/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 03:34:00,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 03:34:00,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 03:34:00,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 03:34:00,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 03:34:00,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 03:34:00,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 03:34:00,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 03:34:00,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 03:34:00,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 03:34:00,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 03:34:00,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 03:34:00,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 03:34:00,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 03:34:00,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 03:34:00,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 03:34:00,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 03:34:00,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 03:34:00,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 03:34:00,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 03:34:00,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 03:34:00,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 03:34:00,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 03:34:00,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 03:34:00,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 03:34:00,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 03:34:00,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 03:34:00,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 03:34:00,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 03:34:00,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 03:34:00,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 03:34:00,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 03:34:00,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 03:34:00,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 03:34:00,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 03:34:00,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 03:34:00,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 03:34:00,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 03:34:00,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 03:34:00,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 03:34:00,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 03:34:00,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 03:34:00,888 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 03:34:00,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 03:34:00,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 03:34:00,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 03:34:00,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 03:34:00,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 03:34:00,890 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 03:34:00,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 03:34:00,891 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 03:34:00,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 03:34:00,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 03:34:00,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 03:34:00,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 03:34:00,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 03:34:00,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 03:34:00,892 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 03:34:00,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 03:34:00,892 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 03:34:00,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 03:34:00,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 03:34:00,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 03:34:00,893 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 03:34:00,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 03:34:00,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:34:00,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 03:34:00,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 03:34:00,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 03:34:00,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 03:34:00,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 03:34:00,894 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 03:34:00,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 03:34:00,894 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 03:34:01,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 03:34:01,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 03:34:01,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 03:34:01,121 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 03:34:01,121 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 03:34:01,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-01-28 03:34:02,174 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 03:34:02,369 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 03:34:02,369 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-01-28 03:34:02,376 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1108433/6278718bfc0b4783b2df062ff5efecf0/FLAGd7d0a1e07 [2023-01-28 03:34:02,390 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1108433/6278718bfc0b4783b2df062ff5efecf0 [2023-01-28 03:34:02,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 03:34:02,394 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 03:34:02,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 03:34:02,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 03:34:02,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 03:34:02,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df5aa39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02, skipping insertion in model container [2023-01-28 03:34:02,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 03:34:02,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 03:34:02,635 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-01-28 03:34:02,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:34:02,665 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 03:34:02,686 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-01-28 03:34:02,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:34:02,696 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:34:02,696 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:34:02,702 INFO L208 MainTranslator]: Completed translation [2023-01-28 03:34:02,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02 WrapperNode [2023-01-28 03:34:02,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 03:34:02,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 03:34:02,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 03:34:02,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 03:34:02,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,744 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 311 [2023-01-28 03:34:02,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 03:34:02,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 03:34:02,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 03:34:02,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 03:34:02,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 03:34:02,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 03:34:02,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 03:34:02,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 03:34:02,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (1/1) ... [2023-01-28 03:34:02,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:34:02,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:34:02,803 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 03:34:02,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 03:34:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 03:34:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 03:34:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 03:34:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 03:34:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 03:34:02,842 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 03:34:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 03:34:02,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 03:34:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 03:34:02,844 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 03:34:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-28 03:34:02,844 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-28 03:34:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 03:34:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 03:34:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 03:34:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 03:34:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 03:34:02,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 03:34:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 03:34:02,846 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 03:34:03,010 