/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 18:57:22,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 18:57:22,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 18:57:22,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 18:57:22,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 18:57:22,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 18:57:22,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 18:57:22,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 18:57:22,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 18:57:22,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 18:57:22,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 18:57:22,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 18:57:22,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 18:57:22,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 18:57:22,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 18:57:22,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 18:57:22,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 18:57:22,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 18:57:22,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 18:57:22,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 18:57:22,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 18:57:22,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 18:57:22,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 18:57:22,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 18:57:22,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-11 18:57:22,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-11 18:57:22,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-11 18:57:22,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-11 18:57:22,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-11 18:57:22,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-11 18:57:22,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 18:57:22,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 18:57:22,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 18:57:22,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 18:57:22,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 18:57:22,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 18:57:22,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 18:57:22,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 18:57:22,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 18:57:22,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 18:57:22,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 18:57:22,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-11-11 18:57:23,001 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 18:57:23,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 18:57:23,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 18:57:23,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 18:57:23,004 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 18:57:23,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 18:57:23,006 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 18:57:23,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 18:57:23,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 18:57:23,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 18:57:23,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 18:57:23,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 18:57:23,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 18:57:23,008 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 18:57:23,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 18:57:23,009 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 18:57:23,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 18:57:23,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 18:57:23,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 18:57:23,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 18:57:23,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 18:57:23,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 18:57:23,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 18:57:23,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 18:57:23,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 18:57:23,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 18:57:23,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 18:57:23,012 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-11 18:57:23,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 18:57:23,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 18:57:23,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 18:57:23,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 18:57:23,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 18:57:23,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 18:57:23,444 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 18:57:23,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-11-11 18:57:23,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314c69f9e/60258a720cdc4bc281c19aaac329bddd/FLAG8c8bdbc6b [2020-11-11 18:57:24,397 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 18:57:24,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-11-11 18:57:24,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314c69f9e/60258a720cdc4bc281c19aaac329bddd/FLAG8c8bdbc6b [2020-11-11 18:57:24,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314c69f9e/60258a720cdc4bc281c19aaac329bddd [2020-11-11 18:57:24,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 18:57:24,617 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 18:57:24,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 18:57:24,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 18:57:24,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 18:57:24,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 06:57:24" (1/1) ... [2020-11-11 18:57:24,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b4b85c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:24, skipping insertion in model container [2020-11-11 18:57:24,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 06:57:24" (1/1) ... [2020-11-11 18:57:24,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 18:57:24,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 18:57:25,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 18:57:25,363 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 18:57:25,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 18:57:25,708 INFO L208 MainTranslator]: Completed translation [2020-11-11 18:57:25,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25 WrapperNode [2020-11-11 18:57:25,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 18:57:25,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 18:57:25,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 18:57:25,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 18:57:25,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... [2020-11-11 18:57:25,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... [2020-11-11 18:57:25,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 18:57:25,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 18:57:25,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 18:57:25,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 18:57:25,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... [2020-11-11 18:57:25,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... [2020-11-11 18:57:25,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... [2020-11-11 18:57:25,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... [2020-11-11 18:57:25,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... [2020-11-11 18:57:25,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... [2020-11-11 18:57:25,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... [2020-11-11 18:57:25,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 18:57:25,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 18:57:25,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 18:57:25,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 18:57:25,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 18:57:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 18:57:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 18:57:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-11 18:57:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-11-11 18:57:25,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-11-11 18:57:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 18:57:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 18:57:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 18:57:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 18:57:25,887 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 18:57:26,405 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 18:57:26,405 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-11 18:57:26,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 06:57:26 BoogieIcfgContainer [2020-11-11 18:57:26,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 18:57:26,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 18:57:26,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 18:57:26,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 18:57:26,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 06:57:24" (1/3) ... [2020-11-11 18:57:26,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b860429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 06:57:26, skipping insertion in model container [2020-11-11 18:57:26,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 06:57:25" (2/3) ... [2020-11-11 18:57:26,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b860429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 06:57:26, skipping insertion in model container [2020-11-11 18:57:26,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 06:57:26" (3/3) ... [2020-11-11 18:57:26,417 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-11-11 18:57:26,435 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 18:57:26,435 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 18:57:26,440 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 18:57:26,441 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 18:57:26,474 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,474 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,475 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,475 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,475 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,476 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,476 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,476 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,476 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,477 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,477 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,477 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,477 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,478 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,478 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,478 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,478 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,479 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,479 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,479 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,480 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,480 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,480 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,480 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,481 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,481 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,481 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,481 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,482 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,482 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,482 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,482 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,483 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,483 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,483 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,483 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,484 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,484 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,484 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,484 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,485 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,485 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,487 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,488 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,488 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,488 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,489 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,489 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,489 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,490 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 18:57:26,500 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-11-11 18:57:26,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-11 18:57:26,542 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 18:57:26,542 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 18:57:26,542 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 18:57:26,543 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 18:57:26,543 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 18:57:26,543 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 18:57:26,543 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 18:57:26,543 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 18:57:26,558 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 90 places, 94 transitions, 196 flow [2020-11-11 18:57:26,589 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 324 states, 322 states have (on average 2.0031055900621118) internal successors, (645), 323 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 324 states, 322 states have (on average 2.0031055900621118) internal successors, (645), 323 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-11 18:57:26,612 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:26,613 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:26,614 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash 771022703, now seen corresponding path program 1 times [2020-11-11 18:57:26,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:26,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773372051] [2020-11-11 18:57:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 18:57:26,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773372051] [2020-11-11 18:57:27,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 18:57:27,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-11 18:57:27,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657421131] [2020-11-11 18:57:27,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-11 18:57:27,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:27,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-11 18:57:27,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-11 18:57:27,028 INFO L87 Difference]: Start difference. First operand has 324 states, 322 states have (on average 2.0031055900621118) internal successors, (645), 323 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:27,058 INFO L93 Difference]: Finished difference Result 315 states and 585 transitions. [2020-11-11 18:57:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-11 18:57:27,060 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2020-11-11 18:57:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:27,077 INFO L225 Difference]: With dead ends: 315 [2020-11-11 18:57:27,077 INFO L226 Difference]: Without dead ends: 282 [2020-11-11 18:57:27,079 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-11 18:57:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-11-11 18:57:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-11-11 18:57:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.8576512455516014) internal successors, (522), 281 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 522 transitions. [2020-11-11 18:57:27,159 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 522 transitions. Word has length 60 [2020-11-11 18:57:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:27,160 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 522 transitions. [2020-11-11 18:57:27,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 522 transitions. [2020-11-11 18:57:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-11 18:57:27,165 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:27,166 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:27,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 18:57:27,166 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash 704015950, now seen corresponding path program 1 times [2020-11-11 18:57:27,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:27,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78997540] [2020-11-11 18:57:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 18:57:27,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78997540] [2020-11-11 18:57:27,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 18:57:27,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 18:57:27,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367506579] [2020-11-11 18:57:27,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-11 18:57:27,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:27,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-11 18:57:27,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-11 18:57:27,341 INFO L87 Difference]: Start difference. First operand 282 states and 522 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:27,372 INFO L93 Difference]: Finished difference Result 394 states and 746 transitions. [2020-11-11 18:57:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-11 18:57:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2020-11-11 18:57:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:27,377 INFO L225 Difference]: With dead ends: 394 [2020-11-11 18:57:27,378 INFO L226 Difference]: Without dead ends: 394 [2020-11-11 18:57:27,378 INFO L749 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 [2020-11-11 18:57:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-11-11 18:57:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 298. [2020-11-11 18:57:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.8653198653198653) internal successors, (554), 297 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 554 transitions. [2020-11-11 18:57:27,407 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 554 transitions. Word has length 60 [2020-11-11 18:57:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:27,407 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 554 transitions. [2020-11-11 18:57:27,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 554 transitions. [2020-11-11 18:57:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-11 18:57:27,412 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:27,413 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:27,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 18:57:27,413 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash -727102181, now seen corresponding path program 1 times [2020-11-11 18:57:27,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:27,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919459610] [2020-11-11 18:57:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 18:57:27,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919459610] [2020-11-11 18:57:27,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 18:57:27,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 18:57:27,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952730467] [2020-11-11 18:57:27,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-11 18:57:27,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:27,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-11 18:57:27,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-11 18:57:27,516 INFO L87 Difference]: Start difference. First operand 298 states and 554 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:27,541 INFO L93 Difference]: Finished difference Result 362 states and 682 transitions. [2020-11-11 18:57:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-11 18:57:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2020-11-11 18:57:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:27,545 INFO L225 Difference]: With dead ends: 362 [2020-11-11 18:57:27,545 INFO L226 Difference]: Without dead ends: 362 [2020-11-11 18:57:27,546 INFO L749 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 [2020-11-11 18:57:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-11-11 18:57:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 314. [2020-11-11 18:57:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.8722044728434504) internal successors, (586), 313 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 586 transitions. [2020-11-11 18:57:27,565 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 586 transitions. Word has length 68 [2020-11-11 18:57:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:27,566 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 586 transitions. [2020-11-11 18:57:27,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 586 transitions. [2020-11-11 18:57:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-11 18:57:27,569 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:27,570 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:27,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 18:57:27,570 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:27,571 INFO L82 PathProgramCache]: Analyzing trace with hash -713068941, now seen corresponding path program 1 times [2020-11-11 18:57:27,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:27,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838085163] [2020-11-11 18:57:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 18:57:27,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838085163] [2020-11-11 18:57:27,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350804543] [2020-11-11 18:57:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:57:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:27,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-11 18:57:27,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:57:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 18:57:27,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:57:27,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-11 18:57:27,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280175453] [2020-11-11 18:57:27,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 18:57:27,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:27,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 18:57:27,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-11 18:57:27,970 INFO L87 Difference]: Start difference. First operand 314 states and 586 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:28,416 INFO L93 Difference]: Finished difference Result 792 states and 1542 transitions. [2020-11-11 18:57:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 18:57:28,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2020-11-11 18:57:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:28,422 INFO L225 Difference]: With dead ends: 792 [2020-11-11 18:57:28,423 INFO L226 Difference]: Without dead ends: 792 [2020-11-11 18:57:28,424 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-11-11 18:57:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-11-11 18:57:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 570. [2020-11-11 18:57:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.929701230228471) internal successors, (1098), 569 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1098 transitions. [2020-11-11 18:57:28,452 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1098 transitions. Word has length 73 [2020-11-11 18:57:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:28,453 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 1098 transitions. [2020-11-11 18:57:28,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1098 transitions. [2020-11-11 18:57:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 18:57:28,457 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:28,457 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:28,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:57:28,672 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash -83997130, now seen corresponding path program 2 times [2020-11-11 18:57:28,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:28,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834242955] [2020-11-11 18:57:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-11 18:57:28,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834242955] [2020-11-11 18:57:28,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481099279] [2020-11-11 18:57:28,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:57:29,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 18:57:29,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:57:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-11 18:57:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:57:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-11 18:57:29,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:57:29,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-11 18:57:29,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437813626] [2020-11-11 18:57:29,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 18:57:29,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:29,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 18:57:29,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-11 18:57:29,068 INFO L87 Difference]: Start difference. First operand 570 states and 1098 transitions. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:29,158 INFO L93 Difference]: Finished difference Result 878 states and 1714 transitions. [2020-11-11 18:57:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 18:57:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 18:57:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:29,164 INFO L225 Difference]: With dead ends: 878 [2020-11-11 18:57:29,165 INFO L226 Difference]: Without dead ends: 878 [2020-11-11 18:57:29,165 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-11-11 18:57:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-11-11 18:57:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 746. [2020-11-11 18:57:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 1.9463087248322148) internal successors, (1450), 745 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1450 transitions. [2020-11-11 18:57:29,192 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1450 transitions. Word has length 86 [2020-11-11 18:57:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:29,192 INFO L481 AbstractCegarLoop]: Abstraction has 746 states and 1450 transitions. [2020-11-11 18:57:29,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1450 transitions. [2020-11-11 18:57:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-11 18:57:29,196 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:29,196 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:29,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:57:29,410 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:29,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1993740975, now seen corresponding path program 3 times [2020-11-11 18:57:29,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:29,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047814016] [2020-11-11 18:57:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-11 18:57:29,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047814016] [2020-11-11 18:57:29,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347820279] [2020-11-11 18:57:29,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:57:29,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 18:57:29,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:57:29,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 18:57:29,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:57:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-11 18:57:29,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:57:29,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2020-11-11 18:57:29,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898006682] [2020-11-11 18:57:29,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 18:57:29,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:29,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 18:57:29,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-11 18:57:29,857 INFO L87 Difference]: Start difference. First operand 746 states and 1450 transitions. Second operand has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:32,042 INFO L93 Difference]: Finished difference Result 1422 states and 2802 transitions. [2020-11-11 18:57:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-11-11 18:57:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2020-11-11 18:57:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:32,051 INFO L225 Difference]: With dead ends: 1422 [2020-11-11 18:57:32,051 INFO L226 Difference]: Without dead ends: 1422 [2020-11-11 18:57:32,055 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3382 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2000, Invalid=6742, Unknown=0, NotChecked=0, Total=8742 [2020-11-11 18:57:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2020-11-11 18:57:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1122. [2020-11-11 18:57:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.9643175735950045) internal successors, (2202), 1121 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2202 transitions. [2020-11-11 18:57:32,092 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2202 transitions. Word has length 94 [2020-11-11 18:57:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:32,093 INFO L481 AbstractCegarLoop]: Abstraction has 1122 states and 2202 transitions. [2020-11-11 18:57:32,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2202 transitions. [2020-11-11 18:57:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-11 18:57:32,096 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:32,096 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:32,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:57:32,311 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1997409476, now seen corresponding path program 4 times [2020-11-11 18:57:32,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:32,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058583046] [2020-11-11 18:57:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-11 18:57:32,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058583046] [2020-11-11 18:57:32,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216379825] [2020-11-11 18:57:32,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:57:32,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 18:57:32,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:57:32,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 18:57:32,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:57:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-11 18:57:32,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:57:32,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-11 18:57:32,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752394948] [2020-11-11 18:57:32,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 18:57:32,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:32,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 18:57:32,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-11 18:57:32,597 INFO L87 Difference]: Start difference. First operand 1122 states and 2202 transitions. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:32,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:32,819 INFO L93 Difference]: Finished difference Result 1442 states and 2842 transitions. [2020-11-11 18:57:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 18:57:32,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2020-11-11 18:57:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:32,833 INFO L225 Difference]: With dead ends: 1442 [2020-11-11 18:57:32,834 INFO L226 Difference]: Without dead ends: 1442 [2020-11-11 18:57:32,841 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-11-11 18:57:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2020-11-11 18:57:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1322. [2020-11-11 18:57:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.9697199091597275) internal successors, (2602), 1321 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2602 transitions. [2020-11-11 18:57:32,883 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2602 transitions. Word has length 107 [2020-11-11 18:57:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:32,884 INFO L481 AbstractCegarLoop]: Abstraction has 1322 states and 2602 transitions. [2020-11-11 18:57:32,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2602 transitions. [2020-11-11 18:57:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-11 18:57:32,888 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:32,888 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:33,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:57:33,094 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:33,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:33,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1613784980, now seen corresponding path program 5 times [2020-11-11 18:57:33,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:33,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532152090] [2020-11-11 18:57:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-11 18:57:33,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532152090] [2020-11-11 18:57:33,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960881032] [2020-11-11 18:57:33,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:57:33,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 18:57:33,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:57:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 18:57:33,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:57:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-11 18:57:33,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:57:33,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-11 18:57:33,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958749551] [2020-11-11 18:57:33,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 18:57:33,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 18:57:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-11 18:57:33,405 INFO L87 Difference]: Start difference. First operand 1322 states and 2602 transitions. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:33,579 INFO L93 Difference]: Finished difference Result 1642 states and 3242 transitions. [2020-11-11 18:57:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 18:57:33,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2020-11-11 18:57:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:33,590 INFO L225 Difference]: With dead ends: 1642 [2020-11-11 18:57:33,590 INFO L226 Difference]: Without dead ends: 1642 [2020-11-11 18:57:33,591 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-11-11 18:57:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-11-11 18:57:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1522. [2020-11-11 18:57:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 1.9737015121630506) internal successors, (3002), 1521 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 3002 transitions. [2020-11-11 18:57:33,641 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 3002 transitions. Word has length 112 [2020-11-11 18:57:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:33,642 INFO L481 AbstractCegarLoop]: Abstraction has 1522 states and 3002 transitions. [2020-11-11 18:57:33,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 3002 transitions. [2020-11-11 18:57:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-11 18:57:33,648 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:33,648 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:33,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:57:33,862 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:33,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:33,863 INFO L82 PathProgramCache]: Analyzing trace with hash 402331076, now seen corresponding path program 6 times [2020-11-11 18:57:33,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:33,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869289294] [2020-11-11 18:57:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-11 18:57:34,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869289294] [2020-11-11 18:57:34,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802426604] [2020-11-11 18:57:34,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:57:34,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 18:57:34,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:57:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 18:57:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:57:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-11-11 18:57:34,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:57:34,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-11-11 18:57:34,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784614880] [2020-11-11 18:57:34,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 18:57:34,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:34,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 18:57:34,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-11-11 18:57:34,419 INFO L87 Difference]: Start difference. First operand 1522 states and 3002 transitions. Second operand has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:44,069 INFO L93 Difference]: Finished difference Result 2472 states and 4902 transitions. [2020-11-11 18:57:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2020-11-11 18:57:44,069 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2020-11-11 18:57:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:44,082 INFO L225 Difference]: With dead ends: 2472 [2020-11-11 18:57:44,082 INFO L226 Difference]: Without dead ends: 2472 [2020-11-11 18:57:44,110 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27719 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12186, Invalid=49070, Unknown=0, NotChecked=0, Total=61256 [2020-11-11 18:57:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2020-11-11 18:57:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2058. [2020-11-11 18:57:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 1.9805542051531357) internal successors, (4074), 2057 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 4074 transitions. [2020-11-11 18:57:44,186 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 4074 transitions. Word has length 117 [2020-11-11 18:57:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:44,187 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 4074 transitions. [2020-11-11 18:57:44,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 4074 transitions. [2020-11-11 18:57:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-11 18:57:44,194 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:44,194 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:44,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:57:44,408 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1345701753, now seen corresponding path program 7 times [2020-11-11 18:57:44,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:44,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992713936] [2020-11-11 18:57:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 29 proven. 81 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-11-11 18:57:44,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992713936] [2020-11-11 18:57:44,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451496642] [2020-11-11 18:57:44,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:57:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:44,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 18:57:44,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:57:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 29 proven. 81 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-11-11 18:57:44,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:57:44,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 18:57:44,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336970829] [2020-11-11 18:57:44,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 18:57:44,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:44,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 18:57:44,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-11 18:57:44,924 INFO L87 Difference]: Start difference. First operand 2058 states and 4074 transitions. Second operand has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:45,238 INFO L93 Difference]: Finished difference Result 2442 states and 4842 transitions. [2020-11-11 18:57:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 18:57:45,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2020-11-11 18:57:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:45,253 INFO L225 Difference]: With dead ends: 2442 [2020-11-11 18:57:45,255 INFO L226 Difference]: Without dead ends: 2442 [2020-11-11 18:57:45,255 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-11-11 18:57:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2020-11-11 18:57:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2298. [2020-11-11 18:57:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 1.9825859817152809) internal successors, (4554), 2297 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 4554 transitions. [2020-11-11 18:57:45,326 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 4554 transitions. Word has length 130 [2020-11-11 18:57:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:45,327 INFO L481 AbstractCegarLoop]: Abstraction has 2298 states and 4554 transitions. [2020-11-11 18:57:45,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 4554 transitions. [2020-11-11 18:57:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-11 18:57:45,334 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:45,334 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:45,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 18:57:45,547 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2005012447, now seen corresponding path program 8 times [2020-11-11 18:57:45,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:45,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570729718] [2020-11-11 18:57:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 29 proven. 112 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-11-11 18:57:45,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570729718] [2020-11-11 18:57:45,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380295214] [2020-11-11 18:57:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:57:45,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 18:57:45,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:57:45,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 18:57:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:57:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 29 proven. 112 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-11-11 18:57:46,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:57:46,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 18:57:46,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238935116] [2020-11-11 18:57:46,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 18:57:46,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:46,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 18:57:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-11-11 18:57:46,020 INFO L87 Difference]: Start difference. First operand 2298 states and 4554 transitions. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:57:46,361 INFO L93 Difference]: Finished difference Result 2682 states and 5322 transitions. [2020-11-11 18:57:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 18:57:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2020-11-11 18:57:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:57:46,376 INFO L225 Difference]: With dead ends: 2682 [2020-11-11 18:57:46,376 INFO L226 Difference]: Without dead ends: 2682 [2020-11-11 18:57:46,377 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 18:57:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2020-11-11 18:57:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2538. [2020-11-11 18:57:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 1.9842333464722113) internal successors, (5034), 2537 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 5034 transitions. [2020-11-11 18:57:46,445 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 5034 transitions. Word has length 135 [2020-11-11 18:57:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:57:46,445 INFO L481 AbstractCegarLoop]: Abstraction has 2538 states and 5034 transitions. [2020-11-11 18:57:46,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:57:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 5034 transitions. [2020-11-11 18:57:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-11-11 18:57:46,453 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:57:46,453 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:57:46,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-11 18:57:46,668 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:57:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:57:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1648562055, now seen corresponding path program 9 times [2020-11-11 18:57:46,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:57:46,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187330760] [2020-11-11 18:57:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:57:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:57:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 148 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-11-11 18:57:46,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187330760] [2020-11-11 18:57:46,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295109600] [2020-11-11 18:57:46,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:57:47,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 18:57:47,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:57:47,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 18:57:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:57:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-11-11 18:57:47,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:57:47,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2020-11-11 18:57:47,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190961339] [2020-11-11 18:57:47,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 18:57:47,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:57:47,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 18:57:47,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-11-11 18:57:47,410 INFO L87 Difference]: Start difference. First operand 2538 states and 5034 transitions. Second operand has 30 states, 30 states have (on average 5.766666666666667) internal successors, (173), 30 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:58:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:58:16,178 INFO L93 Difference]: Finished difference Result 3762 states and 7482 transitions. [2020-11-11 18:58:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 443 states. [2020-11-11 18:58:16,178 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.766666666666667) internal successors, (173), 30 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2020-11-11 18:58:16,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:58:16,194 INFO L225 Difference]: With dead ends: 3762 [2020-11-11 18:58:16,194 INFO L226 Difference]: Without dead ends: 3762 [2020-11-11 18:58:16,214 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99125 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=38804, Invalid=168676, Unknown=0, NotChecked=0, Total=207480 [2020-11-11 18:58:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2020-11-11 18:58:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3234. [2020-11-11 18:58:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 1.9876275904732446) internal successors, (6426), 3233 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:58:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 6426 transitions. [2020-11-11 18:58:16,293 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 6426 transitions. Word has length 140 [2020-11-11 18:58:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:58:16,293 INFO L481 AbstractCegarLoop]: Abstraction has 3234 states and 6426 transitions. [2020-11-11 18:58:16,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.766666666666667) internal successors, (173), 30 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:58:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 6426 transitions. [2020-11-11 18:58:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-11-11 18:58:16,302 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:58:16,303 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:58:16,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:58:16,518 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:58:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:58:16,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1603895558, now seen corresponding path program 10 times [2020-11-11 18:58:16,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:58:16,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495898708] [2020-11-11 18:58:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:58:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:58:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 36 proven. 189 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-11-11 18:58:16,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495898708] [2020-11-11 18:58:16,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031888491] [2020-11-11 18:58:16,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:58:16,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 18:58:16,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:58:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 18:58:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:58:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 36 proven. 189 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-11-11 18:58:17,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:58:17,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 18:58:17,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993177335] [2020-11-11 18:58:17,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 18:58:17,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:58:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 18:58:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-11-11 18:58:17,084 INFO L87 Difference]: Start difference. First operand 3234 states and 6426 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:58:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:58:17,628 INFO L93 Difference]: Finished difference Result 3682 states and 7322 transitions. [2020-11-11 18:58:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 18:58:17,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2020-11-11 18:58:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:58:17,647 INFO L225 Difference]: With dead ends: 3682 [2020-11-11 18:58:17,647 INFO L226 Difference]: Without dead ends: 3682 [2020-11-11 18:58:17,648 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 18:58:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2020-11-11 18:58:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3514. [2020-11-11 18:58:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3513 states have (on average 1.9886137204668375) internal successors, (6986), 3513 states have internal predecessors, (6986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:58:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 6986 transitions. [2020-11-11 18:58:17,732 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 6986 transitions. Word has length 153 [2020-11-11 18:58:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:58:17,733 INFO L481 AbstractCegarLoop]: Abstraction has 3514 states and 6986 transitions. [2020-11-11 18:58:17,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:58:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 6986 transitions. [2020-11-11 18:58:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-11-11 18:58:17,743 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:58:17,743 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:58:17,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:58:17,957 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:58:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:58:17,958 INFO L82 PathProgramCache]: Analyzing trace with hash 173401250, now seen corresponding path program 11 times [2020-11-11 18:58:17,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:58:17,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301998549] [2020-11-11 18:58:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:58:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:58:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 36 proven. 235 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-11-11 18:58:18,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301998549] [2020-11-11 18:58:18,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004105628] [2020-11-11 18:58:18,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:58:18,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 18:58:18,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:58:18,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 18:58:18,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:58:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 36 proven. 235 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-11-11 18:58:18,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:58:18,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-11 18:58:18,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351955250] [2020-11-11 18:58:18,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 18:58:18,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:58:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 18:58:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-11-11 18:58:18,630 INFO L87 Difference]: Start difference. First operand 3514 states and 6986 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:58:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:58:19,301 INFO L93 Difference]: Finished difference Result 3962 states and 7882 transitions. [2020-11-11 18:58:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 18:58:19,302 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2020-11-11 18:58:19,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:58:19,311 INFO L225 Difference]: With dead ends: 3962 [2020-11-11 18:58:19,311 INFO L226 Difference]: Without dead ends: 3962 [2020-11-11 18:58:19,312 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 18:58:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2020-11-11 18:58:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 3794. [2020-11-11 18:58:19,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 1.9894542578433958) internal successors, (7546), 3793 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:58:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 7546 transitions. [2020-11-11 18:58:19,412 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 7546 transitions. Word has length 158 [2020-11-11 18:58:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:58:19,413 INFO L481 AbstractCegarLoop]: Abstraction has 3794 states and 7546 transitions. [2020-11-11 18:58:19,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:58:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 7546 transitions. [2020-11-11 18:58:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-11 18:58:19,425 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:58:19,425 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:58:19,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-11 18:58:19,639 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:58:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:58:19,640 INFO L82 PathProgramCache]: Analyzing trace with hash -169097222, now seen corresponding path program 12 times [2020-11-11 18:58:19,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:58:19,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025779966] [2020-11-11 18:58:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:58:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:58:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 36 proven. 286 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-11-11 18:58:20,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025779966] [2020-11-11 18:58:20,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289991197] [2020-11-11 18:58:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:58:20,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-11 18:58:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:58:20,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 18:58:20,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:58:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-11-11 18:58:20,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:58:20,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2020-11-11 18:58:20,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890287172] [2020-11-11 18:58:20,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-11 18:58:20,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:58:20,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-11 18:58:20,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 18:58:20,705 INFO L87 Difference]: Start difference. First operand 3794 states and 7546 transitions. Second operand has 38 states, 38 states have (on average 5.157894736842105) internal successors, (196), 38 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:59:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:59:33,747 INFO L93 Difference]: Finished difference Result 5292 states and 10542 transitions. [2020-11-11 18:59:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 701 states. [2020-11-11 18:59:33,747 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.157894736842105) internal successors, (196), 38 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2020-11-11 18:59:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:59:33,757 INFO L225 Difference]: With dead ends: 5292 [2020-11-11 18:59:33,757 INFO L226 Difference]: Without dead ends: 5292 [2020-11-11 18:59:33,785 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 1547 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 716 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253049 ImplicationChecksByTransitivity, 70.6s TimeCoverageRelationStatistics Valid=92780, Invalid=422026, Unknown=0, NotChecked=0, Total=514806 [2020-11-11 18:59:33,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5292 states. [2020-11-11 18:59:33,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5292 to 4650. [2020-11-11 18:59:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4649 states have (on average 1.9913959991396) internal successors, (9258), 4649 states have internal predecessors, (9258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:59:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 9258 transitions. [2020-11-11 18:59:33,881 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 9258 transitions. Word has length 163 [2020-11-11 18:59:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:59:33,882 INFO L481 AbstractCegarLoop]: Abstraction has 4650 states and 9258 transitions. [2020-11-11 18:59:33,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.157894736842105) internal successors, (196), 38 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:59:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 9258 transitions. [2020-11-11 18:59:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-11-11 18:59:33,895 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:59:33,895 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:59:34,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 18:59:34,110 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:59:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:59:34,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1065111875, now seen corresponding path program 13 times [2020-11-11 18:59:34,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:59:34,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444464924] [2020-11-11 18:59:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:59:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:59:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 43 proven. 342 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-11 18:59:34,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444464924] [2020-11-11 18:59:34,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065281624] [2020-11-11 18:59:34,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:59:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:59:34,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 18:59:34,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:59:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 43 proven. 342 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-11 18:59:35,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:59:35,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-11-11 18:59:35,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293452976] [2020-11-11 18:59:35,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 18:59:35,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:59:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 18:59:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-11-11 18:59:35,046 INFO L87 Difference]: Start difference. First operand 4650 states and 9258 transitions. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:59:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:59:36,117 INFO L93 Difference]: Finished difference Result 5162 states and 10282 transitions. [2020-11-11 18:59:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 18:59:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2020-11-11 18:59:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:59:36,128 INFO L225 Difference]: With dead ends: 5162 [2020-11-11 18:59:36,128 INFO L226 Difference]: Without dead ends: 5162 [2020-11-11 18:59:36,129 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 18:59:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2020-11-11 18:59:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 4970. [2020-11-11 18:59:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4970 states, 4969 states have (on average 1.991950090561481) internal successors, (9898), 4969 states have internal predecessors, (9898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:59:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 9898 transitions. [2020-11-11 18:59:36,243 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 9898 transitions. Word has length 176 [2020-11-11 18:59:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:59:36,243 INFO L481 AbstractCegarLoop]: Abstraction has 4970 states and 9898 transitions. [2020-11-11 18:59:36,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:59:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 9898 transitions. [2020-11-11 18:59:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-11-11 18:59:36,257 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:59:36,257 INFO L494 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:59:36,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 18:59:36,472 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:59:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:59:36,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1743229931, now seen corresponding path program 14 times [2020-11-11 18:59:36,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:59:36,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639760565] [2020-11-11 18:59:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:59:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:59:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 43 proven. 403 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-11 18:59:37,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639760565] [2020-11-11 18:59:37,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885510370] [2020-11-11 18:59:37,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:59:37,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 18:59:37,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:59:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 18:59:37,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:59:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 43 proven. 403 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-11 18:59:37,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:59:37,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 18:59:37,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843937925] [2020-11-11 18:59:37,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 18:59:37,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:59:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 18:59:37,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-11 18:59:37,500 INFO L87 Difference]: Start difference. First operand 4970 states and 9898 transitions. Second operand has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:59:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 18:59:38,640 INFO L93 Difference]: Finished difference Result 5482 states and 10922 transitions. [2020-11-11 18:59:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 18:59:38,641 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2020-11-11 18:59:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 18:59:38,650 INFO L225 Difference]: With dead ends: 5482 [2020-11-11 18:59:38,650 INFO L226 Difference]: Without dead ends: 5482 [2020-11-11 18:59:38,651 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 18:59:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5482 states. [2020-11-11 18:59:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5482 to 5290. [2020-11-11 18:59:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5290 states, 5289 states have (on average 1.9924371336736624) internal successors, (10538), 5289 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:59:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5290 states to 5290 states and 10538 transitions. [2020-11-11 18:59:38,752 INFO L78 Accepts]: Start accepts. Automaton has 5290 states and 10538 transitions. Word has length 181 [2020-11-11 18:59:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 18:59:38,753 INFO L481 AbstractCegarLoop]: Abstraction has 5290 states and 10538 transitions. [2020-11-11 18:59:38,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 18:59:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 5290 states and 10538 transitions. [2020-11-11 18:59:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-11-11 18:59:38,766 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 18:59:38,766 INFO L494 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 18:59:38,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 18:59:38,980 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 18:59:38,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 18:59:38,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1998341565, now seen corresponding path program 15 times [2020-11-11 18:59:38,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 18:59:38,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272194299] [2020-11-11 18:59:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 18:59:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 18:59:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 43 proven. 469 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-11 18:59:39,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272194299] [2020-11-11 18:59:39,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90943285] [2020-11-11 18:59:39,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 18:59:39,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 18:59:39,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 18:59:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 18:59:39,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 18:59:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2020-11-11 18:59:40,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 18:59:40,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17] total 46 [2020-11-11 18:59:40,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809311861] [2020-11-11 18:59:40,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-11 18:59:40,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 18:59:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-11 18:59:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 18:59:40,840 INFO L87 Difference]: Start difference. First operand 5290 states and 10538 transitions. Second operand has 46 states, 46 states have (on average 4.760869565217392) internal successors, (219), 46 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 19:02:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 19:02:49,278 INFO L93 Difference]: Finished difference Result 7062 states and 14082 transitions. [2020-11-11 19:02:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1013 states. [2020-11-11 19:02:49,279 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.760869565217392) internal successors, (219), 46 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2020-11-11 19:02:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 19:02:49,287 INFO L225 Difference]: With dead ends: 7062 [2020-11-11 19:02:49,287 INFO L226 Difference]: Without dead ends: 7062 [2020-11-11 19:02:49,340 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 2192 GetRequests, 1160 SyntacticMatches, 0 SemanticMatches, 1032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534389 ImplicationChecksByTransitivity, 184.4s TimeCoverageRelationStatistics Valid=187686, Invalid=880436, Unknown=0, NotChecked=0, Total=1068122 [2020-11-11 19:02:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7062 states. [2020-11-11 19:02:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7062 to 6306. [2020-11-11 19:02:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6306 states, 6305 states have (on average 1.9936558287073751) internal successors, (12570), 6305 states have internal predecessors, (12570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 19:02:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 12570 transitions. [2020-11-11 19:02:49,451 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 12570 transitions. Word has length 186 [2020-11-11 19:02:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 19:02:49,452 INFO L481 AbstractCegarLoop]: Abstraction has 6306 states and 12570 transitions. [2020-11-11 19:02:49,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 4.760869565217392) internal successors, (219), 46 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 19:02:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 12570 transitions. [2020-11-11 19:02:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-11 19:02:49,466 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 19:02:49,467 INFO L494 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 19:02:49,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 19:02:49,681 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 19:02:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 19:02:49,682 INFO L82 PathProgramCache]: Analyzing trace with hash -423066320, now seen corresponding path program 16 times [2020-11-11 19:02:49,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 19:02:49,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928189314] [2020-11-11 19:02:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 19:02:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 19:02:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 50 proven. 540 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-11-11 19:02:51,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928189314] [2020-11-11 19:02:51,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663517548] [2020-11-11 19:02:51,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 19:02:51,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 19:02:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 19:02:51,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 19:02:51,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 19:02:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 50 proven. 540 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-11-11 19:02:51,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 19:02:51,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-11-11 19:02:51,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63576749] [2020-11-11 19:02:51,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-11 19:02:51,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 19:02:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-11 19:02:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 19:02:51,315 INFO L87 Difference]: Start difference. First operand 6306 states and 12570 transitions. Second operand has 35 states, 35 states have (on average 4.428571428571429) internal successors, (155), 35 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 19:02:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 19:02:53,354 INFO L93 Difference]: Finished difference Result 6882 states and 13722 transitions. [2020-11-11 19:02:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 19:02:53,356 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.428571428571429) internal successors, (155), 35 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2020-11-11 19:02:53,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 19:02:53,363 INFO L225 Difference]: With dead ends: 6882 [2020-11-11 19:02:53,363 INFO L226 Difference]: Without dead ends: 6882 [2020-11-11 19:02:53,364 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2020-11-11 19:02:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6882 states. [2020-11-11 19:02:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6882 to 6666. [2020-11-11 19:02:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6666 states, 6665 states have (on average 1.9939984996249063) internal successors, (13290), 6665 states have internal predecessors, (13290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 19:02:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 13290 transitions. [2020-11-11 19:02:53,491 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 13290 transitions. Word has length 199 [2020-11-11 19:02:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 19:02:53,491 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 13290 transitions. [2020-11-11 19:02:53,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.428571428571429) internal successors, (155), 35 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 19:02:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 13290 transitions. [2020-11-11 19:02:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-11-11 19:02:53,510 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 19:02:53,511 INFO L494 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 19:02:53,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 19:02:53,725 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 19:02:53,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 19:02:53,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1883749160, now seen corresponding path program 17 times [2020-11-11 19:02:53,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 19:02:53,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463262563] [2020-11-11 19:02:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 19:02:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 19:02:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 50 proven. 616 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-11-11 19:02:55,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463262563] [2020-11-11 19:02:55,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250115226] [2020-11-11 19:02:55,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 19:02:55,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-11-11 19:02:55,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 19:02:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-11 19:02:55,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 19:02:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 50 proven. 616 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-11-11 19:02:55,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 19:02:55,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-11-11 19:02:55,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430690831] [2020-11-11 19:02:55,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-11 19:02:55,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 19:02:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-11 19:02:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 19:02:55,324 INFO L87 Difference]: Start difference. First operand 6666 states and 13290 transitions. Second operand has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 37 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 19:02:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 19:02:57,729 INFO L93 Difference]: Finished difference Result 7242 states and 14442 transitions. [2020-11-11 19:02:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 19:02:57,731 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 37 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2020-11-11 19:02:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 19:02:57,737 INFO L225 Difference]: With dead ends: 7242 [2020-11-11 19:02:57,737 INFO L226 Difference]: Without dead ends: 7242 [2020-11-11 19:02:57,737 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2020-11-11 19:02:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7242 states. [2020-11-11 19:02:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7242 to 7026. [2020-11-11 19:02:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 1.9943060498220642) internal successors, (14010), 7025 states have internal predecessors, (14010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 19:02:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 14010 transitions. [2020-11-11 19:02:57,859 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 14010 transitions. Word has length 204 [2020-11-11 19:02:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 19:02:57,859 INFO L481 AbstractCegarLoop]: Abstraction has 7026 states and 14010 transitions. [2020-11-11 19:02:57,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 37 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 19:02:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 14010 transitions. [2020-11-11 19:02:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-11-11 19:02:57,874 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 19:02:57,875 INFO L494 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 19:02:58,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 19:02:58,089 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 19:02:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 19:02:58,090 INFO L82 PathProgramCache]: Analyzing trace with hash 813043248, now seen corresponding path program 18 times [2020-11-11 19:02:58,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 19:02:58,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401165055] [2020-11-11 19:02:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 19:02:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 19:02:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 50 proven. 697 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-11-11 19:02:59,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401165055] [2020-11-11 19:02:59,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477126478] [2020-11-11 19:02:59,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 19:02:59,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-11-11 19:02:59,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 19:02:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 19:02:59,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 19:03:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2020-11-11 19:03:01,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 19:03:01,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 19] total 54 [2020-11-11 19:03:01,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454558859] [2020-11-11 19:03:01,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-11 19:03:01,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 19:03:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-11 19:03:01,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2404, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 19:03:01,143 INFO L87 Difference]: Start difference. First operand 7026 states and 14010 transitions. Second operand has 54 states, 54 states have (on average 4.481481481481482) internal successors, (242), 54 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2020-11-11 19:10:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1265 states. [2020-11-11 19:10:43,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-11 19:10:43,715 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-11 19:10:43,724 WARN L250 ceAbstractionStarter]: Timeout [2020-11-11 19:10:43,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 07:10:43 BasicIcfg [2020-11-11 19:10:43,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 19:10:43,729 INFO L168 Benchmark]: Toolchain (without parser) took 799114.25 ms. Allocated memory was 302.0 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 276.3 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 620.0 MB. Max. memory is 16.0 GB. [2020-11-11 19:10:43,731 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory is still 272.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 19:10:43,735 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1089.78 ms. Allocated memory is still 302.0 MB. Free memory was 275.6 MB in the beginning and 230.6 MB in the end (delta: 44.9 MB). Peak memory consumption was 45.2 MB. Max. memory is 16.0 GB. [2020-11-11 19:10:43,741 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.61 ms. Allocated memory is still 302.0 MB. Free memory was 230.6 MB in the beginning and 228.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 19:10:43,742 INFO L168 Benchmark]: Boogie Preprocessor took 33.36 ms. Allocated memory is still 302.0 MB. Free memory was 228.6 MB in the beginning and 226.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 19:10:43,742 INFO L168 Benchmark]: RCFGBuilder took 604.45 ms. Allocated memory is still 302.0 MB. Free memory was 226.5 MB in the beginning and 200.2 MB in the end (delta: 26.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. [2020-11-11 19:10:43,743 INFO L168 Benchmark]: TraceAbstraction took 797315.85 ms. Allocated memory was 302.0 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 199.2 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 543.3 MB. Max. memory is 16.0 GB. [2020-11-11 19:10:43,745 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory is still 272.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 1089.78 ms. Allocated memory is still 302.0 MB. Free memory was 275.6 MB in the beginning and 230.6 MB in the end (delta: 44.9 MB). Peak memory consumption was 45.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 58.61 ms. Allocated memory is still 302.0 MB. Free memory was 230.6 MB in the beginning and 228.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 33.36 ms. Allocated memory is still 302.0 MB. Free memory was 228.6 MB in the beginning and 226.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 604.45 ms. Allocated memory is still 302.0 MB. Free memory was 226.5 MB in the beginning and 200.2 MB in the end (delta: 26.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 797315.85 ms. Allocated memory was 302.0 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 199.2 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 543.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (7026states) and FLOYD_HOARE automaton (currently 1265 states, 54 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 1290 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 87 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 797.1s, OverallIterations: 21, TraceHistogramMax: 17, AutomataDifference: 774.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2162 SDtfs, 46400 SDslu, 26334 SDs, 0 SdLazy, 4425 SolverSat, 4927 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10664 GetRequests, 6386 SyntacticMatches, 0 SemanticMatches, 4277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753032 ImplicationChecksByTransitivity, 759.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7026occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 4818 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 5434 NumberOfCodeBlocks, 4981 NumberOfCodeBlocksAsserted, 126 NumberOfCheckSat, 5395 ConstructedInterpolants, 0 QuantifiedInterpolants, 1475595 SizeOfPredicates, 280 NumberOfNonLiveVariables, 4699 ConjunctsInSsa, 298 ConjunctsInUnsatCore, 39 InterpolantComputations, 3 PerfectInterpolantSequences, 5056/12577 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown