/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 12:44:27,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 12:44:27,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 12:44:27,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 12:44:27,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 12:44:27,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 12:44:27,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 12:44:27,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 12:44:27,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 12:44:27,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 12:44:27,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 12:44:27,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 12:44:27,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 12:44:27,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 12:44:27,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 12:44:27,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 12:44:27,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 12:44:27,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 12:44:27,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 12:44:27,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 12:44:27,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 12:44:27,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 12:44:27,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 12:44:27,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 12:44:27,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-11 12:44:27,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 12:44:27,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 12:44:27,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 12:44:27,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 12:44:27,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 12:44:27,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 12:44:27,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 12:44:27,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 12:44:27,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 12:44:27,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 12:44:27,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 12:44:27,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-11 12:44:27,503 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 12:44:27,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 12:44:27,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 12:44:27,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 12:44:27,505 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 12:44:27,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 12:44:27,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 12:44:27,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 12:44:27,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 12:44:27,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 12:44:27,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 12:44:27,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 12:44:27,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 12:44:27,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 12:44:27,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 12:44:27,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 12:44:27,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 12:44:27,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 12:44:27,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 12:44:27,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 12:44:27,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 12:44:27,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 12:44:27,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 12:44:27,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 12:44:27,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 12:44:27,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 12:44:27,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 12:44:27,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 12:44:27,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 12:44:27,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 12:44:27,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 12:44:27,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 12:44:27,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 12:44:27,807 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 12:44:27,808 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 12:44:27,809 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-10-11 12:44:27,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85cb13111/8cea293b429248c888b31a5f2541d627/FLAG5535d5062 [2020-10-11 12:44:28,393 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 12:44:28,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2020-10-11 12:44:28,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85cb13111/8cea293b429248c888b31a5f2541d627/FLAG5535d5062 [2020-10-11 12:44:28,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85cb13111/8cea293b429248c888b31a5f2541d627 [2020-10-11 12:44:28,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 12:44:28,694 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 12:44:28,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 12:44:28,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 12:44:28,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 12:44:28,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:44:28" (1/1) ... [2020-10-11 12:44:28,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d1d29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:28, skipping insertion in model container [2020-10-11 12:44:28,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:44:28" (1/1) ... [2020-10-11 12:44:28,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 12:44:28,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 12:44:29,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 12:44:29,384 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 12:44:29,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 12:44:29,592 INFO L208 MainTranslator]: Completed translation [2020-10-11 12:44:29,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29 WrapperNode [2020-10-11 12:44:29,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 12:44:29,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 12:44:29,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 12:44:29,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 12:44:29,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... [2020-10-11 12:44:29,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... [2020-10-11 12:44:29,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 12:44:29,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 12:44:29,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 12:44:29,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 12:44:29,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... [2020-10-11 12:44:29,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... [2020-10-11 12:44:29,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... [2020-10-11 12:44:29,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... [2020-10-11 12:44:29,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... [2020-10-11 12:44:29,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... [2020-10-11 12:44:29,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... [2020-10-11 12:44:29,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 12:44:29,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 12:44:29,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 12:44:29,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 12:44:29,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 12:44:29,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 12:44:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 12:44:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-11 12:44:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-10-11 12:44:29,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-10-11 12:44:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 12:44:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-11 12:44:29,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 12:44:29,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 12:44:29,771 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 12:44:30,182 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 12:44:30,182 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-11 12:44:30,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:44:30 BoogieIcfgContainer [2020-10-11 12:44:30,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 12:44:30,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 12:44:30,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 12:44:30,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 12:44:30,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:44:28" (1/3) ... [2020-10-11 12:44:30,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f7b3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:44:30, skipping insertion in model container [2020-10-11 12:44:30,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:29" (2/3) ... [2020-10-11 12:44:30,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f7b3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:44:30, skipping insertion in model container [2020-10-11 12:44:30,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:44:30" (3/3) ... [2020-10-11 12:44:30,194 INFO L111 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-10-11 12:44:30,205 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 12:44:30,206 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 12:44:30,214 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 12:44:30,215 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 12:44:30,247 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,247 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,247 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,248 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,248 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,248 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,249 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,249 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,249 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,249 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,250 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,250 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,250 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,251 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,251 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,252 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,252 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,252 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,252 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,252 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,253 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,253 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,253 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,253 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,254 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,254 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,254 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,254 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,255 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,255 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,255 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,256 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,256 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,256 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,256 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,256 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,257 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,257 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,257 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,257 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,258 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,258 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,258 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,258 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,259 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,259 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,259 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,259 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,260 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,260 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,260 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,260 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,260 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,261 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,261 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,261 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,261 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,262 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,262 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,262 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,262 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,263 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,263 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,263 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,263 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,263 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,264 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,264 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,264 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,264 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,265 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,265 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,265 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,265 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,266 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,266 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,266 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,266 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,267 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,267 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,267 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,267 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,268 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,268 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,268 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,268 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,269 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,272 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,273 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,273 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,273 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,274 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,274 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,274 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,274 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,275 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,275 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,275 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,275 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,276 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,276 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,276 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,277 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,277 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,277 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,277 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,278 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,278 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,278 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,278 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,279 WARN L313 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,279 WARN L313 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:30,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 12:44:30,322 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 12:44:30,323 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 12:44:30,323 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 12:44:30,323 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 12:44:30,323 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 12:44:30,323 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 12:44:30,323 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 12:44:30,324 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 12:44:30,338 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 12:44:30,342 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions, 218 flow [2020-10-11 12:44:30,345 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 105 transitions, 218 flow [2020-10-11 12:44:30,347 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-10-11 12:44:30,402 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-10-11 12:44:30,403 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-10-11 12:44:30,409 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-10-11 12:44:30,414 INFO L117 LiptonReduction]: Number of co-enabled transitions 2652 [2020-10-11 12:44:32,497 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-11 12:44:32,704 INFO L132 LiptonReduction]: Checked pairs total: 2598 [2020-10-11 12:44:32,704 INFO L134 LiptonReduction]: Total number of compositions: 97 [2020-10-11 12:44:32,710 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 25 transitions, 58 flow [2020-10-11 12:44:32,722 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2020-10-11 12:44:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-11 12:44:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-11 12:44:32,730 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:32,731 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:32,731 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:44:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2020-10-11 12:44:32,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:32,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049287637] [2020-10-11 12:44:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049287637] [2020-10-11 12:44:32,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:32,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 12:44:32,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652665697] [2020-10-11 12:44:32,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 12:44:32,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:32,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 12:44:32,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 12:44:32,933 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-10-11 12:44:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:32,994 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2020-10-11 12:44:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 12:44:32,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-10-11 12:44:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:33,008 INFO L225 Difference]: With dead ends: 61 [2020-10-11 12:44:33,008 INFO L226 Difference]: Without dead ends: 53 [2020-10-11 12:44:33,010 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 12:44:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-11 12:44:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-11 12:44:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 12:44:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2020-10-11 12:44:33,054 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2020-10-11 12:44:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:33,055 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2020-10-11 12:44:33,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 12:44:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2020-10-11 12:44:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:33,056 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:33,056 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:33,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 12:44:33,056 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:44:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:33,057 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2020-10-11 12:44:33,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:33,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934751432] [2020-10-11 12:44:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934751432] [2020-10-11 12:44:33,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109810402] [2020-10-11 12:44:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-11 12:44:33,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:33,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2020-10-11 12:44:33,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689953590] [2020-10-11 12:44:33,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:33,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:33,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:33,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:33,228 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 5 states. [2020-10-11 12:44:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:33,256 INFO L93 Difference]: Finished difference Result 42 states and 81 transitions. [2020-10-11 12:44:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 12:44:33,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:33,258 INFO L225 Difference]: With dead ends: 42 [2020-10-11 12:44:33,258 INFO L226 Difference]: Without dead ends: 42 [2020-10-11 12:44:33,259 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-11 12:44:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-11 12:44:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 12:44:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2020-10-11 12:44:33,266 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 8 [2020-10-11 12:44:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:33,266 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2020-10-11 12:44:33,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2020-10-11 12:44:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:33,267 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:33,267 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:33,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-11 12:44:33,472 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:44:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash 781631558, now seen corresponding path program 2 times [2020-10-11 12:44:33,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:33,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006574585] [2020-10-11 12:44:33,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006574585] [2020-10-11 12:44:33,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403267584] [2020-10-11 12:44:33,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:33,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-11 12:44:33,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:33,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 12:44:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:33,715 INFO L384 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 63 treesize of output 59 [2020-10-11 12:44:33,722 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-11 12:44:33,763 INFO L625 ElimStorePlain]: treesize reduction 40, result has 24.5 percent of original size [2020-10-11 12:44:33,767 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-11 12:44:33,768 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:4 [2020-10-11 12:44:33,796 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-11 12:44:33,796 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-11 12:44:33,803 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-11 12:44:33,803 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-11 12:44:33,804 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-11 12:44:33,862 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-10-11 12:44:33,863 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-11 12:44:33,870 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-11 12:44:33,873 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-11 12:44:33,873 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:27 [2020-10-11 12:44:33,946 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-10-11 12:44:33,949 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-11 12:44:33,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-11 12:44:33,959 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-11 12:44:33,959 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:37, output treesize:7 [2020-10-11 12:44:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:44:33,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 12:44:33,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 10 [2020-10-11 12:44:33,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136818551] [2020-10-11 12:44:33,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 12:44:33,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:33,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 12:44:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:33,976 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand 8 states. [2020-10-11 12:44:42,125 WARN L193 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-11 12:44:50,210 WARN L193 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-11 12:44:56,346 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-11 12:45:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:04,776 INFO L93 Difference]: Finished difference Result 105 states and 214 transitions. [2020-10-11 12:45:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:04,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-10-11 12:45:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:04,781 INFO L225 Difference]: With dead ends: 105 [2020-10-11 12:45:04,781 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 12:45:04,782 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 12:45:04,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 52. [2020-10-11 12:45:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 12:45:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2020-10-11 12:45:04,792 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 9 [2020-10-11 12:45:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:04,792 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2020-10-11 12:45:04,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 12:45:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2020-10-11 12:45:04,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:45:04,794 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:04,794 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:05,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,002 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:05,003 INFO L82 PathProgramCache]: Analyzing trace with hash -472215434, now seen corresponding path program 1 times [2020-10-11 12:45:05,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:05,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467605555] [2020-10-11 12:45:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 12:45:05,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467605555] [2020-10-11 12:45:05,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680093983] [2020-10-11 12:45:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:05,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 12:45:05,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 12:45:05,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:05,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-11 12:45:05,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234286152] [2020-10-11 12:45:05,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:45:05,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:05,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:45:05,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:45:05,142 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 6 states. [2020-10-11 12:45:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:05,164 INFO L93 Difference]: Finished difference Result 53 states and 107 transitions. [2020-10-11 12:45:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 12:45:05,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-11 12:45:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:05,166 INFO L225 Difference]: With dead ends: 53 [2020-10-11 12:45:05,166 INFO L226 Difference]: Without dead ends: 53 [2020-10-11 12:45:05,167 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:45:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-11 12:45:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-11 12:45:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 12:45:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2020-10-11 12:45:05,173 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 11 [2020-10-11 12:45:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:05,173 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2020-10-11 12:45:05,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:45:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2020-10-11 12:45:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:05,174 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:05,175 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:05,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,375 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:05,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 2 times [2020-10-11 12:45:05,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:05,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592626350] [2020-10-11 12:45:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 12:45:05,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592626350] [2020-10-11 12:45:05,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990311664] [2020-10-11 12:45:05,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 12:45:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 12:45:05,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:05,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 12:45:05,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021801751] [2020-10-11 12:45:05,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 12:45:05,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 12:45:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-11 12:45:05,528 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 7 states. [2020-10-11 12:45:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:05,551 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2020-10-11 12:45:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 12:45:05,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-11 12:45:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:05,552 INFO L225 Difference]: With dead ends: 54 [2020-10-11 12:45:05,553 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 12:45:05,553 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-11 12:45:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 12:45:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-11 12:45:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 12:45:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2020-10-11 12:45:05,559 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 12 [2020-10-11 12:45:05,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:05,559 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2020-10-11 12:45:05,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 12:45:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2020-10-11 12:45:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:05,560 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:05,561 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:05,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,773 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:05,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1307407978, now seen corresponding path program 3 times [2020-10-11 12:45:05,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:05,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150574564] [2020-10-11 12:45:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 12:45:05,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150574564] [2020-10-11 12:45:05,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542182537] [2020-10-11 12:45:05,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:05,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:05,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 12:45:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:05,951 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-11 12:45:05,951 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-11 12:45:05,955 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-11 12:45:05,956 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-11 12:45:05,956 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2020-10-11 12:45:05,972 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 [2020-10-11 12:45:05,973 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-11 12:45:05,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-11 12:45:05,977 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-11 12:45:05,978 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-10-11 12:45:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 12:45:05,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 12:45:05,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2020-10-11 12:45:05,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131126898] [2020-10-11 12:45:05,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 12:45:05,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:05,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 12:45:05,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:45:05,993 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand 7 states. [2020-10-11 12:45:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:06,157 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2020-10-11 12:45:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:45:06,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-11 12:45:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:06,159 INFO L225 Difference]: With dead ends: 74 [2020-10-11 12:45:06,159 INFO L226 Difference]: Without dead ends: 74 [2020-10-11 12:45:06,160 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-11 12:45:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2020-10-11 12:45:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 12:45:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 95 transitions. [2020-10-11 12:45:06,166 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 95 transitions. Word has length 13 [2020-10-11 12:45:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:06,166 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 95 transitions. [2020-10-11 12:45:06,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 12:45:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 95 transitions. [2020-10-11 12:45:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:06,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:06,167 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:06,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-11 12:45:06,381 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:06,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:06,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1307414801, now seen corresponding path program 1 times [2020-10-11 12:45:06,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:06,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566257170] [2020-10-11 12:45:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:06,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566257170] [2020-10-11 12:45:06,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181491925] [2020-10-11 12:45:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:06,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 12:45:06,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:06,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:06,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 12:45:06,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092383371] [2020-10-11 12:45:06,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 12:45:06,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:06,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 12:45:06,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-11 12:45:06,526 INFO L87 Difference]: Start difference. First operand 49 states and 95 transitions. Second operand 8 states. [2020-10-11 12:45:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:06,575 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2020-10-11 12:45:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:45:06,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-11 12:45:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:06,577 INFO L225 Difference]: With dead ends: 50 [2020-10-11 12:45:06,577 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 12:45:06,577 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-11 12:45:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 12:45:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-11 12:45:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 12:45:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2020-10-11 12:45:06,583 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 13 [2020-10-11 12:45:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:06,584 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2020-10-11 12:45:06,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 12:45:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2020-10-11 12:45:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:45:06,584 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:06,585 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:06,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:06,797 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:06,798 INFO L82 PathProgramCache]: Analyzing trace with hash 991125624, now seen corresponding path program 2 times [2020-10-11 12:45:06,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:06,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654877937] [2020-10-11 12:45:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:06,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654877937] [2020-10-11 12:45:06,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000083710] [2020-10-11 12:45:06,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:06,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:06,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:06,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:45:06,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:06,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:06,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 12:45:06,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111030222] [2020-10-11 12:45:06,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:45:06,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:45:06,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:45:06,947 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand 9 states. [2020-10-11 12:45:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:06,972 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2020-10-11 12:45:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:45:06,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-11 12:45:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:06,975 INFO L225 Difference]: With dead ends: 51 [2020-10-11 12:45:06,975 INFO L226 Difference]: Without dead ends: 51 [2020-10-11 12:45:06,975 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:45:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-11 12:45:06,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-11 12:45:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 12:45:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2020-10-11 12:45:06,979 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 14 [2020-10-11 12:45:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:06,980 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2020-10-11 12:45:06,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:45:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2020-10-11 12:45:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:45:06,980 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:06,981 INFO L421 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:07,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,192 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash -768565233, now seen corresponding path program 3 times [2020-10-11 12:45:07,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:07,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188729839] [2020-10-11 12:45:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:07,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188729839] [2020-10-11 12:45:07,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488286377] [2020-10-11 12:45:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:45:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:07,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:45:07,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:07,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:07,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 12:45:07,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501389090] [2020-10-11 12:45:07,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 12:45:07,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:07,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 12:45:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-11 12:45:07,374 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand 10 states. [2020-10-11 12:45:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:07,403 INFO L93 Difference]: Finished difference Result 52 states and 98 transitions. [2020-10-11 12:45:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:45:07,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-10-11 12:45:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:07,406 INFO L225 Difference]: With dead ends: 52 [2020-10-11 12:45:07,406 INFO L226 Difference]: Without dead ends: 52 [2020-10-11 12:45:07,407 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-11 12:45:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-11 12:45:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-11 12:45:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 12:45:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2020-10-11 12:45:07,416 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 15 [2020-10-11 12:45:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:07,416 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2020-10-11 12:45:07,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 12:45:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2020-10-11 12:45:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 12:45:07,420 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:07,420 INFO L421 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:07,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-11 12:45:07,621 INFO L429 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:07,622 INFO L82 PathProgramCache]: Analyzing trace with hash 515593048, now seen corresponding path program 4 times [2020-10-11 12:45:07,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:07,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149886317] [2020-10-11 12:45:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:07,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149886317] [2020-10-11 12:45:07,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204941164] [2020-10-11 12:45:07,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:07,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:07,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:45:07,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:07,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:07,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 12:45:07,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645396370] [2020-10-11 12:45:07,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:45:07,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:07,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:45:07,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:45:07,760 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 11 states. [2020-10-11 12:45:07,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:07,781 INFO L93 Difference]: Finished difference Result 53 states and 99 transitions. [2020-10-11 12:45:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:45:07,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-10-11 12:45:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:07,782 INFO L225 Difference]: With dead ends: 53 [2020-10-11 12:45:07,782 INFO L226 Difference]: Without dead ends: 53 [2020-10-11 12:45:07,782 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:45:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-11 12:45:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-11 12:45:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 12:45:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 99 transitions. [2020-10-11 12:45:07,786 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 99 transitions. Word has length 16 [2020-10-11 12:45:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:07,786 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 99 transitions. [2020-10-11 12:45:07,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:45:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 99 transitions. [2020-10-11 12:45:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 12:45:07,787 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:07,787 INFO L421 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:07,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:07,997 INFO L429 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1669794095, now seen corresponding path program 5 times [2020-10-11 12:45:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:07,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357704852] [2020-10-11 12:45:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:08,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357704852] [2020-10-11 12:45:08,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438992459] [2020-10-11 12:45:08,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 12:45:08,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:08,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:08,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:08,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:08,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 12:45:08,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215037070] [2020-10-11 12:45:08,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 12:45:08,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:08,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 12:45:08,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:45:08,203 INFO L87 Difference]: Start difference. First operand 53 states and 99 transitions. Second operand 12 states. [2020-10-11 12:45:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:08,227 INFO L93 Difference]: Finished difference Result 54 states and 100 transitions. [2020-10-11 12:45:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:08,228 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-10-11 12:45:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:08,229 INFO L225 Difference]: With dead ends: 54 [2020-10-11 12:45:08,229 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 12:45:08,229 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:45:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 12:45:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-11 12:45:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 12:45:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2020-10-11 12:45:08,233 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 17 [2020-10-11 12:45:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:08,234 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2020-10-11 12:45:08,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 12:45:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2020-10-11 12:45:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 12:45:08,235 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:08,235 INFO L421 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:08,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,447 INFO L429 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:08,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:08,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1204679112, now seen corresponding path program 6 times [2020-10-11 12:45:08,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:08,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423895070] [2020-10-11 12:45:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:08,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423895070] [2020-10-11 12:45:08,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013830432] [2020-10-11 12:45:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 12:45:08,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:45:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:08,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:08,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 12:45:08,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173439487] [2020-10-11 12:45:08,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:45:08,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:08,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:45:08,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:45:08,676 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand 13 states. [2020-10-11 12:45:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:08,701 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2020-10-11 12:45:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:08,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-10-11 12:45:08,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:08,702 INFO L225 Difference]: With dead ends: 55 [2020-10-11 12:45:08,702 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 12:45:08,703 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:45:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 12:45:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-11 12:45:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 12:45:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 101 transitions. [2020-10-11 12:45:08,706 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 101 transitions. Word has length 18 [2020-10-11 12:45:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:08,707 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 101 transitions. [2020-10-11 12:45:08,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:45:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 101 transitions. [2020-10-11 12:45:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 12:45:08,708 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:08,708 INFO L421 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:08,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-11 12:45:08,909 INFO L429 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash -119035313, now seen corresponding path program 7 times [2020-10-11 12:45:08,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:08,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559075681] [2020-10-11 12:45:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:09,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559075681] [2020-10-11 12:45:09,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365057231] [2020-10-11 12:45:09,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:45:09,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:09,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:09,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 12:45:09,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397727097] [2020-10-11 12:45:09,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 12:45:09,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 12:45:09,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:45:09,104 INFO L87 Difference]: Start difference. First operand 55 states and 101 transitions. Second operand 14 states. [2020-10-11 12:45:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:09,131 INFO L93 Difference]: Finished difference Result 56 states and 102 transitions. [2020-10-11 12:45:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:09,132 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-10-11 12:45:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:09,132 INFO L225 Difference]: With dead ends: 56 [2020-10-11 12:45:09,132 INFO L226 Difference]: Without dead ends: 56 [2020-10-11 12:45:09,133 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:45:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-11 12:45:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-11 12:45:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 12:45:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 102 transitions. [2020-10-11 12:45:09,162 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 102 transitions. Word has length 19 [2020-10-11 12:45:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:09,163 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 102 transitions. [2020-10-11 12:45:09,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 12:45:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 102 transitions. [2020-10-11 12:45:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 12:45:09,164 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:09,164 INFO L421 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:09,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 12:45:09,365 INFO L429 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash -823815912, now seen corresponding path program 8 times [2020-10-11 12:45:09,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:09,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96256943] [2020-10-11 12:45:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:09,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96256943] [2020-10-11 12:45:09,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622883113] [2020-10-11 12:45:09,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:09,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:09,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 12:45:09,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:09,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:09,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 12:45:09,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678851615] [2020-10-11 12:45:09,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:09,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:09,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:09,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:09,570 INFO L87 Difference]: Start difference. First operand 56 states and 102 transitions. Second operand 15 states. [2020-10-11 12:45:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:09,601 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2020-10-11 12:45:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:09,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-10-11 12:45:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:09,602 INFO L225 Difference]: With dead ends: 57 [2020-10-11 12:45:09,602 INFO L226 Difference]: Without dead ends: 57 [2020-10-11 12:45:09,603 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-11 12:45:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-11 12:45:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 12:45:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 103 transitions. [2020-10-11 12:45:09,606 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 103 transitions. Word has length 20 [2020-10-11 12:45:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:09,606 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 103 transitions. [2020-10-11 12:45:09,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 103 transitions. [2020-10-11 12:45:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 12:45:09,607 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:09,607 INFO L421 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:09,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 12:45:09,819 INFO L429 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:09,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1197178001, now seen corresponding path program 9 times [2020-10-11 12:45:09,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:09,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547803532] [2020-10-11 12:45:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:09,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547803532] [2020-10-11 12:45:09,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061404962] [2020-10-11 12:45:09,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:10,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 12:45:10,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 12:45:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:10,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:10,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 12:45:10,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977322723] [2020-10-11 12:45:10,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 12:45:10,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:10,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 12:45:10,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:45:10,135 INFO L87 Difference]: Start difference. First operand 57 states and 103 transitions. Second operand 16 states. [2020-10-11 12:45:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:10,164 INFO L93 Difference]: Finished difference Result 58 states and 104 transitions. [2020-10-11 12:45:10,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:10,165 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-10-11 12:45:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:10,166 INFO L225 Difference]: With dead ends: 58 [2020-10-11 12:45:10,166 INFO L226 Difference]: Without dead ends: 58 [2020-10-11 12:45:10,166 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:45:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-11 12:45:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-11 12:45:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 12:45:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 104 transitions. [2020-10-11 12:45:10,169 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 104 transitions. Word has length 21 [2020-10-11 12:45:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:10,170 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 104 transitions. [2020-10-11 12:45:10,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 12:45:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 104 transitions. [2020-10-11 12:45:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 12:45:10,171 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:10,171 INFO L421 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:10,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:10,372 INFO L429 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:10,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:10,372 INFO L82 PathProgramCache]: Analyzing trace with hash 113499128, now seen corresponding path program 10 times [2020-10-11 12:45:10,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:10,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180436557] [2020-10-11 12:45:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:10,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180436557] [2020-10-11 12:45:10,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754866510] [2020-10-11 12:45:10,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:10,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:10,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 12:45:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:10,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:10,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 12:45:10,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363322688] [2020-10-11 12:45:10,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:45:10,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:10,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:45:10,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:45:10,605 INFO L87 Difference]: Start difference. First operand 58 states and 104 transitions. Second operand 17 states. [2020-10-11 12:45:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:10,638 INFO L93 Difference]: Finished difference Result 59 states and 105 transitions. [2020-10-11 12:45:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:10,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-10-11 12:45:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:10,640 INFO L225 Difference]: With dead ends: 59 [2020-10-11 12:45:10,641 INFO L226 Difference]: Without dead ends: 59 [2020-10-11 12:45:10,641 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:45:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-11 12:45:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-11 12:45:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-11 12:45:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 105 transitions. [2020-10-11 12:45:10,644 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 105 transitions. Word has length 22 [2020-10-11 12:45:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:10,644 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 105 transitions. [2020-10-11 12:45:10,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:45:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 105 transitions. [2020-10-11 12:45:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 12:45:10,645 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:10,645 INFO L421 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:10,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 12:45:10,856 INFO L429 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2089784463, now seen corresponding path program 11 times [2020-10-11 12:45:10,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:10,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019893828] [2020-10-11 12:45:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:11,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019893828] [2020-10-11 12:45:11,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639091557] [2020-10-11 12:45:11,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:11,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 12:45:11,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:11,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 12:45:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:11,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:11,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 12:45:11,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027541143] [2020-10-11 12:45:11,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 12:45:11,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 12:45:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:45:11,305 INFO L87 Difference]: Start difference. First operand 59 states and 105 transitions. Second operand 18 states. [2020-10-11 12:45:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:11,347 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2020-10-11 12:45:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:45:11,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-10-11 12:45:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:11,349 INFO L225 Difference]: With dead ends: 60 [2020-10-11 12:45:11,349 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 12:45:11,350 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:45:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 12:45:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-11 12:45:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 12:45:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 106 transitions. [2020-10-11 12:45:11,353 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 106 transitions. Word has length 23 [2020-10-11 12:45:11,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:11,353 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 106 transitions. [2020-10-11 12:45:11,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 12:45:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 106 transitions. [2020-10-11 12:45:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 12:45:11,354 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:11,355 INFO L421 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:11,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 12:45:11,565 INFO L429 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:11,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1069879592, now seen corresponding path program 12 times [2020-10-11 12:45:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:11,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200239857] [2020-10-11 12:45:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:11,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200239857] [2020-10-11 12:45:11,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869485607] [2020-10-11 12:45:11,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:12,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 12:45:12,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:12,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 12:45:12,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:12,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:12,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 12:45:12,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921359212] [2020-10-11 12:45:12,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:45:12,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:12,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:45:12,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:45:12,159 INFO L87 Difference]: Start difference. First operand 60 states and 106 transitions. Second operand 19 states. [2020-10-11 12:45:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:12,240 INFO L93 Difference]: Finished difference Result 61 states and 107 transitions. [2020-10-11 12:45:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:45:12,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2020-10-11 12:45:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:12,244 INFO L225 Difference]: With dead ends: 61 [2020-10-11 12:45:12,244 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 12:45:12,244 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:45:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 12:45:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-11 12:45:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 12:45:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2020-10-11 12:45:12,247 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 24 [2020-10-11 12:45:12,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:12,247 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2020-10-11 12:45:12,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:45:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2020-10-11 12:45:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 12:45:12,248 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:12,248 INFO L421 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:12,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 12:45:12,457 INFO L429 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:12,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:12,458 INFO L82 PathProgramCache]: Analyzing trace with hash -235217489, now seen corresponding path program 13 times [2020-10-11 12:45:12,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:12,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483546274] [2020-10-11 12:45:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:12,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483546274] [2020-10-11 12:45:12,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587550597] [2020-10-11 12:45:12,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:12,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 12:45:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:12,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:12,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 12:45:12,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373674343] [2020-10-11 12:45:12,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 12:45:12,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:12,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 12:45:12,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:12,733 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand 20 states. [2020-10-11 12:45:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:12,762 INFO L93 Difference]: Finished difference Result 62 states and 108 transitions. [2020-10-11 12:45:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:45:12,762 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-10-11 12:45:12,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:12,763 INFO L225 Difference]: With dead ends: 62 [2020-10-11 12:45:12,763 INFO L226 Difference]: Without dead ends: 62 [2020-10-11 12:45:12,764 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-11 12:45:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-11 12:45:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 12:45:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 108 transitions. [2020-10-11 12:45:12,766 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 108 transitions. Word has length 25 [2020-10-11 12:45:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:12,766 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 108 transitions. [2020-10-11 12:45:12,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 12:45:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 108 transitions. [2020-10-11 12:45:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 12:45:12,767 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:12,767 INFO L421 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:12,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:12,976 INFO L429 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:12,976 INFO L82 PathProgramCache]: Analyzing trace with hash -130496072, now seen corresponding path program 14 times [2020-10-11 12:45:12,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:12,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125752911] [2020-10-11 12:45:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:13,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125752911] [2020-10-11 12:45:13,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948094840] [2020-10-11 12:45:13,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:13,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:13,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:13,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 12:45:13,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:13,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:13,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 12:45:13,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170963291] [2020-10-11 12:45:13,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 12:45:13,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:13,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 12:45:13,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:13,260 INFO L87 Difference]: Start difference. First operand 62 states and 108 transitions. Second operand 21 states. [2020-10-11 12:45:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:13,292 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2020-10-11 12:45:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:45:13,294 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-10-11 12:45:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:13,294 INFO L225 Difference]: With dead ends: 63 [2020-10-11 12:45:13,294 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 12:45:13,295 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 12:45:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-11 12:45:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 12:45:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 109 transitions. [2020-10-11 12:45:13,300 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 109 transitions. Word has length 26 [2020-10-11 12:45:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:13,300 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 109 transitions. [2020-10-11 12:45:13,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 12:45:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 109 transitions. [2020-10-11 12:45:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 12:45:13,301 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:13,301 INFO L421 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:13,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:13,503 INFO L429 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:13,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1179099441, now seen corresponding path program 15 times [2020-10-11 12:45:13,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:13,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206677852] [2020-10-11 12:45:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:13,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206677852] [2020-10-11 12:45:13,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811823769] [2020-10-11 12:45:13,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:14,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 12:45:14,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:14,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 12:45:14,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:14,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:14,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 12:45:14,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407850687] [2020-10-11 12:45:14,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 12:45:14,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:14,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 12:45:14,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:45:14,293 INFO L87 Difference]: Start difference. First operand 63 states and 109 transitions. Second operand 22 states. [2020-10-11 12:45:14,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:14,331 INFO L93 Difference]: Finished difference Result 64 states and 110 transitions. [2020-10-11 12:45:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:14,332 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-10-11 12:45:14,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:14,333 INFO L225 Difference]: With dead ends: 64 [2020-10-11 12:45:14,333 INFO L226 Difference]: Without dead ends: 64 [2020-10-11 12:45:14,334 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:45:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-11 12:45:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-11 12:45:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 12:45:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 110 transitions. [2020-10-11 12:45:14,336 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 110 transitions. Word has length 27 [2020-10-11 12:45:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:14,337 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 110 transitions. [2020-10-11 12:45:14,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 12:45:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 110 transitions. [2020-10-11 12:45:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 12:45:14,337 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:14,337 INFO L421 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:14,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-11 12:45:14,538 INFO L429 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:14,539 INFO L82 PathProgramCache]: Analyzing trace with hash 673934488, now seen corresponding path program 16 times [2020-10-11 12:45:14,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:14,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639340762] [2020-10-11 12:45:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:14,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639340762] [2020-10-11 12:45:14,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628592292] [2020-10-11 12:45:14,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:14,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:14,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:14,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 12:45:14,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:14,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:14,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 12:45:14,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214841177] [2020-10-11 12:45:14,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 12:45:14,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:14,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 12:45:14,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:14,908 INFO L87 Difference]: Start difference. First operand 64 states and 110 transitions. Second operand 23 states. [2020-10-11 12:45:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:14,946 INFO L93 Difference]: Finished difference Result 65 states and 111 transitions. [2020-10-11 12:45:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:45:14,946 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2020-10-11 12:45:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:14,947 INFO L225 Difference]: With dead ends: 65 [2020-10-11 12:45:14,947 INFO L226 Difference]: Without dead ends: 65 [2020-10-11 12:45:14,947 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:14,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-11 12:45:14,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-11 12:45:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 12:45:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 111 transitions. [2020-10-11 12:45:14,952 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 111 transitions. Word has length 28 [2020-10-11 12:45:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:14,952 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 111 transitions. [2020-10-11 12:45:14,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 12:45:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 111 transitions. [2020-10-11 12:45:14,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 12:45:14,953 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:14,953 INFO L421 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:15,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 12:45:15,154 INFO L429 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2011555857, now seen corresponding path program 17 times [2020-10-11 12:45:15,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:15,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017341510] [2020-10-11 12:45:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:15,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017341510] [2020-10-11 12:45:15,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480102028] [2020-10-11 12:45:15,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:15,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 12:45:15,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:15,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 12:45:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:15,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:15,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 12:45:15,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535595956] [2020-10-11 12:45:15,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 12:45:15,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:15,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 12:45:15,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:45:15,787 INFO L87 Difference]: Start difference. First operand 65 states and 111 transitions. Second operand 24 states. [2020-10-11 12:45:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:15,820 INFO L93 Difference]: Finished difference Result 66 states and 112 transitions. [2020-10-11 12:45:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:45:15,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-10-11 12:45:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:15,821 INFO L225 Difference]: With dead ends: 66 [2020-10-11 12:45:15,821 INFO L226 Difference]: Without dead ends: 66 [2020-10-11 12:45:15,822 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:45:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-11 12:45:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-11 12:45:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 12:45:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 112 transitions. [2020-10-11 12:45:15,824 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 112 transitions. Word has length 29 [2020-10-11 12:45:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:15,824 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 112 transitions. [2020-10-11 12:45:15,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 12:45:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 112 transitions. [2020-10-11 12:45:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 12:45:15,825 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:15,825 INFO L421 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:16,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:16,026 INFO L429 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:16,027 INFO L82 PathProgramCache]: Analyzing trace with hash 637589368, now seen corresponding path program 18 times [2020-10-11 12:45:16,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:16,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31150168] [2020-10-11 12:45:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:16,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31150168] [2020-10-11 12:45:16,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062645175] [2020-10-11 12:45:16,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:16,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-11 12:45:16,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:16,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 12:45:16,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:16,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:16,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 12:45:16,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555761899] [2020-10-11 12:45:16,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 12:45:16,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:16,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 12:45:16,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:16,706 INFO L87 Difference]: Start difference. First operand 66 states and 112 transitions. Second operand 25 states. [2020-10-11 12:45:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:16,757 INFO L93 Difference]: Finished difference Result 67 states and 113 transitions. [2020-10-11 12:45:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:45:16,758 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2020-10-11 12:45:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:16,758 INFO L225 Difference]: With dead ends: 67 [2020-10-11 12:45:16,759 INFO L226 Difference]: Without dead ends: 67 [2020-10-11 12:45:16,759 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-11 12:45:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-11 12:45:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 12:45:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 113 transitions. [2020-10-11 12:45:16,762 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 113 transitions. Word has length 30 [2020-10-11 12:45:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:16,762 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 113 transitions. [2020-10-11 12:45:16,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 12:45:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 113 transitions. [2020-10-11 12:45:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 12:45:16,763 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:16,763 INFO L421 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:16,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-11 12:45:16,972 INFO L429 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:16,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1156712719, now seen corresponding path program 19 times [2020-10-11 12:45:16,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:16,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162497879] [2020-10-11 12:45:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:17,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162497879] [2020-10-11 12:45:17,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114329165] [2020-10-11 12:45:17,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 12:45:17,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:17,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:17,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 12:45:17,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796905967] [2020-10-11 12:45:17,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 12:45:17,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:17,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 12:45:17,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:45:17,549 INFO L87 Difference]: Start difference. First operand 67 states and 113 transitions. Second operand 26 states. [2020-10-11 12:45:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:17,637 INFO L93 Difference]: Finished difference Result 68 states and 114 transitions. [2020-10-11 12:45:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:45:17,638 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2020-10-11 12:45:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:17,639 INFO L225 Difference]: With dead ends: 68 [2020-10-11 12:45:17,639 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 12:45:17,640 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:45:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 12:45:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-11 12:45:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 12:45:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 114 transitions. [2020-10-11 12:45:17,644 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 114 transitions. Word has length 31 [2020-10-11 12:45:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:17,645 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 114 transitions. [2020-10-11 12:45:17,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 12:45:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 114 transitions. [2020-10-11 12:45:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 12:45:17,646 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:17,646 INFO L421 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:17,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:17,858 INFO L429 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash 69667416, now seen corresponding path program 20 times [2020-10-11 12:45:17,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:17,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667457146] [2020-10-11 12:45:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:18,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667457146] [2020-10-11 12:45:18,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800284569] [2020-10-11 12:45:18,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 12:45:18,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:18,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:18,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 12:45:18,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403966165] [2020-10-11 12:45:18,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 12:45:18,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:18,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 12:45:18,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:45:18,364 INFO L87 Difference]: Start difference. First operand 68 states and 114 transitions. Second operand 27 states. [2020-10-11 12:45:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:18,411 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2020-10-11 12:45:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 12:45:18,412 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2020-10-11 12:45:18,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:18,413 INFO L225 Difference]: With dead ends: 69 [2020-10-11 12:45:18,413 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 12:45:18,413 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:45:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 12:45:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-11 12:45:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 12:45:18,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 115 transitions. [2020-10-11 12:45:18,416 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 115 transitions. Word has length 32 [2020-10-11 12:45:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:18,417 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 115 transitions. [2020-10-11 12:45:18,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 12:45:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 115 transitions. [2020-10-11 12:45:18,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 12:45:18,417 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:18,418 INFO L421 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:18,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 12:45:18,628 INFO L429 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:18,629 INFO L82 PathProgramCache]: Analyzing trace with hash 731001391, now seen corresponding path program 21 times [2020-10-11 12:45:18,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:18,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223807291] [2020-10-11 12:45:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:18,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223807291] [2020-10-11 12:45:19,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703295209] [2020-10-11 12:45:19,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:21,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 12:45:21,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:21,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 12:45:21,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:21,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:21,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 12:45:21,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101556754] [2020-10-11 12:45:21,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 12:45:21,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:21,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 12:45:21,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:21,363 INFO L87 Difference]: Start difference. First operand 69 states and 115 transitions. Second operand 28 states. [2020-10-11 12:45:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:21,400 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2020-10-11 12:45:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:45:21,401 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2020-10-11 12:45:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:21,402 INFO L225 Difference]: With dead ends: 70 [2020-10-11 12:45:21,402 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 12:45:21,403 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 12:45:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-11 12:45:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 12:45:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 116 transitions. [2020-10-11 12:45:21,406 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 116 transitions. Word has length 33 [2020-10-11 12:45:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:21,407 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 116 transitions. [2020-10-11 12:45:21,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 12:45:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 116 transitions. [2020-10-11 12:45:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 12:45:21,407 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:21,408 INFO L421 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:21,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-11 12:45:21,611 INFO L429 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:21,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:21,611 INFO L82 PathProgramCache]: Analyzing trace with hash -242481864, now seen corresponding path program 22 times [2020-10-11 12:45:21,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:21,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723006018] [2020-10-11 12:45:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:22,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723006018] [2020-10-11 12:45:22,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200692145] [2020-10-11 12:45:22,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:22,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:22,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 12:45:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:22,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:22,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 12:45:22,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057854466] [2020-10-11 12:45:22,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 12:45:22,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:22,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 12:45:22,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:45:22,136 INFO L87 Difference]: Start difference. First operand 70 states and 116 transitions. Second operand 29 states. [2020-10-11 12:45:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:22,178 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2020-10-11 12:45:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 12:45:22,179 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 34 [2020-10-11 12:45:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:22,179 INFO L225 Difference]: With dead ends: 71 [2020-10-11 12:45:22,179 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 12:45:22,180 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:45:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 12:45:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-11 12:45:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 12:45:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 117 transitions. [2020-10-11 12:45:22,182 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 117 transitions. Word has length 34 [2020-10-11 12:45:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:22,182 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 117 transitions. [2020-10-11 12:45:22,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 12:45:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 117 transitions. [2020-10-11 12:45:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 12:45:22,183 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:22,183 INFO L421 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:22,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 12:45:22,384 INFO L429 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash -355691697, now seen corresponding path program 23 times [2020-10-11 12:45:22,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:22,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806091096] [2020-10-11 12:45:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:22,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806091096] [2020-10-11 12:45:22,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267301734] [2020-10-11 12:45:22,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:23,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-11 12:45:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:23,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 12:45:23,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:23,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:23,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 12:45:23,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277860819] [2020-10-11 12:45:23,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 12:45:23,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:23,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 12:45:23,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:45:23,365 INFO L87 Difference]: Start difference. First operand 71 states and 117 transitions. Second operand 30 states. [2020-10-11 12:45:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:23,405 INFO L93 Difference]: Finished difference Result 72 states and 118 transitions. [2020-10-11 12:45:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:45:23,406 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2020-10-11 12:45:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:23,406 INFO L225 Difference]: With dead ends: 72 [2020-10-11 12:45:23,406 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 12:45:23,407 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:45:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 12:45:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-11 12:45:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 12:45:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2020-10-11 12:45:23,411 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 35 [2020-10-11 12:45:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:23,411 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2020-10-11 12:45:23,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 12:45:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2020-10-11 12:45:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-11 12:45:23,412 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:23,412 INFO L421 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:23,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 12:45:23,623 INFO L429 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:23,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:23,623 INFO L82 PathProgramCache]: Analyzing trace with hash 429770776, now seen corresponding path program 24 times [2020-10-11 12:45:23,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:23,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361160581] [2020-10-11 12:45:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:24,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361160581] [2020-10-11 12:45:24,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472078097] [2020-10-11 12:45:24,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:28,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-11 12:45:28,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:28,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 12:45:28,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:28,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:28,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 12:45:28,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744737828] [2020-10-11 12:45:28,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 12:45:28,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:28,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 12:45:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:45:28,423 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand 31 states. [2020-10-11 12:45:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:28,464 INFO L93 Difference]: Finished difference Result 73 states and 119 transitions. [2020-10-11 12:45:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:45:28,465 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 36 [2020-10-11 12:45:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:28,466 INFO L225 Difference]: With dead ends: 73 [2020-10-11 12:45:28,466 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 12:45:28,466 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:45:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 12:45:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-11 12:45:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 12:45:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-10-11 12:45:28,469 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 36 [2020-10-11 12:45:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:28,470 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-10-11 12:45:28,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 12:45:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-10-11 12:45:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-11 12:45:28,470 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:28,471 INFO L421 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:28,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:28,672 INFO L429 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash -990696337, now seen corresponding path program 25 times [2020-10-11 12:45:28,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:28,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535370050] [2020-10-11 12:45:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:29,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535370050] [2020-10-11 12:45:29,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901742607] [2020-10-11 12:45:29,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:29,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 12:45:29,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:29,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:29,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-11 12:45:29,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33152400] [2020-10-11 12:45:29,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 12:45:29,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:29,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 12:45:29,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:45:29,456 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 32 states. [2020-10-11 12:45:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:29,522 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2020-10-11 12:45:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:45:29,523 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2020-10-11 12:45:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:29,524 INFO L225 Difference]: With dead ends: 74 [2020-10-11 12:45:29,524 INFO L226 Difference]: Without dead ends: 74 [2020-10-11 12:45:29,525 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:45:29,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-11 12:45:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-11 12:45:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 12:45:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 120 transitions. [2020-10-11 12:45:29,529 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 120 transitions. Word has length 37 [2020-10-11 12:45:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:29,530 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 120 transitions. [2020-10-11 12:45:29,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 12:45:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 120 transitions. [2020-10-11 12:45:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-11 12:45:29,531 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:29,531 INFO L421 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:29,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:29,745 INFO L429 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2075503880, now seen corresponding path program 26 times [2020-10-11 12:45:29,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:29,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836823339] [2020-10-11 12:45:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:30,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836823339] [2020-10-11 12:45:30,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214489717] [2020-10-11 12:45:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:30,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:30,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:30,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 12:45:30,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:30,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:30,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-11 12:45:30,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388090505] [2020-10-11 12:45:30,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-11 12:45:30,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:30,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-11 12:45:30,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:45:30,428 INFO L87 Difference]: Start difference. First operand 74 states and 120 transitions. Second operand 33 states. [2020-10-11 12:45:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:30,469 INFO L93 Difference]: Finished difference Result 75 states and 121 transitions. [2020-10-11 12:45:30,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 12:45:30,469 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 38 [2020-10-11 12:45:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:30,470 INFO L225 Difference]: With dead ends: 75 [2020-10-11 12:45:30,470 INFO L226 Difference]: Without dead ends: 75 [2020-10-11 12:45:30,471 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:45:30,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-11 12:45:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-11 12:45:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 12:45:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 121 transitions. [2020-10-11 12:45:30,474 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 121 transitions. Word has length 38 [2020-10-11 12:45:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:30,474 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 121 transitions. [2020-10-11 12:45:30,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-11 12:45:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 121 transitions. [2020-10-11 12:45:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-11 12:45:30,475 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:30,475 INFO L421 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:30,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:30,684 INFO L429 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:30,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1344799345, now seen corresponding path program 27 times [2020-10-11 12:45:30,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:30,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096819471] [2020-10-11 12:45:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:31,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096819471] [2020-10-11 12:45:31,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223792030] [2020-10-11 12:45:31,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:44,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-11 12:45:44,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:44,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-11 12:45:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:44,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:44,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-11 12:45:44,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078058740] [2020-10-11 12:45:44,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-11 12:45:44,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:44,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-11 12:45:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:45:44,737 INFO L87 Difference]: Start difference. First operand 75 states and 121 transitions. Second operand 34 states. [2020-10-11 12:45:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:44,781 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2020-10-11 12:45:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:45:44,781 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2020-10-11 12:45:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:44,782 INFO L225 Difference]: With dead ends: 76 [2020-10-11 12:45:44,782 INFO L226 Difference]: Without dead ends: 76 [2020-10-11 12:45:44,783 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:45:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-11 12:45:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-11 12:45:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 12:45:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 122 transitions. [2020-10-11 12:45:44,787 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 122 transitions. Word has length 39 [2020-10-11 12:45:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:44,788 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 122 transitions. [2020-10-11 12:45:44,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-11 12:45:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 122 transitions. [2020-10-11 12:45:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-11 12:45:44,788 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:44,788 INFO L421 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:44,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-11 12:45:44,991 INFO L429 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash -167795240, now seen corresponding path program 28 times [2020-10-11 12:45:44,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:44,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343770978] [2020-10-11 12:45:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:45,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343770978] [2020-10-11 12:45:45,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201367141] [2020-10-11 12:45:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:45,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-11 12:45:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:45,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:45,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-11 12:45:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032483532] [2020-10-11 12:45:45,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-11 12:45:45,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-11 12:45:45,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 12:45:45,692 INFO L87 Difference]: Start difference. First operand 76 states and 122 transitions. Second operand 35 states. [2020-10-11 12:45:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:45,750 INFO L93 Difference]: Finished difference Result 77 states and 123 transitions. [2020-10-11 12:45:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 12:45:45,751 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 40 [2020-10-11 12:45:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:45,752 INFO L225 Difference]: With dead ends: 77 [2020-10-11 12:45:45,752 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 12:45:45,752 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 12:45:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 12:45:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-11 12:45:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 12:45:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2020-10-11 12:45:45,755 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 123 transitions. Word has length 40 [2020-10-11 12:45:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:45,755 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 123 transitions. [2020-10-11 12:45:45,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-11 12:45:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 123 transitions. [2020-10-11 12:45:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-11 12:45:45,756 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:45,756 INFO L421 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:45,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:45,957 INFO L429 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1959593647, now seen corresponding path program 29 times [2020-10-11 12:45:45,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:45,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610757472] [2020-10-11 12:45:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:46,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610757472] [2020-10-11 12:45:46,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477805433] [2020-10-11 12:45:46,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:55,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-11 12:45:55,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-11 12:45:55,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:55,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:55,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-11 12:45:55,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188226867] [2020-10-11 12:45:55,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-11 12:45:55,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-11 12:45:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:45:55,531 INFO L87 Difference]: Start difference. First operand 77 states and 123 transitions. Second operand 36 states. [2020-10-11 12:45:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:55,577 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2020-10-11 12:45:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:45:55,577 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-10-11 12:45:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:55,578 INFO L225 Difference]: With dead ends: 78 [2020-10-11 12:45:55,578 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 12:45:55,579 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:45:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 12:45:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-11 12:45:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 12:45:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 124 transitions. [2020-10-11 12:45:55,581 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 124 transitions. Word has length 41 [2020-10-11 12:45:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:55,582 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 124 transitions. [2020-10-11 12:45:55,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-11 12:45:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 124 transitions. [2020-10-11 12:45:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-11 12:45:55,582 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:55,582 INFO L421 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:45:55,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-11 12:45:55,783 INFO L429 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:45:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash -810827592, now seen corresponding path program 30 times [2020-10-11 12:45:55,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:55,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436663403] [2020-10-11 12:45:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:45:56,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436663403] [2020-10-11 12:45:56,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315844261] [2020-10-11 12:45:56,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:38,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-10-11 12:46:38,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-11 12:46:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:46:38,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:38,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-11 12:46:38,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387235776] [2020-10-11 12:46:38,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-11 12:46:38,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-11 12:46:38,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:46:38,949 INFO L87 Difference]: Start difference. First operand 78 states and 124 transitions. Second operand 37 states. [2020-10-11 12:46:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:39,001 INFO L93 Difference]: Finished difference Result 79 states and 125 transitions. [2020-10-11 12:46:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 12:46:39,002 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-10-11 12:46:39,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:39,002 INFO L225 Difference]: With dead ends: 79 [2020-10-11 12:46:39,002 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 12:46:39,003 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:46:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 12:46:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-11 12:46:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 12:46:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2020-10-11 12:46:39,006 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 42 [2020-10-11 12:46:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:39,006 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2020-10-11 12:46:39,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-11 12:46:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2020-10-11 12:46:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-11 12:46:39,007 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:39,007 INFO L421 BasicCegarLoop]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:46:39,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:39,208 INFO L429 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:46:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:39,208 INFO L82 PathProgramCache]: Analyzing trace with hash -794540081, now seen corresponding path program 31 times [2020-10-11 12:46:39,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:39,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776539564] [2020-10-11 12:46:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:46:39,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776539564] [2020-10-11 12:46:39,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812928078] [2020-10-11 12:46:39,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:40,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-11 12:46:40,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:46:40,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:40,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-11 12:46:40,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894382574] [2020-10-11 12:46:40,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-11 12:46:40,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:40,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-11 12:46:40,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:46:40,040 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand 38 states. [2020-10-11 12:46:40,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:40,101 INFO L93 Difference]: Finished difference Result 80 states and 126 transitions. [2020-10-11 12:46:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 12:46:40,101 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2020-10-11 12:46:40,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:40,102 INFO L225 Difference]: With dead ends: 80 [2020-10-11 12:46:40,102 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 12:46:40,103 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:46:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 12:46:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-11 12:46:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 12:46:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2020-10-11 12:46:40,105 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 43 [2020-10-11 12:46:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:40,106 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2020-10-11 12:46:40,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-11 12:46:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2020-10-11 12:46:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-11 12:46:40,106 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:40,106 INFO L421 BasicCegarLoop]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:46:40,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 12:46:40,316 INFO L429 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:46:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:40,316 INFO L82 PathProgramCache]: Analyzing trace with hash -289627240, now seen corresponding path program 32 times [2020-10-11 12:46:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:40,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572168906] [2020-10-11 12:46:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:46:41,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572168906] [2020-10-11 12:46:41,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021535341] [2020-10-11 12:46:41,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:46:41,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:46:41,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:46:41,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-11 12:46:41,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:46:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:46:41,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:46:41,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-11 12:46:41,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25745796] [2020-10-11 12:46:41,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-11 12:46:41,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:46:41,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-11 12:46:41,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 12:46:41,164 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand 39 states. [2020-10-11 12:46:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:46:41,214 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2020-10-11 12:46:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 12:46:41,215 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2020-10-11 12:46:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:46:41,215 INFO L225 Difference]: With dead ends: 81 [2020-10-11 12:46:41,216 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 12:46:41,216 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 12:46:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 12:46:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-11 12:46:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 12:46:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 127 transitions. [2020-10-11 12:46:41,219 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 127 transitions. Word has length 44 [2020-10-11 12:46:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:46:41,219 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 127 transitions. [2020-10-11 12:46:41,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-11 12:46:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 127 transitions. [2020-10-11 12:46:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-11 12:46:41,220 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:46:41,220 INFO L421 BasicCegarLoop]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:46:41,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 12:46:41,431 INFO L429 AbstractCegarLoop]: === Iteration 39 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:46:41,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:46:41,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1817198353, now seen corresponding path program 33 times [2020-10-11 12:46:41,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:46:41,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958551861] [2020-10-11 12:46:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:46:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:46:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:46:42,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958551861] [2020-10-11 12:46:42,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191183833] [2020-10-11 12:46:42,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:02,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-10-11 12:47:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-11 12:47:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:47:03,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:03,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-11 12:47:03,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374888905] [2020-10-11 12:47:03,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-11 12:47:03,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:03,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-11 12:47:03,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:47:03,063 INFO L87 Difference]: Start difference. First operand 81 states and 127 transitions. Second operand 40 states. [2020-10-11 12:47:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:03,126 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2020-10-11 12:47:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 12:47:03,130 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 45 [2020-10-11 12:47:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:03,131 INFO L225 Difference]: With dead ends: 82 [2020-10-11 12:47:03,131 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 12:47:03,132 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:47:03,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 12:47:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-11 12:47:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 12:47:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 128 transitions. [2020-10-11 12:47:03,135 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 128 transitions. Word has length 45 [2020-10-11 12:47:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:03,135 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 128 transitions. [2020-10-11 12:47:03,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-11 12:47:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 128 transitions. [2020-10-11 12:47:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-11 12:47:03,136 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:03,136 INFO L421 BasicCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:47:03,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 12:47:03,346 INFO L429 AbstractCegarLoop]: === Iteration 40 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:47:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:03,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1927262600, now seen corresponding path program 34 times [2020-10-11 12:47:03,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:03,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227684683] [2020-10-11 12:47:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:47:04,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227684683] [2020-10-11 12:47:04,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683814720] [2020-10-11 12:47:04,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:04,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:04,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:04,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-11 12:47:04,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:47:04,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:04,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-11 12:47:04,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018971337] [2020-10-11 12:47:04,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-11 12:47:04,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:04,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-11 12:47:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:47:04,567 INFO L87 Difference]: Start difference. First operand 82 states and 128 transitions. Second operand 41 states. [2020-10-11 12:47:04,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:04,628 INFO L93 Difference]: Finished difference Result 83 states and 129 transitions. [2020-10-11 12:47:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 12:47:04,629 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 46 [2020-10-11 12:47:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:04,630 INFO L225 Difference]: With dead ends: 83 [2020-10-11 12:47:04,630 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 12:47:04,631 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:47:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 12:47:04,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-11 12:47:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 12:47:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2020-10-11 12:47:04,634 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 46 [2020-10-11 12:47:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:04,634 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2020-10-11 12:47:04,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-11 12:47:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2020-10-11 12:47:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-11 12:47:04,635 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:04,635 INFO L421 BasicCegarLoop]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:47:04,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 12:47:04,846 INFO L429 AbstractCegarLoop]: === Iteration 41 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:47:04,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:04,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1044286961, now seen corresponding path program 35 times [2020-10-11 12:47:04,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:04,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626909839] [2020-10-11 12:47:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:47:05,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626909839] [2020-10-11 12:47:05,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719381286] [2020-10-11 12:47:05,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:21,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-11 12:47:21,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:22,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-11 12:47:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:47:22,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:22,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-11 12:47:22,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634431619] [2020-10-11 12:47:22,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-11 12:47:22,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:22,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-11 12:47:22,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 12:47:22,065 INFO L87 Difference]: Start difference. First operand 83 states and 129 transitions. Second operand 42 states. [2020-10-11 12:47:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:22,139 INFO L93 Difference]: Finished difference Result 84 states and 130 transitions. [2020-10-11 12:47:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 12:47:22,139 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 47 [2020-10-11 12:47:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:22,140 INFO L225 Difference]: With dead ends: 84 [2020-10-11 12:47:22,140 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 12:47:22,141 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 12:47:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 12:47:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-11 12:47:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 12:47:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2020-10-11 12:47:22,144 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 47 [2020-10-11 12:47:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:22,144 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2020-10-11 12:47:22,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-11 12:47:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2020-10-11 12:47:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-11 12:47:22,145 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:22,145 INFO L421 BasicCegarLoop]: trace histogram [39, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:47:22,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:22,356 INFO L429 AbstractCegarLoop]: === Iteration 42 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:47:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash 558154072, now seen corresponding path program 36 times [2020-10-11 12:47:22,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:22,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572572933] [2020-10-11 12:47:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:47:23,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572572933] [2020-10-11 12:47:23,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430845048] [2020-10-11 12:47:23,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:11,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-10-11 12:48:11,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:11,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-11 12:48:11,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:11,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:11,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-11 12:48:11,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551405173] [2020-10-11 12:48:11,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-11 12:48:11,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-11 12:48:11,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 12:48:11,979 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand 43 states. [2020-10-11 12:48:12,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:12,040 INFO L93 Difference]: Finished difference Result 85 states and 131 transitions. [2020-10-11 12:48:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 12:48:12,040 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 48 [2020-10-11 12:48:12,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:12,041 INFO L225 Difference]: With dead ends: 85 [2020-10-11 12:48:12,041 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 12:48:12,042 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 12:48:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 12:48:12,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-11 12:48:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-11 12:48:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 131 transitions. [2020-10-11 12:48:12,046 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 131 transitions. Word has length 48 [2020-10-11 12:48:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:12,046 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 131 transitions. [2020-10-11 12:48:12,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-11 12:48:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 131 transitions. [2020-10-11 12:48:12,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-11 12:48:12,047 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:12,047 INFO L421 BasicCegarLoop]: trace histogram [40, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:48:12,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 12:48:12,258 INFO L429 AbstractCegarLoop]: === Iteration 43 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:48:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1305781457, now seen corresponding path program 37 times [2020-10-11 12:48:12,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:12,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354526207] [2020-10-11 12:48:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:13,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354526207] [2020-10-11 12:48:13,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252226204] [2020-10-11 12:48:13,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-11 12:48:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:13,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:13,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-10-11 12:48:13,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239055357] [2020-10-11 12:48:13,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-11 12:48:13,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:13,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-11 12:48:13,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:48:13,406 INFO L87 Difference]: Start difference. First operand 85 states and 131 transitions. Second operand 44 states. [2020-10-11 12:48:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:13,465 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2020-10-11 12:48:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 12:48:13,465 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2020-10-11 12:48:13,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:13,466 INFO L225 Difference]: With dead ends: 86 [2020-10-11 12:48:13,467 INFO L226 Difference]: Without dead ends: 86 [2020-10-11 12:48:13,467 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:48:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-11 12:48:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-11 12:48:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 12:48:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 132 transitions. [2020-10-11 12:48:13,471 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 132 transitions. Word has length 49 [2020-10-11 12:48:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:13,474 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 132 transitions. [2020-10-11 12:48:13,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-11 12:48:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 132 transitions. [2020-10-11 12:48:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-11 12:48:13,475 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:13,475 INFO L421 BasicCegarLoop]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:48:13,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:13,687 INFO L429 AbstractCegarLoop]: === Iteration 44 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:48:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1041759288, now seen corresponding path program 38 times [2020-10-11 12:48:13,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:13,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843106012] [2020-10-11 12:48:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:14,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843106012] [2020-10-11 12:48:14,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112084616] [2020-10-11 12:48:14,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:14,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:14,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-11 12:48:14,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:14,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:14,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-10-11 12:48:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26175364] [2020-10-11 12:48:14,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-11 12:48:14,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:14,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-11 12:48:14,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 12:48:14,770 INFO L87 Difference]: Start difference. First operand 86 states and 132 transitions. Second operand 45 states. [2020-10-11 12:48:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:14,832 INFO L93 Difference]: Finished difference Result 87 states and 133 transitions. [2020-10-11 12:48:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 12:48:14,833 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 50 [2020-10-11 12:48:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:14,833 INFO L225 Difference]: With dead ends: 87 [2020-10-11 12:48:14,833 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 12:48:14,834 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 12:48:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 12:48:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-11 12:48:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 12:48:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 133 transitions. [2020-10-11 12:48:14,837 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 133 transitions. Word has length 50 [2020-10-11 12:48:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:14,838 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 133 transitions. [2020-10-11 12:48:14,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-11 12:48:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 133 transitions. [2020-10-11 12:48:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-11 12:48:14,838 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:14,839 INFO L421 BasicCegarLoop]: trace histogram [42, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:48:15,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:15,050 INFO L429 AbstractCegarLoop]: === Iteration 45 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:48:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:15,050 INFO L82 PathProgramCache]: Analyzing trace with hash 801078351, now seen corresponding path program 39 times [2020-10-11 12:48:15,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:15,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742781727] [2020-10-11 12:48:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:16,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742781727] [2020-10-11 12:48:16,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9451809] [2020-10-11 12:48:16,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:19,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-10-11 12:48:19,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-11 12:48:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:19,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:19,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-10-11 12:48:19,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390692859] [2020-10-11 12:48:19,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-11 12:48:19,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:19,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-11 12:48:19,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 12:48:19,700 INFO L87 Difference]: Start difference. First operand 87 states and 133 transitions. Second operand 46 states. [2020-10-11 12:48:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:19,768 INFO L93 Difference]: Finished difference Result 88 states and 134 transitions. [2020-10-11 12:48:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 12:48:19,773 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 51 [2020-10-11 12:48:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:19,773 INFO L225 Difference]: With dead ends: 88 [2020-10-11 12:48:19,774 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 12:48:19,774 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 12:48:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 12:48:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-11 12:48:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 12:48:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-10-11 12:48:19,777 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 51 [2020-10-11 12:48:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:19,778 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-10-11 12:48:19,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-11 12:48:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-10-11 12:48:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-11 12:48:19,778 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:19,779 INFO L421 BasicCegarLoop]: trace histogram [43, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:48:19,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-11 12:48:19,988 INFO L429 AbstractCegarLoop]: === Iteration 46 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:48:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1929903896, now seen corresponding path program 40 times [2020-10-11 12:48:19,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:19,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826741016] [2020-10-11 12:48:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:21,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826741016] [2020-10-11 12:48:21,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314825811] [2020-10-11 12:48:21,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:21,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-11 12:48:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:21,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:21,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-10-11 12:48:21,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168106142] [2020-10-11 12:48:21,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-11 12:48:21,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-11 12:48:21,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 12:48:21,213 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 47 states. [2020-10-11 12:48:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:21,280 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2020-10-11 12:48:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-11 12:48:21,281 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 52 [2020-10-11 12:48:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:21,281 INFO L225 Difference]: With dead ends: 89 [2020-10-11 12:48:21,282 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 12:48:21,282 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 12:48:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 12:48:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-11 12:48:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-11 12:48:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 135 transitions. [2020-10-11 12:48:21,290 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 135 transitions. Word has length 52 [2020-10-11 12:48:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:21,290 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 135 transitions. [2020-10-11 12:48:21,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-11 12:48:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 135 transitions. [2020-10-11 12:48:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-11 12:48:21,291 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:21,291 INFO L421 BasicCegarLoop]: trace histogram [44, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:48:21,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 12:48:21,492 INFO L429 AbstractCegarLoop]: === Iteration 47 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:48:21,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:21,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1731209873, now seen corresponding path program 41 times [2020-10-11 12:48:21,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:21,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487338681] [2020-10-11 12:48:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:48:22,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487338681] [2020-10-11 12:48:22,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937316178] [2020-10-11 12:48:22,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:10,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-10-11 12:49:10,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:12,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2020-10-11 12:49:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:49:12,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:12,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-10-11 12:49:12,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387577252] [2020-10-11 12:49:12,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-11 12:49:12,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:12,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-11 12:49:12,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 12:49:12,080 INFO L87 Difference]: Start difference. First operand 89 states and 135 transitions. Second operand 48 states. [2020-10-11 12:49:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:12,155 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2020-10-11 12:49:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 12:49:12,160 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2020-10-11 12:49:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:12,161 INFO L225 Difference]: With dead ends: 90 [2020-10-11 12:49:12,161 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 12:49:12,162 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 12:49:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 12:49:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-11 12:49:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 12:49:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 136 transitions. [2020-10-11 12:49:12,165 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 136 transitions. Word has length 53 [2020-10-11 12:49:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:12,165 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 136 transitions. [2020-10-11 12:49:12,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-11 12:49:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 136 transitions. [2020-10-11 12:49:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-11 12:49:12,166 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:12,166 INFO L421 BasicCegarLoop]: trace histogram [45, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:49:12,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-11 12:49:12,378 INFO L429 AbstractCegarLoop]: === Iteration 48 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:49:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash 738380280, now seen corresponding path program 42 times [2020-10-11 12:49:12,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:12,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187575204] [2020-10-11 12:49:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:49:13,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187575204] [2020-10-11 12:49:13,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956140911] [2020-10-11 12:49:13,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:58,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-11 12:51:58,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:02,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-11 12:52:02,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:02,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:02,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-10-11 12:52:02,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237987293] [2020-10-11 12:52:02,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-11 12:52:02,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:02,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-11 12:52:02,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 12:52:02,045 INFO L87 Difference]: Start difference. First operand 90 states and 136 transitions. Second operand 49 states. [2020-10-11 12:52:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:02,121 INFO L93 Difference]: Finished difference Result 91 states and 137 transitions. [2020-10-11 12:52:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 12:52:02,121 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 54 [2020-10-11 12:52:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:02,122 INFO L225 Difference]: With dead ends: 91 [2020-10-11 12:52:02,122 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 12:52:02,122 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 12:52:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 12:52:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-11 12:52:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 12:52:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 137 transitions. [2020-10-11 12:52:02,125 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 137 transitions. Word has length 54 [2020-10-11 12:52:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:02,125 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 137 transitions. [2020-10-11 12:52:02,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-11 12:52:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 137 transitions. [2020-10-11 12:52:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-11 12:52:02,126 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:02,126 INFO L421 BasicCegarLoop]: trace histogram [46, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:52:02,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:02,336 INFO L429 AbstractCegarLoop]: === Iteration 49 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:52:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:02,336 INFO L82 PathProgramCache]: Analyzing trace with hash -13736305, now seen corresponding path program 43 times [2020-10-11 12:52:02,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:02,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025429146] [2020-10-11 12:52:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:03,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025429146] [2020-10-11 12:52:03,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834650953] [2020-10-11 12:52:03,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:03,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2020-10-11 12:52:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:03,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:03,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-10-11 12:52:03,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354064800] [2020-10-11 12:52:03,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-11 12:52:03,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-11 12:52:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 12:52:03,785 INFO L87 Difference]: Start difference. First operand 91 states and 137 transitions. Second operand 50 states. [2020-10-11 12:52:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:03,884 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2020-10-11 12:52:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-11 12:52:03,885 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 55 [2020-10-11 12:52:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:03,885 INFO L225 Difference]: With dead ends: 92 [2020-10-11 12:52:03,886 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 12:52:03,886 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 12:52:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 12:52:03,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-11 12:52:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 12:52:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 138 transitions. [2020-10-11 12:52:03,889 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 138 transitions. Word has length 55 [2020-10-11 12:52:03,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:03,890 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 138 transitions. [2020-10-11 12:52:03,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-11 12:52:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 138 transitions. [2020-10-11 12:52:03,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-11 12:52:03,891 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:03,891 INFO L421 BasicCegarLoop]: trace histogram [47, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:52:04,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 12:52:04,102 INFO L429 AbstractCegarLoop]: === Iteration 50 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:52:04,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:04,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1854513960, now seen corresponding path program 44 times [2020-10-11 12:52:04,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:04,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005756019] [2020-10-11 12:52:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:05,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005756019] [2020-10-11 12:52:05,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744505330] [2020-10-11 12:52:05,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:05,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2020-10-11 12:52:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:05,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:05,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-10-11 12:52:05,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954156633] [2020-10-11 12:52:05,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-11 12:52:05,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:05,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-11 12:52:05,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 12:52:05,730 INFO L87 Difference]: Start difference. First operand 92 states and 138 transitions. Second operand 51 states. [2020-10-11 12:52:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:05,818 INFO L93 Difference]: Finished difference Result 93 states and 139 transitions. [2020-10-11 12:52:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-11 12:52:05,818 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 56 [2020-10-11 12:52:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:05,819 INFO L225 Difference]: With dead ends: 93 [2020-10-11 12:52:05,819 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 12:52:05,820 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 12:52:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 12:52:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-11 12:52:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 12:52:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 139 transitions. [2020-10-11 12:52:05,823 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 139 transitions. Word has length 56 [2020-10-11 12:52:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:05,823 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 139 transitions. [2020-10-11 12:52:05,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-11 12:52:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 139 transitions. [2020-10-11 12:52:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-11 12:52:05,824 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:05,824 INFO L421 BasicCegarLoop]: trace histogram [48, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:52:06,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 12:52:06,037 INFO L429 AbstractCegarLoop]: === Iteration 51 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:52:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:06,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1210920879, now seen corresponding path program 45 times [2020-10-11 12:52:06,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:06,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990070448] [2020-10-11 12:52:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:07,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990070448] [2020-10-11 12:52:07,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159468758] [2020-10-11 12:52:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:14,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-10-11 12:52:14,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-11 12:52:14,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:14,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:14,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-10-11 12:52:14,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990829955] [2020-10-11 12:52:14,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-11 12:52:14,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-11 12:52:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 12:52:14,485 INFO L87 Difference]: Start difference. First operand 93 states and 139 transitions. Second operand 52 states. [2020-10-11 12:52:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:14,564 INFO L93 Difference]: Finished difference Result 94 states and 140 transitions. [2020-10-11 12:52:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-11 12:52:14,564 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 57 [2020-10-11 12:52:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:14,565 INFO L225 Difference]: With dead ends: 94 [2020-10-11 12:52:14,565 INFO L226 Difference]: Without dead ends: 94 [2020-10-11 12:52:14,566 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 12:52:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-11 12:52:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-11 12:52:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 12:52:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 140 transitions. [2020-10-11 12:52:14,569 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 140 transitions. Word has length 57 [2020-10-11 12:52:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:14,569 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 140 transitions. [2020-10-11 12:52:14,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-11 12:52:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 140 transitions. [2020-10-11 12:52:14,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-11 12:52:14,570 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:14,570 INFO L421 BasicCegarLoop]: trace histogram [49, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:52:14,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:14,781 INFO L429 AbstractCegarLoop]: === Iteration 52 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:52:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1750120376, now seen corresponding path program 46 times [2020-10-11 12:52:14,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:14,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645762981] [2020-10-11 12:52:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:16,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645762981] [2020-10-11 12:52:16,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077053479] [2020-10-11 12:52:16,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:16,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:16,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 51 conjunts are in the unsatisfiable core [2020-10-11 12:52:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:16,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:16,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-10-11 12:52:16,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100883815] [2020-10-11 12:52:16,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-11 12:52:16,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:16,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-11 12:52:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 12:52:16,406 INFO L87 Difference]: Start difference. First operand 94 states and 140 transitions. Second operand 53 states. [2020-10-11 12:52:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:16,504 INFO L93 Difference]: Finished difference Result 95 states and 141 transitions. [2020-10-11 12:52:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-11 12:52:16,504 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 58 [2020-10-11 12:52:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:16,505 INFO L225 Difference]: With dead ends: 95 [2020-10-11 12:52:16,505 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 12:52:16,506 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 12:52:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 12:52:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-11 12:52:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-11 12:52:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 141 transitions. [2020-10-11 12:52:16,508 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 141 transitions. Word has length 58 [2020-10-11 12:52:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:16,509 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 141 transitions. [2020-10-11 12:52:16,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-11 12:52:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 141 transitions. [2020-10-11 12:52:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-11 12:52:16,510 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:16,510 INFO L421 BasicCegarLoop]: trace histogram [50, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:52:16,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-11 12:52:16,720 INFO L429 AbstractCegarLoop]: === Iteration 53 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:52:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:16,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1285435599, now seen corresponding path program 47 times [2020-10-11 12:52:16,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:16,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875926388] [2020-10-11 12:52:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:52:18,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875926388] [2020-10-11 12:52:18,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324035198] [2020-10-11 12:52:18,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:13,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-10-11 12:54:13,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:16,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2020-10-11 12:54:16,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:54:16,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:16,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-10-11 12:54:16,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421175463] [2020-10-11 12:54:16,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-11 12:54:16,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:16,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-11 12:54:16,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 12:54:16,320 INFO L87 Difference]: Start difference. First operand 95 states and 141 transitions. Second operand 54 states. [2020-10-11 12:54:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:16,417 INFO L93 Difference]: Finished difference Result 96 states and 142 transitions. [2020-10-11 12:54:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-11 12:54:16,417 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 59 [2020-10-11 12:54:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:16,418 INFO L225 Difference]: With dead ends: 96 [2020-10-11 12:54:16,419 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 12:54:16,419 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 12:54:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 12:54:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-11 12:54:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 12:54:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 142 transitions. [2020-10-11 12:54:16,422 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 142 transitions. Word has length 59 [2020-10-11 12:54:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:16,423 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 142 transitions. [2020-10-11 12:54:16,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-11 12:54:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 142 transitions. [2020-10-11 12:54:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-11 12:54:16,423 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:16,423 INFO L421 BasicCegarLoop]: trace histogram [51, 2, 2, 1, 1, 1, 1, 1] [2020-10-11 12:54:16,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:16,635 INFO L429 AbstractCegarLoop]: === Iteration 54 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-11 12:54:16,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:16,635 INFO L82 PathProgramCache]: Analyzing trace with hash -234890600, now seen corresponding path program 48 times [2020-10-11 12:54:16,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:16,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377878166] [2020-10-11 12:54:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-11 12:54:18,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377878166] [2020-10-11 12:54:18,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830077820] [2020-10-11 12:54:18,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown