/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:08:38,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:08:38,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:08:38,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 21:08:38,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:08:38,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:08:38,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:08:38,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:08:38,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:08:38,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:08:38,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:08:38,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:08:38,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:08:38,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:08:38,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:08:38,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:08:38,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 21:08:38,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 21:08:38,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 21:08:38,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 21:08:38,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 21:08:38,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 21:08:38,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 21:08:38,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 21:08:38,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 21:08:38,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:08:38,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:08:38,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:08:38,973 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 21:08:39,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:08:39,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:08:39,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:08:39,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:08:39,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:08:39,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:08:39,004 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:08:39,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:08:39,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:08:39,005 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:08:39,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:08:39,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:08:39,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:08:39,006 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:08:39,006 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:08:39,006 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:08:39,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:08:39,006 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:08:39,007 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:08:39,007 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:08:39,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:08:39,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:08:39,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:08:39,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:08:39,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:08:39,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:08:39,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:08:39,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:08:39,009 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:08:39,009 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:08:39,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:08:39,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:08:39,009 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:08:39,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:08:39,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:08:39,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:08:39,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:08:39,422 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:08:39,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2021-10-13 21:08:39,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bfccec55b/af1d49dc4d76441c877d26349d66f4ff/FLAG4df2f98b6 [2021-10-13 21:08:40,072 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:08:40,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2021-10-13 21:08:40,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bfccec55b/af1d49dc4d76441c877d26349d66f4ff/FLAG4df2f98b6 [2021-10-13 21:08:40,415 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bfccec55b/af1d49dc4d76441c877d26349d66f4ff [2021-10-13 21:08:40,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:08:40,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:08:40,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:08:40,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:08:40,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:08:40,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561e48ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40, skipping insertion in model container [2021-10-13 21:08:40,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:08:40,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:08:40,656 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2021-10-13 21:08:40,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:08:40,681 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 21:08:40,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:08:40,703 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2021-10-13 21:08:40,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:08:40,714 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:08:40,742 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2021-10-13 21:08:40,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:08:40,779 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:08:40,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40 WrapperNode [2021-10-13 21:08:40,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:08:40,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:08:40,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:08:40,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:08:40,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:08:40,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:08:40,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:08:40,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:08:40,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:08:40,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:08:40,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:08:40,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:08:40,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2021-10-13 21:08:40,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:08:40,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:08:40,979 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 21:08:40,997 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 21:08:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:08:41,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:08:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:08:41,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:08:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 21:08:41,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 21:08:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:08:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:08:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 21:08:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 21:08:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 21:08:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:08:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:08:41,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:08:41,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:08:41,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:08:41,042 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 21:08:42,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:08:42,478 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 21:08:42,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:42 BoogieIcfgContainer [2021-10-13 21:08:42,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:08:42,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:08:42,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:08:42,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:08:42,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:40" (1/3) ... [2021-10-13 21:08:42,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21efc50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:42, skipping insertion in model container [2021-10-13 21:08:42,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (2/3) ... [2021-10-13 21:08:42,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21efc50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:42, skipping insertion in model container [2021-10-13 21:08:42,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:42" (3/3) ... [2021-10-13 21:08:42,491 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2021-10-13 21:08:42,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:08:42,498 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-13 21:08:42,498 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:08:42,537 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,537 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,538 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,538 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,538 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,539 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,539 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,539 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,539 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,539 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,540 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,540 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,540 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,540 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,541 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,541 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,541 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,541 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,542 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,542 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,542 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,543 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,543 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,543 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,544 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,544 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,544 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,546 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,546 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,546 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,546 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,547 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,547 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,547 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,548 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,548 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,548 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,548 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,549 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,549 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,549 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,550 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,550 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,550 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,550 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,551 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,551 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,552 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,552 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,552 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,552 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,552 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,553 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,553 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,554 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,554 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,554 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,554 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,555 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,556 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,556 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,557 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,557 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,558 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,558 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,558 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,559 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,559 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,559 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,560 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,560 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,560 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,561 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,561 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,561 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,561 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,562 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,562 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,562 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,563 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,564 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,565 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,565 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,568 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,573 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,574 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,574 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,574 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,574 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,575 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,576 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,576 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,576 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,576 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,577 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,581 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,581 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,582 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,582 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,582 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,587 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,589 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,589 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,589 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,589 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,589 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,590 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:42,610 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-13 21:08:42,690 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:08:42,703 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 21:08:42,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-13 21:08:42,730 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:08:42,742 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 172 transitions, 368 flow [2021-10-13 21:08:42,749 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 172 transitions, 368 flow [2021-10-13 21:08:42,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 368 flow [2021-10-13 21:08:42,866 INFO L129 PetriNetUnfolder]: 13/169 cut-off events. [2021-10-13 21:08:42,867 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-13 21:08:42,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 169 events. 13/169 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2021-10-13 21:08:42,882 INFO L116 LiptonReduction]: Number of co-enabled transitions 2688 [2021-10-13 21:09:12,807 INFO L131 LiptonReduction]: Checked pairs total: 3569 [2021-10-13 21:09:12,807 INFO L133 LiptonReduction]: Total number of compositions: 181 [2021-10-13 21:09:12,818 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2021-10-13 21:09:12,904 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:09:12,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:12,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:09:12,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:12,925 INFO L82 PathProgramCache]: Analyzing trace with hash 22959, now seen corresponding path program 1 times [2021-10-13 21:09:12,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:12,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944160134] [2021-10-13 21:09:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:12,940 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:12,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:12,946 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 21:09:12,953 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 21:09:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:09:13,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:13,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:13,544 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:13,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:09:13,690 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 21:09:13,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:13,819 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 21:09:13,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:13,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944160134] [2021-10-13 21:09:13,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944160134] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:13,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:13,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:13,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3309410] [2021-10-13 21:09:13,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:13,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:13,859 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:14,370 INFO L93 Difference]: Finished difference Result 1498 states and 5133 transitions. [2021-10-13 21:09:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:09:14,372 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 21:09:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:14,409 INFO L225 Difference]: With dead ends: 1498 [2021-10-13 21:09:14,409 INFO L226 Difference]: Without dead ends: 1498 [2021-10-13 21:09:14,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-10-13 21:09:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 751. [2021-10-13 21:09:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 618 states have (on average 4.166666666666667) internal successors, (2575), 750 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2575 transitions. [2021-10-13 21:09:14,532 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2575 transitions. Word has length 2 [2021-10-13 21:09:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:14,533 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2575 transitions. [2021-10-13 21:09:14,533 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 21:09:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2575 transitions. [2021-10-13 21:09:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:09:14,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:14,534 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:09:14,550 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 21:09:14,747 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 21:09:14,748 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:14,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:14,750 INFO L82 PathProgramCache]: Analyzing trace with hash 23067, now seen corresponding path program 1 times [2021-10-13 21:09:14,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:14,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750501090] [2021-10-13 21:09:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:14,752 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:14,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:14,758 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 21:09:14,760 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 21:09:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:14,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:09:14,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:14,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:14,894 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 21:09:14,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:14,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750501090] [2021-10-13 21:09:14,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750501090] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:14,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:14,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:14,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29724888] [2021-10-13 21:09:14,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:14,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:14,898 INFO L87 Difference]: Start difference. First operand 751 states and 2575 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:15,003 INFO L93 Difference]: Finished difference Result 752 states and 2572 transitions. [2021-10-13 21:09:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:09:15,004 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 21:09:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:15,012 INFO L225 Difference]: With dead ends: 752 [2021-10-13 21:09:15,013 INFO L226 Difference]: Without dead ends: 752 [2021-10-13 21:09:15,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-10-13 21:09:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 751. [2021-10-13 21:09:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 618 states have (on average 4.1618122977346275) internal successors, (2572), 750 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:15,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2572 transitions. [2021-10-13 21:09:15,046 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2572 transitions. Word has length 2 [2021-10-13 21:09:15,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:15,046 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2572 transitions. [2021-10-13 21:09:15,047 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 21:09:15,047 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2572 transitions. [2021-10-13 21:09:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:09:15,047 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:15,047 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:09:15,059 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 21:09:15,260 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 21:09:15,261 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:15,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:15,262 INFO L82 PathProgramCache]: Analyzing trace with hash 22957, now seen corresponding path program 1 times [2021-10-13 21:09:15,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:15,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032389461] [2021-10-13 21:09:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:15,264 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:15,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:15,265 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 21:09:15,290 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 21:09:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:15,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:09:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:15,657 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:09:15,658 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 21:09:16,243 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 21:09:16,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:16,247 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 21:09:16,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:16,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032389461] [2021-10-13 21:09:16,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032389461] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:16,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:16,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:09:16,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44999417] [2021-10-13 21:09:16,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:09:16,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:16,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:09:16,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:16,250 INFO L87 Difference]: Start difference. First operand 751 states and 2572 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:16,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:16,361 INFO L93 Difference]: Finished difference Result 750 states and 2569 transitions. [2021-10-13 21:09:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:16,362 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 21:09:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:16,371 INFO L225 Difference]: With dead ends: 750 [2021-10-13 21:09:16,371 INFO L226 Difference]: Without dead ends: 750 [2021-10-13 21:09:16,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-10-13 21:09:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2021-10-13 21:09:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 618 states have (on average 4.156957928802589) internal successors, (2569), 749 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2569 transitions. [2021-10-13 21:09:16,404 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2569 transitions. Word has length 2 [2021-10-13 21:09:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:16,405 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2569 transitions. [2021-10-13 21:09:16,405 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 21:09:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2569 transitions. [2021-10-13 21:09:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:09:16,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:16,405 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:09:16,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 21:09:16,620 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 21:09:16,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash 715142, now seen corresponding path program 1 times [2021-10-13 21:09:16,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:16,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585717545] [2021-10-13 21:09:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:16,623 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:16,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:16,624 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 21:09:16,625 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 21:09:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:16,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:09:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:16,996 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-13 21:09:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 521 treesize of output 530 [2021-10-13 21:09:22,258 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 21:09:22,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:22,274 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 21:09:22,274 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:22,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585717545] [2021-10-13 21:09:22,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585717545] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:22,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:22,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:22,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844392] [2021-10-13 21:09:22,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:22,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:22,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:22,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:22,277 INFO L87 Difference]: Start difference. First operand 750 states and 2569 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:22,548 INFO L93 Difference]: Finished difference Result 624 states and 2067 transitions. [2021-10-13 21:09:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:22,549 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 21:09:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:22,556 INFO L225 Difference]: With dead ends: 624 [2021-10-13 21:09:22,556 INFO L226 Difference]: Without dead ends: 624 [2021-10-13 21:09:22,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-10-13 21:09:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2021-10-13 21:09:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 520 states have (on average 3.975) internal successors, (2067), 623 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2067 transitions. [2021-10-13 21:09:22,593 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2067 transitions. Word has length 3 [2021-10-13 21:09:22,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:22,594 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2067 transitions. [2021-10-13 21:09:22,594 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 21:09:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2067 transitions. [2021-10-13 21:09:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:09:22,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:22,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:09:22,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:22,808 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 21:09:22,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash 715143, now seen corresponding path program 1 times [2021-10-13 21:09:22,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:22,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89007834] [2021-10-13 21:09:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:22,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:22,814 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 21:09:22,817 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 21:09:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:22,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:09:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:23,196 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-13 21:09:23,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 105 [2021-10-13 21:09:23,210 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 21:09:23,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 269 [2021-10-13 21:09:24,774 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 21:09:24,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:24,946 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 21:09:24,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:24,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89007834] [2021-10-13 21:09:24,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89007834] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:09:24,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:09:24,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2021-10-13 21:09:24,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78133737] [2021-10-13 21:09:24,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:24,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:24,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:24,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:09:24,950 INFO L87 Difference]: Start difference. First operand 624 states and 2067 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:25,127 INFO L93 Difference]: Finished difference Result 498 states and 1565 transitions. [2021-10-13 21:09:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:25,128 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 21:09:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:25,134 INFO L225 Difference]: With dead ends: 498 [2021-10-13 21:09:25,134 INFO L226 Difference]: Without dead ends: 498 [2021-10-13 21:09:25,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:09:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-10-13 21:09:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2021-10-13 21:09:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 422 states have (on average 3.7085308056872037) internal successors, (1565), 497 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1565 transitions. [2021-10-13 21:09:25,153 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1565 transitions. Word has length 3 [2021-10-13 21:09:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:25,154 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1565 transitions. [2021-10-13 21:09:25,154 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 21:09:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1565 transitions. [2021-10-13 21:09:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:09:25,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:25,154 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 21:09:25,172 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 21:09:25,367 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 21:09:25,368 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash 22169359, now seen corresponding path program 1 times [2021-10-13 21:09:25,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:25,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470029986] [2021-10-13 21:09:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:25,369 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:25,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:25,370 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 21:09:25,372 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 21:09:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:09:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:25,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:25,742 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:25,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:09:25,898 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 21:09:25,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:26,435 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 21:09:26,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:26,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470029986] [2021-10-13 21:09:26,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470029986] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:26,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:26,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:09:26,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011125877] [2021-10-13 21:09:26,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:26,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:26,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:26,438 INFO L87 Difference]: Start difference. First operand 498 states and 1565 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:28,289 INFO L93 Difference]: Finished difference Result 2474 states and 7805 transitions. [2021-10-13 21:09:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:09:28,290 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 21:09:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:28,313 INFO L225 Difference]: With dead ends: 2474 [2021-10-13 21:09:28,313 INFO L226 Difference]: Without dead ends: 2474 [2021-10-13 21:09:28,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 812.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-10-13 21:09:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 502. [2021-10-13 21:09:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 426 states have (on average 3.692488262910798) internal successors, (1573), 501 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1573 transitions. [2021-10-13 21:09:28,378 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1573 transitions. Word has length 4 [2021-10-13 21:09:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:28,379 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1573 transitions. [2021-10-13 21:09:28,379 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 21:09:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1573 transitions. [2021-10-13 21:09:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:09:28,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:28,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:09:28,399 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 21:09:28,591 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 21:09:28,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:28,596 INFO L82 PathProgramCache]: Analyzing trace with hash 687266745, now seen corresponding path program 1 times [2021-10-13 21:09:28,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:28,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738387520] [2021-10-13 21:09:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:28,597 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:28,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:28,598 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 21:09:28,603 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 21:09:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:09:28,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:28,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:28,978 INFO L354 Elim1Store]: treesize reduction 235, result has 20.6 percent of original size [2021-10-13 21:09:28,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 92 [2021-10-13 21:09:28,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 225 [2021-10-13 21:09:34,857 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 21:09:34,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:35,191 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 21:09:35,192 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:35,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738387520] [2021-10-13 21:09:35,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738387520] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:35,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:35,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:09:35,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055526997] [2021-10-13 21:09:35,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:35,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:35,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:35,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:35,194 INFO L87 Difference]: Start difference. First operand 502 states and 1573 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:35,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:35,875 INFO L93 Difference]: Finished difference Result 935 states and 2961 transitions. [2021-10-13 21:09:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:09:35,877 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 21:09:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:35,885 INFO L225 Difference]: With dead ends: 935 [2021-10-13 21:09:35,886 INFO L226 Difference]: Without dead ends: 935 [2021-10-13 21:09:35,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-10-13 21:09:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 472. [2021-10-13 21:09:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 408 states have (on average 3.6470588235294117) internal successors, (1488), 471 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1488 transitions. [2021-10-13 21:09:35,908 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1488 transitions. Word has length 5 [2021-10-13 21:09:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:35,908 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1488 transitions. [2021-10-13 21:09:35,908 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 21:09:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1488 transitions. [2021-10-13 21:09:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:09:35,909 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:35,909 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:09:35,924 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 21:09:36,124 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 21:09:36,125 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:36,126 INFO L82 PathProgramCache]: Analyzing trace with hash 687266746, now seen corresponding path program 1 times [2021-10-13 21:09:36,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:36,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508889699] [2021-10-13 21:09:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:36,128 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:36,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:36,128 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 21:09:36,129 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 21:09:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:36,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:09:36,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:36,406 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:09:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 166 treesize of output 207 [2021-10-13 21:09:41,798 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 21:09:41,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:41,822 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 21:09:41,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:41,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508889699] [2021-10-13 21:09:41,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508889699] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:41,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:41,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:41,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308793814] [2021-10-13 21:09:41,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:41,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:41,826 INFO L87 Difference]: Start difference. First operand 472 states and 1488 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:41,933 INFO L93 Difference]: Finished difference Result 442 states and 1403 transitions. [2021-10-13 21:09:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:41,934 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 21:09:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:41,938 INFO L225 Difference]: With dead ends: 442 [2021-10-13 21:09:41,938 INFO L226 Difference]: Without dead ends: 442 [2021-10-13 21:09:41,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-13 21:09:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-10-13 21:09:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 390 states have (on average 3.5974358974358975) internal successors, (1403), 441 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1403 transitions. [2021-10-13 21:09:41,955 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1403 transitions. Word has length 5 [2021-10-13 21:09:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:41,955 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1403 transitions. [2021-10-13 21:09:41,955 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 21:09:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1403 transitions. [2021-10-13 21:09:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:41,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:41,956 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:09:41,976 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 21:09:42,168 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 21:09:42,169 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:42,170 INFO L82 PathProgramCache]: Analyzing trace with hash -169572761, now seen corresponding path program 1 times [2021-10-13 21:09:42,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:42,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735423721] [2021-10-13 21:09:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:42,171 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:42,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:42,172 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 21:09:42,173 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 21:09:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:09:42,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:42,353 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 21:09:42,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:42,588 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 21:09:42,658 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 21:09:42,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:42,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735423721] [2021-10-13 21:09:42,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735423721] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:42,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:42,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:09:42,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670795088] [2021-10-13 21:09:42,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:09:42,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:09:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:42,660 INFO L87 Difference]: Start difference. First operand 442 states and 1403 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:43,409 INFO L93 Difference]: Finished difference Result 1451 states and 4609 transitions. [2021-10-13 21:09:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:09:43,409 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 21:09:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:43,419 INFO L225 Difference]: With dead ends: 1451 [2021-10-13 21:09:43,419 INFO L226 Difference]: Without dead ends: 1451 [2021-10-13 21:09:43,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:09:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-10-13 21:09:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 514. [2021-10-13 21:09:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 462 states have (on average 3.865800865800866) internal successors, (1786), 513 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1786 transitions. [2021-10-13 21:09:43,450 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1786 transitions. Word has length 6 [2021-10-13 21:09:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:43,450 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1786 transitions. [2021-10-13 21:09:43,450 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 21:09:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1786 transitions. [2021-10-13 21:09:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:43,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:43,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:09:43,464 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 21:09:43,663 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 21:09:43,664 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash -169572760, now seen corresponding path program 1 times [2021-10-13 21:09:43,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:43,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419133504] [2021-10-13 21:09:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:43,666 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:43,667 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 21:09:43,668 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 21:09:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:09:43,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:43,955 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:09:43,955 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 21:09:44,415 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 21:09:44,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:44,430 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 21:09:44,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:44,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419133504] [2021-10-13 21:09:44,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419133504] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:44,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:44,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 21:09:44,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437065439] [2021-10-13 21:09:44,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:44,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:44,433 INFO L87 Difference]: Start difference. First operand 514 states and 1786 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:44,546 INFO L93 Difference]: Finished difference Result 310 states and 1016 transitions. [2021-10-13 21:09:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:09:44,547 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 21:09:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:44,549 INFO L225 Difference]: With dead ends: 310 [2021-10-13 21:09:44,550 INFO L226 Difference]: Without dead ends: 310 [2021-10-13 21:09:44,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:09:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-13 21:09:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-10-13 21:09:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 289 states have (on average 3.5155709342560555) internal successors, (1016), 309 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1016 transitions. [2021-10-13 21:09:44,563 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1016 transitions. Word has length 6 [2021-10-13 21:09:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:44,567 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1016 transitions. [2021-10-13 21:09:44,567 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 21:09:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1016 transitions. [2021-10-13 21:09:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:09:44,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:44,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:44,582 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 21:09:44,779 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 21:09:44,780 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash -961784061, now seen corresponding path program 1 times [2021-10-13 21:09:44,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:44,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035862259] [2021-10-13 21:09:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:44,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:44,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:44,783 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 21:09:44,784 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 21:09:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:44,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:09:44,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:44,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:45,152 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:45,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:09:45,367 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 21:09:45,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:45,901 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 21:09:45,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:45,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035862259] [2021-10-13 21:09:45,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035862259] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:45,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:45,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:09:45,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885061387] [2021-10-13 21:09:45,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:09:45,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:09:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:45,903 INFO L87 Difference]: Start difference. First operand 310 states and 1016 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:46,980 INFO L93 Difference]: Finished difference Result 560 states and 1852 transitions. [2021-10-13 21:09:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:09:46,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:09:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:46,985 INFO L225 Difference]: With dead ends: 560 [2021-10-13 21:09:46,985 INFO L226 Difference]: Without dead ends: 560 [2021-10-13 21:09:46,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 885.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:09:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-10-13 21:09:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 460. [2021-10-13 21:09:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 439 states have (on average 3.662870159453303) internal successors, (1608), 459 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1608 transitions. [2021-10-13 21:09:47,003 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1608 transitions. Word has length 7 [2021-10-13 21:09:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:47,004 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1608 transitions. [2021-10-13 21:09:47,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1608 transitions. [2021-10-13 21:09:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:09:47,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:47,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:47,018 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 21:09:47,216 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 21:09:47,217 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:47,218 INFO L82 PathProgramCache]: Analyzing trace with hash -961603340, now seen corresponding path program 1 times [2021-10-13 21:09:47,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:47,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865928010] [2021-10-13 21:09:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:47,219 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:47,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:47,220 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 21:09:47,221 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 21:09:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:47,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:09:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:47,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:47,587 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:47,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:09:47,846 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 21:09:47,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:48,080 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 21:09:48,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:48,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865928010] [2021-10-13 21:09:48,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865928010] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:48,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:48,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:09:48,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350563261] [2021-10-13 21:09:48,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:48,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:48,085 INFO L87 Difference]: Start difference. First operand 460 states and 1608 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:48,385 INFO L93 Difference]: Finished difference Result 839 states and 2969 transitions. [2021-10-13 21:09:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:09:48,385 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 21:09:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:48,393 INFO L225 Difference]: With dead ends: 839 [2021-10-13 21:09:48,393 INFO L226 Difference]: Without dead ends: 839 [2021-10-13 21:09:48,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-10-13 21:09:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 424. [2021-10-13 21:09:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 409 states have (on average 3.647921760391198) internal successors, (1492), 423 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1492 transitions. [2021-10-13 21:09:48,414 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1492 transitions. Word has length 7 [2021-10-13 21:09:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:48,414 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1492 transitions. [2021-10-13 21:09:48,414 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 21:09:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1492 transitions. [2021-10-13 21:09:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:09:48,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:48,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:48,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-13 21:09:48,627 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 21:09:48,628 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:48,628 INFO L82 PathProgramCache]: Analyzing trace with hash -961603338, now seen corresponding path program 1 times [2021-10-13 21:09:48,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:48,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638144514] [2021-10-13 21:09:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:48,630 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:48,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:48,631 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 21:09:48,632 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 21:09:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:09:48,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:48,966 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-13 21:09:48,966 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 21:09:49,380 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 21:09:49,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:49,399 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 21:09:49,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:49,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638144514] [2021-10-13 21:09:49,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638144514] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:49,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:49,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:09:49,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799524977] [2021-10-13 21:09:49,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:09:49,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:49,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:09:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:49,402 INFO L87 Difference]: Start difference. First operand 424 states and 1492 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:49,460 INFO L93 Difference]: Finished difference Result 388 states and 1376 transitions. [2021-10-13 21:09:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:49,461 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 21:09:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:49,464 INFO L225 Difference]: With dead ends: 388 [2021-10-13 21:09:49,465 INFO L226 Difference]: Without dead ends: 388 [2021-10-13 21:09:49,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-10-13 21:09:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-10-13 21:09:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 379 states have (on average 3.6306068601583115) internal successors, (1376), 387 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1376 transitions. [2021-10-13 21:09:49,480 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1376 transitions. Word has length 7 [2021-10-13 21:09:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:49,480 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1376 transitions. [2021-10-13 21:09:49,480 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 21:09:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1376 transitions. [2021-10-13 21:09:49,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:09:49,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:49,482 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 21:09:49,498 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 21:09:49,697 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 21:09:49,697 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:09:49,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:49,699 INFO L82 PathProgramCache]: Analyzing trace with hash -138765873, now seen corresponding path program 2 times [2021-10-13 21:09:49,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:49,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980104599] [2021-10-13 21:09:49,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:09:49,700 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:49,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:49,701 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 21:09:49,710 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 21:09:49,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:09:49,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:09:49,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:09:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:49,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:50,062 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:50,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:09:50,353 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 21:09:50,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:51,940 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 21:09:51,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:51,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980104599] [2021-10-13 21:09:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980104599] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:51,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:51,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:09:51,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942665616] [2021-10-13 21:09:51,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:09:51,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:09:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:09:51,942 INFO L87 Difference]: Start difference. First operand 388 states and 1376 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:59,985 INFO L93 Difference]: Finished difference Result 4944 states and 17724 transitions. [2021-10-13 21:09:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:09:59,986 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 21:09:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:00,019 INFO L225 Difference]: With dead ends: 4944 [2021-10-13 21:10:00,019 INFO L226 Difference]: Without dead ends: 4944 [2021-10-13 21:10:00,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5821.8ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:10:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4944 states. [2021-10-13 21:10:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4944 to 396. [2021-10-13 21:10:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 387 states have (on average 3.5968992248062017) internal successors, (1392), 395 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1392 transitions. [2021-10-13 21:10:00,093 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1392 transitions. Word has length 8 [2021-10-13 21:10:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:00,093 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1392 transitions. [2021-10-13 21:10:00,093 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 21:10:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1392 transitions. [2021-10-13 21:10:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:10:00,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:00,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:00,116 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 21:10:00,316 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 21:10:00,316 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:10:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:00,317 INFO L82 PathProgramCache]: Analyzing trace with hash 255062330, now seen corresponding path program 1 times [2021-10-13 21:10:00,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:00,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424176695] [2021-10-13 21:10:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:10:00,318 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:00,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:00,323 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 21:10:00,361 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 21:10:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:10:00,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 21:10:00,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:00,629 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 21:10:00,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:00,976 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 21:10:01,101 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 21:10:01,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:01,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424176695] [2021-10-13 21:10:01,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424176695] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:01,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:01,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:10:01,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232680075] [2021-10-13 21:10:01,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:10:01,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:10:01,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:10:01,104 INFO L87 Difference]: Start difference. First operand 396 states and 1392 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:01,790 INFO L93 Difference]: Finished difference Result 1147 states and 4093 transitions. [2021-10-13 21:10:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:10:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 21:10:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:01,809 INFO L225 Difference]: With dead ends: 1147 [2021-10-13 21:10:01,809 INFO L226 Difference]: Without dead ends: 1147 [2021-10-13 21:10:01,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 599.1ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:10:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-10-13 21:10:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 484. [2021-10-13 21:10:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 475 states have (on average 3.8021052631578947) internal successors, (1806), 483 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1806 transitions. [2021-10-13 21:10:01,839 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1806 transitions. Word has length 8 [2021-10-13 21:10:01,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:01,839 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1806 transitions. [2021-10-13 21:10:01,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:01,840 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1806 transitions. [2021-10-13 21:10:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:10:01,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:01,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:01,856 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 21:10:02,056 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 21:10:02,057 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:10:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash -682999256, now seen corresponding path program 1 times [2021-10-13 21:10:02,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:02,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078038588] [2021-10-13 21:10:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:10:02,058 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:02,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:02,060 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 21:10:02,066 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 21:10:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:10:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:10:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:02,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:02,472 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:02,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:10:02,848 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 21:10:02,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:03,348 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 21:10:03,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:03,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078038588] [2021-10-13 21:10:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078038588] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:03,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:03,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:10:03,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898249833] [2021-10-13 21:10:03,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:10:03,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:10:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:10:03,356 INFO L87 Difference]: Start difference. First operand 484 states and 1806 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:04,778 INFO L93 Difference]: Finished difference Result 1042 states and 3816 transitions. [2021-10-13 21:10:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:10:04,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 21:10:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:04,784 INFO L225 Difference]: With dead ends: 1042 [2021-10-13 21:10:04,784 INFO L226 Difference]: Without dead ends: 1042 [2021-10-13 21:10:04,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 929.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:10:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-10-13 21:10:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 748. [2021-10-13 21:10:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 739 states have (on average 4.124492557510149) internal successors, (3048), 747 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 3048 transitions. [2021-10-13 21:10:04,814 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 3048 transitions. Word has length 9 [2021-10-13 21:10:04,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:04,814 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 3048 transitions. [2021-10-13 21:10:04,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 3048 transitions. [2021-10-13 21:10:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:10:04,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:04,815 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:04,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:05,028 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 21:10:05,028 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:10:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:05,030 INFO L82 PathProgramCache]: Analyzing trace with hash -777925273, now seen corresponding path program 2 times [2021-10-13 21:10:05,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:05,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776733717] [2021-10-13 21:10:05,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:10:05,030 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:05,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:05,033 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 21:10:05,041 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 21:10:05,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:10:05,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 21:10:05,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:05,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:05,586 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:05,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:10:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:06,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:07,585 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:07,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776733717] [2021-10-13 21:10:07,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776733717] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:07,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:07,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-13 21:10:07,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724084385] [2021-10-13 21:10:07,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:10:07,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:07,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:10:07,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:10:07,587 INFO L87 Difference]: Start difference. First operand 748 states and 3048 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:18,430 INFO L93 Difference]: Finished difference Result 2432 states and 9316 transitions. [2021-10-13 21:10:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 21:10:18,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:10:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:18,445 INFO L225 Difference]: With dead ends: 2432 [2021-10-13 21:10:18,445 INFO L226 Difference]: Without dead ends: 2432 [2021-10-13 21:10:18,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5345.9ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-10-13 21:10:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-10-13 21:10:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1242. [2021-10-13 21:10:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1233 states have (on average 4.077858880778589) internal successors, (5028), 1241 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5028 transitions. [2021-10-13 21:10:18,535 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5028 transitions. Word has length 10 [2021-10-13 21:10:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:18,536 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 5028 transitions. [2021-10-13 21:10:18,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5028 transitions. [2021-10-13 21:10:18,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:10:18,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:18,539 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:18,553 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 21:10:18,752 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 21:10:18,753 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:10:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash 307293158, now seen corresponding path program 1 times [2021-10-13 21:10:18,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:18,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426448982] [2021-10-13 21:10:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:10:18,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:18,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:18,757 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 21:10:18,758 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 21:10:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:10:18,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:10:18,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:19,157 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:19,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:10:19,474 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 21:10:19,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:20,336 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 21:10:20,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:20,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426448982] [2021-10-13 21:10:20,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426448982] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:20,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:20,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:10:20,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293038010] [2021-10-13 21:10:20,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:10:20,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:20,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:10:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:10:20,338 INFO L87 Difference]: Start difference. First operand 1242 states and 5028 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:23,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:23,477 INFO L93 Difference]: Finished difference Result 2372 states and 9590 transitions. [2021-10-13 21:10:23,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 21:10:23,478 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 21:10:23,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:23,492 INFO L225 Difference]: With dead ends: 2372 [2021-10-13 21:10:23,492 INFO L226 Difference]: Without dead ends: 2372 [2021-10-13 21:10:23,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2088.5ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:10:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-10-13 21:10:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1760. [2021-10-13 21:10:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1751 states have (on average 4.138206739006282) internal successors, (7246), 1759 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 7246 transitions. [2021-10-13 21:10:23,571 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 7246 transitions. Word has length 10 [2021-10-13 21:10:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:23,571 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 7246 transitions. [2021-10-13 21:10:23,572 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 21:10:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 7246 transitions. [2021-10-13 21:10:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 21:10:23,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:23,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:23,590 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 21:10:23,787 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 21:10:23,787 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:10:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash 936156681, now seen corresponding path program 1 times [2021-10-13 21:10:23,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:23,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577303745] [2021-10-13 21:10:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:10:23,789 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:23,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:23,794 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 21:10:23,799 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 21:10:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:10:24,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:10:24,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:24,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:24,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:24,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577303745] [2021-10-13 21:10:24,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577303745] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:24,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:24,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 21:10:24,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779298635] [2021-10-13 21:10:24,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:10:24,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:24,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:10:24,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:10:24,550 INFO L87 Difference]: Start difference. First operand 1760 states and 7246 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:25,457 INFO L93 Difference]: Finished difference Result 1782 states and 7190 transitions. [2021-10-13 21:10:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 21:10:25,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 21:10:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:25,468 INFO L225 Difference]: With dead ends: 1782 [2021-10-13 21:10:25,469 INFO L226 Difference]: Without dead ends: 1782 [2021-10-13 21:10:25,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 478.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:10:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-13 21:10:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1746. [2021-10-13 21:10:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1737 states have (on average 4.095567069660334) internal successors, (7114), 1745 states have internal predecessors, (7114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 7114 transitions. [2021-10-13 21:10:25,535 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 7114 transitions. Word has length 11 [2021-10-13 21:10:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:25,536 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 7114 transitions. [2021-10-13 21:10:25,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 7114 transitions. [2021-10-13 21:10:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:10:25,537 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:25,537 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2021-10-13 21:10:25,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:25,751 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 21:10:25,751 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:10:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:25,752 INFO L82 PathProgramCache]: Analyzing trace with hash -290420488, now seen corresponding path program 3 times [2021-10-13 21:10:25,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:25,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118158227] [2021-10-13 21:10:25,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:10:25,753 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:25,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:25,756 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 21:10:25,801 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 21:10:26,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 21:10:26,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:26,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 21:10:26,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:26,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:26,482 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:26,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:10:26,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-13 21:10:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:26,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:26,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:26,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2021-10-13 21:10:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:27,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:27,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-13 21:10:27,246 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 21:10:27,249 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 21:10:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:29,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:29,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118158227] [2021-10-13 21:10:29,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118158227] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:29,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:29,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-10-13 21:10:29,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537892451] [2021-10-13 21:10:29,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 21:10:29,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 21:10:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-10-13 21:10:29,390 INFO L87 Difference]: Start difference. First operand 1746 states and 7114 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:43,311 INFO L93 Difference]: Finished difference Result 5006 states and 19410 transitions. [2021-10-13 21:10:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:10:43,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:10:43,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:43,339 INFO L225 Difference]: With dead ends: 5006 [2021-10-13 21:10:43,339 INFO L226 Difference]: Without dead ends: 5006 [2021-10-13 21:10:43,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 7507.9ms TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 21:10:43,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-10-13 21:10:43,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 2714. [2021-10-13 21:10:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2705 states have (on average 4.269870609981516) internal successors, (11550), 2713 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 11550 transitions. [2021-10-13 21:10:43,494 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 11550 transitions. Word has length 12 [2021-10-13 21:10:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:43,494 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 11550 transitions. [2021-10-13 21:10:43,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 11550 transitions. [2021-10-13 21:10:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:10:43,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:43,496 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:43,513 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 21:10:43,712 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 21:10:43,712 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:10:43,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:43,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1008388354, now seen corresponding path program 2 times [2021-10-13 21:10:43,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:43,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680849246] [2021-10-13 21:10:43,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:10:43,715 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:43,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:43,716 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 21:10:43,718 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 21:10:44,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:10:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:44,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:10:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:44,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:44,324 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:44,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:10:44,838 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 21:10:44,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:46,735 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 21:10:46,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:46,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680849246] [2021-10-13 21:10:46,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680849246] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:46,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:46,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 21:10:46,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172942909] [2021-10-13 21:10:46,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:10:46,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:46,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:10:46,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:10:46,737 INFO L87 Difference]: Start difference. First operand 2714 states and 11550 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:55,137 INFO L93 Difference]: Finished difference Result 4687 states and 19987 transitions. [2021-10-13 21:10:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 21:10:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:10:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:55,158 INFO L225 Difference]: With dead ends: 4687 [2021-10-13 21:10:55,158 INFO L226 Difference]: Without dead ends: 4687 [2021-10-13 21:10:55,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 6094.0ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-10-13 21:10:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2021-10-13 21:10:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3609. [2021-10-13 21:10:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3600 states have (on average 4.448611111111111) internal successors, (16015), 3608 states have internal predecessors, (16015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 16015 transitions. [2021-10-13 21:10:55,577 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 16015 transitions. Word has length 12 [2021-10-13 21:10:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:55,580 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 16015 transitions. [2021-10-13 21:10:55,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 16015 transitions. [2021-10-13 21:10:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:10:55,582 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:55,582 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:55,612 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 21:10:55,802 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 21:10:55,802 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:10:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:55,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1967670086, now seen corresponding path program 2 times [2021-10-13 21:10:55,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:55,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117341123] [2021-10-13 21:10:55,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:10:55,805 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:55,806 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 21:10:55,812 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 21:10:56,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:10:56,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:56,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 21:10:56,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:56,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:56,460 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:56,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:10:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:57,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:58,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:58,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117341123] [2021-10-13 21:10:58,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117341123] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:58,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:58,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-13 21:10:58,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482468843] [2021-10-13 21:10:58,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:10:58,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:10:58,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:10:58,684 INFO L87 Difference]: Start difference. First operand 3609 states and 16015 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:11:13,406 INFO L93 Difference]: Finished difference Result 4989 states and 20926 transitions. [2021-10-13 21:11:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 21:11:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:11:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:11:13,423 INFO L225 Difference]: With dead ends: 4989 [2021-10-13 21:11:13,423 INFO L226 Difference]: Without dead ends: 4989 [2021-10-13 21:11:13,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6405.4ms TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-10-13 21:11:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2021-10-13 21:11:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 3673. [2021-10-13 21:11:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3664 states have (on average 4.487445414847161) internal successors, (16442), 3672 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 16442 transitions. [2021-10-13 21:11:13,611 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 16442 transitions. Word has length 12 [2021-10-13 21:11:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:11:13,611 INFO L470 AbstractCegarLoop]: Abstraction has 3673 states and 16442 transitions. [2021-10-13 21:11:13,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 16442 transitions. [2021-10-13 21:11:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:11:13,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:11:13,616 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-13 21:11:13,638 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 21:11:13,817 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 21:11:13,817 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:11:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:11:13,818 INFO L82 PathProgramCache]: Analyzing trace with hash -581246862, now seen corresponding path program 4 times [2021-10-13 21:11:13,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:11:13,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201574047] [2021-10-13 21:11:13,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:11:13,820 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:11:13,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:11:13,821 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 21:11:13,822 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 21:11:14,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:11:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:11:14,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:11:14,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:11:14,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:11:14,356 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:11:14,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:11:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:14,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:11:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:17,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:11:17,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201574047] [2021-10-13 21:11:17,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201574047] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:11:17,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:11:17,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-13 21:11:17,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530314077] [2021-10-13 21:11:17,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 21:11:17,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:11:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 21:11:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-13 21:11:17,399 INFO L87 Difference]: Start difference. First operand 3673 states and 16442 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:45,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:11:45,140 INFO L93 Difference]: Finished difference Result 6327 states and 26761 transitions. [2021-10-13 21:11:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 21:11:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 21:11:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:11:45,165 INFO L225 Difference]: With dead ends: 6327 [2021-10-13 21:11:45,165 INFO L226 Difference]: Without dead ends: 6327 [2021-10-13 21:11:45,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 13772.6ms TimeCoverageRelationStatistics Valid=528, Invalid=2334, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 21:11:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2021-10-13 21:11:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 3764. [2021-10-13 21:11:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3755 states have (on average 4.384287616511318) internal successors, (16463), 3763 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 16463 transitions. [2021-10-13 21:11:45,343 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 16463 transitions. Word has length 13 [2021-10-13 21:11:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:11:45,343 INFO L470 AbstractCegarLoop]: Abstraction has 3764 states and 16463 transitions. [2021-10-13 21:11:45,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 16463 transitions. [2021-10-13 21:11:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:11:45,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:11:45,346 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:11:45,368 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 21:11:45,561 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 21:11:45,562 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:11:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:11:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash 503971569, now seen corresponding path program 2 times [2021-10-13 21:11:45,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:11:45,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930517583] [2021-10-13 21:11:45,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:11:45,564 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:11:45,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:11:45,565 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 21:11:45,567 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 21:11:45,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:11:45,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:11:45,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:11:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:11:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:11:46,100 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:11:46,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:11:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:11:46,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:11:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:11:47,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:11:47,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930517583] [2021-10-13 21:11:47,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930517583] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:11:47,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:11:47,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:11:47,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126900253] [2021-10-13 21:11:47,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:11:47,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:11:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:11:47,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:11:47,473 INFO L87 Difference]: Start difference. First operand 3764 states and 16463 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:11:48,060 INFO L93 Difference]: Finished difference Result 4358 states and 18668 transitions. [2021-10-13 21:11:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 21:11:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 21:11:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:11:48,113 INFO L225 Difference]: With dead ends: 4358 [2021-10-13 21:11:48,114 INFO L226 Difference]: Without dead ends: 4358 [2021-10-13 21:11:48,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 597.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:11:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-10-13 21:11:48,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 2901. [2021-10-13 21:11:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2892 states have (on average 4.200553250345782) internal successors, (12148), 2900 states have internal predecessors, (12148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 12148 transitions. [2021-10-13 21:11:48,186 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 12148 transitions. Word has length 13 [2021-10-13 21:11:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:11:48,186 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 12148 transitions. [2021-10-13 21:11:48,186 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 21:11:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 12148 transitions. [2021-10-13 21:11:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 21:11:48,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:11:48,189 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2021-10-13 21:11:48,208 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 21:11:48,402 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 21:11:48,403 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:11:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:11:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash -810101177, now seen corresponding path program 5 times [2021-10-13 21:11:48,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:11:48,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856735472] [2021-10-13 21:11:48,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:11:48,404 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:11:48,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:11:48,405 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 21:11:48,406 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 21:11:48,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 21:11:48,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:11:48,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:11:48,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:11:48,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:11:49,059 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:11:49,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:11:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:11:49,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:11:50,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-13 21:11:50,053 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 21:11:50,058 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 21:11:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:53,024 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:11:53,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856735472] [2021-10-13 21:11:53,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856735472] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:11:53,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:11:53,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2021-10-13 21:11:53,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097942536] [2021-10-13 21:11:53,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 21:11:53,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:11:53,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 21:11:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-10-13 21:11:53,026 INFO L87 Difference]: Start difference. First operand 2901 states and 12148 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:12:00,059 INFO L93 Difference]: Finished difference Result 4199 states and 16727 transitions. [2021-10-13 21:12:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 21:12:00,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 21:12:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:12:00,073 INFO L225 Difference]: With dead ends: 4199 [2021-10-13 21:12:00,073 INFO L226 Difference]: Without dead ends: 4199 [2021-10-13 21:12:00,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5231.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 21:12:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-10-13 21:12:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3039. [2021-10-13 21:12:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 3030 states have (on average 4.238283828382838) internal successors, (12842), 3038 states have internal predecessors, (12842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 12842 transitions. [2021-10-13 21:12:00,206 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 12842 transitions. Word has length 14 [2021-10-13 21:12:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:12:00,210 INFO L470 AbstractCegarLoop]: Abstraction has 3039 states and 12842 transitions. [2021-10-13 21:12:00,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 12842 transitions. [2021-10-13 21:12:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 21:12:00,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:12:00,216 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:12:00,237 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 21:12:00,430 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 21:12:00,431 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:12:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:12:00,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1592269402, now seen corresponding path program 3 times [2021-10-13 21:12:00,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:12:00,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109182677] [2021-10-13 21:12:00,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:12:00,433 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:12:00,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:12:00,438 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 21:12:00,448 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 21:12:00,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:12:00,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:12:00,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:12:00,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:12:00,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:12:01,193 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:12:01,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:12:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:12:01,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:12:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:12:03,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:12:03,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109182677] [2021-10-13 21:12:03,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109182677] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:12:03,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:12:03,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 21:12:03,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470722233] [2021-10-13 21:12:03,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:12:03,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:12:03,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:12:03,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:12:03,960 INFO L87 Difference]: Start difference. First operand 3039 states and 12842 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:12:05,274 INFO L93 Difference]: Finished difference Result 3187 states and 13157 transitions. [2021-10-13 21:12:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 21:12:05,276 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 21:12:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:12:05,286 INFO L225 Difference]: With dead ends: 3187 [2021-10-13 21:12:05,286 INFO L226 Difference]: Without dead ends: 3187 [2021-10-13 21:12:05,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1256.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:12:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-10-13 21:12:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2077. [2021-10-13 21:12:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2072 states have (on average 4.056467181467181) internal successors, (8405), 2076 states have internal predecessors, (8405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 8405 transitions. [2021-10-13 21:12:05,353 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 8405 transitions. Word has length 14 [2021-10-13 21:12:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:12:05,353 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 8405 transitions. [2021-10-13 21:12:05,353 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 21:12:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 8405 transitions. [2021-10-13 21:12:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 21:12:05,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:12:05,356 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:12:05,369 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 21:12:05,558 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 21:12:05,559 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:12:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:12:05,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1265232291, now seen corresponding path program 3 times [2021-10-13 21:12:05,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:12:05,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856907656] [2021-10-13 21:12:05,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:12:05,561 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:12:05,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:12:05,562 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 21:12:05,564 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 21:12:06,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 21:12:06,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:12:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 21:12:06,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:12:06,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:12:06,284 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:12:06,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:12:06,415 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 21:12:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:12:06,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:12:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:12:07,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:12:07,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856907656] [2021-10-13 21:12:07,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856907656] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:12:07,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:12:07,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-13 21:12:07,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990083272] [2021-10-13 21:12:07,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:12:07,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:12:07,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:12:07,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:12:07,095 INFO L87 Difference]: Start difference. First operand 2077 states and 8405 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:12:10,054 INFO L93 Difference]: Finished difference Result 2223 states and 8663 transitions. [2021-10-13 21:12:10,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 21:12:10,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 21:12:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:12:10,063 INFO L225 Difference]: With dead ends: 2223 [2021-10-13 21:12:10,063 INFO L226 Difference]: Without dead ends: 2223 [2021-10-13 21:12:10,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1556.3ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-10-13 21:12:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-10-13 21:12:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 2091. [2021-10-13 21:12:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2091 states, 2086 states have (on average 4.017737296260786) internal successors, (8381), 2090 states have internal predecessors, (8381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 8381 transitions. [2021-10-13 21:12:10,120 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 8381 transitions. Word has length 14 [2021-10-13 21:12:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:12:10,121 INFO L470 AbstractCegarLoop]: Abstraction has 2091 states and 8381 transitions. [2021-10-13 21:12:10,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 8381 transitions. [2021-10-13 21:12:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 21:12:10,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:12:10,124 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:12:10,143 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 21:12:10,337 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 21:12:10,338 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:12:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:12:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1938278139, now seen corresponding path program 4 times [2021-10-13 21:12:10,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:12:10,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870776865] [2021-10-13 21:12:10,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:12:10,340 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:12:10,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:12:10,341 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 21:12:10,347 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 21:12:10,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:12:10,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:12:10,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 21:12:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:12:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:12:10,935 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:12:10,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:12:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:12:11,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:12:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:12:14,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:12:14,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870776865] [2021-10-13 21:12:14,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870776865] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:12:14,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:12:14,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-13 21:12:14,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719137880] [2021-10-13 21:12:14,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 21:12:14,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:12:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 21:12:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-13 21:12:14,140 INFO L87 Difference]: Start difference. First operand 2091 states and 8381 transitions. Second operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:12:38,817 INFO L93 Difference]: Finished difference Result 4349 states and 16239 transitions. [2021-10-13 21:12:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 21:12:38,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 21:12:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:12:38,835 INFO L225 Difference]: With dead ends: 4349 [2021-10-13 21:12:38,835 INFO L226 Difference]: Without dead ends: 4349 [2021-10-13 21:12:38,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 13142.8ms TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 21:12:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-10-13 21:12:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 2961. [2021-10-13 21:12:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2956 states have (on average 4.25) internal successors, (12563), 2960 states have internal predecessors, (12563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 12563 transitions. [2021-10-13 21:12:38,965 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 12563 transitions. Word has length 15 [2021-10-13 21:12:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:12:38,966 INFO L470 AbstractCegarLoop]: Abstraction has 2961 states and 12563 transitions. [2021-10-13 21:12:38,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 12563 transitions. [2021-10-13 21:12:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 21:12:38,969 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:12:38,969 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:12:38,989 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 21:12:39,182 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 21:12:39,182 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:12:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:12:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash -687481528, now seen corresponding path program 5 times [2021-10-13 21:12:39,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:12:39,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313444290] [2021-10-13 21:12:39,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:12:39,185 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:12:39,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:12:39,186 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 21:12:39,187 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 21:12:39,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 21:12:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:12:39,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 21:12:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:12:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:12:39,854 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:12:39,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:12:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:12:40,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:12:40,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-13 21:12:40,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:12:40,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:12:40,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:12:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:12:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:12:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:12:40,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2021-10-13 21:12:40,940 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 21:12:43,773 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 21:12:43,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:12:43,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313444290] [2021-10-13 21:12:43,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313444290] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:12:43,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:12:43,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-10-13 21:12:43,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601214201] [2021-10-13 21:12:43,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 21:12:43,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:12:43,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 21:12:43,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:12:43,775 INFO L87 Difference]: Start difference. First operand 2961 states and 12563 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:12:50,311 INFO L93 Difference]: Finished difference Result 3583 states and 13903 transitions. [2021-10-13 21:12:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 21:12:50,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 21:12:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:12:50,325 INFO L225 Difference]: With dead ends: 3583 [2021-10-13 21:12:50,325 INFO L226 Difference]: Without dead ends: 3583 [2021-10-13 21:12:50,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4697.4ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 21:12:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-10-13 21:12:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 2807. [2021-10-13 21:12:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2802 states have (on average 4.210920770877944) internal successors, (11799), 2806 states have internal predecessors, (11799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 11799 transitions. [2021-10-13 21:12:50,412 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 11799 transitions. Word has length 15 [2021-10-13 21:12:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:12:50,413 INFO L470 AbstractCegarLoop]: Abstraction has 2807 states and 11799 transitions. [2021-10-13 21:12:50,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 11799 transitions. [2021-10-13 21:12:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:12:50,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:12:50,456 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-13 21:12:50,473 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 21:12:50,665 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 21:12:50,666 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:12:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:12:50,666 INFO L82 PathProgramCache]: Analyzing trace with hash 897916751, now seen corresponding path program 3 times [2021-10-13 21:12:50,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:12:50,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786151534] [2021-10-13 21:12:50,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:12:50,668 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:12:50,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:12:50,669 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 21:12:50,671 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 21:12:51,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 21:12:51,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:12:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:12:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:12:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:12:51,485 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:12:51,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:12:52,268 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 21:12:52,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:12:57,845 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 21:12:57,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:12:57,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786151534] [2021-10-13 21:12:57,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786151534] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:12:57,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:12:57,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 21:12:57,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968035411] [2021-10-13 21:12:57,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 21:12:57,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:12:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 21:12:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 21:12:57,848 INFO L87 Difference]: Start difference. First operand 2807 states and 11799 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:13:10,976 WARN L207 SmtUtils]: Spent 9.96 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 21:13:19,728 WARN L207 SmtUtils]: Spent 7.86 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 21:13:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:13:57,014 INFO L93 Difference]: Finished difference Result 55766 states and 247472 transitions. [2021-10-13 21:13:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 21:13:57,016 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 21:13:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:13:57,871 INFO L225 Difference]: With dead ends: 55766 [2021-10-13 21:13:57,874 INFO L226 Difference]: Without dead ends: 55766 [2021-10-13 21:13:57,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 51014.9ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 21:13:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55766 states. [2021-10-13 21:13:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55766 to 2823. [2021-10-13 21:13:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2818 states have (on average 4.198367636621717) internal successors, (11831), 2822 states have internal predecessors, (11831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:13:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 11831 transitions. [2021-10-13 21:13:59,139 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 11831 transitions. Word has length 16 [2021-10-13 21:13:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:13:59,139 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 11831 transitions. [2021-10-13 21:13:59,140 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 21:13:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 11831 transitions. [2021-10-13 21:13:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 21:13:59,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:13:59,144 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2021-10-13 21:13:59,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-13 21:13:59,358 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 21:13:59,358 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:13:59,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:13:59,359 INFO L82 PathProgramCache]: Analyzing trace with hash 504727218, now seen corresponding path program 6 times [2021-10-13 21:13:59,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:13:59,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626925833] [2021-10-13 21:13:59,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:13:59,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:13:59,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:13:59,362 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 21:13:59,404 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 21:14:00,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 21:14:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:14:00,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 21:14:00,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:14:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:14:00,440 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:14:00,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:14:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:14:01,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:14:01,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-13 21:14:01,895 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 21:14:01,899 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 21:14:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:14:08,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:14:08,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626925833] [2021-10-13 21:14:08,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626925833] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:14:08,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:14:08,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 33 [2021-10-13 21:14:08,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325366803] [2021-10-13 21:14:08,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 21:14:08,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:14:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 21:14:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:14:08,502 INFO L87 Difference]: Start difference. First operand 2823 states and 11831 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:14:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:14:45,004 INFO L93 Difference]: Finished difference Result 8749 states and 34613 transitions. [2021-10-13 21:14:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-13 21:14:45,007 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 21:14:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:14:45,042 INFO L225 Difference]: With dead ends: 8749 [2021-10-13 21:14:45,042 INFO L226 Difference]: Without dead ends: 8749 [2021-10-13 21:14:45,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 22058.7ms TimeCoverageRelationStatistics Valid=943, Invalid=4027, Unknown=0, NotChecked=0, Total=4970 [2021-10-13 21:14:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8749 states. [2021-10-13 21:14:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8749 to 4517. [2021-10-13 21:14:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4512 states have (on average 4.190602836879433) internal successors, (18908), 4516 states have internal predecessors, (18908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:14:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 18908 transitions. [2021-10-13 21:14:45,245 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 18908 transitions. Word has length 19 [2021-10-13 21:14:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:14:45,247 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 18908 transitions. [2021-10-13 21:14:45,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:14:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 18908 transitions. [2021-10-13 21:14:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:14:45,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:14:45,255 INFO L512 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1] [2021-10-13 21:14:45,273 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 21:14:45,469 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 21:14:45,469 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:14:45,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:14:45,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1728640317, now seen corresponding path program 7 times [2021-10-13 21:14:45,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:14:45,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35248606] [2021-10-13 21:14:45,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:14:45,472 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:14:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:14:45,473 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 21:14:45,507 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 21:14:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:14:45,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 21:14:45,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:14:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:14:46,124 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:14:46,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:14:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:14:47,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:14:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:14:53,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:14:53,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35248606] [2021-10-13 21:14:53,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35248606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:14:53,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:14:53,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 36 [2021-10-13 21:14:53,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614709559] [2021-10-13 21:14:53,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 21:14:53,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:14:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 21:14:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 21:14:53,071 INFO L87 Difference]: Start difference. First operand 4517 states and 18908 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:15:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:15:39,371 INFO L93 Difference]: Finished difference Result 10542 states and 41812 transitions. [2021-10-13 21:15:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-13 21:15:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 21:15:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:15:39,409 INFO L225 Difference]: With dead ends: 10542 [2021-10-13 21:15:39,410 INFO L226 Difference]: Without dead ends: 10542 [2021-10-13 21:15:39,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2183 ImplicationChecksByTransitivity, 25948.5ms TimeCoverageRelationStatistics Valid=1733, Invalid=7579, Unknown=0, NotChecked=0, Total=9312 [2021-10-13 21:15:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10542 states. [2021-10-13 21:15:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10542 to 5492. [2021-10-13 21:15:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5487 states have (on average 4.227264443229451) internal successors, (23195), 5491 states have internal predecessors, (23195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:15:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 23195 transitions. [2021-10-13 21:15:39,640 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 23195 transitions. Word has length 21 [2021-10-13 21:15:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:15:39,640 INFO L470 AbstractCegarLoop]: Abstraction has 5492 states and 23195 transitions. [2021-10-13 21:15:39,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:15:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 23195 transitions. [2021-10-13 21:15:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:15:39,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:15:39,649 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:15:39,669 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 21:15:39,862 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 21:15:39,863 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:15:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:15:39,864 INFO L82 PathProgramCache]: Analyzing trace with hash 50396677, now seen corresponding path program 6 times [2021-10-13 21:15:39,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:15:39,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131156372] [2021-10-13 21:15:39,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:15:39,866 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:15:39,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:15:39,867 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 21:15:39,868 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 21:15:40,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 21:15:40,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:15:40,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 21:15:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:15:40,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:15:40,975 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:15:40,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:15:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 21:15:44,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:15:46,370 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-13 21:15:46,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 124 [2021-10-13 21:15:46,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-13 21:15:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 21:15:56,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:15:56,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131156372] [2021-10-13 21:15:56,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131156372] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:15:56,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:15:56,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-13 21:15:56,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635501473] [2021-10-13 21:15:56,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 21:15:56,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:15:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 21:15:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=378, Unknown=1, NotChecked=0, Total=462 [2021-10-13 21:15:56,172 INFO L87 Difference]: Start difference. First operand 5492 states and 23195 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:16:04,854 WARN L207 SmtUtils]: Spent 6.03 s on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-10-13 21:16:12,988 WARN L207 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-10-13 21:17:00,926 WARN L207 SmtUtils]: Spent 6.73 s on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-10-13 21:17:13,457 WARN L207 SmtUtils]: Spent 5.63 s on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-10-13 21:17:44,341 WARN L207 SmtUtils]: Spent 15.06 s on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2021-10-13 21:18:00,590 WARN L207 SmtUtils]: Spent 6.56 s on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2021-10-13 21:18:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:18:44,082 INFO L93 Difference]: Finished difference Result 6662 states and 25678 transitions. [2021-10-13 21:18:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 21:18:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 21:18:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:18:44,105 INFO L225 Difference]: With dead ends: 6662 [2021-10-13 21:18:44,105 INFO L226 Difference]: Without dead ends: 6662 [2021-10-13 21:18:44,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 88546.2ms TimeCoverageRelationStatistics Valid=415, Invalid=1654, Unknown=1, NotChecked=0, Total=2070 [2021-10-13 21:18:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2021-10-13 21:18:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 5200. [2021-10-13 21:18:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5200 states, 5195 states have (on average 4.2055822906641005) internal successors, (21848), 5199 states have internal predecessors, (21848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:18:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 21848 transitions. [2021-10-13 21:18:44,303 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 21848 transitions. Word has length 21 [2021-10-13 21:18:44,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:18:44,303 INFO L470 AbstractCegarLoop]: Abstraction has 5200 states and 21848 transitions. [2021-10-13 21:18:44,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:18:44,304 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 21848 transitions. [2021-10-13 21:18:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:18:44,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:18:44,312 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:18:44,327 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 21:18:44,522 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 21:18:44,523 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:18:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:18:44,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1709528902, now seen corresponding path program 7 times [2021-10-13 21:18:44,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:18:44,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031877175] [2021-10-13 21:18:44,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:18:44,526 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:18:44,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:18:44,527 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 21:18:44,528 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 21:18:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:18:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 21:18:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:18:44,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:18:45,524 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:18:45,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:18:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:18:47,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:18:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:18:55,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:18:55,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031877175] [2021-10-13 21:18:55,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031877175] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:18:55,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:18:55,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-13 21:18:55,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858044366] [2021-10-13 21:18:55,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 21:18:55,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:18:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 21:18:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 21:18:55,910 INFO L87 Difference]: Start difference. First operand 5200 states and 21848 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:21:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:21:18,872 INFO L93 Difference]: Finished difference Result 10855 states and 40085 transitions. [2021-10-13 21:21:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-13 21:21:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 21:21:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:21:18,907 INFO L225 Difference]: With dead ends: 10855 [2021-10-13 21:21:18,907 INFO L226 Difference]: Without dead ends: 10855 [2021-10-13 21:21:18,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2243 ImplicationChecksByTransitivity, 69644.1ms TimeCoverageRelationStatistics Valid=1912, Invalid=7594, Unknown=0, NotChecked=0, Total=9506 [2021-10-13 21:21:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-10-13 21:21:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 4983. [2021-10-13 21:21:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4983 states, 4978 states have (on average 4.169345118521495) internal successors, (20755), 4982 states have internal predecessors, (20755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:21:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4983 states to 4983 states and 20755 transitions. [2021-10-13 21:21:19,069 INFO L78 Accepts]: Start accepts. Automaton has 4983 states and 20755 transitions. Word has length 22 [2021-10-13 21:21:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:21:19,070 INFO L470 AbstractCegarLoop]: Abstraction has 4983 states and 20755 transitions. [2021-10-13 21:21:19,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:21:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4983 states and 20755 transitions. [2021-10-13 21:21:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 21:21:19,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:21:19,076 INFO L512 BasicCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1] [2021-10-13 21:21:19,089 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 21:21:19,282 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 21:21:19,282 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-13 21:21:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:21:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash -771356142, now seen corresponding path program 8 times [2021-10-13 21:21:19,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:21:19,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505666883] [2021-10-13 21:21:19,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:21:19,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:21:19,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:21:19,286 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 21:21:19,287 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 21:21:19,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:21:19,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:21:19,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 21:21:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:21:19,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:21:20,359 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:21:20,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-13 21:21:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:21:23,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:21:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:21:36,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:21:36,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505666883] [2021-10-13 21:21:36,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505666883] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:21:36,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:21:36,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2021-10-13 21:21:36,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708257527] [2021-10-13 21:21:36,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 21:21:36,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:21:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 21:21:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1464, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 21:21:36,034 INFO L87 Difference]: Start difference. First operand 4983 states and 20755 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-10-13 21:22:44,239 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:22:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-13 21:22:44,249 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:22:44,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-10-13 21:22:44,275 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 21:22:44,449 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 21:22:44,450 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. [2021-10-13 21:22:44,452 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:22:44,453 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:22:44,453 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 21:22:44,453 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 21:22:44,453 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:22:44,454 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:22:44,454 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:22:44,454 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:22:44,454 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 21:22:44,454 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 21:22:44,454 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-13 21:22:44,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-13 21:22:44,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 21:22:44,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 21:22:44,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 21:22:44,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 21:22:44,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 21:22:44,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 21:22:44,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 21:22:44,456 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 21:22:44,456 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 21:22:44,456 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 21:22:44,456 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 21:22:44,456 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 21:22:44,456 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 21:22:44,456 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 21:22:44,457 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:22:44,457 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:22:44,457 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 21:22:44,457 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 21:22:44,457 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-13 21:22:44,457 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:22:44,457 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 21:22:44,458 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 21:22:44,458 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:22:44,458 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:22:44,458 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:22:44,458 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:22:44,458 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 21:22:44,458 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 21:22:44,458 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-13 21:22:44,458 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-13 21:22:44,469 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 21:22:44,469 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 21:22:44,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:22:44 BasicIcfg [2021-10-13 21:22:44,471 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 21:22:44,472 INFO L168 Benchmark]: Toolchain (without parser) took 844052.52 ms. Allocated memory was 151.0 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 125.4 MB in the beginning and 791.4 MB in the end (delta: -665.9 MB). Peak memory consumption was 503.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:44,472 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 21:22:44,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 112.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:44,473 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.08 ms. Allocated memory is still 151.0 MB. Free memory was 111.9 MB in the beginning and 110.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:44,473 INFO L168 Benchmark]: Boogie Preprocessor took 75.54 ms. Allocated memory is still 151.0 MB. Free memory was 110.1 MB in the beginning and 108.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:44,474 INFO L168 Benchmark]: RCFGBuilder took 1542.81 ms. Allocated memory is still 151.0 MB. Free memory was 108.3 MB in the beginning and 113.8 MB in the end (delta: -5.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:44,474 INFO L168 Benchmark]: TraceAbstraction took 841987.77 ms. Allocated memory was 151.0 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 113.2 MB in the beginning and 791.4 MB in the end (delta: -678.1 MB). Peak memory consumption was 490.5 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:44,476 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 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 350.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 112.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 80.08 ms. Allocated memory is still 151.0 MB. Free memory was 111.9 MB in the beginning and 110.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.54 ms. Allocated memory is still 151.0 MB. Free memory was 110.1 MB in the beginning and 108.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1542.81 ms. Allocated memory is still 151.0 MB. Free memory was 108.3 MB in the beginning and 113.8 MB in the end (delta: -5.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 841987.77 ms. Allocated memory was 151.0 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 113.2 MB in the beginning and 791.4 MB in the end (delta: -678.1 MB). Peak memory consumption was 490.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 30058.2ms, 169 PlacesBefore, 61 PlacesAfterwards, 172 TransitionsBefore, 55 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 7 FixpointIterations, 92 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 181 TotalNumberOfCompositions, 3569 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3306, positive: 3275, positive conditional: 0, positive unconditional: 3275, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1349, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1349, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 9, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 717, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 717, negative conditional: 0, negative unconditional: 717, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3306, positive: 1935, positive conditional: 0, positive unconditional: 1935, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 1349, unknown conditional: 0, unknown unconditional: 1349] , Statistics on independence cache: Total cache size (in pairs): 150, Positive cache size: 148, Positive conditional cache size: 0, Positive unconditional cache size: 148, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4983states) and FLOYD_HOARE automaton (currently 63 states, 44 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 202 locations, 43 error locations. Started 1 CEGAR loops. OverallTime: 841778.9ms, OverallIterations: 35, TraceHistogramMax: 14, EmptinessCheckTime: 94.6ms, AutomataDifference: 661624.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30200.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2339 SDtfs, 29659 SDslu, 26655 SDs, 0 SdLazy, 40507 SolverSat, 1634 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 320868.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1122 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 916 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10492 ImplicationChecksByTransitivity, 384000.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5492occurred in iteration=32, InterpolantAutomatonStates: 589, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4299.8ms AutomataMinimizationTime, 34 MinimizatonAttempts, 94809 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 327.1ms SsaConstructionTime, 4223.8ms SatisfiabilityAnalysisTime, 128410.4ms InterpolantComputationTime, 371 NumberOfCodeBlocks, 365 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 672 ConstructedInterpolants, 158 QuantifiedInterpolants, 17313 SizeOfPredicates, 441 NumberOfNonLiveVariables, 2889 ConjunctsInSsa, 592 ConjunctsInUnsatCore, 70 InterpolantComputations, 17 PerfectInterpolantSequences, 270/1388 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