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 03:34:03,012 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 03:34:03,402 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 03:34:03,618 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 03:34:03,619 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-01-28 03:34:03,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:34:03 BoogieIcfgContainer [2023-01-28 03:34:03,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 03:34:03,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 03:34:03,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 03:34:03,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 03:34:03,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 03:34:02" (1/3) ... [2023-01-28 03:34:03,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72df0edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:34:03, skipping insertion in model container [2023-01-28 03:34:03,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:34:02" (2/3) ... [2023-01-28 03:34:03,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72df0edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:34:03, skipping insertion in model container [2023-01-28 03:34:03,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:34:03" (3/3) ... [2023-01-28 03:34:03,627 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-01-28 03:34:03,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 03:34:03,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 03:34:03,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 03:34:03,736 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 03:34:03,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 206 transitions, 444 flow [2023-01-28 03:34:03,872 INFO L130 PetriNetUnfolder]: 15/202 cut-off events. [2023-01-28 03:34:03,872 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 03:34:03,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 202 events. 15/202 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 140 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-01-28 03:34:03,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 206 transitions, 444 flow [2023-01-28 03:34:03,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 190 transitions, 404 flow [2023-01-28 03:34:03,887 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 03:34:03,898 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 190 transitions, 404 flow [2023-01-28 03:34:03,900 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 190 transitions, 404 flow [2023-01-28 03:34:03,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 404 flow [2023-01-28 03:34:03,954 INFO L130 PetriNetUnfolder]: 15/190 cut-off events. [2023-01-28 03:34:03,955 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 03:34:03,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 190 events. 15/190 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 139 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-01-28 03:34:03,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-01-28 03:34:10,031 INFO L134 LiptonReduction]: Checked pairs total: 4288 [2023-01-28 03:34:10,031 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-01-28 03:34:10,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 03:34:10,048 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@58a3086a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 03:34:10,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 03:34:10,054 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2023-01-28 03:34:10,054 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 03:34:10,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:34:10,055 INFO L208 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] [2023-01-28 03:34:10,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:34:10,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:34:10,059 INFO L85 PathProgramCache]: Analyzing trace with hash 464994653, now seen corresponding path program 1 times [2023-01-28 03:34:10,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:34:10,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411207119] [2023-01-28 03:34:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:10,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:34:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:34:10,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:34:10,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411207119] [2023-01-28 03:34:10,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411207119] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:34:10,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:34:10,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 03:34:10,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508220519] [2023-01-28 03:34:10,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:34:10,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:34:10,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:34:10,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:34:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:34:10,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-01-28 03:34:10,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:10,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:34:10,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-01-28 03:34:10,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:34:11,069 INFO L130 PetriNetUnfolder]: 1952/2593 cut-off events. [2023-01-28 03:34:11,069 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2023-01-28 03:34:11,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2593 events. 1952/2593 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9346 event pairs, 624 based on Foata normal form. 1/1889 useless extension candidates. Maximal degree in co-relation 4200. Up to 1650 conditions per place. [2023-01-28 03:34:11,088 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 51 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2023-01-28 03:34:11,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 273 flow [2023-01-28 03:34:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:34:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:34:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-01-28 03:34:11,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48083333333333333 [2023-01-28 03:34:11,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-01-28 03:34:11,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-01-28 03:34:11,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:34:11,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-01-28 03:34:11,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:11,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:11,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:11,117 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 86 flow. Second operand 3 states and 577 transitions. [2023-01-28 03:34:11,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 273 flow [2023-01-28 03:34:11,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-28 03:34:11,124 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 103 flow [2023-01-28 03:34:11,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2023-01-28 03:34:11,128 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-01-28 03:34:11,128 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 103 flow [2023-01-28 03:34:11,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:11,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:34:11,129 INFO L208 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] [2023-01-28 03:34:11,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 03:34:11,130 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:34:11,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:34:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1582094128, now seen corresponding path program 1 times [2023-01-28 03:34:11,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:34:11,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318841173] [2023-01-28 03:34:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:11,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:34:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:34:11,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:34:11,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318841173] [2023-01-28 03:34:11,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318841173] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:34:11,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:34:11,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:34:11,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298363947] [2023-01-28 03:34:11,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:34:11,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:34:11,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:34:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:34:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:34:11,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 400 [2023-01-28 03:34:11,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:11,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:34:11,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 400 [2023-01-28 03:34:11,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:34:11,809 INFO L130 PetriNetUnfolder]: 2683/3652 cut-off events. [2023-01-28 03:34:11,809 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2023-01-28 03:34:11,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8759 conditions, 3652 events. 2683/3652 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13796 event pairs, 1920 based on Foata normal form. 1/2761 useless extension candidates. Maximal degree in co-relation 2969. Up to 2594 conditions per place. [2023-01-28 03:34:11,824 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 34 selfloop transitions, 2 changer transitions 26/62 dead transitions. [2023-01-28 03:34:11,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 302 flow [2023-01-28 03:34:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:34:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:34:11,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2023-01-28 03:34:11,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436875 [2023-01-28 03:34:11,829 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2023-01-28 03:34:11,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2023-01-28 03:34:11,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:34:11,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2023-01-28 03:34:11,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:11,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:11,835 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:11,835 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 103 flow. Second operand 4 states and 699 transitions. [2023-01-28 03:34:11,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 302 flow [2023-01-28 03:34:11,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 03:34:11,838 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 116 flow [2023-01-28 03:34:11,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-01-28 03:34:11,839 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-01-28 03:34:11,839 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 116 flow [2023-01-28 03:34:11,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:11,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:34:11,840 INFO L208 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] [2023-01-28 03:34:11,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 03:34:11,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:34:11,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:34:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1000104662, now seen corresponding path program 1 times [2023-01-28 03:34:11,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:34:11,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356649236] [2023-01-28 03:34:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:11,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:34:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:34:12,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:34:12,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356649236] [2023-01-28 03:34:12,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356649236] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:34:12,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:34:12,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:34:12,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523152833] [2023-01-28 03:34:12,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:34:12,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:34:12,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:34:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:34:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:34:12,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-01-28 03:34:12,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:12,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:34:12,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-01-28 03:34:12,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:34:12,611 INFO L130 PetriNetUnfolder]: 4054/5356 cut-off events. [2023-01-28 03:34:12,611 INFO L131 PetriNetUnfolder]: For 1510/1510 co-relation queries the response was YES. [2023-01-28 03:34:12,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13107 conditions, 5356 events. 4054/5356 cut-off events. For 1510/1510 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21895 event pairs, 826 based on Foata normal form. 1/4625 useless extension candidates. Maximal degree in co-relation 13094. Up to 2129 conditions per place. [2023-01-28 03:34:12,639 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 84 selfloop transitions, 8 changer transitions 1/93 dead transitions. [2023-01-28 03:34:12,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 93 transitions, 472 flow [2023-01-28 03:34:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:34:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:34:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 773 transitions. [2023-01-28 03:34:12,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483125 [2023-01-28 03:34:12,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 773 transitions. [2023-01-28 03:34:12,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 773 transitions. [2023-01-28 03:34:12,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:34:12,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 773 transitions. [2023-01-28 03:34:12,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:12,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:12,647 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:12,647 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 116 flow. Second operand 4 states and 773 transitions. [2023-01-28 03:34:12,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 93 transitions, 472 flow [2023-01-28 03:34:12,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 93 transitions, 464 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 03:34:12,651 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 174 flow [2023-01-28 03:34:12,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-01-28 03:34:12,652 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-01-28 03:34:12,652 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 174 flow [2023-01-28 03:34:12,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:12,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:34:12,652 INFO L208 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] [2023-01-28 03:34:12,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 03:34:12,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:34:12,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:34:12,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1282271029, now seen corresponding path program 1 times [2023-01-28 03:34:12,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:34:12,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619393434] [2023-01-28 03:34:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:12,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:34:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:34:12,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:34:12,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619393434] [2023-01-28 03:34:12,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619393434] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:34:12,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719300215] [2023-01-28 03:34:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:12,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:34:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:34:12,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:34:12,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 03:34:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:13,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 03:34:13,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:34:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:34:13,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:34:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:34:13,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719300215] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:34:13,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:34:13,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2023-01-28 03:34:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206088839] [2023-01-28 03:34:13,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:34:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 03:34:13,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:34:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 03:34:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-28 03:34:13,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 400 [2023-01-28 03:34:13,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 174 flow. Second operand has 9 states, 9 states have (on average 164.11111111111111) internal successors, (1477), 9 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:13,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:34:13,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 400 [2023-01-28 03:34:13,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:34:14,440 INFO L130 PetriNetUnfolder]: 6835/9086 cut-off events. [2023-01-28 03:34:14,440 INFO L131 PetriNetUnfolder]: For 5784/5784 co-relation queries the response was YES. [2023-01-28 03:34:14,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25294 conditions, 9086 events. 6835/9086 cut-off events. For 5784/5784 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39953 event pairs, 328 based on Foata normal form. 134/9220 useless extension candidates. Maximal degree in co-relation 24836. Up to 4607 conditions per place. [2023-01-28 03:34:14,492 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 126 selfloop transitions, 23 changer transitions 36/185 dead transitions. [2023-01-28 03:34:14,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 185 transitions, 997 flow [2023-01-28 03:34:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 03:34:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 03:34:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1886 transitions. [2023-01-28 03:34:14,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42863636363636365 [2023-01-28 03:34:14,497 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1886 transitions. [2023-01-28 03:34:14,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1886 transitions. [2023-01-28 03:34:14,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:34:14,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1886 transitions. [2023-01-28 03:34:14,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 171.45454545454547) internal successors, (1886), 11 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:14,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:14,510 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:14,510 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 174 flow. Second operand 11 states and 1886 transitions. [2023-01-28 03:34:14,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 185 transitions, 997 flow [2023-01-28 03:34:14,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 185 transitions, 969 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-01-28 03:34:14,531 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 352 flow [2023-01-28 03:34:14,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=352, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-01-28 03:34:14,532 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2023-01-28 03:34:14,532 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 352 flow [2023-01-28 03:34:14,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 164.11111111111111) internal successors, (1477), 9 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:14,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:34:14,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:34:14,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 03:34:14,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:34:14,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:34:14,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:34:14,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1124719134, now seen corresponding path program 1 times [2023-01-28 03:34:14,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:34:14,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029442316] [2023-01-28 03:34:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:14,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:34:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:34:15,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:34:15,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029442316] [2023-01-28 03:34:15,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029442316] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:34:15,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975606773] [2023-01-28 03:34:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:15,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:34:15,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:34:15,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:34:15,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 03:34:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:15,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 03:34:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:34:16,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-01-28 03:34:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:34:16,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:34:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:34:16,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975606773] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:34:16,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:34:16,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 22 [2023-01-28 03:34:16,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681881205] [2023-01-28 03:34:16,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:34:16,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 03:34:16,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:34:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 03:34:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-01-28 03:34:16,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 400 [2023-01-28 03:34:16,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 352 flow. Second operand has 23 states, 23 states have (on average 139.6086956521739) internal successors, (3211), 23 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:16,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:34:16,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 400 [2023-01-28 03:34:16,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:34:22,862 INFO L130 PetriNetUnfolder]: 36653/48434 cut-off events. [2023-01-28 03:34:22,862 INFO L131 PetriNetUnfolder]: For 54698/54698 co-relation queries the response was YES. [2023-01-28 03:34:22,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147025 conditions, 48434 events. 36653/48434 cut-off events. For 54698/54698 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 265481 event pairs, 1658 based on Foata normal form. 322/48756 useless extension candidates. Maximal degree in co-relation 112987. Up to 14938 conditions per place. [2023-01-28 03:34:23,183 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 438 selfloop transitions, 273 changer transitions 51/762 dead transitions. [2023-01-28 03:34:23,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 762 transitions, 5071 flow [2023-01-28 03:34:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 03:34:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 03:34:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5336 transitions. [2023-01-28 03:34:23,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811428571428571 [2023-01-28 03:34:23,199 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5336 transitions. [2023-01-28 03:34:23,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5336 transitions. [2023-01-28 03:34:23,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:34:23,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5336 transitions. [2023-01-28 03:34:23,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 152.45714285714286) internal successors, (5336), 35 states have internal predecessors, (5336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:23,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 400.0) internal successors, (14400), 36 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:23,342 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 400.0) internal successors, (14400), 36 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:23,342 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 352 flow. Second operand 35 states and 5336 transitions. [2023-01-28 03:34:23,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 762 transitions, 5071 flow [2023-01-28 03:34:23,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 762 transitions, 4739 flow, removed 165 selfloop flow, removed 2 redundant places. [2023-01-28 03:34:23,471 INFO L231 Difference]: Finished difference. Result has 113 places, 385 transitions, 3471 flow [2023-01-28 03:34:23,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3471, PETRI_PLACES=113, PETRI_TRANSITIONS=385} [2023-01-28 03:34:23,472 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 74 predicate places. [2023-01-28 03:34:23,472 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 385 transitions, 3471 flow [2023-01-28 03:34:23,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 139.6086956521739) internal successors, (3211), 23 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:23,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:34:23,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:34:23,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 03:34:23,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:34:23,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:34:23,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:34:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1911556981, now seen corresponding path program 1 times [2023-01-28 03:34:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:34:23,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302765145] [2023-01-28 03:34:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:23,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:34:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:34:24,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:34:24,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302765145] [2023-01-28 03:34:24,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302765145] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:34:24,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787996450] [2023-01-28 03:34:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:24,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:34:24,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:34:24,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:34:24,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 03:34:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:24,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 03:34:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:34:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:34:24,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 03:34:24,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:34:24,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-01-28 03:34:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:34:24,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:34:25,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-01-28 03:34:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:34:25,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787996450] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:34:25,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:34:25,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2023-01-28 03:34:25,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230693442] [2023-01-28 03:34:25,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:34:25,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 03:34:25,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:34:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 03:34:25,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=520, Unknown=8, NotChecked=0, Total=600 [2023-01-28 03:34:25,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-01-28 03:34:25,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 385 transitions, 3471 flow. Second operand has 25 states, 25 states have (on average 135.2) internal successors, (3380), 25 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:25,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:34:25,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-01-28 03:34:25,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:34:33,030 INFO L130 PetriNetUnfolder]: 41995/55463 cut-off events. [2023-01-28 03:34:33,030 INFO L131 PetriNetUnfolder]: For 248015/248015 co-relation queries the response was YES. [2023-01-28 03:34:33,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230637 conditions, 55463 events. 41995/55463 cut-off events. For 248015/248015 co-relation queries the response was YES. Maximal size of possible extension queue 1989. Compared 307169 event pairs, 7141 based on Foata normal form. 3/55466 useless extension candidates. Maximal degree in co-relation 203666. Up to 37297 conditions per place. [2023-01-28 03:34:33,671 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 521 selfloop transitions, 206 changer transitions 14/741 dead transitions. [2023-01-28 03:34:33,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 741 transitions, 7726 flow [2023-01-28 03:34:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 03:34:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 03:34:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2516 transitions. [2023-01-28 03:34:33,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37 [2023-01-28 03:34:33,680 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2516 transitions. [2023-01-28 03:34:33,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2516 transitions. [2023-01-28 03:34:33,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:34:33,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2516 transitions. [2023-01-28 03:34:33,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 148.0) internal successors, (2516), 17 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:33,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:33,696 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:33,696 INFO L175 Difference]: Start difference. First operand has 113 places, 385 transitions, 3471 flow. Second operand 17 states and 2516 transitions. [2023-01-28 03:34:33,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 741 transitions, 7726 flow [2023-01-28 03:34:38,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 741 transitions, 7376 flow, removed 173 selfloop flow, removed 3 redundant places. [2023-01-28 03:34:38,066 INFO L231 Difference]: Finished difference. Result has 134 places, 544 transitions, 5484 flow [2023-01-28 03:34:38,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5484, PETRI_PLACES=134, PETRI_TRANSITIONS=544} [2023-01-28 03:34:38,067 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2023-01-28 03:34:38,067 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 544 transitions, 5484 flow [2023-01-28 03:34:38,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 135.2) internal successors, (3380), 25 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:38,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:34:38,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:34:38,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 03:34:38,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:34:38,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:34:38,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:34:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1439824054, now seen corresponding path program 1 times [2023-01-28 03:34:38,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:34:38,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138716820] [2023-01-28 03:34:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:38,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:34:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:34:39,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:34:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138716820] [2023-01-28 03:34:39,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138716820] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:34:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600614552] [2023-01-28 03:34:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:34:39,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:34:39,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:34:39,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:34:39,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 03:34:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:34:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 03:34:39,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:34:39,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:34:39,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 03:34:39,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:34:39,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 03:34:39,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:34:39,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-01-28 03:34:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:34:40,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:34:40,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 75 [2023-01-28 03:34:40,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 61 [2023-01-28 03:34:40,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-01-28 03:34:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:34:40,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600614552] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:34:40,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:34:40,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-01-28 03:34:40,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42772087] [2023-01-28 03:34:40,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:34:40,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 03:34:40,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:34:40,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 03:34:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=805, Unknown=3, NotChecked=0, Total=930 [2023-01-28 03:34:40,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-01-28 03:34:40,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 544 transitions, 5484 flow. Second operand has 31 states, 31 states have (on average 128.70967741935485) internal successors, (3990), 31 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:34:40,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:34:40,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-01-28 03:34:40,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:34:48,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:34:50,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:34:52,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:34:58,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:00,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:02,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:05,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:07,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:16,130 WARN L222 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 53 DAG size of output: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:35:19,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:22,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:29,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:33,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:36,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:38,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:40,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:43,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:45,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:47,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:49,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:35:54,193 INFO L130 PetriNetUnfolder]: 62353/82346 cut-off events. [2023-01-28 03:35:54,194 INFO L131 PetriNetUnfolder]: For 433660/433660 co-relation queries the response was YES. [2023-01-28 03:35:54,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350747 conditions, 82346 events. 62353/82346 cut-off events. For 433660/433660 co-relation queries the response was YES. Maximal size of possible extension queue 3008. Compared 479771 event pairs, 5914 based on Foata normal form. 10/82356 useless extension candidates. Maximal degree in co-relation 350681. Up to 44296 conditions per place. [2023-01-28 03:35:55,085 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 1016 selfloop transitions, 757 changer transitions 44/1817 dead transitions. [2023-01-28 03:35:55,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 1817 transitions, 18763 flow [2023-01-28 03:35:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-01-28 03:35:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-01-28 03:35:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 8066 transitions. [2023-01-28 03:35:55,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3537719298245614 [2023-01-28 03:35:55,107 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 8066 transitions. [2023-01-28 03:35:55,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 8066 transitions. [2023-01-28 03:35:55,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:35:55,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 8066 transitions. [2023-01-28 03:35:55,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 141.50877192982455) internal successors, (8066), 57 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:35:55,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 400.0) internal successors, (23200), 58 states have internal predecessors, (23200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:35:55,152 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 400.0) internal successors, (23200), 58 states have internal predecessors, (23200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:35:55,152 INFO L175 Difference]: Start difference. First operand has 134 places, 544 transitions, 5484 flow. Second operand 57 states and 8066 transitions. [2023-01-28 03:35:55,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 1817 transitions, 18763 flow [2023-01-28 03:36:03,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 1817 transitions, 18287 flow, removed 172 selfloop flow, removed 6 redundant places. [2023-01-28 03:36:03,527 INFO L231 Difference]: Finished difference. Result has 207 places, 1228 transitions, 15346 flow [2023-01-28 03:36:03,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=15346, PETRI_PLACES=207, PETRI_TRANSITIONS=1228} [2023-01-28 03:36:03,528 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 168 predicate places. [2023-01-28 03:36:03,528 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 1228 transitions, 15346 flow [2023-01-28 03:36:03,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 128.70967741935485) internal successors, (3990), 31 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:36:03,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:36:03,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:36:03,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 03:36:03,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:36:03,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:36:03,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:36:03,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1855680392, now seen corresponding path program 2 times [2023-01-28 03:36:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:36:03,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772813744] [2023-01-28 03:36:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:36:03,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:36:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:36:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:36:04,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:36:04,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772813744] [2023-01-28 03:36:04,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772813744] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:36:04,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745808687] [2023-01-28 03:36:04,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:36:04,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:36:04,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:36:04,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:36:04,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 03:36:04,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:36:04,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:36:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-28 03:36:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:36:04,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:36:04,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 03:36:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:36:05,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 03:36:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:36:05,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 03:36:05,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-01-28 03:36:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:36:05,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:36:07,799 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-01-28 03:36:07,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 506 treesize of output 364 [2023-01-28 03:36:07,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 76 [2023-01-28 03:36:07,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 129 [2023-01-28 03:36:07,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 59 [2023-01-28 03:36:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:36:08,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745808687] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:36:08,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:36:08,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 29 [2023-01-28 03:36:08,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246197261] [2023-01-28 03:36:08,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:36:08,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 03:36:08,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:36:08,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 03:36:08,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=765, Unknown=6, NotChecked=0, Total=930 [2023-01-28 03:36:08,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-01-28 03:36:08,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 1228 transitions, 15346 flow. Second operand has 31 states, 31 states have (on average 128.67741935483872) internal successors, (3989), 31 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:36:08,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:36:08,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-01-28 03:36:08,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:36:11,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:36:13,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:36:15,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:36:17,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:36:19,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:36:26,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:36:49,028 INFO L130 PetriNetUnfolder]: 83769/110568 cut-off events. [2023-01-28 03:36:49,028 INFO L131 PetriNetUnfolder]: For 746368/746368 co-relation queries the response was YES. [2023-01-28 03:36:50,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538228 conditions, 110568 events. 83769/110568 cut-off events. For 746368/746368 co-relation queries the response was YES. Maximal size of possible extension queue 4179. Compared 666580 event pairs, 7011 based on Foata normal form. 11/110579 useless extension candidates. Maximal degree in co-relation 538140. Up to 73326 conditions per place. [2023-01-28 03:36:50,827 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 1072 selfloop transitions, 1633 changer transitions 11/2716 dead transitions. [2023-01-28 03:36:50,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 2716 transitions, 36299 flow [2023-01-28 03:36:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 03:36:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 03:36:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5895 transitions. [2023-01-28 03:36:50,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508928571428571 [2023-01-28 03:36:50,835 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5895 transitions. [2023-01-28 03:36:50,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5895 transitions. [2023-01-28 03:36:50,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:36:50,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5895 transitions. [2023-01-28 03:36:50,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 140.35714285714286) internal successors, (5895), 42 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:36:50,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:36:50,862 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:36:50,862 INFO L175 Difference]: Start difference. First operand has 207 places, 1228 transitions, 15346 flow. Second operand 42 states and 5895 transitions. [2023-01-28 03:36:50,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 2716 transitions, 36299 flow [2023-01-28 03:37:24,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 2716 transitions, 32244 flow, removed 1947 selfloop flow, removed 10 redundant places. [2023-01-28 03:37:24,781 INFO L231 Difference]: Finished difference. Result has 263 places, 2317 transitions, 31284 flow [2023-01-28 03:37:24,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=13009, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=727, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=31284, PETRI_PLACES=263, PETRI_TRANSITIONS=2317} [2023-01-28 03:37:24,782 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 224 predicate places. [2023-01-28 03:37:24,782 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 2317 transitions, 31284 flow [2023-01-28 03:37:24,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 128.67741935483872) internal successors, (3989), 31 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:37:24,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:37:24,783 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:37:24,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 03:37:24,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:37:24,989 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:37:24,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:37:24,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1615068153, now seen corresponding path program 1 times [2023-01-28 03:37:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:37:24,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259976065] [2023-01-28 03:37:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:37:24,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:37:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:37:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:37:25,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:37:25,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259976065] [2023-01-28 03:37:25,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259976065] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:37:25,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38229483] [2023-01-28 03:37:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:37:25,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:37:25,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:37:25,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:37:25,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 03:37:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:37:25,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 03:37:25,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:37:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:37:26,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 03:37:26,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:37:26,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-01-28 03:37:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:37:26,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:37:26,401 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_473 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_473) c_~x~0.base) (+ c_~x~0.offset (* c_~i1~0 4))) c_~s2~0) c_~s1~0)) is different from false [2023-01-28 03:37:26,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-01-28 03:37:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 03:37:26,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38229483] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:37:26,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:37:26,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2023-01-28 03:37:26,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398414423] [2023-01-28 03:37:26,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:37:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 03:37:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:37:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 03:37:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=476, Unknown=7, NotChecked=44, Total=600 [2023-01-28 03:37:26,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-01-28 03:37:26,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 2317 transitions, 31284 flow. Second operand has 25 states, 25 states have (on average 134.96) internal successors, (3374), 25 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:37:26,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:37:26,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-01-28 03:37:26,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:38:00,610 INFO L130 PetriNetUnfolder]: 91543/120830 cut-off events. [2023-01-28 03:38:00,610 INFO L131 PetriNetUnfolder]: For 810033/810033 co-relation queries the response was YES. [2023-01-28 03:38:03,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635609 conditions, 120830 events. 91543/120830 cut-off events. For 810033/810033 co-relation queries the response was YES. Maximal size of possible extension queue 4609. Compared 732565 event pairs, 16146 based on Foata normal form. 3/120833 useless extension candidates. Maximal degree in co-relation 635499. Up to 110133 conditions per place. [2023-01-28 03:38:03,469 INFO L137 encePairwiseOnDemand]: 377/400 looper letters, 2243 selfloop transitions, 523 changer transitions 20/2786 dead transitions. [2023-01-28 03:38:03,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 2786 transitions, 41312 flow [2023-01-28 03:38:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 03:38:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 03:38:03,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3364 transitions. [2023-01-28 03:38:03,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3656521739130435 [2023-01-28 03:38:03,474 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3364 transitions. [2023-01-28 03:38:03,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3364 transitions. [2023-01-28 03:38:03,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:38:03,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3364 transitions. [2023-01-28 03:38:03,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 146.2608695652174) internal successors, (3364), 23 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:38:03,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:38:03,486 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:38:03,486 INFO L175 Difference]: Start difference. First operand has 263 places, 2317 transitions, 31284 flow. Second operand 23 states and 3364 transitions. [2023-01-28 03:38:03,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 2786 transitions, 41312 flow [2023-01-28 03:38:48,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 2786 transitions, 39493 flow, removed 898 selfloop flow, removed 4 redundant places. [2023-01-28 03:38:48,956 INFO L231 Difference]: Finished difference. Result has 292 places, 2586 transitions, 34768 flow [2023-01-28 03:38:48,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=29478, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=34768, PETRI_PLACES=292, PETRI_TRANSITIONS=2586} [2023-01-28 03:38:48,957 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 253 predicate places. [2023-01-28 03:38:48,958 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 2586 transitions, 34768 flow [2023-01-28 03:38:48,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 134.96) internal successors, (3374), 25 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:38:48,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:38:48,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:38:48,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 03:38:49,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:38:49,159 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:38:49,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:38:49,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2074877216, now seen corresponding path program 2 times [2023-01-28 03:38:49,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:38:49,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142005159] [2023-01-28 03:38:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:38:49,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:38:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:38:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:38:49,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:38:49,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142005159] [2023-01-28 03:38:49,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142005159] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:38:49,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789014543] [2023-01-28 03:38:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:38:49,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:38:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:38:49,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:38:49,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 03:38:50,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:38:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:38:50,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 03:38:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:38:50,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-28 03:38:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:38:50,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:38:50,704 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-01-28 03:38:50,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2023-01-28 03:38:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:38:50,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789014543] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:38:50,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:38:50,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 22 [2023-01-28 03:38:50,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834396335] [2023-01-28 03:38:50,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:38:50,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 03:38:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:38:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 03:38:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-01-28 03:38:50,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 400 [2023-01-28 03:38:50,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 2586 transitions, 34768 flow. Second operand has 23 states, 23 states have (on average 139.6086956521739) internal successors, (3211), 23 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:38:50,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:38:50,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 400 [2023-01-28 03:38:50,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:39:42,074 INFO L130 PetriNetUnfolder]: 114433/150997 cut-off events. [2023-01-28 03:39:42,075 INFO L131 PetriNetUnfolder]: For 1169030/1169030 co-relation queries the response was YES. [2023-01-28 03:39:45,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921465 conditions, 150997 events. 114433/150997 cut-off events. For 1169030/1169030 co-relation queries the response was YES. Maximal size of possible extension queue 5703. Compared 941451 event pairs, 18356 based on Foata normal form. 27/151024 useless extension candidates. Maximal degree in co-relation 921344. Up to 85877 conditions per place. [2023-01-28 03:39:45,983 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 2898 selfloop transitions, 1078 changer transitions 22/3998 dead transitions. [2023-01-28 03:39:45,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 3998 transitions, 58867 flow [2023-01-28 03:39:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-28 03:39:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-28 03:39:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 8399 transitions. [2023-01-28 03:39:46,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38177272727272726 [2023-01-28 03:39:46,100 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 8399 transitions. [2023-01-28 03:39:46,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 8399 transitions. [2023-01-28 03:39:46,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:39:46,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 8399 transitions. [2023-01-28 03:39:46,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 152.70909090909092) internal successors, (8399), 55 states have internal predecessors, (8399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:39:46,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 400.0) internal successors, (22400), 56 states have internal predecessors, (22400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:39:46,133 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 400.0) internal successors, (22400), 56 states have internal predecessors, (22400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:39:46,133 INFO L175 Difference]: Start difference. First operand has 292 places, 2586 transitions, 34768 flow. Second operand 55 states and 8399 transitions. [2023-01-28 03:39:46,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 3998 transitions, 58867 flow [2023-01-28 03:40:47,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 3998 transitions, 57329 flow, removed 747 selfloop flow, removed 5 redundant places. [2023-01-28 03:40:47,532 INFO L231 Difference]: Finished difference. Result has 379 places, 3347 transitions, 49066 flow [2023-01-28 03:40:47,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=33795, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=49066, PETRI_PLACES=379, PETRI_TRANSITIONS=3347} [2023-01-28 03:40:47,536 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 340 predicate places. [2023-01-28 03:40:47,536 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 3347 transitions, 49066 flow [2023-01-28 03:40:47,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 139.6086956521739) internal successors, (3211), 23 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:40:47,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:40:47,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:40:47,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 03:40:47,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:40:47,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 03:40:47,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:40:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash 803669675, now seen corresponding path program 2 times [2023-01-28 03:40:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:40:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999713620] [2023-01-28 03:40:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:40:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:40:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:40:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:40:48,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:40:48,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999713620] [2023-01-28 03:40:48,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999713620] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:40:48,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163438599] [2023-01-28 03:40:48,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:40:48,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:40:48,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:40:48,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:40:48,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 03:40:48,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:40:48,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:40:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 03:40:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:40:48,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:40:48,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-01-28 03:40:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:40:48,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:40:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:40:48,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163438599] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:40:48,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:40:48,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-01-28 03:40:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862334774] [2023-01-28 03:40:48,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:40:48,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 03:40:48,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:40:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 03:40:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-01-28 03:40:48,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 400 [2023-01-28 03:40:48,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 3347 transitions, 49066 flow. Second operand has 18 states, 18 states have (on average 144.05555555555554) internal successors, (2593), 18 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:40:48,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:40:48,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 400 [2023-01-28 03:40:48,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand