/usr/bin/java -Xmx8000000000 -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-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 00:37:27,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 00:37:27,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 00:37:27,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 00:37:27,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 00:37:27,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 00:37:27,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 00:37:27,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 00:37:27,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 00:37:27,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 00:37:27,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 00:37:27,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 00:37:27,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 00:37:27,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 00:37:27,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 00:37:27,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 00:37:27,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 00:37:27,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 00:37:27,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 00:37:27,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 00:37:27,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 00:37:27,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 00:37:27,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 00:37:27,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 00:37:27,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 00:37:27,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 00:37:27,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 00:37:27,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 00:37:27,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 00:37:27,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 00:37:27,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 00:37:27,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 00:37:27,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 00:37:27,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 00:37:27,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 00:37:27,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 00:37:27,861 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-15 00:37:27,911 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 00:37:27,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 00:37:27,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 00:37:27,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 00:37:27,915 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 00:37:27,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 00:37:27,915 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 00:37:27,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 00:37:27,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 00:37:27,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 00:37:27,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 00:37:27,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 00:37:27,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 00:37:27,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 00:37:27,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 00:37:27,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 00:37:27,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 00:37:27,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 00:37:27,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 00:37:27,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 00:37:27,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 00:37:27,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 00:37:27,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 00:37:27,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-15 00:37:27,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 00:37:27,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 00:37:27,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 00:37:27,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 00:37:27,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-15 00:37:27,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-15 00:37:28,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 00:37:28,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 00:37:28,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 00:37:28,420 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 00:37:28,420 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 00:37:28,422 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-15 00:37:28,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a46011e15/07502bbfcad547cdbe8a27aa4ca07f23/FLAG246795fea [2020-09-15 00:37:29,217 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 00:37:29,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-15 00:37:29,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a46011e15/07502bbfcad547cdbe8a27aa4ca07f23/FLAG246795fea [2020-09-15 00:37:29,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a46011e15/07502bbfcad547cdbe8a27aa4ca07f23 [2020-09-15 00:37:29,416 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 00:37:29,423 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 00:37:29,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 00:37:29,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 00:37:29,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 00:37:29,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:29,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee98b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:29, skipping insertion in model container [2020-09-15 00:37:29,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 12:37:29" (1/1) ... [2020-09-15 00:37:29,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 00:37:29,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 00:37:30,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 00:37:30,278 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 00:37:30,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 00:37:30,568 INFO L208 MainTranslator]: Completed translation [2020-09-15 00:37:30,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30 WrapperNode [2020-09-15 00:37:30,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 00:37:30,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 00:37:30,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 00:37:30,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 00:37:30,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... [2020-09-15 00:37:30,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... [2020-09-15 00:37:30,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 00:37:30,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 00:37:30,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 00:37:30,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 00:37:30,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... [2020-09-15 00:37:30,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... [2020-09-15 00:37:30,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... [2020-09-15 00:37:30,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... [2020-09-15 00:37:30,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... [2020-09-15 00:37:30,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... [2020-09-15 00:37:30,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... [2020-09-15 00:37:30,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 00:37:30,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 00:37:30,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 00:37:30,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 00:37:30,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:30,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 00:37:30,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 00:37:30,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-15 00:37:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-09-15 00:37:30,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-09-15 00:37:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 00:37:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 00:37:30,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 00:37:30,796 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 00:37:31,249 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 00:37:31,250 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-15 00:37:31,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 12:37:31 BoogieIcfgContainer [2020-09-15 00:37:31,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 00:37:31,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 00:37:31,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 00:37:31,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 00:37:31,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 12:37:29" (1/3) ... [2020-09-15 00:37:31,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a446884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 12:37:31, skipping insertion in model container [2020-09-15 00:37:31,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 12:37:30" (2/3) ... [2020-09-15 00:37:31,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a446884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 12:37:31, skipping insertion in model container [2020-09-15 00:37:31,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 12:37:31" (3/3) ... [2020-09-15 00:37:31,270 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-09-15 00:37:31,283 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 00:37:31,284 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-15 00:37:31,294 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 00:37:31,295 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 00:37:31,337 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,338 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,338 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,338 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,338 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,339 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,339 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,339 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,340 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,340 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,340 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,340 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,341 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,341 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,341 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,341 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,342 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,342 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,342 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,342 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,343 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,347 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,348 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,348 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,348 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,348 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,349 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,349 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,349 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 00:37:31,381 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-15 00:37:31,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 00:37:31,411 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 00:37:31,411 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-15 00:37:31,411 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 00:37:31,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 00:37:31,411 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 00:37:31,411 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 00:37:31,412 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 00:37:31,430 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-09-15 00:37:31,432 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-15 00:37:31,505 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-15 00:37:31,505 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-15 00:37:31,514 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-15 00:37:31,517 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-15 00:37:31,542 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-15 00:37:31,543 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-15 00:37:31,543 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-15 00:37:31,545 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 640 [2020-09-15 00:37:31,547 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-15 00:37:33,024 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-09-15 00:37:33,241 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-15 00:37:33,942 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-09-15 00:37:34,303 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-15 00:37:34,895 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-09-15 00:37:35,396 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-09-15 00:37:36,898 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-09-15 00:37:37,589 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-09-15 00:37:37,594 INFO L206 etLargeBlockEncoding]: Checked pairs total: 510 [2020-09-15 00:37:37,594 INFO L214 etLargeBlockEncoding]: Total number of compositions: 78 [2020-09-15 00:37:37,601 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-09-15 00:37:37,612 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-09-15 00:37:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-09-15 00:37:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 00:37:37,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:37,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:37,648 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:37,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-09-15 00:37:37,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:37,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634935299] [2020-09-15 00:37:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:37:37,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634935299] [2020-09-15 00:37:37,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 00:37:37,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 00:37:37,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946249221] [2020-09-15 00:37:37,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 00:37:37,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:37,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 00:37:37,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 00:37:37,988 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-09-15 00:37:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:38,038 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-09-15 00:37:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 00:37:38,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-15 00:37:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:38,059 INFO L225 Difference]: With dead ends: 20 [2020-09-15 00:37:38,059 INFO L226 Difference]: Without dead ends: 20 [2020-09-15 00:37:38,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 00:37:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-15 00:37:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-15 00:37:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-15 00:37:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-09-15 00:37:38,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-09-15 00:37:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:38,102 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-09-15 00:37:38,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 00:37:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-09-15 00:37:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 00:37:38,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:38,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:38,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 00:37:38,104 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:38,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-09-15 00:37:38,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:38,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180004441] [2020-09-15 00:37:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:37:38,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180004441] [2020-09-15 00:37:38,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733370376] [2020-09-15 00:37:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:38,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-15 00:37:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-15 00:37:38,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-15 00:37:38,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-09-15 00:37:38,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219507930] [2020-09-15 00:37:38,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 00:37:38,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 00:37:38,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 00:37:38,378 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-09-15 00:37:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:38,401 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-09-15 00:37:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 00:37:38,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-09-15 00:37:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:38,403 INFO L225 Difference]: With dead ends: 28 [2020-09-15 00:37:38,403 INFO L226 Difference]: Without dead ends: 28 [2020-09-15 00:37:38,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 00:37:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-15 00:37:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-09-15 00:37:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-15 00:37:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-09-15 00:37:38,410 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-09-15 00:37:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:38,411 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-09-15 00:37:38,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 00:37:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-09-15 00:37:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 00:37:38,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:38,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:38,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-15 00:37:38,622 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:38,623 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-09-15 00:37:38,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:38,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745423332] [2020-09-15 00:37:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:37:38,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745423332] [2020-09-15 00:37:38,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024865544] [2020-09-15 00:37:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-15 00:37:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-15 00:37:38,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:38,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-15 00:37:38,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748015154] [2020-09-15 00:37:38,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 00:37:38,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:38,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 00:37:38,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 00:37:38,899 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-09-15 00:37:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:39,060 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-09-15 00:37:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 00:37:39,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-15 00:37:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:39,062 INFO L225 Difference]: With dead ends: 44 [2020-09-15 00:37:39,062 INFO L226 Difference]: Without dead ends: 44 [2020-09-15 00:37:39,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-15 00:37:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-15 00:37:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-09-15 00:37:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-15 00:37:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-09-15 00:37:39,070 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-09-15 00:37:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:39,070 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-09-15 00:37:39,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 00:37:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-09-15 00:37:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 00:37:39,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:39,072 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:39,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:39,278 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:39,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-09-15 00:37:39,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:39,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570874578] [2020-09-15 00:37:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 00:37:39,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570874578] [2020-09-15 00:37:39,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846857258] [2020-09-15 00:37:39,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:39,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:37:39,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:39,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-15 00:37:39,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 00:37:39,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:39,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 00:37:39,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898584466] [2020-09-15 00:37:39,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 00:37:39,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:39,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 00:37:39,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-15 00:37:39,515 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-09-15 00:37:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:39,549 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-09-15 00:37:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 00:37:39,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-15 00:37:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:39,554 INFO L225 Difference]: With dead ends: 54 [2020-09-15 00:37:39,554 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 00:37:39,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-15 00:37:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 00:37:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-09-15 00:37:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 00:37:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-09-15 00:37:39,569 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-09-15 00:37:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:39,569 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-09-15 00:37:39,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 00:37:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-09-15 00:37:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 00:37:39,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:39,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:39,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:39,772 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-09-15 00:37:39,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:39,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445416678] [2020-09-15 00:37:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 00:37:39,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445416678] [2020-09-15 00:37:39,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567863150] [2020-09-15 00:37:39,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:40,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 00:37:40,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-15 00:37:40,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 00:37:40,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:40,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-09-15 00:37:40,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232707925] [2020-09-15 00:37:40,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 00:37:40,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:40,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 00:37:40,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-15 00:37:40,056 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-09-15 00:37:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:40,336 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-09-15 00:37:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 00:37:40,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-09-15 00:37:40,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:40,340 INFO L225 Difference]: With dead ends: 76 [2020-09-15 00:37:40,340 INFO L226 Difference]: Without dead ends: 76 [2020-09-15 00:37:40,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-09-15 00:37:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-15 00:37:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-09-15 00:37:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 00:37:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-09-15 00:37:40,356 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-09-15 00:37:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:40,356 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-09-15 00:37:40,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 00:37:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-09-15 00:37:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 00:37:40,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:40,357 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:40,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:40,559 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 4 times [2020-09-15 00:37:40,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:40,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591341] [2020-09-15 00:37:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 00:37:40,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591341] [2020-09-15 00:37:40,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376308214] [2020-09-15 00:37:40,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:40,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:37:40,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:40,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-15 00:37:40,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 00:37:40,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:40,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-09-15 00:37:40,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283229848] [2020-09-15 00:37:40,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 00:37:40,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:40,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 00:37:40,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-15 00:37:40,819 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 11 states. [2020-09-15 00:37:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:41,351 INFO L93 Difference]: Finished difference Result 102 states and 200 transitions. [2020-09-15 00:37:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 00:37:41,352 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-09-15 00:37:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:41,353 INFO L225 Difference]: With dead ends: 102 [2020-09-15 00:37:41,353 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 00:37:41,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-09-15 00:37:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 00:37:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-09-15 00:37:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 00:37:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 186 transitions. [2020-09-15 00:37:41,364 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 186 transitions. Word has length 19 [2020-09-15 00:37:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:41,365 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 186 transitions. [2020-09-15 00:37:41,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 00:37:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 186 transitions. [2020-09-15 00:37:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 00:37:41,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:41,366 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:41,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-15 00:37:41,582 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1553067533, now seen corresponding path program 5 times [2020-09-15 00:37:41,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:41,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831439299] [2020-09-15 00:37:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 00:37:41,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831439299] [2020-09-15 00:37:41,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713960972] [2020-09-15 00:37:41,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:41,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 00:37:41,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-15 00:37:41,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-15 00:37:41,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:41,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-09-15 00:37:41,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505230989] [2020-09-15 00:37:41,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 00:37:41,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 00:37:41,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-15 00:37:41,849 INFO L87 Difference]: Start difference. First operand 95 states and 186 transitions. Second operand 13 states. [2020-09-15 00:37:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:42,686 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2020-09-15 00:37:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 00:37:42,688 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-09-15 00:37:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:42,689 INFO L225 Difference]: With dead ends: 132 [2020-09-15 00:37:42,689 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 00:37:42,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=588, Invalid=1218, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 00:37:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 00:37:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-15 00:37:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-15 00:37:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 244 transitions. [2020-09-15 00:37:42,700 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 244 transitions. Word has length 22 [2020-09-15 00:37:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:42,700 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 244 transitions. [2020-09-15 00:37:42,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 00:37:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 244 transitions. [2020-09-15 00:37:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 00:37:42,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:42,702 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:42,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:42,913 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:42,914 INFO L82 PathProgramCache]: Analyzing trace with hash 390743231, now seen corresponding path program 6 times [2020-09-15 00:37:42,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:42,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946291670] [2020-09-15 00:37:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-15 00:37:43,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946291670] [2020-09-15 00:37:43,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736482536] [2020-09-15 00:37:43,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:43,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 00:37:43,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 00:37:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-15 00:37:43,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:43,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-09-15 00:37:43,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094242550] [2020-09-15 00:37:43,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 00:37:43,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 00:37:43,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-15 00:37:43,279 INFO L87 Difference]: Start difference. First operand 124 states and 244 transitions. Second operand 15 states. [2020-09-15 00:37:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:44,564 INFO L93 Difference]: Finished difference Result 166 states and 328 transitions. [2020-09-15 00:37:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-15 00:37:44,565 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-09-15 00:37:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:44,567 INFO L225 Difference]: With dead ends: 166 [2020-09-15 00:37:44,567 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 00:37:44,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1008, Invalid=2184, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 00:37:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 00:37:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2020-09-15 00:37:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-15 00:37:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 310 transitions. [2020-09-15 00:37:44,580 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 310 transitions. Word has length 25 [2020-09-15 00:37:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:44,581 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 310 transitions. [2020-09-15 00:37:44,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 00:37:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 310 transitions. [2020-09-15 00:37:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 00:37:44,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:44,583 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:44,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:44,797 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1155941881, now seen corresponding path program 7 times [2020-09-15 00:37:44,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:44,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008394288] [2020-09-15 00:37:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 00:37:44,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008394288] [2020-09-15 00:37:44,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764251981] [2020-09-15 00:37:44,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 00:37:45,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 00:37:45,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:45,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 00:37:45,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238274215] [2020-09-15 00:37:45,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 00:37:45,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 00:37:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-15 00:37:45,062 INFO L87 Difference]: Start difference. First operand 157 states and 310 transitions. Second operand 11 states. [2020-09-15 00:37:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:45,104 INFO L93 Difference]: Finished difference Result 184 states and 364 transitions. [2020-09-15 00:37:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 00:37:45,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-15 00:37:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:45,106 INFO L225 Difference]: With dead ends: 184 [2020-09-15 00:37:45,106 INFO L226 Difference]: Without dead ends: 184 [2020-09-15 00:37:45,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-15 00:37:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-15 00:37:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2020-09-15 00:37:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-15 00:37:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 346 transitions. [2020-09-15 00:37:45,117 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 346 transitions. Word has length 28 [2020-09-15 00:37:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:45,117 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 346 transitions. [2020-09-15 00:37:45,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 00:37:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 346 transitions. [2020-09-15 00:37:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 00:37:45,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:45,120 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:45,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-15 00:37:45,336 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash -768099092, now seen corresponding path program 8 times [2020-09-15 00:37:45,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:45,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48039405] [2020-09-15 00:37:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 00:37:45,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48039405] [2020-09-15 00:37:45,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728994025] [2020-09-15 00:37:45,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:45,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:37:45,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 00:37:45,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 00:37:45,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:45,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 00:37:45,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233649736] [2020-09-15 00:37:45,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 00:37:45,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:45,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 00:37:45,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-15 00:37:45,666 INFO L87 Difference]: Start difference. First operand 175 states and 346 transitions. Second operand 12 states. [2020-09-15 00:37:45,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:45,715 INFO L93 Difference]: Finished difference Result 202 states and 400 transitions. [2020-09-15 00:37:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 00:37:45,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-09-15 00:37:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:45,717 INFO L225 Difference]: With dead ends: 202 [2020-09-15 00:37:45,718 INFO L226 Difference]: Without dead ends: 202 [2020-09-15 00:37:45,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-15 00:37:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-15 00:37:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 193. [2020-09-15 00:37:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-15 00:37:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 382 transitions. [2020-09-15 00:37:45,727 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 382 transitions. Word has length 30 [2020-09-15 00:37:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:45,727 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 382 transitions. [2020-09-15 00:37:45,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 00:37:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 382 transitions. [2020-09-15 00:37:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 00:37:45,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:45,730 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:45,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:45,944 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1359430431, now seen corresponding path program 9 times [2020-09-15 00:37:45,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:45,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87044709] [2020-09-15 00:37:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 00:37:46,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87044709] [2020-09-15 00:37:46,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16334536] [2020-09-15 00:37:46,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:46,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 00:37:46,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:46,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 00:37:46,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-09-15 00:37:46,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:46,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-09-15 00:37:46,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852306845] [2020-09-15 00:37:46,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 00:37:46,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:46,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 00:37:46,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-15 00:37:46,346 INFO L87 Difference]: Start difference. First operand 193 states and 382 transitions. Second operand 19 states. [2020-09-15 00:37:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:48,870 INFO L93 Difference]: Finished difference Result 244 states and 484 transitions. [2020-09-15 00:37:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-15 00:37:48,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-09-15 00:37:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:48,872 INFO L225 Difference]: With dead ends: 244 [2020-09-15 00:37:48,872 INFO L226 Difference]: Without dead ends: 244 [2020-09-15 00:37:48,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2020-09-15 00:37:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-15 00:37:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2020-09-15 00:37:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-15 00:37:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 464 transitions. [2020-09-15 00:37:48,890 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 464 transitions. Word has length 32 [2020-09-15 00:37:48,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:48,893 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 464 transitions. [2020-09-15 00:37:48,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 00:37:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 464 transitions. [2020-09-15 00:37:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 00:37:48,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:48,896 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:49,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:37:49,097 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:49,098 INFO L82 PathProgramCache]: Analyzing trace with hash -377330477, now seen corresponding path program 10 times [2020-09-15 00:37:49,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:49,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111987273] [2020-09-15 00:37:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-15 00:37:49,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111987273] [2020-09-15 00:37:49,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135723938] [2020-09-15 00:37:49,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:49,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:37:49,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 00:37:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-15 00:37:49,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:49,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-09-15 00:37:49,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60690762] [2020-09-15 00:37:49,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 00:37:49,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 00:37:49,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-09-15 00:37:49,617 INFO L87 Difference]: Start difference. First operand 234 states and 464 transitions. Second operand 21 states. [2020-09-15 00:37:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:53,091 INFO L93 Difference]: Finished difference Result 290 states and 576 transitions. [2020-09-15 00:37:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-09-15 00:37:53,091 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-09-15 00:37:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:53,093 INFO L225 Difference]: With dead ends: 290 [2020-09-15 00:37:53,093 INFO L226 Difference]: Without dead ends: 290 [2020-09-15 00:37:53,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3905 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3510, Invalid=8262, Unknown=0, NotChecked=0, Total=11772 [2020-09-15 00:37:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-15 00:37:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 279. [2020-09-15 00:37:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-09-15 00:37:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 554 transitions. [2020-09-15 00:37:53,105 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 554 transitions. Word has length 35 [2020-09-15 00:37:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:53,106 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 554 transitions. [2020-09-15 00:37:53,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 00:37:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 554 transitions. [2020-09-15 00:37:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 00:37:53,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:53,109 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:53,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-15 00:37:53,311 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1024091301, now seen corresponding path program 11 times [2020-09-15 00:37:53,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:53,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966927245] [2020-09-15 00:37:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-15 00:37:53,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966927245] [2020-09-15 00:37:53,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462479348] [2020-09-15 00:37:53,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:53,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 00:37:53,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 00:37:53,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-09-15 00:37:53,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:53,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-09-15 00:37:53,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598104085] [2020-09-15 00:37:53,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 00:37:53,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 00:37:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-15 00:37:53,822 INFO L87 Difference]: Start difference. First operand 279 states and 554 transitions. Second operand 23 states. [2020-09-15 00:37:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:37:58,713 INFO L93 Difference]: Finished difference Result 340 states and 676 transitions. [2020-09-15 00:37:58,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-09-15 00:37:58,714 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-09-15 00:37:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:37:58,717 INFO L225 Difference]: With dead ends: 340 [2020-09-15 00:37:58,717 INFO L226 Difference]: Without dead ends: 340 [2020-09-15 00:37:58,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5877 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5005, Invalid=12025, Unknown=0, NotChecked=0, Total=17030 [2020-09-15 00:37:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-15 00:37:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2020-09-15 00:37:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-09-15 00:37:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 652 transitions. [2020-09-15 00:37:58,731 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 652 transitions. Word has length 38 [2020-09-15 00:37:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:37:58,732 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 652 transitions. [2020-09-15 00:37:58,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 00:37:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 652 transitions. [2020-09-15 00:37:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-15 00:37:58,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:37:58,733 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:37:58,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-15 00:37:58,948 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:37:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:37:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1006259789, now seen corresponding path program 12 times [2020-09-15 00:37:58,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:37:58,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613069533] [2020-09-15 00:37:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:37:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:37:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-15 00:37:59,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613069533] [2020-09-15 00:37:59,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495821739] [2020-09-15 00:37:59,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:37:59,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 00:37:59,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:37:59,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 00:37:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:37:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-09-15 00:37:59,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:37:59,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2020-09-15 00:37:59,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978233077] [2020-09-15 00:37:59,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 00:37:59,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:37:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 00:37:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-15 00:37:59,574 INFO L87 Difference]: Start difference. First operand 328 states and 652 transitions. Second operand 25 states. [2020-09-15 00:38:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:06,161 INFO L93 Difference]: Finished difference Result 394 states and 784 transitions. [2020-09-15 00:38:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-09-15 00:38:06,162 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-09-15 00:38:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:06,164 INFO L225 Difference]: With dead ends: 394 [2020-09-15 00:38:06,164 INFO L226 Difference]: Without dead ends: 394 [2020-09-15 00:38:06,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6930, Invalid=16940, Unknown=0, NotChecked=0, Total=23870 [2020-09-15 00:38:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-15 00:38:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 381. [2020-09-15 00:38:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-09-15 00:38:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 758 transitions. [2020-09-15 00:38:06,180 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 758 transitions. Word has length 41 [2020-09-15 00:38:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:06,180 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 758 transitions. [2020-09-15 00:38:06,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 00:38:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 758 transitions. [2020-09-15 00:38:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-15 00:38:06,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:06,182 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:06,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-15 00:38:06,393 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:06,394 INFO L82 PathProgramCache]: Analyzing trace with hash 519022635, now seen corresponding path program 13 times [2020-09-15 00:38:06,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:06,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502381295] [2020-09-15 00:38:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 00:38:06,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502381295] [2020-09-15 00:38:06,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861818093] [2020-09-15 00:38:06,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:06,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 00:38:06,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 00:38:06,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:06,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 00:38:06,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362041400] [2020-09-15 00:38:06,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 00:38:06,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 00:38:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 00:38:06,782 INFO L87 Difference]: Start difference. First operand 381 states and 758 transitions. Second operand 17 states. [2020-09-15 00:38:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:06,858 INFO L93 Difference]: Finished difference Result 420 states and 836 transitions. [2020-09-15 00:38:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 00:38:06,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-09-15 00:38:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:06,861 INFO L225 Difference]: With dead ends: 420 [2020-09-15 00:38:06,862 INFO L226 Difference]: Without dead ends: 420 [2020-09-15 00:38:06,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 00:38:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-09-15 00:38:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 407. [2020-09-15 00:38:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-09-15 00:38:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 810 transitions. [2020-09-15 00:38:06,878 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 810 transitions. Word has length 44 [2020-09-15 00:38:06,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:06,878 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 810 transitions. [2020-09-15 00:38:06,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 00:38:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 810 transitions. [2020-09-15 00:38:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-15 00:38:06,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:06,880 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:07,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:07,096 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:07,096 INFO L82 PathProgramCache]: Analyzing trace with hash -942483170, now seen corresponding path program 14 times [2020-09-15 00:38:07,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:07,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849903217] [2020-09-15 00:38:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 00:38:07,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849903217] [2020-09-15 00:38:07,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050889517] [2020-09-15 00:38:07,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:07,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:38:07,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:07,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 00:38:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 00:38:07,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:07,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 00:38:07,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183880629] [2020-09-15 00:38:07,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 00:38:07,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 00:38:07,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 00:38:07,544 INFO L87 Difference]: Start difference. First operand 407 states and 810 transitions. Second operand 18 states. [2020-09-15 00:38:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:07,650 INFO L93 Difference]: Finished difference Result 446 states and 888 transitions. [2020-09-15 00:38:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 00:38:07,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-09-15 00:38:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:07,653 INFO L225 Difference]: With dead ends: 446 [2020-09-15 00:38:07,654 INFO L226 Difference]: Without dead ends: 446 [2020-09-15 00:38:07,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 00:38:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-09-15 00:38:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2020-09-15 00:38:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-09-15 00:38:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 862 transitions. [2020-09-15 00:38:07,666 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 862 transitions. Word has length 46 [2020-09-15 00:38:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:07,666 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 862 transitions. [2020-09-15 00:38:07,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 00:38:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 862 transitions. [2020-09-15 00:38:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-15 00:38:07,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:07,668 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:07,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 00:38:07,881 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:07,882 INFO L82 PathProgramCache]: Analyzing trace with hash -995255983, now seen corresponding path program 15 times [2020-09-15 00:38:07,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:07,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149492911] [2020-09-15 00:38:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 00:38:08,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149492911] [2020-09-15 00:38:08,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509901941] [2020-09-15 00:38:08,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:08,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 00:38:08,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:08,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 00:38:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-09-15 00:38:08,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:08,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2020-09-15 00:38:08,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034751227] [2020-09-15 00:38:08,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 00:38:08,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 00:38:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-09-15 00:38:08,575 INFO L87 Difference]: Start difference. First operand 433 states and 862 transitions. Second operand 29 states. [2020-09-15 00:38:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:19,390 INFO L93 Difference]: Finished difference Result 508 states and 1012 transitions. [2020-09-15 00:38:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2020-09-15 00:38:19,392 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-09-15 00:38:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:19,395 INFO L225 Difference]: With dead ends: 508 [2020-09-15 00:38:19,395 INFO L226 Difference]: Without dead ends: 508 [2020-09-15 00:38:19,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15565 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=11934, Invalid=29886, Unknown=0, NotChecked=0, Total=41820 [2020-09-15 00:38:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-09-15 00:38:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 494. [2020-09-15 00:38:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-09-15 00:38:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 984 transitions. [2020-09-15 00:38:19,437 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 984 transitions. Word has length 48 [2020-09-15 00:38:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:19,437 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 984 transitions. [2020-09-15 00:38:19,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 00:38:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 984 transitions. [2020-09-15 00:38:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-15 00:38:19,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:19,439 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:19,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-15 00:38:19,655 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash -954639647, now seen corresponding path program 16 times [2020-09-15 00:38:19,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:19,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436908878] [2020-09-15 00:38:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-15 00:38:19,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436908878] [2020-09-15 00:38:19,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995825923] [2020-09-15 00:38:19,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:20,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:38:20,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:20,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 00:38:20,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-15 00:38:20,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:20,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 00:38:20,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451690424] [2020-09-15 00:38:20,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 00:38:20,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:20,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 00:38:20,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 00:38:20,131 INFO L87 Difference]: Start difference. First operand 494 states and 984 transitions. Second operand 20 states. [2020-09-15 00:38:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:20,219 INFO L93 Difference]: Finished difference Result 536 states and 1068 transitions. [2020-09-15 00:38:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 00:38:20,219 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-09-15 00:38:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:20,222 INFO L225 Difference]: With dead ends: 536 [2020-09-15 00:38:20,223 INFO L226 Difference]: Without dead ends: 536 [2020-09-15 00:38:20,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 00:38:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-15 00:38:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-15 00:38:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-15 00:38:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1040 transitions. [2020-09-15 00:38:20,235 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1040 transitions. Word has length 51 [2020-09-15 00:38:20,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:20,235 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 1040 transitions. [2020-09-15 00:38:20,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 00:38:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1040 transitions. [2020-09-15 00:38:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-15 00:38:20,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:20,237 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:20,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 00:38:20,450 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1140997490, now seen corresponding path program 17 times [2020-09-15 00:38:20,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:20,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741715743] [2020-09-15 00:38:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-15 00:38:20,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741715743] [2020-09-15 00:38:20,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569567740] [2020-09-15 00:38:20,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:20,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-09-15 00:38:20,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:20,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 00:38:20,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-09-15 00:38:21,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:21,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2020-09-15 00:38:21,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480455877] [2020-09-15 00:38:21,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 00:38:21,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:21,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 00:38:21,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-09-15 00:38:21,221 INFO L87 Difference]: Start difference. First operand 522 states and 1040 transitions. Second operand 32 states. [2020-09-15 00:38:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:36,943 INFO L93 Difference]: Finished difference Result 604 states and 1204 transitions. [2020-09-15 00:38:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2020-09-15 00:38:36,944 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 53 [2020-09-15 00:38:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:36,947 INFO L225 Difference]: With dead ends: 604 [2020-09-15 00:38:36,947 INFO L226 Difference]: Without dead ends: 604 [2020-09-15 00:38:36,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23424 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=17290, Invalid=43966, Unknown=0, NotChecked=0, Total=61256 [2020-09-15 00:38:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-09-15 00:38:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 589. [2020-09-15 00:38:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-09-15 00:38:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1174 transitions. [2020-09-15 00:38:36,964 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1174 transitions. Word has length 53 [2020-09-15 00:38:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:36,964 INFO L479 AbstractCegarLoop]: Abstraction has 589 states and 1174 transitions. [2020-09-15 00:38:36,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 00:38:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1174 transitions. [2020-09-15 00:38:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-15 00:38:36,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:36,966 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:37,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:37,180 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash 625395594, now seen corresponding path program 18 times [2020-09-15 00:38:37,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:37,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404715224] [2020-09-15 00:38:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-15 00:38:37,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404715224] [2020-09-15 00:38:37,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801731215] [2020-09-15 00:38:37,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:37,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-15 00:38:37,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 00:38:37,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-09-15 00:38:38,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:38,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 34 [2020-09-15 00:38:38,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697346949] [2020-09-15 00:38:38,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 00:38:38,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 00:38:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 00:38:38,085 INFO L87 Difference]: Start difference. First operand 589 states and 1174 transitions. Second operand 34 states. [2020-09-15 00:38:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:58,342 INFO L93 Difference]: Finished difference Result 676 states and 1348 transitions. [2020-09-15 00:38:58,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2020-09-15 00:38:58,343 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-09-15 00:38:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:58,347 INFO L225 Difference]: With dead ends: 676 [2020-09-15 00:38:58,347 INFO L226 Difference]: Without dead ends: 676 [2020-09-15 00:38:58,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30615 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=22050, Invalid=56630, Unknown=0, NotChecked=0, Total=78680 [2020-09-15 00:38:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-09-15 00:38:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2020-09-15 00:38:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2020-09-15 00:38:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1316 transitions. [2020-09-15 00:38:58,364 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1316 transitions. Word has length 56 [2020-09-15 00:38:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:58,365 INFO L479 AbstractCegarLoop]: Abstraction has 660 states and 1316 transitions. [2020-09-15 00:38:58,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 00:38:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1316 transitions. [2020-09-15 00:38:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-15 00:38:58,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:58,367 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:58,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:38:58,582 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:58,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:58,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1598900536, now seen corresponding path program 19 times [2020-09-15 00:38:58,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:58,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548746456] [2020-09-15 00:38:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-15 00:38:59,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548746456] [2020-09-15 00:38:59,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090940219] [2020-09-15 00:38:59,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:59,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 00:38:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:38:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-15 00:38:59,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:38:59,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 00:38:59,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028708273] [2020-09-15 00:38:59,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 00:38:59,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:38:59,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 00:38:59,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 00:38:59,175 INFO L87 Difference]: Start difference. First operand 660 states and 1316 transitions. Second operand 23 states. [2020-09-15 00:38:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:38:59,295 INFO L93 Difference]: Finished difference Result 692 states and 1380 transitions. [2020-09-15 00:38:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 00:38:59,296 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-09-15 00:38:59,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:38:59,299 INFO L225 Difference]: With dead ends: 692 [2020-09-15 00:38:59,300 INFO L226 Difference]: Without dead ends: 692 [2020-09-15 00:38:59,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 00:38:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-09-15 00:38:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 692. [2020-09-15 00:38:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-09-15 00:38:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1380 transitions. [2020-09-15 00:38:59,316 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1380 transitions. Word has length 59 [2020-09-15 00:38:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:38:59,316 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 1380 transitions. [2020-09-15 00:38:59,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 00:38:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1380 transitions. [2020-09-15 00:38:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-15 00:38:59,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:38:59,319 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:38:59,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-15 00:38:59,534 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:38:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:38:59,535 INFO L82 PathProgramCache]: Analyzing trace with hash 746529141, now seen corresponding path program 20 times [2020-09-15 00:38:59,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:38:59,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890520274] [2020-09-15 00:38:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:38:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:38:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-15 00:38:59,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890520274] [2020-09-15 00:38:59,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234688716] [2020-09-15 00:38:59,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:38:59,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 00:38:59,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:38:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2020-09-15 00:38:59,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:39:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:39:02,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:39:02,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 54] total 70 [2020-09-15 00:39:02,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536335719] [2020-09-15 00:39:02,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-15 00:39:02,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:39:02,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-15 00:39:02,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 00:39:02,472 INFO L87 Difference]: Start difference. First operand 692 states and 1380 transitions. Second operand 70 states. [2020-09-15 00:41:16,230 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-09-15 00:42:05,870 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-09-15 00:47:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:47:59,808 INFO L93 Difference]: Finished difference Result 38046 states and 76072 transitions. [2020-09-15 00:47:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3033 states. [2020-09-15 00:47:59,812 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 61 [2020-09-15 00:47:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:47:59,962 INFO L225 Difference]: With dead ends: 38046 [2020-09-15 00:47:59,962 INFO L226 Difference]: Without dead ends: 38018 [2020-09-15 00:48:00,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3485 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 3044 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217742 ImplicationChecksByTransitivity, 476.7s TimeCoverageRelationStatistics Valid=2254412, Invalid=7020658, Unknown=0, NotChecked=0, Total=9275070 [2020-09-15 00:48:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38018 states. [2020-09-15 00:48:00,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38018 to 1389. [2020-09-15 00:48:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1389 states. [2020-09-15 00:48:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 2931 transitions. [2020-09-15 00:48:00,558 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 2931 transitions. Word has length 61 [2020-09-15 00:48:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:48:00,559 INFO L479 AbstractCegarLoop]: Abstraction has 1389 states and 2931 transitions. [2020-09-15 00:48:00,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-15 00:48:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 2931 transitions. [2020-09-15 00:48:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-15 00:48:00,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:48:00,565 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:48:00,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-15 00:48:00,779 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:48:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:48:00,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1697933392, now seen corresponding path program 21 times [2020-09-15 00:48:00,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:48:00,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938174617] [2020-09-15 00:48:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:48:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:48:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 20 proven. 105 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-15 00:48:01,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938174617] [2020-09-15 00:48:01,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941747170] [2020-09-15 00:48:01,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:48:01,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 00:48:01,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:48:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 00:48:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:48:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 20 proven. 105 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-15 00:48:01,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:48:01,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 00:48:01,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716796749] [2020-09-15 00:48:01,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 00:48:01,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:48:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 00:48:01,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 00:48:01,749 INFO L87 Difference]: Start difference. First operand 1389 states and 2931 transitions. Second operand 18 states. [2020-09-15 00:48:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 00:48:02,053 INFO L93 Difference]: Finished difference Result 1604 states and 3256 transitions. [2020-09-15 00:48:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 00:48:02,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-09-15 00:48:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 00:48:02,078 INFO L225 Difference]: With dead ends: 1604 [2020-09-15 00:48:02,078 INFO L226 Difference]: Without dead ends: 1604 [2020-09-15 00:48:02,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 00:48:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2020-09-15 00:48:02,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1471. [2020-09-15 00:48:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2020-09-15 00:48:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3095 transitions. [2020-09-15 00:48:02,129 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3095 transitions. Word has length 62 [2020-09-15 00:48:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 00:48:02,129 INFO L479 AbstractCegarLoop]: Abstraction has 1471 states and 3095 transitions. [2020-09-15 00:48:02,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 00:48:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3095 transitions. [2020-09-15 00:48:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-15 00:48:02,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 00:48:02,137 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 00:48:02,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 00:48:02,352 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 00:48:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 00:48:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1126694101, now seen corresponding path program 22 times [2020-09-15 00:48:02,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 00:48:02,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854489261] [2020-09-15 00:48:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 00:48:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 00:48:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 20 proven. 120 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-15 00:48:03,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854489261] [2020-09-15 00:48:03,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926584148] [2020-09-15 00:48:03,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 00:48:03,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 00:48:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 00:48:03,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2020-09-15 00:48:03,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 00:48:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 00:48:10,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 00:48:10,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 56] total 74 [2020-09-15 00:48:10,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278850860] [2020-09-15 00:48:10,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-15 00:48:10,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 00:48:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-15 00:48:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=4317, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 00:48:10,446 INFO L87 Difference]: Start difference. First operand 1471 states and 3095 transitions. Second operand 74 states.