/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 18:52:27,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 18:52:27,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 18:52:27,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 18:52:27,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 18:52:27,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 18:52:27,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 18:52:27,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 18:52:27,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 18:52:27,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 18:52:27,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 18:52:27,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 18:52:27,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 18:52:27,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 18:52:27,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 18:52:27,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 18:52:27,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 18:52:27,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 18:52:27,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 18:52:27,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 18:52:27,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 18:52:27,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 18:52:27,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 18:52:27,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 18:52:27,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 18:52:27,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 18:52:27,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 18:52:27,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 18:52:27,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 18:52:27,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 18:52:27,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 18:52:27,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 18:52:27,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 18:52:27,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 18:52:27,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 18:52:27,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 18:52:27,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 18:52:27,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 18:52:27,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 18:52:27,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 18:52:27,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 18:52:27,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 18:52:27,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 18:52:27,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 18:52:27,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 18:52:27,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 18:52:27,731 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 18:52:27,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 18:52:27,731 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 18:52:27,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 18:52:27,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 18:52:27,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 18:52:27,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 18:52:27,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 18:52:27,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 18:52:27,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 18:52:27,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 18:52:27,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 18:52:27,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 18:52:27,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 18:52:27,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 18:52:27,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 18:52:27,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 18:52:27,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:52:27,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 18:52:27,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 18:52:27,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 18:52:27,736 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 18:52:27,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 18:52:27,736 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 18:52:27,737 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 18:52:27,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 18:52:28,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 18:52:28,081 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 18:52:28,086 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 18:52:28,088 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 18:52:28,090 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 18:52:28,091 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-09 18:52:28,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd3c58b6/471d6ed38ad446d4a51e3a289ab251a2/FLAGe879a5810 [2020-10-09 18:52:28,740 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 18:52:28,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-09 18:52:28,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd3c58b6/471d6ed38ad446d4a51e3a289ab251a2/FLAGe879a5810 [2020-10-09 18:52:29,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd3c58b6/471d6ed38ad446d4a51e3a289ab251a2 [2020-10-09 18:52:29,022 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 18:52:29,024 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 18:52:29,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 18:52:29,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 18:52:29,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 18:52:29,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c33baf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:29, skipping insertion in model container [2020-10-09 18:52:29,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:52:29" (1/1) ... [2020-10-09 18:52:29,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 18:52:29,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 18:52:29,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:52:29,737 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 18:52:29,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:52:30,010 INFO L208 MainTranslator]: Completed translation [2020-10-09 18:52:30,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30 WrapperNode [2020-10-09 18:52:30,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 18:52:30,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 18:52:30,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 18:52:30,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 18:52:30,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... [2020-10-09 18:52:30,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... [2020-10-09 18:52:30,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 18:52:30,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 18:52:30,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 18:52:30,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 18:52:30,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... [2020-10-09 18:52:30,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... [2020-10-09 18:52:30,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... [2020-10-09 18:52:30,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... [2020-10-09 18:52:30,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... [2020-10-09 18:52:30,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... [2020-10-09 18:52:30,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... [2020-10-09 18:52:30,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 18:52:30,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 18:52:30,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 18:52:30,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 18:52:30,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:52:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 18:52:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 18:52:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 18:52:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-10-09 18:52:30,260 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-10-09 18:52:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 18:52:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 18:52:30,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 18:52:30,263 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 18:52:30,701 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 18:52:30,701 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 18:52:30,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:52:30 BoogieIcfgContainer [2020-10-09 18:52:30,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 18:52:30,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 18:52:30,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 18:52:30,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 18:52:30,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 06:52:29" (1/3) ... [2020-10-09 18:52:30,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f30f911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:52:30, skipping insertion in model container [2020-10-09 18:52:30,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:52:30" (2/3) ... [2020-10-09 18:52:30,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f30f911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:52:30, skipping insertion in model container [2020-10-09 18:52:30,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:52:30" (3/3) ... [2020-10-09 18:52:30,713 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-10-09 18:52:30,724 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 18:52:30,731 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 18:52:30,732 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 18:52:30,757 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,757 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,758 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,758 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,758 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,759 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,759 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,759 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,759 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,760 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,760 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,760 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,760 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,761 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,761 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,761 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,762 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,762 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,762 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,762 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,762 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,766 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,767 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,767 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,767 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,767 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,768 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,768 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,768 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:52:30,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 18:52:30,810 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 18:52:30,810 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 18:52:30,810 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 18:52:30,810 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 18:52:30,811 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 18:52:30,811 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 18:52:30,811 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 18:52:30,811 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 18:52:30,826 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-10-09 18:52:30,880 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-10-09 18:52:30,880 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 18:52:30,886 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-09 18:52:30,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 85 transitions, 178 flow [2020-10-09 18:52:30,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 75 transitions, 156 flow [2020-10-09 18:52:30,938 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2020-10-09 18:52:30,939 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 18:52:30,939 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:30,940 INFO L255 CegarLoopForPetriNet]: 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] [2020-10-09 18:52:30,941 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2068775339, now seen corresponding path program 1 times [2020-10-09 18:52:30,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:30,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419439782] [2020-10-09 18:52:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 18:52:31,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:31,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:31,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419439782] [2020-10-09 18:52:31,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:52:31,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 18:52:31,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277477939] [2020-10-09 18:52:31,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 18:52:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 18:52:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 18:52:31,172 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 85 [2020-10-09 18:52:31,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 156 flow. Second operand 2 states. [2020-10-09 18:52:31,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:31,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 85 [2020-10-09 18:52:31,176 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:31,227 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2020-10-09 18:52:31,228 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 18:52:31,228 INFO L80 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 69 events. 2/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/70 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2020-10-09 18:52:31,230 INFO L132 encePairwiseOnDemand]: 81/85 looper letters, 0 selfloop transitions, 0 changer transitions 0/69 dead transitions. [2020-10-09 18:52:31,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 144 flow [2020-10-09 18:52:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 18:52:31,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 18:52:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2020-10-09 18:52:31,246 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9411764705882353 [2020-10-09 18:52:31,247 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2020-10-09 18:52:31,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2020-10-09 18:52:31,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:31,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2020-10-09 18:52:31,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 18:52:31,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 18:52:31,269 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 18:52:31,272 INFO L185 Difference]: Start difference. First operand has 73 places, 75 transitions, 156 flow. Second operand 2 states and 160 transitions. [2020-10-09 18:52:31,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 144 flow [2020-10-09 18:52:31,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 18:52:31,281 INFO L241 Difference]: Finished difference. Result has 70 places, 69 transitions, 140 flow [2020-10-09 18:52:31,284 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=140, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2020-10-09 18:52:31,285 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2020-10-09 18:52:31,286 INFO L481 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 140 flow [2020-10-09 18:52:31,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 18:52:31,286 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:31,286 INFO L255 CegarLoopForPetriNet]: 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] [2020-10-09 18:52:31,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 18:52:31,499 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash -8377837, now seen corresponding path program 1 times [2020-10-09 18:52:31,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:31,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427591468] [2020-10-09 18:52:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:31,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 18:52:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:31,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:31,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427591468] [2020-10-09 18:52:31,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:52:31,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 18:52:31,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081314868] [2020-10-09 18:52:31,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 18:52:31,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:31,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 18:52:31,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 18:52:31,771 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 85 [2020-10-09 18:52:31,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 140 flow. Second operand 4 states. [2020-10-09 18:52:31,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:31,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 85 [2020-10-09 18:52:31,772 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:31,800 INFO L129 PetriNetUnfolder]: 2/76 cut-off events. [2020-10-09 18:52:31,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:52:31,801 INFO L80 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 76 events. 2/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 85. Up to 6 conditions per place. [2020-10-09 18:52:31,802 INFO L132 encePairwiseOnDemand]: 81/85 looper letters, 4 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2020-10-09 18:52:31,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 160 flow [2020-10-09 18:52:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 18:52:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 18:52:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 297 transitions. [2020-10-09 18:52:31,806 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8735294117647059 [2020-10-09 18:52:31,806 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 297 transitions. [2020-10-09 18:52:31,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 297 transitions. [2020-10-09 18:52:31,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:31,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 297 transitions. [2020-10-09 18:52:31,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 18:52:31,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 18:52:31,812 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 18:52:31,812 INFO L185 Difference]: Start difference. First operand has 70 places, 69 transitions, 140 flow. Second operand 4 states and 297 transitions. [2020-10-09 18:52:31,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 160 flow [2020-10-09 18:52:31,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 18:52:31,820 INFO L241 Difference]: Finished difference. Result has 75 places, 71 transitions, 162 flow [2020-10-09 18:52:31,820 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2020-10-09 18:52:31,821 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2020-10-09 18:52:31,821 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 162 flow [2020-10-09 18:52:31,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 18:52:31,822 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:31,822 INFO L255 CegarLoopForPetriNet]: 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] [2020-10-09 18:52:32,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 18:52:32,036 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1055662168, now seen corresponding path program 1 times [2020-10-09 18:52:32,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:32,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478260605] [2020-10-09 18:52:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:32,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:32,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:32,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478260605] [2020-10-09 18:52:32,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674843574] [2020-10-09 18:52:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 18:52:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:32,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:32,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2020-10-09 18:52:32,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2020-10-09 18:52:32,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656559507] [2020-10-09 18:52:32,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 18:52:32,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 18:52:32,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-09 18:52:32,450 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 85 [2020-10-09 18:52:32,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 162 flow. Second operand 4 states. [2020-10-09 18:52:32,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:32,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 85 [2020-10-09 18:52:32,451 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:32,479 INFO L129 PetriNetUnfolder]: 2/80 cut-off events. [2020-10-09 18:52:32,479 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-09 18:52:32,480 INFO L80 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 80 events. 2/80 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2020-10-09 18:52:32,481 INFO L132 encePairwiseOnDemand]: 81/85 looper letters, 4 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2020-10-09 18:52:32,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 182 flow [2020-10-09 18:52:32,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 18:52:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 18:52:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 297 transitions. [2020-10-09 18:52:32,484 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8735294117647059 [2020-10-09 18:52:32,485 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 297 transitions. [2020-10-09 18:52:32,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 297 transitions. [2020-10-09 18:52:32,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:32,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 297 transitions. [2020-10-09 18:52:32,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 18:52:32,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 18:52:32,489 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 18:52:32,489 INFO L185 Difference]: Start difference. First operand has 75 places, 71 transitions, 162 flow. Second operand 4 states and 297 transitions. [2020-10-09 18:52:32,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 182 flow [2020-10-09 18:52:32,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 18:52:32,514 INFO L241 Difference]: Finished difference. Result has 80 places, 73 transitions, 184 flow [2020-10-09 18:52:32,514 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2020-10-09 18:52:32,514 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2020-10-09 18:52:32,515 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 184 flow [2020-10-09 18:52:32,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 18:52:32,515 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:32,515 INFO L255 CegarLoopForPetriNet]: 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] [2020-10-09 18:52:32,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:32,917 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:32,917 INFO L82 PathProgramCache]: Analyzing trace with hash 96648646, now seen corresponding path program 1 times [2020-10-09 18:52:32,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:32,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327640576] [2020-10-09 18:52:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:33,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:33,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327640576] [2020-10-09 18:52:33,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [9024034] [2020-10-09 18:52:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:33,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:33,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:33,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817410882] [2020-10-09 18:52:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-09 18:52:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:52:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:33,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:33,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 18:52:33,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:52:33,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-10-09 18:52:33,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880551169] [2020-10-09 18:52:33,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:52:33,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:33,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:52:33,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:52:33,415 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 85 [2020-10-09 18:52:33,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 184 flow. Second operand 8 states. [2020-10-09 18:52:33,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:33,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 85 [2020-10-09 18:52:33,416 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:33,490 INFO L129 PetriNetUnfolder]: 2/90 cut-off events. [2020-10-09 18:52:33,490 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2020-10-09 18:52:33,491 INFO L80 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 90 events. 2/90 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 2/91 useless extension candidates. Maximal degree in co-relation 131. Up to 6 conditions per place. [2020-10-09 18:52:33,492 INFO L132 encePairwiseOnDemand]: 79/85 looper letters, 8 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2020-10-09 18:52:33,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 80 transitions, 241 flow [2020-10-09 18:52:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 18:52:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 18:52:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 649 transitions. [2020-10-09 18:52:33,495 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8483660130718954 [2020-10-09 18:52:33,495 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 649 transitions. [2020-10-09 18:52:33,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 649 transitions. [2020-10-09 18:52:33,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:33,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 649 transitions. [2020-10-09 18:52:33,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 18:52:33,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 18:52:33,500 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 18:52:33,500 INFO L185 Difference]: Start difference. First operand has 80 places, 73 transitions, 184 flow. Second operand 9 states and 649 transitions. [2020-10-09 18:52:33,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 80 transitions, 241 flow [2020-10-09 18:52:33,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 80 transitions, 241 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 18:52:33,504 INFO L241 Difference]: Finished difference. Result has 91 places, 79 transitions, 238 flow [2020-10-09 18:52:33,505 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=238, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2020-10-09 18:52:33,505 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 18 predicate places. [2020-10-09 18:52:33,505 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 238 flow [2020-10-09 18:52:33,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:52:33,506 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:33,506 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2020-10-09 18:52:34,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:52:34,110 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:34,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1368585852, now seen corresponding path program 2 times [2020-10-09 18:52:34,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:34,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032453667] [2020-10-09 18:52:34,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:34,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 18:52:34,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:34,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032453667] [2020-10-09 18:52:34,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1320507906] [2020-10-09 18:52:34,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:34,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 18:52:34,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:34,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:34,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814472737] [2020-10-09 18:52:34,552 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:52:34,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 18:52:34,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 18:52:34,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-09 18:52:34,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:52:34,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-10-09 18:52:34,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889534937] [2020-10-09 18:52:34,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:52:34,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:34,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:52:34,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:52:34,704 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 85 [2020-10-09 18:52:34,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 238 flow. Second operand 8 states. [2020-10-09 18:52:34,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:34,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 85 [2020-10-09 18:52:34,706 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:52:34,795 INFO L129 PetriNetUnfolder]: 2/97 cut-off events. [2020-10-09 18:52:34,795 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2020-10-09 18:52:34,796 INFO L80 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 97 events. 2/97 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 2/98 useless extension candidates. Maximal degree in co-relation 162. Up to 6 conditions per place. [2020-10-09 18:52:34,797 INFO L132 encePairwiseOnDemand]: 79/85 looper letters, 8 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2020-10-09 18:52:34,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 86 transitions, 295 flow [2020-10-09 18:52:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 18:52:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 18:52:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 649 transitions. [2020-10-09 18:52:34,803 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8483660130718954 [2020-10-09 18:52:34,804 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 649 transitions. [2020-10-09 18:52:34,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 649 transitions. [2020-10-09 18:52:34,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:52:34,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 649 transitions. [2020-10-09 18:52:34,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 18:52:34,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 18:52:34,812 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 18:52:34,813 INFO L185 Difference]: Start difference. First operand has 91 places, 79 transitions, 238 flow. Second operand 9 states and 649 transitions. [2020-10-09 18:52:34,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 86 transitions, 295 flow [2020-10-09 18:52:34,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 86 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 18:52:34,817 INFO L241 Difference]: Finished difference. Result has 101 places, 85 transitions, 290 flow [2020-10-09 18:52:34,818 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=290, PETRI_PLACES=101, PETRI_TRANSITIONS=85} [2020-10-09 18:52:34,818 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 28 predicate places. [2020-10-09 18:52:34,818 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 85 transitions, 290 flow [2020-10-09 18:52:34,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:52:34,818 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:52:34,819 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-09 18:52:35,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:52:35,432 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:52:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:52:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1375194684, now seen corresponding path program 3 times [2020-10-09 18:52:35,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:52:35,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710830884] [2020-10-09 18:52:35,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-10-09 18:52:35,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 18:52:35,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:52:35,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-09 18:52:35,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-09 18:52:35,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710830884] [2020-10-09 18:52:35,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609669716] [2020-10-09 18:52:35,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:52:35,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 18:52:35,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:35,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 18:52:35,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:36,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:52:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:36,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 18:52:36,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278465004] [2020-10-09 18:52:36,545 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:52:36,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 18:52:36,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:52:36,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:52:36,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:52:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-09 18:52:36,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:52:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-09 18:52:36,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:52:36,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 15, 15, 9, 9] total 42 [2020-10-09 18:52:36,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272667250] [2020-10-09 18:52:36,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-09 18:52:36,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:52:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-09 18:52:36,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2020-10-09 18:52:38,713 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 85 [2020-10-09 18:52:38,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 85 transitions, 290 flow. Second operand 42 states. [2020-10-09 18:52:38,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:52:38,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 85 [2020-10-09 18:52:38,716 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:53:24,348 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-10-09 18:53:31,007 INFO L129 PetriNetUnfolder]: 2163/13754 cut-off events. [2020-10-09 18:53:31,008 INFO L130 PetriNetUnfolder]: For 14264/14264 co-relation queries the response was YES. [2020-10-09 18:53:31,076 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39025 conditions, 13754 events. 2163/13754 cut-off events. For 14264/14264 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 172053 event pairs, 0 based on Foata normal form. 141/13856 useless extension candidates. Maximal degree in co-relation 39012. Up to 2970 conditions per place. [2020-10-09 18:53:31,146 INFO L132 encePairwiseOnDemand]: 71/85 looper letters, 497 selfloop transitions, 2159 changer transitions 12/2727 dead transitions. [2020-10-09 18:53:31,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 945 places, 2727 transitions, 14684 flow [2020-10-09 18:53:31,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 845 states. [2020-10-09 18:53:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 845 states. [2020-10-09 18:53:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 52624 transitions. [2020-10-09 18:53:31,235 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7326696832579186 [2020-10-09 18:53:31,235 INFO L72 ComplementDD]: Start complementDD. Operand 845 states and 52624 transitions. [2020-10-09 18:53:31,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 845 states and 52624 transitions. [2020-10-09 18:53:31,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:53:31,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 845 states and 52624 transitions. [2020-10-09 18:53:31,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 846 states. [2020-10-09 18:53:31,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 846 states. [2020-10-09 18:53:31,470 INFO L81 ComplementDD]: Finished complementDD. Result 846 states. [2020-10-09 18:53:31,470 INFO L185 Difference]: Start difference. First operand has 101 places, 85 transitions, 290 flow. Second operand 845 states and 52624 transitions. [2020-10-09 18:53:31,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 945 places, 2727 transitions, 14684 flow [2020-10-09 18:53:31,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 944 places, 2727 transitions, 14682 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 18:53:31,746 INFO L241 Difference]: Finished difference. Result has 1055 places, 2451 transitions, 13235 flow [2020-10-09 18:53:31,748 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=845, PETRI_FLOW=13235, PETRI_PLACES=1055, PETRI_TRANSITIONS=2451} [2020-10-09 18:53:31,748 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 982 predicate places. [2020-10-09 18:53:31,748 INFO L481 AbstractCegarLoop]: Abstraction has has 1055 places, 2451 transitions, 13235 flow [2020-10-09 18:53:31,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-09 18:53:31,748 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:53:31,749 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-10-09 18:53:32,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk,12 mathsat -unsat_core_generation=3 [2020-10-09 18:53:32,350 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:53:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:53:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1728791730, now seen corresponding path program 4 times [2020-10-09 18:53:32,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:53:32,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720252845] [2020-10-09 18:53:32,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-10-09 18:53:32,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 18:53:32,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:53:32,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 18:53:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:53:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 9 proven. 182 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 18:53:32,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:53:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 9 proven. 182 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 18:53:32,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720252845] [2020-10-09 18:53:32,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1473563160] [2020-10-09 18:53:32,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:53:33,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 18:53:33,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:53:33,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:53:33,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:53:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 43 proven. 74 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-09 18:53:33,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:53:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 43 proven. 74 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-09 18:53:33,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519825637] [2020-10-09 18:53:33,446 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 [2020-10-09 18:53:33,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 18:53:33,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:53:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 18:53:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:53:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 9 proven. 182 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 18:53:33,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:53:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 9 proven. 182 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 18:53:33,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:53:33,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 9, 9, 17, 17] total 46 [2020-10-09 18:53:33,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748025975] [2020-10-09 18:53:33,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-09 18:53:33,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:53:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-09 18:53:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2020-10-09 18:53:34,051 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 85 [2020-10-09 18:53:34,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1055 places, 2451 transitions, 13235 flow. Second operand 46 states. [2020-10-09 18:53:34,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:53:34,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 85 [2020-10-09 18:53:34,054 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:54:59,735 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-10-09 18:55:41,554 INFO L129 PetriNetUnfolder]: 19804/50497 cut-off events. [2020-10-09 18:55:41,554 INFO L130 PetriNetUnfolder]: For 2542920/2543284 co-relation queries the response was YES. [2020-10-09 18:55:43,256 INFO L80 FinitePrefix]: Finished finitePrefix Result has 211472 conditions, 50497 events. 19804/50497 cut-off events. For 2542920/2543284 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 526146 event pairs, 511 based on Foata normal form. 3444/53781 useless extension candidates. Maximal degree in co-relation 211348. Up to 8950 conditions per place. [2020-10-09 18:55:43,539 INFO L132 encePairwiseOnDemand]: 73/85 looper letters, 905 selfloop transitions, 6955 changer transitions 0/9605 dead transitions. [2020-10-09 18:55:43,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1927 places, 9605 transitions, 89777 flow [2020-10-09 18:55:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 881 states. [2020-10-09 18:55:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 881 states. [2020-10-09 18:55:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 57605 transitions. [2020-10-09 18:55:43,589 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7692461774721239 [2020-10-09 18:55:43,589 INFO L72 ComplementDD]: Start complementDD. Operand 881 states and 57605 transitions. [2020-10-09 18:55:43,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 881 states and 57605 transitions. [2020-10-09 18:55:43,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:55:43,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 881 states and 57605 transitions. [2020-10-09 18:55:43,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 882 states. [2020-10-09 18:55:43,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 882 states. [2020-10-09 18:55:43,721 INFO L81 ComplementDD]: Finished complementDD. Result 882 states. [2020-10-09 18:55:43,722 INFO L185 Difference]: Start difference. First operand has 1055 places, 2451 transitions, 13235 flow. Second operand 881 states and 57605 transitions. [2020-10-09 18:55:43,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1927 places, 9605 transitions, 89777 flow [2020-10-09 18:55:52,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1913 places, 9605 transitions, 82528 flow, removed 1614 selfloop flow, removed 14 redundant places. [2020-10-09 18:55:52,439 INFO L241 Difference]: Finished difference. Result has 2268 places, 8846 transitions, 76268 flow [2020-10-09 18:55:52,443 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=12256, PETRI_DIFFERENCE_MINUEND_PLACES=1033, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=688, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=881, PETRI_FLOW=76268, PETRI_PLACES=2268, PETRI_TRANSITIONS=8846} [2020-10-09 18:55:52,443 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 2195 predicate places. [2020-10-09 18:55:52,443 INFO L481 AbstractCegarLoop]: Abstraction has has 2268 places, 8846 transitions, 76268 flow [2020-10-09 18:55:52,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-09 18:55:52,444 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:55:52,444 INFO L255 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 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] [2020-10-09 18:55:53,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3,16 cvc4 --incremental --print-success --lang smt --rewrite-divk,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:55:53,055 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:55:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:55:53,056 INFO L82 PathProgramCache]: Analyzing trace with hash -510855664, now seen corresponding path program 5 times [2020-10-09 18:55:53,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:55:53,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043277602] [2020-10-09 18:55:53,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-10-09 18:55:53,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-09 18:55:53,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:55:53,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 18:55:53,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:55:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 29 proven. 112 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:55:53,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:55:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 29 proven. 112 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:55:53,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043277602] [2020-10-09 18:55:53,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1324766109] [2020-10-09 18:55:53,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 18:55:54,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-09 18:55:54,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:55:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 18:55:54,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:55:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 29 proven. 112 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:55:54,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:55:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 29 proven. 112 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:55:54,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899885966] [2020-10-09 18:55:54,183 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 18:55:54,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-09 18:55:54,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:55:54,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 18:55:54,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:55:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 29 proven. 112 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:55:54,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:55:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 29 proven. 112 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-09 18:55:54,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 18:55:54,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2020-10-09 18:55:54,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444654398] [2020-10-09 18:55:54,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-09 18:55:54,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:55:54,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-09 18:55:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-10-09 18:55:54,513 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 85 [2020-10-09 18:55:54,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2268 places, 8846 transitions, 76268 flow. Second operand 32 states. [2020-10-09 18:55:54,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:55:54,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 85 [2020-10-09 18:55:54,516 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown