.418881759853345) internal successors, (4821), 1109 states have internal predecessors, (4821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 4821 transitions. [2021-10-13 21:24:16,636 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 4821 transitions. Word has length 9 [2021-10-13 21:24:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:16,637 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 4821 transitions. [2021-10-13 21:24:16,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 4821 transitions. [2021-10-13 21:24:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:24:16,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:16,638 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:16,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:16,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:16,851 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1834437045, now seen corresponding path program 1 times [2021-10-13 21:24:16,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:16,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948004989] [2021-10-13 21:24:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:16,854 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:16,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:16,855 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:16,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 21:24:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:17,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:24:17,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:17,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:17,284 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:17,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:24:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:24:17,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:18,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:18,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948004989] [2021-10-13 21:24:18,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948004989] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:18,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:18,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-13 21:24:18,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867910393] [2021-10-13 21:24:18,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:24:18,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:18,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:24:18,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:24:18,508 INFO L87 Difference]: Start difference. First operand 1110 states and 4821 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:20,245 INFO L93 Difference]: Finished difference Result 1653 states and 6786 transitions. [2021-10-13 21:24:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:24:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:24:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:20,260 INFO L225 Difference]: With dead ends: 1653 [2021-10-13 21:24:20,261 INFO L226 Difference]: Without dead ends: 1651 [2021-10-13 21:24:20,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 912.2ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:24:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-10-13 21:24:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1439. [2021-10-13 21:24:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1412 states have (on average 4.327195467422096) internal successors, (6110), 1438 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 6110 transitions. [2021-10-13 21:24:20,319 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 6110 transitions. Word has length 10 [2021-10-13 21:24:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:20,319 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 6110 transitions. [2021-10-13 21:24:20,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 6110 transitions. [2021-10-13 21:24:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:24:20,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:20,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:20,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-13 21:24:20,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:20,536 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:20,537 INFO L82 PathProgramCache]: Analyzing trace with hash 236583197, now seen corresponding path program 1 times [2021-10-13 21:24:20,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:20,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668661091] [2021-10-13 21:24:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:20,538 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:20,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:20,540 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:20,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 21:24:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:20,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:24:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:20,960 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:20,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:24:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:21,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:22,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:22,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668661091] [2021-10-13 21:24:22,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668661091] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:22,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:22,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:24:22,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775603607] [2021-10-13 21:24:22,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:24:22,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:24:22,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:24:22,041 INFO L87 Difference]: Start difference. First operand 1439 states and 6110 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:27,168 INFO L93 Difference]: Finished difference Result 3386 states and 14396 transitions. [2021-10-13 21:24:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 21:24:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:24:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:27,183 INFO L225 Difference]: With dead ends: 3386 [2021-10-13 21:24:27,184 INFO L226 Difference]: Without dead ends: 3386 [2021-10-13 21:24:27,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2406.8ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:24:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-10-13 21:24:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2038. [2021-10-13 21:24:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2011 states have (on average 4.545997016409746) internal successors, (9142), 2037 states have internal predecessors, (9142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 9142 transitions. [2021-10-13 21:24:27,268 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 9142 transitions. Word has length 10 [2021-10-13 21:24:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:27,269 INFO L470 AbstractCegarLoop]: Abstraction has 2038 states and 9142 transitions. [2021-10-13 21:24:27,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 9142 transitions. [2021-10-13 21:24:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:24:27,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:27,270 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:27,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:27,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:27,483 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:27,484 INFO L82 PathProgramCache]: Analyzing trace with hash 236583231, now seen corresponding path program 1 times [2021-10-13 21:24:27,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:27,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444637606] [2021-10-13 21:24:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:27,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:27,487 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:27,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 21:24:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:27,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:24:27,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:27,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:28,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:28,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444637606] [2021-10-13 21:24:28,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444637606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:28,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:28,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:24:28,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274299132] [2021-10-13 21:24:28,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:24:28,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:24:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:24:28,152 INFO L87 Difference]: Start difference. First operand 2038 states and 9142 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:28,895 INFO L93 Difference]: Finished difference Result 2012 states and 8706 transitions. [2021-10-13 21:24:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:24:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:24:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:28,907 INFO L225 Difference]: With dead ends: 2012 [2021-10-13 21:24:28,907 INFO L226 Difference]: Without dead ends: 2006 [2021-10-13 21:24:28,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:24:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-10-13 21:24:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1966. [2021-10-13 21:24:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1945 states have (on average 4.415938303341902) internal successors, (8589), 1965 states have internal predecessors, (8589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 8589 transitions. [2021-10-13 21:24:28,973 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 8589 transitions. Word has length 10 [2021-10-13 21:24:28,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:28,974 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 8589 transitions. [2021-10-13 21:24:28,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 8589 transitions. [2021-10-13 21:24:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:24:28,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:28,975 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:28,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:29,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:29,189 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash 229880861, now seen corresponding path program 1 times [2021-10-13 21:24:29,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:29,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439513575] [2021-10-13 21:24:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:29,190 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:29,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:29,192 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:29,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 21:24:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:29,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 21:24:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:24:29,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:29,557 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 11 treesize of output 9 [2021-10-13 21:24:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:24:29,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:29,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439513575] [2021-10-13 21:24:29,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439513575] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:29,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:29,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:24:29,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628557675] [2021-10-13 21:24:29,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:24:29,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:24:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:24:29,727 INFO L87 Difference]: Start difference. First operand 1966 states and 8589 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:30,790 INFO L93 Difference]: Finished difference Result 4858 states and 20195 transitions. [2021-10-13 21:24:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:24:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:24:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:30,817 INFO L225 Difference]: With dead ends: 4858 [2021-10-13 21:24:30,817 INFO L226 Difference]: Without dead ends: 4858 [2021-10-13 21:24:30,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:24:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-10-13 21:24:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 2176. [2021-10-13 21:24:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2155 states have (on average 4.558236658932715) internal successors, (9823), 2175 states have internal predecessors, (9823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 9823 transitions. [2021-10-13 21:24:30,966 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 9823 transitions. Word has length 10 [2021-10-13 21:24:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:30,967 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 9823 transitions. [2021-10-13 21:24:30,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 9823 transitions. [2021-10-13 21:24:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 21:24:30,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:30,968 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 21:24:30,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:31,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:31,184 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:31,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2116282346, now seen corresponding path program 2 times [2021-10-13 21:24:31,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:31,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320748247] [2021-10-13 21:24:31,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:24:31,187 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:31,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:31,188 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:31,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 21:24:31,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:24:31,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:24:31,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:31,695 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:31,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:24:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:32,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:33,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:33,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320748247] [2021-10-13 21:24:33,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320748247] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:33,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:33,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:24:33,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341473233] [2021-10-13 21:24:33,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:24:33,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:33,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:24:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:24:33,393 INFO L87 Difference]: Start difference. First operand 2176 states and 9823 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:38,072 INFO L93 Difference]: Finished difference Result 5573 states and 24098 transitions. [2021-10-13 21:24:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:24:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 21:24:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:38,101 INFO L225 Difference]: With dead ends: 5573 [2021-10-13 21:24:38,102 INFO L226 Difference]: Without dead ends: 5571 [2021-10-13 21:24:38,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2655.0ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-10-13 21:24:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2021-10-13 21:24:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 2865. [2021-10-13 21:24:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2838 states have (on average 4.638125440451022) internal successors, (13163), 2864 states have internal predecessors, (13163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13163 transitions. [2021-10-13 21:24:38,272 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13163 transitions. Word has length 11 [2021-10-13 21:24:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:38,272 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 13163 transitions. [2021-10-13 21:24:38,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13163 transitions. [2021-10-13 21:24:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 21:24:38,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:38,274 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:38,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:38,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:38,488 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash -45262070, now seen corresponding path program 2 times [2021-10-13 21:24:38,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:38,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756924888] [2021-10-13 21:24:38,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:24:38,491 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:38,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:38,492 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:38,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 21:24:38,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:24:38,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:38,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 21:24:38,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:38,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:39,023 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:39,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:24:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:24:39,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:24:41,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:41,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756924888] [2021-10-13 21:24:41,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756924888] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:24:41,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:24:41,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:24:41,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721333163] [2021-10-13 21:24:41,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:24:41,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:24:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:24:41,386 INFO L87 Difference]: Start difference. First operand 2865 states and 13163 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:42,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:42,080 INFO L93 Difference]: Finished difference Result 2261 states and 10073 transitions. [2021-10-13 21:24:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:24:42,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 21:24:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:42,091 INFO L225 Difference]: With dead ends: 2261 [2021-10-13 21:24:42,091 INFO L226 Difference]: Without dead ends: 2253 [2021-10-13 21:24:42,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:24:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-10-13 21:24:42,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1546. [2021-10-13 21:24:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1537 states have (on average 4.275862068965517) internal successors, (6572), 1545 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 6572 transitions. [2021-10-13 21:24:42,150 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 6572 transitions. Word has length 11 [2021-10-13 21:24:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:42,150 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 6572 transitions. [2021-10-13 21:24:42,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 6572 transitions. [2021-10-13 21:24:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 21:24:42,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:42,152 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:42,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:42,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:42,366 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:42,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1463624418, now seen corresponding path program 1 times [2021-10-13 21:24:42,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:42,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760814435] [2021-10-13 21:24:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:42,368 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:42,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:42,369 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:42,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 21:24:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:42,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:24:42,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:24:42,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:24:42,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:42,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760814435] [2021-10-13 21:24:42,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760814435] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:24:42,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:24:42,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 21:24:42,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242014792] [2021-10-13 21:24:42,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:24:42,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:24:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:24:42,662 INFO L87 Difference]: Start difference. First operand 1546 states and 6572 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:42,744 INFO L93 Difference]: Finished difference Result 1536 states and 6082 transitions. [2021-10-13 21:24:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:24:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 21:24:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:42,752 INFO L225 Difference]: With dead ends: 1536 [2021-10-13 21:24:42,752 INFO L226 Difference]: Without dead ends: 1522 [2021-10-13 21:24:42,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:24:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-10-13 21:24:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1374. [2021-10-13 21:24:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1368 states have (on average 4.095029239766082) internal successors, (5602), 1373 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 5602 transitions. [2021-10-13 21:24:42,820 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 5602 transitions. Word has length 11 [2021-10-13 21:24:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:42,820 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 5602 transitions. [2021-10-13 21:24:42,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 5602 transitions. [2021-10-13 21:24:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:24:42,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:42,822 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 21:24:42,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:43,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:24:43,035 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:24:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2031415211, now seen corresponding path program 3 times [2021-10-13 21:24:43,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:43,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759283332] [2021-10-13 21:24:43,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:24:43,039 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:43,040 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:24:43,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 21:24:43,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 21:24:43,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:43,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 21:24:43,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:43,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:43,655 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:43,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:24:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:44,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:46,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:46,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759283332] [2021-10-13 21:24:46,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759283332] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:46,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:46,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-13 21:24:46,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656215742] [2021-10-13 21:24:46,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:24:46,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:46,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:24:46,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:24:46,205 INFO L87 Difference]: Start difference. First operand 1374 states and 5602 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:25:00,756 INFO L93 Difference]: Finished difference Result 3098 states and 12649 transitions. [2021-10-13 21:25:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:25:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:25:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:25:00,770 INFO L225 Difference]: With dead ends: 3098 [2021-10-13 21:25:00,770 INFO L226 Difference]: Without dead ends: 3098 [2021-10-13 21:25:00,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 6009.9ms TimeCoverageRelationStatistics Valid=307, Invalid=1025, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 21:25:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-10-13 21:25:00,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 1966. [2021-10-13 21:25:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1960 states have (on average 4.256122448979592) internal successors, (8342), 1965 states have internal predecessors, (8342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 8342 transitions. [2021-10-13 21:25:00,838 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 8342 transitions. Word has length 12 [2021-10-13 21:25:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:25:00,838 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 8342 transitions. [2021-10-13 21:25:00,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 8342 transitions. [2021-10-13 21:25:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:25:00,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:25:00,840 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:25:00,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 21:25:01,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:25:01,055 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:25:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:25:01,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1872197005, now seen corresponding path program 1 times [2021-10-13 21:25:01,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:25:01,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883116218] [2021-10-13 21:25:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:25:01,058 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:25:01,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:25:01,059 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:25:01,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 21:25:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:25:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:25:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:25:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:25:01,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:25:01,558 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:25:01,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:25:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:25:01,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:25:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:25:02,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:25:02,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883116218] [2021-10-13 21:25:02,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883116218] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:25:02,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:25:02,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-13 21:25:02,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095916664] [2021-10-13 21:25:02,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:25:02,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:25:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:25:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:25:02,810 INFO L87 Difference]: Start difference. First operand 1966 states and 8342 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:25:04,461 INFO L93 Difference]: Finished difference Result 1838 states and 7747 transitions. [2021-10-13 21:25:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:25:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:25:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:25:04,470 INFO L225 Difference]: With dead ends: 1838 [2021-10-13 21:25:04,470 INFO L226 Difference]: Without dead ends: 1782 [2021-10-13 21:25:04,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 923.0ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:25:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-13 21:25:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1774. [2021-10-13 21:25:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1768 states have (on average 4.290723981900452) internal successors, (7586), 1773 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 7586 transitions. [2021-10-13 21:25:04,526 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 7586 transitions. Word has length 12 [2021-10-13 21:25:04,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:25:04,526 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 7586 transitions. [2021-10-13 21:25:04,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 7586 transitions. [2021-10-13 21:25:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:25:04,530 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:25:04,531 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:25:04,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 21:25:04,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:25:04,746 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:25:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:25:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1601802392, now seen corresponding path program 2 times [2021-10-13 21:25:04,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:25:04,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694405524] [2021-10-13 21:25:04,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:25:04,748 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:25:04,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:25:04,749 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:25:04,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 21:25:05,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:25:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:25:05,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:25:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:25:05,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:25:05,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:25:05,410 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:25:05,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:25:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:25:05,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:25:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:25:07,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:25:07,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694405524] [2021-10-13 21:25:07,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694405524] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:25:07,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:25:07,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:25:07,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427631423] [2021-10-13 21:25:07,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:25:07,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:25:07,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:25:07,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:25:07,615 INFO L87 Difference]: Start difference. First operand 1774 states and 7586 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:12,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:25:12,429 INFO L93 Difference]: Finished difference Result 2376 states and 9359 transitions. [2021-10-13 21:25:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:25:12,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 21:25:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:25:12,440 INFO L225 Difference]: With dead ends: 2376 [2021-10-13 21:25:12,440 INFO L226 Difference]: Without dead ends: 2280 [2021-10-13 21:25:12,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 3174.6ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-10-13 21:25:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-10-13 21:25:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1632. [2021-10-13 21:25:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1627 states have (on average 4.238475722188076) internal successors, (6896), 1631 states have internal predecessors, (6896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 6896 transitions. [2021-10-13 21:25:12,478 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 6896 transitions. Word has length 13 [2021-10-13 21:25:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:25:12,478 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 6896 transitions. [2021-10-13 21:25:12,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 6896 transitions. [2021-10-13 21:25:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 21:25:12,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:25:12,480 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:25:12,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 21:25:12,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:25:12,681 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:25:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:25:12,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1809503981, now seen corresponding path program 3 times [2021-10-13 21:25:12,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:25:12,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084226272] [2021-10-13 21:25:12,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:25:12,683 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:25:12,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:25:12,685 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:25:12,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 21:25:13,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 21:25:13,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:25:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:25:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:25:13,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:25:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:25:13,347 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:25:13,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:25:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:25:13,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:25:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:25:14,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:25:14,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084226272] [2021-10-13 21:25:14,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084226272] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:25:14,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:25:14,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 21:25:14,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974531163] [2021-10-13 21:25:14,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:25:14,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:25:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:25:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:25:14,800 INFO L87 Difference]: Start difference. First operand 1632 states and 6896 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:25:18,049 INFO L93 Difference]: Finished difference Result 4490 states and 19114 transitions. [2021-10-13 21:25:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 21:25:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 21:25:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:25:18,073 INFO L225 Difference]: With dead ends: 4490 [2021-10-13 21:25:18,074 INFO L226 Difference]: Without dead ends: 4490 [2021-10-13 21:25:18,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1612.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-10-13 21:25:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4490 states. [2021-10-13 21:25:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4490 to 2768. [2021-10-13 21:25:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2763 states have (on average 4.542888165038002) internal successors, (12552), 2767 states have internal predecessors, (12552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 12552 transitions. [2021-10-13 21:25:18,182 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 12552 transitions. Word has length 14 [2021-10-13 21:25:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:25:18,183 INFO L470 AbstractCegarLoop]: Abstraction has 2768 states and 12552 transitions. [2021-10-13 21:25:18,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 12552 transitions. [2021-10-13 21:25:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:25:18,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:25:18,188 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-13 21:25:18,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 21:25:18,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:25:18,402 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:25:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:25:18,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1814157791, now seen corresponding path program 3 times [2021-10-13 21:25:18,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:25:18,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955557305] [2021-10-13 21:25:18,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:25:18,404 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:25:18,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:25:18,405 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:25:18,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-13 21:25:18,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 21:25:18,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:25:18,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 21:25:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:25:18,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:25:18,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:25:19,187 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:25:19,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:25:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:25:20,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:25:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:25:27,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:25:27,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955557305] [2021-10-13 21:25:27,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955557305] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:25:27,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:25:27,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 21:25:27,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364365753] [2021-10-13 21:25:27,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 21:25:27,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:25:27,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 21:25:27,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 21:25:27,264 INFO L87 Difference]: Start difference. First operand 2768 states and 12552 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:40,618 WARN L207 SmtUtils]: Spent 9.63 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 21:25:49,910 WARN L207 SmtUtils]: Spent 8.28 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 21:25:57,381 WARN L207 SmtUtils]: Spent 6.53 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-13 21:26:03,986 WARN L207 SmtUtils]: Spent 5.31 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-13 21:26:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:26:39,033 INFO L93 Difference]: Finished difference Result 66726 states and 313205 transitions. [2021-10-13 21:26:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 21:26:39,036 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 21:26:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:26:40,147 INFO L225 Difference]: With dead ends: 66726 [2021-10-13 21:26:40,148 INFO L226 Difference]: Without dead ends: 66726 [2021-10-13 21:26:40,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 60112.4ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 21:26:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66726 states. [2021-10-13 21:26:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66726 to 2784. [2021-10-13 21:26:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2779 states have (on average 4.5282475710687295) internal successors, (12584), 2783 states have internal predecessors, (12584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:26:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 12584 transitions. [2021-10-13 21:26:41,678 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 12584 transitions. Word has length 16 [2021-10-13 21:26:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:26:41,679 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 12584 transitions. [2021-10-13 21:26:41,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:26:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 12584 transitions. [2021-10-13 21:26:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 21:26:41,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:26:41,687 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1] [2021-10-13 21:26:41,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-13 21:26:41,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:26:41,900 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:26:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:26:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash -274445637, now seen corresponding path program 4 times [2021-10-13 21:26:41,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:26:41,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477595676] [2021-10-13 21:26:41,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:26:41,903 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:26:41,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:26:41,904 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:26:41,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 21:26:42,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:26:42,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:26:42,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:26:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:26:42,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:26:42,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:26:42,714 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:26:42,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:26:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 21:26:43,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:26:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:26:46,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:26:46,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477595676] [2021-10-13 21:26:46,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477595676] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:26:46,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:26:46,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 21 [2021-10-13 21:26:46,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50410331] [2021-10-13 21:26:46,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 21:26:46,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:26:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 21:26:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:26:46,214 INFO L87 Difference]: Start difference. First operand 2784 states and 12584 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:26:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:26:55,806 INFO L93 Difference]: Finished difference Result 6431 states and 26890 transitions. [2021-10-13 21:26:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:26:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 21:26:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:26:55,836 INFO L225 Difference]: With dead ends: 6431 [2021-10-13 21:26:55,836 INFO L226 Difference]: Without dead ends: 6415 [2021-10-13 21:26:55,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 7024.1ms TimeCoverageRelationStatistics Valid=275, Invalid=1207, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 21:26:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6415 states. [2021-10-13 21:26:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6415 to 3703. [2021-10-13 21:26:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3697 states have (on average 4.476061671625643) internal successors, (16548), 3702 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:26:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 16548 transitions. [2021-10-13 21:26:55,988 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 16548 transitions. Word has length 20 [2021-10-13 21:26:55,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:26:55,988 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 16548 transitions. [2021-10-13 21:26:55,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:26:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 16548 transitions. [2021-10-13 21:26:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:26:55,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:26:55,995 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1] [2021-10-13 21:26:56,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 21:26:56,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:26:56,211 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:26:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:26:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1949051590, now seen corresponding path program 5 times [2021-10-13 21:26:56,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:26:56,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966780402] [2021-10-13 21:26:56,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:26:56,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:26:56,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:26:56,215 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:26:56,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 21:26:56,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-13 21:26:56,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:26:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 21:26:56,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:26:56,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:26:56,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:26:57,016 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:26:57,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:26:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:26:57,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:27:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:27:01,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:27:01,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966780402] [2021-10-13 21:27:01,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966780402] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:27:01,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:27:01,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-13 21:27:01,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36403151] [2021-10-13 21:27:01,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 21:27:01,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:27:01,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 21:27:01,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-10-13 21:27:01,922 INFO L87 Difference]: Start difference. First operand 3703 states and 16548 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:14,494 WARN L207 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2021-10-13 21:28:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:28:23,248 INFO L93 Difference]: Finished difference Result 20185 states and 87770 transitions. [2021-10-13 21:28:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-13 21:28:23,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 21:28:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:28:23,349 INFO L225 Difference]: With dead ends: 20185 [2021-10-13 21:28:23,349 INFO L226 Difference]: Without dead ends: 20169 [2021-10-13 21:28:23,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 47290.3ms TimeCoverageRelationStatistics Valid=912, Invalid=3780, Unknown=0, NotChecked=0, Total=4692 [2021-10-13 21:28:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20169 states. [2021-10-13 21:28:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20169 to 5361. [2021-10-13 21:28:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5361 states, 5355 states have (on average 4.51577964519141) internal successors, (24182), 5360 states have internal predecessors, (24182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5361 states to 5361 states and 24182 transitions. [2021-10-13 21:28:23,762 INFO L78 Accepts]: Start accepts. Automaton has 5361 states and 24182 transitions. Word has length 21 [2021-10-13 21:28:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:28:23,762 INFO L470 AbstractCegarLoop]: Abstraction has 5361 states and 24182 transitions. [2021-10-13 21:28:23,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5361 states and 24182 transitions. [2021-10-13 21:28:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:28:23,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:28:23,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:28:23,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 21:28:23,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:28:23,987 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:28:23,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:28:23,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1397090728, now seen corresponding path program 1 times [2021-10-13 21:28:23,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:28:23,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176287976] [2021-10-13 21:28:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:28:23,989 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:28:23,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:28:23,991 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:28:23,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-13 21:28:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:28:24,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:28:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:28:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:28:24,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:28:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:28:25,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:28:25,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176287976] [2021-10-13 21:28:25,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176287976] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:28:25,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:28:25,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 21:28:25,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416739360] [2021-10-13 21:28:25,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:28:25,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:28:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:28:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:28:25,084 INFO L87 Difference]: Start difference. First operand 5361 states and 24182 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:28:25,256 INFO L93 Difference]: Finished difference Result 5726 states and 25340 transitions. [2021-10-13 21:28:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:28:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 21:28:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:28:25,276 INFO L225 Difference]: With dead ends: 5726 [2021-10-13 21:28:25,276 INFO L226 Difference]: Without dead ends: 5622 [2021-10-13 21:28:25,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:28:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5622 states. [2021-10-13 21:28:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5622 to 5340. [2021-10-13 21:28:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5340 states, 5334 states have (on average 4.531683539557555) internal successors, (24172), 5339 states have internal predecessors, (24172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5340 states to 5340 states and 24172 transitions. [2021-10-13 21:28:25,487 INFO L78 Accepts]: Start accepts. Automaton has 5340 states and 24172 transitions. Word has length 21 [2021-10-13 21:28:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:28:25,487 INFO L470 AbstractCegarLoop]: Abstraction has 5340 states and 24172 transitions. [2021-10-13 21:28:25,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5340 states and 24172 transitions. [2021-10-13 21:28:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:28:25,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:28:25,498 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:28:25,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-13 21:28:25,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:28:25,713 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:28:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:28:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1620857735, now seen corresponding path program 4 times [2021-10-13 21:28:25,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:28:25,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98246112] [2021-10-13 21:28:25,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:28:25,717 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:28:25,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:28:25,718 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:28:25,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 21:28:26,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:28:26,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:28:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:28:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:28:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:28:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:28:26,429 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:28:26,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:28:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 21:28:26,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:28:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:28:30,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:28:30,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98246112] [2021-10-13 21:28:30,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98246112] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:28:30,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:28:30,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 21 [2021-10-13 21:28:30,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937886559] [2021-10-13 21:28:30,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 21:28:30,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:28:30,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 21:28:30,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:28:30,134 INFO L87 Difference]: Start difference. First operand 5340 states and 24172 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:28:39,117 INFO L93 Difference]: Finished difference Result 6766 states and 28570 transitions. [2021-10-13 21:28:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 21:28:39,121 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 21:28:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:28:39,146 INFO L225 Difference]: With dead ends: 6766 [2021-10-13 21:28:39,147 INFO L226 Difference]: Without dead ends: 6638 [2021-10-13 21:28:39,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 6752.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 21:28:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6638 states. [2021-10-13 21:28:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6638 to 5146. [2021-10-13 21:28:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5146 states, 5140 states have (on average 4.511673151750973) internal successors, (23190), 5145 states have internal predecessors, (23190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 23190 transitions. [2021-10-13 21:28:39,289 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 23190 transitions. Word has length 22 [2021-10-13 21:28:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:28:39,289 INFO L470 AbstractCegarLoop]: Abstraction has 5146 states and 23190 transitions. [2021-10-13 21:28:39,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 23190 transitions. [2021-10-13 21:28:39,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 21:28:39,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:28:39,297 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2021-10-13 21:28:39,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 21:28:39,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:28:39,498 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:28:39,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:28:39,499 INFO L82 PathProgramCache]: Analyzing trace with hash 45110630, now seen corresponding path program 6 times [2021-10-13 21:28:39,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:28:39,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292409963] [2021-10-13 21:28:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:28:39,500 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:28:39,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:28:39,501 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:28:39,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 21:28:40,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-13 21:28:40,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:28:40,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 21:28:40,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:28:40,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:28:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:28:40,550 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:28:40,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:28:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 21:28:41,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:28:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 21:28:44,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:28:44,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292409963] [2021-10-13 21:28:44,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292409963] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:28:44,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:28:44,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-10-13 21:28:44,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759964366] [2021-10-13 21:28:44,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 21:28:44,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:28:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 21:28:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:28:44,429 INFO L87 Difference]: Start difference. First operand 5146 states and 23190 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:29:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:29:12,381 INFO L93 Difference]: Finished difference Result 15050 states and 65927 transitions. [2021-10-13 21:29:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 21:29:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 21:29:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:29:12,441 INFO L225 Difference]: With dead ends: 15050 [2021-10-13 21:29:12,442 INFO L226 Difference]: Without dead ends: 15050 [2021-10-13 21:29:12,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 18835.4ms TimeCoverageRelationStatistics Valid=598, Invalid=1382, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 21:29:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15050 states. [2021-10-13 21:29:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15050 to 6525. [2021-10-13 21:29:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6519 states have (on average 4.70210154931738) internal successors, (30653), 6524 states have internal predecessors, (30653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:29:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 30653 transitions. [2021-10-13 21:29:12,678 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 30653 transitions. Word has length 23 [2021-10-13 21:29:12,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:29:12,678 INFO L470 AbstractCegarLoop]: Abstraction has 6525 states and 30653 transitions. [2021-10-13 21:29:12,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:29:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 30653 transitions. [2021-10-13 21:29:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 21:29:12,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:29:12,686 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:29:12,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-13 21:29:12,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:29:12,886 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:29:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:29:12,887 INFO L82 PathProgramCache]: Analyzing trace with hash 561231300, now seen corresponding path program 5 times [2021-10-13 21:29:12,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:29:12,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225289757] [2021-10-13 21:29:12,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:29:12,889 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:29:12,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:29:12,890 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:29:12,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-13 21:29:13,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-13 21:29:13,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:29:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 21:29:13,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:29:13,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:29:13,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:29:13,933 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:29:13,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:29:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:29:14,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:29:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:29:18,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:29:18,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225289757] [2021-10-13 21:29:18,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225289757] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:29:18,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:29:18,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-13 21:29:18,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282503371] [2021-10-13 21:29:18,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 21:29:18,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:29:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 21:29:18,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-10-13 21:29:18,601 INFO L87 Difference]: Start difference. First operand 6525 states and 30653 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:38,992 INFO L93 Difference]: Finished difference Result 26810 states and 122333 transitions. [2021-10-13 21:30:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 21:30:38,997 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 21:30:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:39,119 INFO L225 Difference]: With dead ends: 26810 [2021-10-13 21:30:39,119 INFO L226 Difference]: Without dead ends: 26650 [2021-10-13 21:30:39,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 46156.5ms TimeCoverageRelationStatistics Valid=877, Invalid=3545, Unknown=0, NotChecked=0, Total=4422 [2021-10-13 21:30:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26650 states. [2021-10-13 21:30:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26650 to 7048. [2021-10-13 21:30:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7048 states, 7043 states have (on average 4.716598040607695) internal successors, (33219), 7047 states have internal predecessors, (33219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 33219 transitions. [2021-10-13 21:30:39,639 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 33219 transitions. Word has length 23 [2021-10-13 21:30:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:39,639 INFO L470 AbstractCegarLoop]: Abstraction has 7048 states and 33219 transitions. [2021-10-13 21:30:39,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 33219 transitions. [2021-10-13 21:30:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 21:30:39,646 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:39,646 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:30:39,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-13 21:30:39,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:30:39,847 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:30:39,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:39,850 INFO L82 PathProgramCache]: Analyzing trace with hash -764329243, now seen corresponding path program 1 times [2021-10-13 21:30:39,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:39,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453035285] [2021-10-13 21:30:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:39,851 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:39,853 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:30:39,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 21:30:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:40,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:30:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:30:40,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:30:40,613 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:30:40,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:30:41,190 INFO L354 Elim1Store]: treesize reduction 497, result has 0.2 percent of original size [2021-10-13 21:30:41,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 265 treesize of output 123 [2021-10-13 21:30:41,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 21:30:41,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 76 [2021-10-13 21:30:41,226 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 75 treesize of output 73 [2021-10-13 21:30:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:30:41,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:41,947 INFO L354 Elim1Store]: treesize reduction 497, result has 0.2 percent of original size [2021-10-13 21:30:41,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 243 treesize of output 101 [2021-10-13 21:30:41,963 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 50 treesize of output 48 [2021-10-13 21:30:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:30:43,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:43,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453035285] [2021-10-13 21:30:43,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453035285] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:30:43,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:30:43,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2021-10-13 21:30:43,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864272479] [2021-10-13 21:30:43,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:30:43,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:43,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:30:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:30:43,630 INFO L87 Difference]: Start difference. First operand 7048 states and 33219 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:56,426 INFO L93 Difference]: Finished difference Result 12686 states and 59781 transitions. [2021-10-13 21:30:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:30:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 21:30:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:56,476 INFO L225 Difference]: With dead ends: 12686 [2021-10-13 21:30:56,476 INFO L226 Difference]: Without dead ends: 12686 [2021-10-13 21:30:56,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2214.0ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:30:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12686 states. [2021-10-13 21:30:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12686 to 7078. [2021-10-13 21:30:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7073 states have (on average 4.715962109430228) internal successors, (33356), 7077 states have internal predecessors, (33356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 33356 transitions. [2021-10-13 21:30:56,695 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 33356 transitions. Word has length 23 [2021-10-13 21:30:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:56,695 INFO L470 AbstractCegarLoop]: Abstraction has 7078 states and 33356 transitions. [2021-10-13 21:30:56,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 33356 transitions. [2021-10-13 21:30:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 21:30:56,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:56,702 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:30:56,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-10-13 21:30:56,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:30:56,903 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:30:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:56,904 INFO L82 PathProgramCache]: Analyzing trace with hash -352533127, now seen corresponding path program 2 times [2021-10-13 21:30:56,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:56,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816466278] [2021-10-13 21:30:56,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:30:56,906 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:56,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:56,909 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:30:56,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-13 21:30:57,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:30:57,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:30:57,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:30:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:30:57,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:30:58,275 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:58,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816466278] [2021-10-13 21:30:58,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816466278] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:30:58,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:30:58,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 21:30:58,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190212729] [2021-10-13 21:30:58,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 21:30:58,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 21:30:58,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:30:58,277 INFO L87 Difference]: Start difference. First operand 7078 states and 33356 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:58,744 INFO L93 Difference]: Finished difference Result 7058 states and 33259 transitions. [2021-10-13 21:30:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 21:30:58,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 21:30:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:58,771 INFO L225 Difference]: With dead ends: 7058 [2021-10-13 21:30:58,771 INFO L226 Difference]: Without dead ends: 7058 [2021-10-13 21:30:58,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:30:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7058 states. [2021-10-13 21:30:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7058 to 6972. [2021-10-13 21:30:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6972 states, 6967 states have (on average 4.729582316635567) internal successors, (32951), 6971 states have internal predecessors, (32951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 32951 transitions. [2021-10-13 21:30:59,049 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 32951 transitions. Word has length 23 [2021-10-13 21:30:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:59,050 INFO L470 AbstractCegarLoop]: Abstraction has 6972 states and 32951 transitions. [2021-10-13 21:30:59,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 32951 transitions. [2021-10-13 21:30:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:30:59,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:59,057 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:30:59,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-13 21:30:59,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:30:59,258 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:30:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:59,260 INFO L82 PathProgramCache]: Analyzing trace with hash 669320953, now seen corresponding path program 1 times [2021-10-13 21:30:59,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:59,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162111749] [2021-10-13 21:30:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:59,261 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:59,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:59,262 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:30:59,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-13 21:30:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:59,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:30:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:30:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:00,247 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:31:00,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:31:00,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:31:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:01,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:02,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:02,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162111749] [2021-10-13 21:31:02,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162111749] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:02,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:02,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:31:02,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478459528] [2021-10-13 21:31:02,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:31:02,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:02,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:31:02,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:31:02,408 INFO L87 Difference]: Start difference. First operand 6972 states and 32951 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:08,616 INFO L93 Difference]: Finished difference Result 8726 states and 40794 transitions. [2021-10-13 21:31:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 21:31:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:31:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:08,651 INFO L225 Difference]: With dead ends: 8726 [2021-10-13 21:31:08,651 INFO L226 Difference]: Without dead ends: 8726 [2021-10-13 21:31:08,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4592.2ms TimeCoverageRelationStatistics Valid=429, Invalid=1131, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 21:31:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2021-10-13 21:31:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 7038. [2021-10-13 21:31:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7038 states, 7033 states have (on average 4.712498222664581) internal successors, (33143), 7037 states have internal predecessors, (33143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7038 states to 7038 states and 33143 transitions. [2021-10-13 21:31:08,841 INFO L78 Accepts]: Start accepts. Automaton has 7038 states and 33143 transitions. Word has length 24 [2021-10-13 21:31:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:08,842 INFO L470 AbstractCegarLoop]: Abstraction has 7038 states and 33143 transitions. [2021-10-13 21:31:08,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 7038 states and 33143 transitions. [2021-10-13 21:31:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:31:08,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:08,849 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:08,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-10-13 21:31:09,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:09,050 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:31:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:09,051 INFO L82 PathProgramCache]: Analyzing trace with hash 882920577, now seen corresponding path program 2 times [2021-10-13 21:31:09,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:09,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170960518] [2021-10-13 21:31:09,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:09,052 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:09,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:09,053 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:09,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 21:31:09,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:09,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:09,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:31:09,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:09,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:09,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:10,137 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:31:10,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:31:10,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:31:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:11,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:12,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:12,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170960518] [2021-10-13 21:31:12,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170960518] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:12,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:12,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:31:12,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503880879] [2021-10-13 21:31:12,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:31:12,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:12,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:31:12,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:31:12,272 INFO L87 Difference]: Start difference. First operand 7038 states and 33143 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:18,410 INFO L93 Difference]: Finished difference Result 8876 states and 41309 transitions. [2021-10-13 21:31:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 21:31:18,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:31:18,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:18,441 INFO L225 Difference]: With dead ends: 8876 [2021-10-13 21:31:18,442 INFO L226 Difference]: Without dead ends: 8876 [2021-10-13 21:31:18,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 4450.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 21:31:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8876 states. [2021-10-13 21:31:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8876 to 7052. [2021-10-13 21:31:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7047 states have (on average 4.709663686675181) internal successors, (33189), 7051 states have internal predecessors, (33189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 33189 transitions. [2021-10-13 21:31:18,634 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 33189 transitions. Word has length 24 [2021-10-13 21:31:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:18,635 INFO L470 AbstractCegarLoop]: Abstraction has 7052 states and 33189 transitions. [2021-10-13 21:31:18,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 33189 transitions. [2021-10-13 21:31:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:31:18,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:18,642 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:18,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:18,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:18,843 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:31:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash -190164803, now seen corresponding path program 3 times [2021-10-13 21:31:18,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:18,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794965569] [2021-10-13 21:31:18,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:31:18,845 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:18,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:18,846 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:18,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-13 21:31:19,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:31:19,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:31:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:19,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:19,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:19,948 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:31:19,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:31:20,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:31:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:21,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:22,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:22,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794965569] [2021-10-13 21:31:22,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794965569] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:22,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:22,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:31:22,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052995445] [2021-10-13 21:31:22,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:31:22,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:22,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:31:22,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:31:22,284 INFO L87 Difference]: Start difference. First operand 7052 states and 33189 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:28,190 INFO L93 Difference]: Finished difference Result 8796 states and 41046 transitions. [2021-10-13 21:31:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 21:31:28,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:31:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:28,223 INFO L225 Difference]: With dead ends: 8796 [2021-10-13 21:31:28,223 INFO L226 Difference]: Without dead ends: 8796 [2021-10-13 21:31:28,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 4318.4ms TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 21:31:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8796 states. [2021-10-13 21:31:28,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8796 to 7058. [2021-10-13 21:31:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7058 states, 7053 states have (on average 4.7082092726499365) internal successors, (33207), 7057 states have internal predecessors, (33207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7058 states to 7058 states and 33207 transitions. [2021-10-13 21:31:28,421 INFO L78 Accepts]: Start accepts. Automaton has 7058 states and 33207 transitions. Word has length 24 [2021-10-13 21:31:28,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:28,421 INFO L470 AbstractCegarLoop]: Abstraction has 7058 states and 33207 transitions. [2021-10-13 21:31:28,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7058 states and 33207 transitions. [2021-10-13 21:31:28,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:31:28,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:28,428 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:28,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-10-13 21:31:28,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:28,629 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:31:28,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash -466190257, now seen corresponding path program 4 times [2021-10-13 21:31:28,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:28,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189209961] [2021-10-13 21:31:28,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:31:28,631 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:28,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:28,632 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:28,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-13 21:31:29,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:31:29,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:31:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:29,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:29,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:29,756 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:31:29,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:31:29,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:31:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:31,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:32,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:32,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189209961] [2021-10-13 21:31:32,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189209961] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:32,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:32,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:31:32,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846009481] [2021-10-13 21:31:32,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:31:32,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:31:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:31:32,340 INFO L87 Difference]: Start difference. First operand 7058 states and 33207 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:38,915 INFO L93 Difference]: Finished difference Result 9810 states and 45518 transitions. [2021-10-13 21:31:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 21:31:38,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:31:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:38,951 INFO L225 Difference]: With dead ends: 9810 [2021-10-13 21:31:38,952 INFO L226 Difference]: Without dead ends: 9810 [2021-10-13 21:31:38,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4905.0ms TimeCoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 21:31:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-10-13 21:31:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 7074. [2021-10-13 21:31:39,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 7069 states have (on average 4.707172160135804) internal successors, (33275), 7073 states have internal predecessors, (33275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 33275 transitions. [2021-10-13 21:31:39,149 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 33275 transitions. Word has length 24 [2021-10-13 21:31:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:39,149 INFO L470 AbstractCegarLoop]: Abstraction has 7074 states and 33275 transitions. [2021-10-13 21:31:39,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 33275 transitions. [2021-10-13 21:31:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:31:39,159 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:39,159 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:39,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:39,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:39,360 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:31:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1539275637, now seen corresponding path program 5 times [2021-10-13 21:31:39,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:39,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752605242] [2021-10-13 21:31:39,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:31:39,362 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:39,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:39,365 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:39,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 21:31:40,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:40,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:31:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:40,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:40,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:40,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752605242] [2021-10-13 21:31:40,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752605242] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:31:40,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:31:40,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-10-13 21:31:40,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615511835] [2021-10-13 21:31:40,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 21:31:40,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 21:31:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:31:40,744 INFO L87 Difference]: Start difference. First operand 7074 states and 33275 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2021-10-13 21:31:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:44,436 INFO L93 Difference]: Finished difference Result 9942 states and 45594 transitions. [2021-10-13 21:31:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 21:31:44,438 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 24 [2021-10-13 21:31:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:44,474 INFO L225 Difference]: With dead ends: 9942 [2021-10-13 21:31:44,474 INFO L226 Difference]: Without dead ends: 9942 [2021-10-13 21:31:44,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1505.8ms TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2021-10-13 21:31:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9942 states. [2021-10-13 21:31:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9942 to 7714. [2021-10-13 21:31:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7714 states, 7709 states have (on average 4.717862238941497) internal successors, (36370), 7713 states have internal predecessors, (36370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7714 states to 7714 states and 36370 transitions. [2021-10-13 21:31:44,810 INFO L78 Accepts]: Start accepts. Automaton has 7714 states and 36370 transitions. Word has length 24 [2021-10-13 21:31:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:44,810 INFO L470 AbstractCegarLoop]: Abstraction has 7714 states and 36370 transitions. [2021-10-13 21:31:44,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2021-10-13 21:31:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 7714 states and 36370 transitions. [2021-10-13 21:31:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:31:44,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:44,820 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:44,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:45,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:45,021 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:31:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1749536185, now seen corresponding path program 6 times [2021-10-13 21:31:45,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:45,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656906085] [2021-10-13 21:31:45,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:31:45,022 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:45,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:45,023 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:45,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-13 21:31:45,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 21:31:45,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:45,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:31:45,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:45,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:45,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:46,180 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:31:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:31:46,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:31:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:47,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:48,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:48,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656906085] [2021-10-13 21:31:48,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656906085] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:48,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:48,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:31:48,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485684708] [2021-10-13 21:31:48,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:31:48,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:48,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:31:48,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:31:48,473 INFO L87 Difference]: Start difference. First operand 7714 states and 36370 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:54,637 INFO L93 Difference]: Finished difference Result 9266 states and 43280 transitions. [2021-10-13 21:31:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 21:31:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:31:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:54,672 INFO L225 Difference]: With dead ends: 9266 [2021-10-13 21:31:54,672 INFO L226 Difference]: Without dead ends: 9266 [2021-10-13 21:31:54,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 4073.9ms TimeCoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:31:54,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9266 states. [2021-10-13 21:31:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9266 to 7726. [2021-10-13 21:31:54,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7721 states have (on average 4.713379095972025) internal successors, (36392), 7725 states have internal predecessors, (36392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 36392 transitions. [2021-10-13 21:31:54,891 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 36392 transitions. Word has length 24 [2021-10-13 21:31:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:54,891 INFO L470 AbstractCegarLoop]: Abstraction has 7726 states and 36392 transitions. [2021-10-13 21:31:54,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 36392 transitions. [2021-10-13 21:31:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:31:54,900 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:54,900 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:31:54,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:55,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:55,101 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:31:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1661824875, now seen corresponding path program 7 times [2021-10-13 21:31:55,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:55,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463411203] [2021-10-13 21:31:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:31:55,103 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:55,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:55,105 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:55,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-13 21:31:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:55,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:31:55,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:31:56,337 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:31:56,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:31:56,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:31:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:57,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:31:58,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:58,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463411203] [2021-10-13 21:31:58,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463411203] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:58,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:58,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:31:58,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984577355] [2021-10-13 21:31:58,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:31:58,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:58,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:31:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:31:58,655 INFO L87 Difference]: Start difference. First operand 7726 states and 36392 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:06,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:06,455 INFO L93 Difference]: Finished difference Result 9874 states and 45707 transitions. [2021-10-13 21:32:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 21:32:06,457 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:32:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:06,495 INFO L225 Difference]: With dead ends: 9874 [2021-10-13 21:32:06,495 INFO L226 Difference]: Without dead ends: 9874 [2021-10-13 21:32:06,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 5058.3ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 21:32:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-10-13 21:32:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 7736. [2021-10-13 21:32:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7736 states, 7731 states have (on average 4.7127150433320395) internal successors, (36434), 7735 states have internal predecessors, (36434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7736 states to 7736 states and 36434 transitions. [2021-10-13 21:32:06,783 INFO L78 Accepts]: Start accepts. Automaton has 7736 states and 36434 transitions. Word has length 24 [2021-10-13 21:32:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:06,784 INFO L470 AbstractCegarLoop]: Abstraction has 7736 states and 36434 transitions. [2021-10-13 21:32:06,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 7736 states and 36434 transitions. [2021-10-13 21:32:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:32:06,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:06,797 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:06,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:07,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:07,012 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:32:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:07,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1448225251, now seen corresponding path program 8 times [2021-10-13 21:32:07,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:07,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449797711] [2021-10-13 21:32:07,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:32:07,013 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:07,015 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:07,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-13 21:32:07,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:32:07,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:07,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:32:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:07,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:07,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:08,364 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:32:08,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:32:08,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:32:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:32:09,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:10,717 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:10,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449797711] [2021-10-13 21:32:10,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449797711] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:10,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:10,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:32:10,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849323312] [2021-10-13 21:32:10,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:32:10,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:10,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:32:10,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:32:10,719 INFO L87 Difference]: Start difference. First operand 7736 states and 36434 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:17,938 INFO L93 Difference]: Finished difference Result 9884 states and 45732 transitions. [2021-10-13 21:32:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 21:32:17,941 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:32:17,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:17,977 INFO L225 Difference]: With dead ends: 9884 [2021-10-13 21:32:17,977 INFO L226 Difference]: Without dead ends: 9884 [2021-10-13 21:32:17,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 4779.3ms TimeCoverageRelationStatistics Valid=304, Invalid=818, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:32:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9884 states. [2021-10-13 21:32:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9884 to 7742. [2021-10-13 21:32:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7742 states, 7737 states have (on average 4.7129378312007235) internal successors, (36464), 7741 states have internal predecessors, (36464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7742 states to 7742 states and 36464 transitions. [2021-10-13 21:32:18,195 INFO L78 Accepts]: Start accepts. Automaton has 7742 states and 36464 transitions. Word has length 24 [2021-10-13 21:32:18,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:18,195 INFO L470 AbstractCegarLoop]: Abstraction has 7742 states and 36464 transitions. [2021-10-13 21:32:18,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:18,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7742 states and 36464 transitions. [2021-10-13 21:32:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:32:18,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:18,204 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:18,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:18,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:18,404 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:32:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:18,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1773656665, now seen corresponding path program 9 times [2021-10-13 21:32:18,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:18,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061461982] [2021-10-13 21:32:18,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:32:18,405 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:18,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:18,406 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:18,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-13 21:32:19,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:32:19,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:19,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:32:19,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:19,649 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:32:19,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:32:19,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:32:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:32:20,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:21,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:21,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061461982] [2021-10-13 21:32:21,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061461982] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:21,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:21,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:32:21,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570704444] [2021-10-13 21:32:21,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:32:21,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:21,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:32:21,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:32:21,911 INFO L87 Difference]: Start difference. First operand 7742 states and 36464 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:27,615 INFO L93 Difference]: Finished difference Result 9826 states and 45509 transitions. [2021-10-13 21:32:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 21:32:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:32:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:27,667 INFO L225 Difference]: With dead ends: 9826 [2021-10-13 21:32:27,668 INFO L226 Difference]: Without dead ends: 9826 [2021-10-13 21:32:27,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 4233.2ms TimeCoverageRelationStatistics Valid=319, Invalid=871, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 21:32:27,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9826 states. [2021-10-13 21:32:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 7730. [2021-10-13 21:32:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7725 states have (on average 4.713268608414239) internal successors, (36410), 7729 states have internal predecessors, (36410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 36410 transitions. [2021-10-13 21:32:27,910 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 36410 transitions. Word has length 24 [2021-10-13 21:32:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:27,911 INFO L470 AbstractCegarLoop]: Abstraction has 7730 states and 36410 transitions. [2021-10-13 21:32:27,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 36410 transitions. [2021-10-13 21:32:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:32:27,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:27,920 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:27,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-10-13 21:32:28,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:28,121 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:32:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:28,122 INFO L82 PathProgramCache]: Analyzing trace with hash 666281515, now seen corresponding path program 10 times [2021-10-13 21:32:28,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:28,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579767548] [2021-10-13 21:32:28,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:32:28,123 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:28,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:28,124 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:28,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-13 21:32:28,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:32:28,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:28,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:32:28,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:28,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:28,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:29,425 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:32:29,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:32:29,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:32:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:32:30,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:31,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:31,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579767548] [2021-10-13 21:32:31,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579767548] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:31,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:31,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:32:31,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609921309] [2021-10-13 21:32:31,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:32:31,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:31,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:32:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:32:31,938 INFO L87 Difference]: Start difference. First operand 7730 states and 36410 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:37,913 INFO L93 Difference]: Finished difference Result 9558 states and 44333 transitions. [2021-10-13 21:32:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 21:32:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:32:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:37,950 INFO L225 Difference]: With dead ends: 9558 [2021-10-13 21:32:37,951 INFO L226 Difference]: Without dead ends: 9558 [2021-10-13 21:32:37,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 4208.6ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 21:32:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9558 states. [2021-10-13 21:32:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9558 to 7734. [2021-10-13 21:32:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7734 states, 7729 states have (on average 4.712123172467331) internal successors, (36420), 7733 states have internal predecessors, (36420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7734 states to 7734 states and 36420 transitions. [2021-10-13 21:32:38,176 INFO L78 Accepts]: Start accepts. Automaton has 7734 states and 36420 transitions. Word has length 24 [2021-10-13 21:32:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:38,176 INFO L470 AbstractCegarLoop]: Abstraction has 7734 states and 36420 transitions. [2021-10-13 21:32:38,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 7734 states and 36420 transitions. [2021-10-13 21:32:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:32:38,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:38,185 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:38,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:38,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:38,386 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:32:38,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:38,387 INFO L82 PathProgramCache]: Analyzing trace with hash -256651367, now seen corresponding path program 11 times [2021-10-13 21:32:38,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:38,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439755975] [2021-10-13 21:32:38,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:32:38,388 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:38,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:38,390 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:38,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-13 21:32:39,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:32:39,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:39,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:32:39,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:39,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:39,857 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:39,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439755975] [2021-10-13 21:32:39,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439755975] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:32:39,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:32:39,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-10-13 21:32:39,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663083656] [2021-10-13 21:32:39,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 21:32:39,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:39,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 21:32:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:32:39,859 INFO L87 Difference]: Start difference. First operand 7734 states and 36420 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-10-13 21:32:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:43,911 INFO L93 Difference]: Finished difference Result 11672 states and 55315 transitions. [2021-10-13 21:32:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 21:32:43,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 24 [2021-10-13 21:32:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:43,958 INFO L225 Difference]: With dead ends: 11672 [2021-10-13 21:32:43,959 INFO L226 Difference]: Without dead ends: 11672 [2021-10-13 21:32:43,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2304.6ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-10-13 21:32:43,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11672 states. [2021-10-13 21:32:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11672 to 8050. [2021-10-13 21:32:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8050 states, 8045 states have (on average 4.692355500310752) internal successors, (37750), 8049 states have internal predecessors, (37750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8050 states to 8050 states and 37750 transitions. [2021-10-13 21:32:44,194 INFO L78 Accepts]: Start accepts. Automaton has 8050 states and 37750 transitions. Word has length 24 [2021-10-13 21:32:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:44,194 INFO L470 AbstractCegarLoop]: Abstraction has 8050 states and 37750 transitions. [2021-10-13 21:32:44,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-10-13 21:32:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 8050 states and 37750 transitions. [2021-10-13 21:32:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:32:44,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:44,204 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:44,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:44,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:44,405 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:32:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash 5626479, now seen corresponding path program 12 times [2021-10-13 21:32:44,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:44,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823923764] [2021-10-13 21:32:44,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:32:44,407 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:44,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:44,408 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:44,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-13 21:32:45,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 21:32:45,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:32:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:45,675 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:32:45,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:32:45,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:32:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:32:47,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:48,054 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:48,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823923764] [2021-10-13 21:32:48,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823923764] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:48,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:48,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:32:48,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984515307] [2021-10-13 21:32:48,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:32:48,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:32:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:32:48,057 INFO L87 Difference]: Start difference. First operand 8050 states and 37750 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:54,698 INFO L93 Difference]: Finished difference Result 12142 states and 54952 transitions. [2021-10-13 21:32:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 21:32:54,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:32:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:54,745 INFO L225 Difference]: With dead ends: 12142 [2021-10-13 21:32:54,746 INFO L226 Difference]: Without dead ends: 12142 [2021-10-13 21:32:54,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 4626.4ms TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 21:32:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12142 states. [2021-10-13 21:32:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 8060. [2021-10-13 21:32:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8060 states, 8055 states have (on average 4.6929857231533205) internal successors, (37802), 8059 states have internal predecessors, (37802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8060 states to 8060 states and 37802 transitions. [2021-10-13 21:32:55,088 INFO L78 Accepts]: Start accepts. Automaton has 8060 states and 37802 transitions. Word has length 24 [2021-10-13 21:32:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:55,088 INFO L470 AbstractCegarLoop]: Abstraction has 8060 states and 37802 transitions. [2021-10-13 21:32:55,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8060 states and 37802 transitions. [2021-10-13 21:32:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:32:55,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:55,097 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:55,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:55,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:55,298 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:32:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1067458901, now seen corresponding path program 13 times [2021-10-13 21:32:55,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:55,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706499067] [2021-10-13 21:32:55,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:32:55,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:55,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:55,302 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:55,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-13 21:32:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:32:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:32:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:56,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:56,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:56,585 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:32:56,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:32:56,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:32:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:32:57,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:32:58,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:58,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706499067] [2021-10-13 21:32:58,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706499067] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:58,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:58,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:32:58,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221547069] [2021-10-13 21:32:58,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:32:58,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:32:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:32:58,864 INFO L87 Difference]: Start difference. First operand 8060 states and 37802 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:07,419 INFO L93 Difference]: Finished difference Result 13376 states and 60341 transitions. [2021-10-13 21:33:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 21:33:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:33:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:07,470 INFO L225 Difference]: With dead ends: 13376 [2021-10-13 21:33:07,470 INFO L226 Difference]: Without dead ends: 13376 [2021-10-13 21:33:07,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 6033.5ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 21:33:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13376 states. [2021-10-13 21:33:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13376 to 8054. [2021-10-13 21:33:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8054 states, 8049 states have (on average 4.692756864206734) internal successors, (37772), 8053 states have internal predecessors, (37772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8054 states to 8054 states and 37772 transitions. [2021-10-13 21:33:07,716 INFO L78 Accepts]: Start accepts. Automaton has 8054 states and 37772 transitions. Word has length 24 [2021-10-13 21:33:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:07,716 INFO L470 AbstractCegarLoop]: Abstraction has 8054 states and 37772 transitions. [2021-10-13 21:33:07,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 8054 states and 37772 transitions. [2021-10-13 21:33:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:33:07,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:07,727 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:07,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:07,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:07,935 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:33:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:07,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1151912235, now seen corresponding path program 14 times [2021-10-13 21:33:07,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:07,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634471233] [2021-10-13 21:33:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:33:07,936 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:07,937 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:07,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-13 21:33:08,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:33:08,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:33:08,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:08,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:08,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:09,283 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:33:09,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:33:09,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:33:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:33:10,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:33:11,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:11,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634471233] [2021-10-13 21:33:11,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634471233] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:11,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:11,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:33:11,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791408837] [2021-10-13 21:33:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:33:11,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:33:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:33:11,541 INFO L87 Difference]: Start difference. First operand 8054 states and 37772 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:18,350 INFO L93 Difference]: Finished difference Result 11026 states and 49303 transitions. [2021-10-13 21:33:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 21:33:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:33:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:18,390 INFO L225 Difference]: With dead ends: 11026 [2021-10-13 21:33:18,390 INFO L226 Difference]: Without dead ends: 11026 [2021-10-13 21:33:18,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4351.4ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 21:33:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11026 states. [2021-10-13 21:33:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11026 to 8058. [2021-10-13 21:33:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8058 states, 8053 states have (on average 4.69166770147771) internal successors, (37782), 8057 states have internal predecessors, (37782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8058 states to 8058 states and 37782 transitions. [2021-10-13 21:33:18,694 INFO L78 Accepts]: Start accepts. Automaton has 8058 states and 37782 transitions. Word has length 24 [2021-10-13 21:33:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:18,694 INFO L470 AbstractCegarLoop]: Abstraction has 8058 states and 37782 transitions. [2021-10-13 21:33:18,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8058 states and 37782 transitions. [2021-10-13 21:33:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:33:18,703 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:18,703 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:18,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:18,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:18,911 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:33:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1130906027, now seen corresponding path program 15 times [2021-10-13 21:33:18,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:18,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903485175] [2021-10-13 21:33:18,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:33:18,914 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:18,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:18,915 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:18,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-13 21:33:19,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:33:19,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:33:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:19,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:19,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:20,254 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:33:20,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:33:20,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:33:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:33:21,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:33:22,574 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:22,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903485175] [2021-10-13 21:33:22,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903485175] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:22,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:22,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:33:22,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368231039] [2021-10-13 21:33:22,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:33:22,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:22,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:33:22,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:33:22,577 INFO L87 Difference]: Start difference. First operand 8058 states and 37782 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:29,440 INFO L93 Difference]: Finished difference Result 12002 states and 54445 transitions. [2021-10-13 21:33:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 21:33:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:33:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:29,485 INFO L225 Difference]: With dead ends: 12002 [2021-10-13 21:33:29,486 INFO L226 Difference]: Without dead ends: 12002 [2021-10-13 21:33:29,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 4780.4ms TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 21:33:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-10-13 21:33:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 8064. [2021-10-13 21:33:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8064 states, 8059 states have (on average 4.690532324109691) internal successors, (37801), 8063 states have internal predecessors, (37801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8064 states to 8064 states and 37801 transitions. [2021-10-13 21:33:29,720 INFO L78 Accepts]: Start accepts. Automaton has 8064 states and 37801 transitions. Word has length 24 [2021-10-13 21:33:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:29,721 INFO L470 AbstractCegarLoop]: Abstraction has 8064 states and 37801 transitions. [2021-10-13 21:33:29,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 8064 states and 37801 transitions. [2021-10-13 21:33:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:33:29,728 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:29,728 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:29,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:29,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:29,929 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:33:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1132863585, now seen corresponding path program 16 times [2021-10-13 21:33:29,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:29,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749686165] [2021-10-13 21:33:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:33:29,931 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:29,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:29,933 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:29,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-13 21:33:30,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:33:30,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:30,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:33:30,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:30,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:31,259 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:33:31,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:33:31,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:33:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:33:32,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:33:33,490 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:33,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749686165] [2021-10-13 21:33:33,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749686165] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:33,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:33,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:33:33,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281221894] [2021-10-13 21:33:33,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:33:33,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:33:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:33:33,492 INFO L87 Difference]: Start difference. First operand 8064 states and 37801 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:41,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:41,234 INFO L93 Difference]: Finished difference Result 14706 states and 65567 transitions. [2021-10-13 21:33:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 21:33:41,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:33:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:41,287 INFO L225 Difference]: With dead ends: 14706 [2021-10-13 21:33:41,288 INFO L226 Difference]: Without dead ends: 14706 [2021-10-13 21:33:41,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 5390.7ms TimeCoverageRelationStatistics Valid=423, Invalid=1217, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 21:33:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14706 states. [2021-10-13 21:33:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14706 to 8082. [2021-10-13 21:33:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8082 states, 8077 states have (on average 4.690726754983286) internal successors, (37887), 8081 states have internal predecessors, (37887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8082 states to 8082 states and 37887 transitions. [2021-10-13 21:33:41,647 INFO L78 Accepts]: Start accepts. Automaton has 8082 states and 37887 transitions. Word has length 24 [2021-10-13 21:33:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:41,648 INFO L470 AbstractCegarLoop]: Abstraction has 8082 states and 37887 transitions. [2021-10-13 21:33:41,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8082 states and 37887 transitions. [2021-10-13 21:33:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:33:41,655 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:41,655 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:41,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:41,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:41,856 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:33:41,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:41,858 INFO L82 PathProgramCache]: Analyzing trace with hash -24675129, now seen corresponding path program 17 times [2021-10-13 21:33:41,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:41,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079856360] [2021-10-13 21:33:41,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:33:41,860 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:41,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:41,860 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:41,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-13 21:33:42,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:33:42,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:42,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:33:42,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:33:43,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:33:43,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:43,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079856360] [2021-10-13 21:33:43,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079856360] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:33:43,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:33:43,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-10-13 21:33:43,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910313450] [2021-10-13 21:33:43,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 21:33:43,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 21:33:43,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:33:43,356 INFO L87 Difference]: Start difference. First operand 8082 states and 37887 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-10-13 21:33:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:46,677 INFO L93 Difference]: Finished difference Result 13100 states and 58329 transitions. [2021-10-13 21:33:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 21:33:46,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 24 [2021-10-13 21:33:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:46,726 INFO L225 Difference]: With dead ends: 13100 [2021-10-13 21:33:46,727 INFO L226 Difference]: Without dead ends: 13100 [2021-10-13 21:33:46,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1501.2ms TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-10-13 21:33:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13100 states. [2021-10-13 21:33:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13100 to 8150. [2021-10-13 21:33:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8150 states, 8145 states have (on average 4.678453038674033) internal successors, (38106), 8149 states have internal predecessors, (38106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8150 states to 8150 states and 38106 transitions. [2021-10-13 21:33:47,042 INFO L78 Accepts]: Start accepts. Automaton has 8150 states and 38106 transitions. Word has length 24 [2021-10-13 21:33:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:47,042 INFO L470 AbstractCegarLoop]: Abstraction has 8150 states and 38106 transitions. [2021-10-13 21:33:47,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-10-13 21:33:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 8150 states and 38106 transitions. [2021-10-13 21:33:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:33:47,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:47,050 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:47,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:47,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:47,251 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:33:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:47,252 INFO L82 PathProgramCache]: Analyzing trace with hash 545627463, now seen corresponding path program 18 times [2021-10-13 21:33:47,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:47,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116456292] [2021-10-13 21:33:47,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:33:47,253 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:47,255 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:47,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-13 21:33:48,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 21:33:48,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:48,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:33:48,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:48,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:48,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:48,701 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:33:48,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:33:48,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:33:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:33:49,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:33:50,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:50,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116456292] [2021-10-13 21:33:50,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116456292] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:50,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:50,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:33:50,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92987377] [2021-10-13 21:33:50,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:33:50,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:50,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:33:50,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:33:50,942 INFO L87 Difference]: Start difference. First operand 8150 states and 38106 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:58,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:58,640 INFO L93 Difference]: Finished difference Result 12048 states and 54501 transitions. [2021-10-13 21:33:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 21:33:58,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:33:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:58,686 INFO L225 Difference]: With dead ends: 12048 [2021-10-13 21:33:58,686 INFO L226 Difference]: Without dead ends: 12048 [2021-10-13 21:33:58,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4915.6ms TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 21:33:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12048 states. [2021-10-13 21:33:59,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12048 to 8150. [2021-10-13 21:33:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8150 states, 8145 states have (on average 4.678453038674033) internal successors, (38106), 8149 states have internal predecessors, (38106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8150 states to 8150 states and 38106 transitions. [2021-10-13 21:33:59,085 INFO L78 Accepts]: Start accepts. Automaton has 8150 states and 38106 transitions. Word has length 24 [2021-10-13 21:33:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:59,085 INFO L470 AbstractCegarLoop]: Abstraction has 8150 states and 38106 transitions. [2021-10-13 21:33:59,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 8150 states and 38106 transitions. [2021-10-13 21:33:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:33:59,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:59,093 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:33:59,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:59,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:59,294 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:33:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash -56632163, now seen corresponding path program 19 times [2021-10-13 21:33:59,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:59,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032011428] [2021-10-13 21:33:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:33:59,296 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:59,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:59,297 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:59,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-13 21:34:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:34:00,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:34:00,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:34:00,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:34:00,700 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:34:00,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:34:00,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:34:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:34:01,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:34:02,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:02,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032011428] [2021-10-13 21:34:02,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032011428] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:02,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:02,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:34:02,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801350347] [2021-10-13 21:34:02,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:34:02,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:34:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:34:02,914 INFO L87 Difference]: Start difference. First operand 8150 states and 38106 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:34:09,283 INFO L93 Difference]: Finished difference Result 10800 states and 48387 transitions. [2021-10-13 21:34:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 21:34:09,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:34:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:34:09,333 INFO L225 Difference]: With dead ends: 10800 [2021-10-13 21:34:09,334 INFO L226 Difference]: Without dead ends: 10800 [2021-10-13 21:34:09,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3959.7ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:34:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10800 states. [2021-10-13 21:34:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10800 to 8158. [2021-10-13 21:34:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8153 states have (on average 4.6760701582239665) internal successors, (38124), 8157 states have internal predecessors, (38124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 38124 transitions. [2021-10-13 21:34:09,579 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 38124 transitions. Word has length 24 [2021-10-13 21:34:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:34:09,579 INFO L470 AbstractCegarLoop]: Abstraction has 8158 states and 38124 transitions. [2021-10-13 21:34:09,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 38124 transitions. [2021-10-13 21:34:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:34:09,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:34:09,588 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:34:09,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-13 21:34:09,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:34:09,789 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:34:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:34:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash -978334303, now seen corresponding path program 20 times [2021-10-13 21:34:09,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:34:09,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154345566] [2021-10-13 21:34:09,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:34:09,791 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:34:09,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:34:09,792 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:34:09,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-10-13 21:34:10,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:34:10,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:34:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:34:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:10,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:34:10,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:34:11,392 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:34:11,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:34:11,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:34:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:34:12,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:34:13,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:13,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154345566] [2021-10-13 21:34:13,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154345566] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:13,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:13,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:34:13,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833174002] [2021-10-13 21:34:13,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:34:13,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:34:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:34:13,642 INFO L87 Difference]: Start difference. First operand 8158 states and 38124 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:34:18,764 INFO L93 Difference]: Finished difference Result 10804 states and 48424 transitions. [2021-10-13 21:34:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 21:34:18,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:34:18,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:34:18,803 INFO L225 Difference]: With dead ends: 10804 [2021-10-13 21:34:18,804 INFO L226 Difference]: Without dead ends: 10804 [2021-10-13 21:34:18,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 3325.0ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 21:34:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-10-13 21:34:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 8158. [2021-10-13 21:34:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8153 states have (on average 4.6760701582239665) internal successors, (38124), 8157 states have internal predecessors, (38124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 38124 transitions. [2021-10-13 21:34:19,185 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 38124 transitions. Word has length 24 [2021-10-13 21:34:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:34:19,185 INFO L470 AbstractCegarLoop]: Abstraction has 8158 states and 38124 transitions. [2021-10-13 21:34:19,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 38124 transitions. [2021-10-13 21:34:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:34:19,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:34:19,193 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:34:19,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-10-13 21:34:19,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:34:19,394 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:34:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:34:19,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2030600507, now seen corresponding path program 21 times [2021-10-13 21:34:19,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:34:19,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452179159] [2021-10-13 21:34:19,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:34:19,397 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:34:19,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:34:19,398 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:34:19,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-10-13 21:34:20,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:34:20,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:34:20,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:34:20,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:34:20,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:34:20,901 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:34:20,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:34:21,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:34:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:34:22,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:34:23,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:23,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452179159] [2021-10-13 21:34:23,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452179159] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:23,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:23,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:34:23,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109166778] [2021-10-13 21:34:23,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:34:23,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:34:23,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:34:23,279 INFO L87 Difference]: Start difference. First operand 8158 states and 38124 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:34:33,213 INFO L93 Difference]: Finished difference Result 13020 states and 57874 transitions. [2021-10-13 21:34:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 21:34:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:34:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:34:33,268 INFO L225 Difference]: With dead ends: 13020 [2021-10-13 21:34:33,268 INFO L226 Difference]: Without dead ends: 13020 [2021-10-13 21:34:33,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 7000.7ms TimeCoverageRelationStatistics Valid=515, Invalid=1555, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 21:34:33,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13020 states. [2021-10-13 21:34:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13020 to 8154. [2021-10-13 21:34:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8149 states have (on average 4.676647441403853) internal successors, (38110), 8153 states have internal predecessors, (38110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 38110 transitions. [2021-10-13 21:34:33,560 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 38110 transitions. Word has length 24 [2021-10-13 21:34:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:34:33,560 INFO L470 AbstractCegarLoop]: Abstraction has 8154 states and 38110 transitions. [2021-10-13 21:34:33,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 38110 transitions. [2021-10-13 21:34:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:34:33,569 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:34:33,569 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:34:33,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-10-13 21:34:33,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:34:33,770 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:34:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:34:33,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1699167639, now seen corresponding path program 22 times [2021-10-13 21:34:33,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:34:33,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403230693] [2021-10-13 21:34:33,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:34:33,772 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:34:33,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:34:33,773 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:34:33,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-13 21:34:34,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:34:34,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:34:34,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:34:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:34:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:34:35,299 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:34:35,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:34:35,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:34:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:34:36,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:34:37,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:37,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403230693] [2021-10-13 21:34:37,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403230693] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:37,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:37,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:34:37,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469097538] [2021-10-13 21:34:37,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:34:37,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:37,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:34:37,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:34:37,907 INFO L87 Difference]: Start difference. First operand 8154 states and 38110 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:34:48,372 INFO L93 Difference]: Finished difference Result 13992 states and 60848 transitions. [2021-10-13 21:34:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 21:34:48,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:34:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:34:48,433 INFO L225 Difference]: With dead ends: 13992 [2021-10-13 21:34:48,433 INFO L226 Difference]: Without dead ends: 13992 [2021-10-13 21:34:48,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 6822.1ms TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 21:34:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13992 states. [2021-10-13 21:34:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13992 to 8154. [2021-10-13 21:34:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8149 states have (on average 4.676647441403853) internal successors, (38110), 8153 states have internal predecessors, (38110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 38110 transitions. [2021-10-13 21:34:48,794 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 38110 transitions. Word has length 24 [2021-10-13 21:34:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:34:48,794 INFO L470 AbstractCegarLoop]: Abstraction has 8154 states and 38110 transitions. [2021-10-13 21:34:48,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:34:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 38110 transitions. [2021-10-13 21:34:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:34:48,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:34:48,802 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:34:48,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-10-13 21:34:49,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:34:49,003 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:34:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:34:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash 918236107, now seen corresponding path program 23 times [2021-10-13 21:34:49,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:34:49,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606413111] [2021-10-13 21:34:49,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:34:49,006 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:34:49,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:34:49,007 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:34:49,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-10-13 21:34:50,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:34:50,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:34:50,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 21:34:50,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:34:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:34:51,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:34:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:34:52,619 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:34:52,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606413111] [2021-10-13 21:34:52,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606413111] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:34:52,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:34:52,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:34:52,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241985357] [2021-10-13 21:34:52,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:34:52,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:34:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:34:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:34:52,621 INFO L87 Difference]: Start difference. First operand 8154 states and 38110 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:02,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:02,267 INFO L93 Difference]: Finished difference Result 15284 states and 66921 transitions. [2021-10-13 21:35:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 21:35:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:35:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:02,350 INFO L225 Difference]: With dead ends: 15284 [2021-10-13 21:35:02,350 INFO L226 Difference]: Without dead ends: 15284 [2021-10-13 21:35:02,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 7497.1ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 21:35:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15284 states. [2021-10-13 21:35:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15284 to 8148. [2021-10-13 21:35:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8148 states, 8143 states have (on average 4.676409185803758) internal successors, (38080), 8147 states have internal predecessors, (38080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8148 states to 8148 states and 38080 transitions. [2021-10-13 21:35:02,688 INFO L78 Accepts]: Start accepts. Automaton has 8148 states and 38080 transitions. Word has length 24 [2021-10-13 21:35:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:02,689 INFO L470 AbstractCegarLoop]: Abstraction has 8148 states and 38080 transitions. [2021-10-13 21:35:02,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 8148 states and 38080 transitions. [2021-10-13 21:35:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:35:02,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:02,699 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:02,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:02,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:35:02,900 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:35:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash 854788981, now seen corresponding path program 24 times [2021-10-13 21:35:02,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:02,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883090008] [2021-10-13 21:35:02,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:35:02,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:02,903 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:35:02,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-10-13 21:35:04,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 21:35:04,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:35:04,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:35:04,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:04,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:04,598 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:35:04,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:35:04,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:35:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:06,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:35:07,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:07,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883090008] [2021-10-13 21:35:07,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883090008] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:07,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:07,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:35:07,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928886504] [2021-10-13 21:35:07,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:35:07,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:07,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:35:07,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:35:07,528 INFO L87 Difference]: Start difference. First operand 8148 states and 38080 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:15,944 INFO L93 Difference]: Finished difference Result 12874 states and 57285 transitions. [2021-10-13 21:35:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 21:35:15,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:35:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:15,992 INFO L225 Difference]: With dead ends: 12874 [2021-10-13 21:35:15,993 INFO L226 Difference]: Without dead ends: 12874 [2021-10-13 21:35:15,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 5849.6ms TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 21:35:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12874 states. [2021-10-13 21:35:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12874 to 8150. [2021-10-13 21:35:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8150 states, 8145 states have (on average 4.674401473296501) internal successors, (38073), 8149 states have internal predecessors, (38073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8150 states to 8150 states and 38073 transitions. [2021-10-13 21:35:16,250 INFO L78 Accepts]: Start accepts. Automaton has 8150 states and 38073 transitions. Word has length 24 [2021-10-13 21:35:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:16,250 INFO L470 AbstractCegarLoop]: Abstraction has 8150 states and 38073 transitions. [2021-10-13 21:35:16,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 8150 states and 38073 transitions. [2021-10-13 21:35:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:35:16,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:16,258 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:16,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:16,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:35:16,459 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:35:16,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:16,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1435531095, now seen corresponding path program 25 times [2021-10-13 21:35:16,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:16,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404106359] [2021-10-13 21:35:16,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:35:16,461 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:16,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:16,463 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:35:16,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-10-13 21:35:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:35:17,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:35:17,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:17,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:17,996 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:35:17,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:35:18,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:35:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:19,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:35:20,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:20,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404106359] [2021-10-13 21:35:20,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404106359] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:20,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:20,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:35:20,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461759278] [2021-10-13 21:35:20,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:35:20,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:20,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:35:20,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:35:20,304 INFO L87 Difference]: Start difference. First operand 8150 states and 38073 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:28,473 INFO L93 Difference]: Finished difference Result 14194 states and 64178 transitions. [2021-10-13 21:35:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 21:35:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:35:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:28,531 INFO L225 Difference]: With dead ends: 14194 [2021-10-13 21:35:28,531 INFO L226 Difference]: Without dead ends: 14194 [2021-10-13 21:35:28,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 5668.4ms TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 21:35:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14194 states. [2021-10-13 21:35:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14194 to 8156. [2021-10-13 21:35:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8156 states, 8151 states have (on average 4.6746411483253585) internal successors, (38103), 8155 states have internal predecessors, (38103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8156 states to 8156 states and 38103 transitions. [2021-10-13 21:35:28,805 INFO L78 Accepts]: Start accepts. Automaton has 8156 states and 38103 transitions. Word has length 24 [2021-10-13 21:35:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:28,805 INFO L470 AbstractCegarLoop]: Abstraction has 8156 states and 38103 transitions. [2021-10-13 21:35:28,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8156 states and 38103 transitions. [2021-10-13 21:35:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:35:28,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:28,813 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:28,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:29,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:35:29,014 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:35:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:29,015 INFO L82 PathProgramCache]: Analyzing trace with hash 362445715, now seen corresponding path program 26 times [2021-10-13 21:35:29,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:29,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254322341] [2021-10-13 21:35:29,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:35:29,017 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:29,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:29,018 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:35:29,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-10-13 21:35:30,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:35:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:35:30,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:35:30,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:30,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:30,809 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:35:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:35:31,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:35:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:32,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:35:33,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:33,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254322341] [2021-10-13 21:35:33,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254322341] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:33,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:33,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:35:33,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591803752] [2021-10-13 21:35:33,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:35:33,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:35:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:35:33,271 INFO L87 Difference]: Start difference. First operand 8156 states and 38103 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:40,874 INFO L93 Difference]: Finished difference Result 13252 states and 59573 transitions. [2021-10-13 21:35:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 21:35:40,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:35:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:40,924 INFO L225 Difference]: With dead ends: 13252 [2021-10-13 21:35:40,925 INFO L226 Difference]: Without dead ends: 13252 [2021-10-13 21:35:40,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5356.2ms TimeCoverageRelationStatistics Valid=424, Invalid=1136, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 21:35:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13252 states. [2021-10-13 21:35:41,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13252 to 8156. [2021-10-13 21:35:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8156 states, 8151 states have (on average 4.672310145994357) internal successors, (38084), 8155 states have internal predecessors, (38084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8156 states to 8156 states and 38084 transitions. [2021-10-13 21:35:41,192 INFO L78 Accepts]: Start accepts. Automaton has 8156 states and 38084 transitions. Word has length 24 [2021-10-13 21:35:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:41,193 INFO L470 AbstractCegarLoop]: Abstraction has 8156 states and 38084 transitions. [2021-10-13 21:35:41,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8156 states and 38084 transitions. [2021-10-13 21:35:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:35:41,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:41,202 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:41,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:41,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:35:41,418 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:35:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:41,419 INFO L82 PathProgramCache]: Analyzing trace with hash 610891389, now seen corresponding path program 27 times [2021-10-13 21:35:41,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:41,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013258475] [2021-10-13 21:35:41,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:35:41,420 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:41,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:41,422 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:35:41,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-10-13 21:35:42,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:35:42,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:35:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:35:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:42,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:43,072 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:35:43,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:35:43,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:35:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:44,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:35:45,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:45,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013258475] [2021-10-13 21:35:45,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013258475] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:45,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:45,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:35:45,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805495409] [2021-10-13 21:35:45,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:35:45,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:35:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:35:45,131 INFO L87 Difference]: Start difference. First operand 8156 states and 38084 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:35:53,899 INFO L93 Difference]: Finished difference Result 15562 states and 71132 transitions. [2021-10-13 21:35:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 21:35:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:35:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:35:53,955 INFO L225 Difference]: With dead ends: 15562 [2021-10-13 21:35:53,956 INFO L226 Difference]: Without dead ends: 15562 [2021-10-13 21:35:53,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 5249.1ms TimeCoverageRelationStatistics Valid=475, Invalid=1417, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 21:35:53,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15562 states. [2021-10-13 21:35:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15562 to 8168. [2021-10-13 21:35:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8163 states have (on average 4.671689329903222) internal successors, (38135), 8167 states have internal predecessors, (38135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 38135 transitions. [2021-10-13 21:35:54,209 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 38135 transitions. Word has length 24 [2021-10-13 21:35:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:35:54,210 INFO L470 AbstractCegarLoop]: Abstraction has 8168 states and 38135 transitions. [2021-10-13 21:35:54,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:35:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 38135 transitions. [2021-10-13 21:35:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:35:54,218 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:35:54,218 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:35:54,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-10-13 21:35:54,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:35:54,419 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:35:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:35:54,420 INFO L82 PathProgramCache]: Analyzing trace with hash 824491013, now seen corresponding path program 28 times [2021-10-13 21:35:54,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:35:54,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37665999] [2021-10-13 21:35:54,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:35:54,421 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:35:54,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:35:54,423 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:35:54,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-10-13 21:35:55,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:35:55,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:35:55,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:35:55,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:35:55,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:35:56,086 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:35:56,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:35:56,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 21:35:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:35:57,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:35:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:35:58,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:35:58,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37665999] [2021-10-13 21:35:58,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37665999] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:35:58,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:35:58,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:35:58,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508766018] [2021-10-13 21:35:58,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:35:58,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:35:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:35:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:35:58,103 INFO L87 Difference]: Start difference. First operand 8168 states and 38135 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:36:06,093 INFO L93 Difference]: Finished difference Result 15628 states and 71416 transitions. [2021-10-13 21:36:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 21:36:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 21:36:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:36:06,152 INFO L225 Difference]: With dead ends: 15628 [2021-10-13 21:36:06,152 INFO L226 Difference]: Without dead ends: 15628 [2021-10-13 21:36:06,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 4799.3ms TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 21:36:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15628 states. [2021-10-13 21:36:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15628 to 8174. [2021-10-13 21:36:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8174 states, 8169 states have (on average 4.671930468845636) internal successors, (38165), 8173 states have internal predecessors, (38165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 38165 transitions. [2021-10-13 21:36:06,423 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 38165 transitions. Word has length 24 [2021-10-13 21:36:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:36:06,424 INFO L470 AbstractCegarLoop]: Abstraction has 8174 states and 38165 transitions. [2021-10-13 21:36:06,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:36:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 38165 transitions. [2021-10-13 21:36:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 21:36:06,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:36:06,431 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:36:06,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:06,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:36:06,632 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:36:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:36:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash -248594367, now seen corresponding path program 29 times [2021-10-13 21:36:06,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:36:06,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283570708] [2021-10-13 21:36:06,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:36:06,634 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:36:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:36:06,635 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:36:06,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-10-13 21:36:07,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:36:07,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:36:07,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 21:36:07,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:36:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:36:08,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:36:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:36:09,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:36:09,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283570708] [2021-10-13 21:36:09,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283570708] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:36:09,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:36:09,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-13 21:36:09,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609859030] [2021-10-13 21:36:09,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:36:09,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:36:09,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:36:09,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:36:09,648 INFO L87 Difference]: Start difference. First operand 8174 states and 38165 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-10-13 21:36:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 21:36:18,501 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:36:18,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:18,523 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:36:18,532 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:36:18,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:36:18,704 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). [2021-10-13 21:36:18,706 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:36:18,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:36:18,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 21:36:18,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 21:36:18,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:36:18,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:36:18,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:36:18,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:36:18,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 21:36:18,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 21:36:18,708 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-13 21:36:18,708 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-13 21:36:18,708 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 21:36:18,708 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 21:36:18,708 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 21:36:18,708 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 21:36:18,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 21:36:18,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 21:36:18,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 21:36:18,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 21:36:18,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 21:36:18,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 21:36:18,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 21:36:18,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 21:36:18,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 21:36:18,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 21:36:18,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:36:18,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 21:36:18,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 21:36:18,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-13 21:36:18,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:36:18,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:36:18,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 21:36:18,710 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 21:36:18,711 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:36:18,711 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:36:18,711 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:36:18,711 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:36:18,711 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 21:36:18,711 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 21:36:18,711 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-13 21:36:18,711 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-13 21:36:18,718 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 21:36:18,718 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 21:36:18,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:36:18 BasicIcfg [2021-10-13 21:36:18,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 21:36:18,721 INFO L168 Benchmark]: Toolchain (without parser) took 821206.65 ms. Allocated memory was 178.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 152.1 MB in the beginning and 519.5 MB in the end (delta: -367.4 MB). Peak memory consumption was 969.8 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:18,722 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 178.3 MB. Free memory is still 150.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 21:36:18,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 422.58 ms. Allocated memory is still 178.3 MB. Free memory was 151.8 MB in the beginning and 138.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:18,722 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.32 ms. Allocated memory is still 178.3 MB. Free memory was 138.5 MB in the beginning and 136.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:18,722 INFO L168 Benchmark]: Boogie Preprocessor took 39.58 ms. Allocated memory is still 178.3 MB. Free memory was 136.7 MB in the beginning and 134.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:18,723 INFO L168 Benchmark]: RCFGBuilder took 881.71 ms. Allocated memory is still 178.3 MB. Free memory was 134.9 MB in the beginning and 147.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:18,723 INFO L168 Benchmark]: TraceAbstraction took 819755.62 ms. Allocated memory was 178.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 147.0 MB in the beginning and 519.5 MB in the end (delta: -372.5 MB). Peak memory consumption was 963.9 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:18,725 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 178.3 MB. Free memory is still 150.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 422.58 ms. Allocated memory is still 178.3 MB. Free memory was 151.8 MB in the beginning and 138.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 86.32 ms. Allocated memory is still 178.3 MB. Free memory was 138.5 MB in the beginning and 136.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.58 ms. Allocated memory is still 178.3 MB. Free memory was 136.7 MB in the beginning and 134.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 881.71 ms. Allocated memory is still 178.3 MB. Free memory was 134.9 MB in the beginning and 147.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 819755.62 ms. Allocated memory was 178.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 147.0 MB in the beginning and 519.5 MB in the end (delta: -372.5 MB). Peak memory consumption was 963.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 32249.7ms, 192 PlacesBefore, 63 PlacesAfterwards, 197 TransitionsBefore, 59 TransitionsAfterwards, 5658 CoEnabledTransitionPairs, 7 FixpointIterations, 92 TrivialSequentialCompositions, 80 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 22 ConcurrentYvCompositions, 9 ChoiceCompositions, 214 TotalNumberOfCompositions, 7883 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6702, positive: 6641, positive conditional: 0, positive unconditional: 6641, negative: 61, negative conditional: 0, negative unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3710, positive: 3690, positive conditional: 0, positive unconditional: 3690, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3710, positive: 3690, positive conditional: 0, positive unconditional: 3690, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 20, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1515, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1515, negative conditional: 0, negative unconditional: 1515, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6702, positive: 2951, positive conditional: 0, positive unconditional: 2951, negative: 41, negative conditional: 0, negative unconditional: 41, unknown: 3710, unknown conditional: 0, unknown unconditional: 3710] , Statistics on independence cache: Total cache size (in pairs): 227, Positive cache size: 221, Positive conditional cache size: 0, Positive unconditional cache size: 221, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8174states) and FLOYD_HOARE automaton (currently 35 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (13835 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 249 locations, 43 error locations. Started 1 CEGAR loops. OverallTime: 819530.0ms, OverallIterations: 67, TraceHistogramMax: 14, EmptinessCheckTime: 347.2ms, AutomataDifference: 558219.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32431.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3770 SDtfs, 31524 SDslu, 24097 SDs, 0 SdLazy, 36867 SolverSat, 2468 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 242472.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3002 GetRequests, 1346 SyntacticMatches, 25 SemanticMatches, 1631 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11299 ImplicationChecksByTransitivity, 352900.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8174occurred in iteration=66, InterpolantAutomatonStates: 1270, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13627.1ms AutomataMinimizationTime, 66 MinimizatonAttempts, 257470 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 671.1ms SsaConstructionTime, 8751.1ms SatisfiabilityAnalysisTime, 165990.4ms InterpolantComputationTime, 1111 NumberOfCodeBlocks, 1109 NumberOfCodeBlocksAsserted, 119 NumberOfCheckSat, 2088 ConstructedInterpolants, 148 QuantifiedInterpolants, 28805 SizeOfPredicates, 828 NumberOfNonLiveVariables, 7681 ConjunctsInSsa, 1106 ConjunctsInUnsatCore, 134 InterpolantComputations, 38 PerfectInterpolantSequences, 340/1120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown