/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:56:36,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:56:36,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:56:36,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:56:36,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:56:36,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:56:36,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:56:36,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:56:36,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:56:36,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:56:36,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:56:36,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:56:36,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:56:36,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:56:36,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:56:36,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:56:36,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:56:36,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:56:36,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:56:36,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:56:36,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:56:36,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:56:36,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:56:36,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:56:36,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:56:36,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:56:36,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:56:36,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:56:36,860 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 [2023-01-27 17:56:36,887 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:56:36,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:56:36,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:56:36,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:56:36,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:56:36,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:56:36,889 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:56:36,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:56:36,890 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:56:36,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:56:36,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:56:36,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:56:36,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:56:36,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:56:36,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:56:36,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:56:36,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:56:36,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:56:36,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:56:36,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:56:36,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:56:36,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:56:36,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:56:37,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:56:37,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:56:37,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:56:37,118 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:56:37,119 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:56:37,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-01-27 17:56:38,197 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:56:38,336 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:56:38,336 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-01-27 17:56:38,342 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4327f0fa1/529ee34ea7284f1ca6e6596d66d5fcdf/FLAG601643d74 [2023-01-27 17:56:38,351 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4327f0fa1/529ee34ea7284f1ca6e6596d66d5fcdf [2023-01-27 17:56:38,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:56:38,353 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:56:38,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:56:38,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:56:38,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:56:38,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a37cb40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38, skipping insertion in model container [2023-01-27 17:56:38,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:56:38,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:56:38,636 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-01-27 17:56:38,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:56:38,651 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:56:38,685 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-01-27 17:56:38,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:56:38,710 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:56:38,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38 WrapperNode [2023-01-27 17:56:38,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:56:38,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:56:38,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:56:38,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:56:38,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,755 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2023-01-27 17:56:38,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:56:38,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:56:38,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:56:38,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:56:38,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,780 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:56:38,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:56:38,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:56:38,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:56:38,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (1/1) ... [2023-01-27 17:56:38,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:56:38,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:56:38,806 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) [2023-01-27 17:56:38,808 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 [2023-01-27 17:56:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-01-27 17:56:38,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-01-27 17:56:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:56:38,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:56:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:56:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:56:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:56:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:56:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:56:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:56:38,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:56:38,852 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:56:38,997 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:56:38,999 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:56:39,109 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:56:39,138 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:56:39,138 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 17:56:39,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:56:39 BoogieIcfgContainer [2023-01-27 17:56:39,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:56:39,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:56:39,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:56:39,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:56:39,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:56:38" (1/3) ... [2023-01-27 17:56:39,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346ae508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:56:39, skipping insertion in model container [2023-01-27 17:56:39,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:38" (2/3) ... [2023-01-27 17:56:39,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346ae508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:56:39, skipping insertion in model container [2023-01-27 17:56:39,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:56:39" (3/3) ... [2023-01-27 17:56:39,146 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-01-27 17:56:39,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:56:39,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:56:39,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:56:39,216 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:39,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 61 transitions, 132 flow [2023-01-27 17:56:39,289 INFO L130 PetriNetUnfolder]: 7/70 cut-off events. [2023-01-27 17:56:39,289 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:39,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-01-27 17:56:39,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 61 transitions, 132 flow [2023-01-27 17:56:39,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 60 transitions, 128 flow [2023-01-27 17:56:39,301 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:39,315 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 60 transitions, 128 flow [2023-01-27 17:56:39,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 60 transitions, 128 flow [2023-01-27 17:56:39,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 60 transitions, 128 flow [2023-01-27 17:56:39,341 INFO L130 PetriNetUnfolder]: 7/70 cut-off events. [2023-01-27 17:56:39,341 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:39,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-01-27 17:56:39,343 INFO L119 LiptonReduction]: Number of co-enabled transitions 1040 [2023-01-27 17:56:40,260 INFO L134 LiptonReduction]: Checked pairs total: 1951 [2023-01-27 17:56:40,261 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-01-27 17:56:40,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:40,278 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;@60c61a93, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:40,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:56:40,281 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 17:56:40,281 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:40,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:40,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:56:40,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 17:56:40,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:40,285 INFO L85 PathProgramCache]: Analyzing trace with hash 312627833, now seen corresponding path program 1 times [2023-01-27 17:56:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:40,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663716653] [2023-01-27 17:56:40,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:40,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:40,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663716653] [2023-01-27 17:56:40,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663716653] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:40,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:40,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:40,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878944852] [2023-01-27 17:56:40,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:40,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:56:40,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:40,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:56:40,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:56:40,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 104 [2023-01-27 17:56:40,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2023-01-27 17:56:40,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:40,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 104 [2023-01-27 17:56:40,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:40,602 INFO L130 PetriNetUnfolder]: 172/292 cut-off events. [2023-01-27 17:56:40,603 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:56:40,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 292 events. 172/292 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 973 event pairs, 49 based on Foata normal form. 12/279 useless extension candidates. Maximal degree in co-relation 584. Up to 205 conditions per place. [2023-01-27 17:56:40,606 INFO L137 encePairwiseOnDemand]: 96/104 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-01-27 17:56:40,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 102 flow [2023-01-27 17:56:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:56:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:56:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2023-01-27 17:56:40,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2023-01-27 17:56:40,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2023-01-27 17:56:40,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2023-01-27 17:56:40,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:40,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2023-01-27 17:56:40,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2023-01-27 17:56:40,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-01-27 17:56:40,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-01-27 17:56:40,631 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 52 flow. Second operand 3 states and 151 transitions. [2023-01-27 17:56:40,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 102 flow [2023-01-27 17:56:40,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:56:40,633 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 57 flow [2023-01-27 17:56:40,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-01-27 17:56:40,637 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-01-27 17:56:40,637 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 57 flow [2023-01-27 17:56:40,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2023-01-27 17:56:40,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:40,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:40,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:56:40,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 17:56:40,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:40,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1213610001, now seen corresponding path program 1 times [2023-01-27 17:56:40,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:40,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751108698] [2023-01-27 17:56:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:40,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:40,672 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:40,705 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:40,705 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:40,706 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:56:40,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:56:40,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-27 17:56:40,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:56:40,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:56:40,709 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:56:40,712 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:40,713 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:56:40,734 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:40,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 88 transitions, 200 flow [2023-01-27 17:56:40,754 INFO L130 PetriNetUnfolder]: 10/95 cut-off events. [2023-01-27 17:56:40,754 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:56:40,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 104. Up to 6 conditions per place. [2023-01-27 17:56:40,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 88 transitions, 200 flow [2023-01-27 17:56:40,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 73 transitions, 161 flow [2023-01-27 17:56:40,756 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:40,756 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 73 transitions, 161 flow [2023-01-27 17:56:40,757 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 73 transitions, 161 flow [2023-01-27 17:56:40,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 161 flow [2023-01-27 17:56:40,762 INFO L130 PetriNetUnfolder]: 10/95 cut-off events. [2023-01-27 17:56:40,763 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:56:40,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-01-27 17:56:40,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 2002 [2023-01-27 17:56:41,670 INFO L134 LiptonReduction]: Checked pairs total: 5986 [2023-01-27 17:56:41,670 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-01-27 17:56:41,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:41,672 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;@60c61a93, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:41,672 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 17:56:41,673 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-01-27 17:56:41,673 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:41,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:41,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:56:41,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 17:56:41,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash 466134105, now seen corresponding path program 1 times [2023-01-27 17:56:41,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:41,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93999402] [2023-01-27 17:56:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:41,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:41,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:41,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93999402] [2023-01-27 17:56:41,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93999402] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:41,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:41,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:41,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053975004] [2023-01-27 17:56:41,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:41,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:56:41,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:56:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:56:41,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 134 [2023-01-27 17:56:41,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-01-27 17:56:41,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:41,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 134 [2023-01-27 17:56:41,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:41,838 INFO L130 PetriNetUnfolder]: 1215/1873 cut-off events. [2023-01-27 17:56:41,838 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-01-27 17:56:41,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3746 conditions, 1873 events. 1215/1873 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9609 event pairs, 283 based on Foata normal form. 0/1791 useless extension candidates. Maximal degree in co-relation 3735. Up to 1432 conditions per place. [2023-01-27 17:56:41,849 INFO L137 encePairwiseOnDemand]: 125/134 looper letters, 28 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-01-27 17:56:41,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 160 flow [2023-01-27 17:56:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:56:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:56:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-01-27 17:56:41,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2023-01-27 17:56:41,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-01-27 17:56:41,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-01-27 17:56:41,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:41,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-01-27 17:56:41,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-01-27 17:56:41,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-01-27 17:56:41,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-01-27 17:56:41,856 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 81 flow. Second operand 3 states and 192 transitions. [2023-01-27 17:56:41,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 160 flow [2023-01-27 17:56:41,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 157 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 17:56:41,858 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 87 flow [2023-01-27 17:56:41,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-01-27 17:56:41,858 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2023-01-27 17:56:41,858 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 87 flow [2023-01-27 17:56:41,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-01-27 17:56:41,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:41,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:41,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:56:41,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 17:56:41,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash -317088850, now seen corresponding path program 1 times [2023-01-27 17:56:41,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:41,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978479149] [2023-01-27 17:56:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:41,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:41,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:41,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978479149] [2023-01-27 17:56:41,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978479149] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:41,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:41,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:56:41,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268575277] [2023-01-27 17:56:41,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:41,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:56:41,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:56:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:56:41,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 134 [2023-01-27 17:56:41,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-01-27 17:56:41,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:41,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 134 [2023-01-27 17:56:41,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:41,999 INFO L130 PetriNetUnfolder]: 90/300 cut-off events. [2023-01-27 17:56:41,999 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 17:56:42,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 300 events. 90/300 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1431 event pairs, 20 based on Foata normal form. 86/385 useless extension candidates. Maximal degree in co-relation 549. Up to 104 conditions per place. [2023-01-27 17:56:42,000 INFO L137 encePairwiseOnDemand]: 128/134 looper letters, 11 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-01-27 17:56:42,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 137 flow [2023-01-27 17:56:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:56:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:56:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-01-27 17:56:42,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049751243781094 [2023-01-27 17:56:42,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-01-27 17:56:42,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-01-27 17:56:42,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:42,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-01-27 17:56:42,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2023-01-27 17:56:42,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-01-27 17:56:42,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-01-27 17:56:42,020 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 87 flow. Second operand 3 states and 203 transitions. [2023-01-27 17:56:42,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 137 flow [2023-01-27 17:56:42,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:56:42,021 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 96 flow [2023-01-27 17:56:42,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-01-27 17:56:42,022 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-01-27 17:56:42,022 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 96 flow [2023-01-27 17:56:42,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-01-27 17:56:42,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:42,022 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:42,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:56:42,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 17:56:42,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:42,023 INFO L85 PathProgramCache]: Analyzing trace with hash 301038790, now seen corresponding path program 1 times [2023-01-27 17:56:42,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:42,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394010246] [2023-01-27 17:56:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:42,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:42,044 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:42,044 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:42,044 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 17:56:42,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 17:56:42,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-01-27 17:56:42,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 17:56:42,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 17:56:42,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:56:42,045 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 17:56:42,046 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:42,046 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:56:42,068 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:42,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 272 flow [2023-01-27 17:56:42,080 INFO L130 PetriNetUnfolder]: 13/120 cut-off events. [2023-01-27 17:56:42,080 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:56:42,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-01-27 17:56:42,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 272 flow [2023-01-27 17:56:42,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 86 transitions, 196 flow [2023-01-27 17:56:42,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:42,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 86 transitions, 196 flow [2023-01-27 17:56:42,083 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 86 transitions, 196 flow [2023-01-27 17:56:42,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 86 transitions, 196 flow [2023-01-27 17:56:42,090 INFO L130 PetriNetUnfolder]: 13/120 cut-off events. [2023-01-27 17:56:42,090 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:56:42,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 113. Up to 8 conditions per place. [2023-01-27 17:56:42,092 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-01-27 17:56:42,934 INFO L134 LiptonReduction]: Checked pairs total: 11749 [2023-01-27 17:56:42,934 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-01-27 17:56:42,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:42,937 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;@60c61a93, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:42,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:56:42,938 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 17:56:42,938 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:42,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:42,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:56:42,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:56:42,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:42,939 INFO L85 PathProgramCache]: Analyzing trace with hash 650129635, now seen corresponding path program 1 times [2023-01-27 17:56:42,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:42,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927967272] [2023-01-27 17:56:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:42,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:42,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:42,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927967272] [2023-01-27 17:56:42,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927967272] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:42,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:42,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:42,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500110813] [2023-01-27 17:56:42,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:42,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:56:42,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:56:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:56:42,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 166 [2023-01-27 17:56:42,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2023-01-27 17:56:42,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:42,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 166 [2023-01-27 17:56:42,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:43,663 INFO L130 PetriNetUnfolder]: 9707/13472 cut-off events. [2023-01-27 17:56:43,663 INFO L131 PetriNetUnfolder]: For 1447/1447 co-relation queries the response was YES. [2023-01-27 17:56:43,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27132 conditions, 13472 events. 9707/13472 cut-off events. For 1447/1447 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 78260 event pairs, 2171 based on Foata normal form. 0/12948 useless extension candidates. Maximal degree in co-relation 27120. Up to 11498 conditions per place. [2023-01-27 17:56:43,740 INFO L137 encePairwiseOnDemand]: 155/166 looper letters, 37 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-01-27 17:56:43,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 220 flow [2023-01-27 17:56:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:56:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:56:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-01-27 17:56:43,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46987951807228917 [2023-01-27 17:56:43,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-01-27 17:56:43,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-01-27 17:56:43,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:43,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-01-27 17:56:43,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2023-01-27 17:56:43,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2023-01-27 17:56:43,744 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2023-01-27 17:56:43,744 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 110 flow. Second operand 3 states and 234 transitions. [2023-01-27 17:56:43,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 220 flow [2023-01-27 17:56:43,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 211 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-27 17:56:43,746 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 115 flow [2023-01-27 17:56:43,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-01-27 17:56:43,746 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2023-01-27 17:56:43,747 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 115 flow [2023-01-27 17:56:43,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2023-01-27 17:56:43,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:43,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:43,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:56:43,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:56:43,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash -277914766, now seen corresponding path program 1 times [2023-01-27 17:56:43,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:43,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103222988] [2023-01-27 17:56:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:43,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:43,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103222988] [2023-01-27 17:56:43,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103222988] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:43,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:43,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:56:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670901237] [2023-01-27 17:56:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:43,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:56:43,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:43,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:56:43,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:56:43,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 166 [2023-01-27 17:56:43,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2023-01-27 17:56:43,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:43,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 166 [2023-01-27 17:56:43,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:43,855 INFO L130 PetriNetUnfolder]: 240/785 cut-off events. [2023-01-27 17:56:43,856 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-01-27 17:56:43,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 785 events. 240/785 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4868 event pairs, 49 based on Foata normal form. 326/1102 useless extension candidates. Maximal degree in co-relation 1442. Up to 273 conditions per place. [2023-01-27 17:56:43,858 INFO L137 encePairwiseOnDemand]: 158/166 looper letters, 13 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2023-01-27 17:56:43,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 180 flow [2023-01-27 17:56:43,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:56:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:56:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-01-27 17:56:43,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080321285140562 [2023-01-27 17:56:43,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-01-27 17:56:43,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-01-27 17:56:43,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:43,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-01-27 17:56:43,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2023-01-27 17:56:43,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2023-01-27 17:56:43,864 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2023-01-27 17:56:43,864 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 115 flow. Second operand 3 states and 253 transitions. [2023-01-27 17:56:43,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 180 flow [2023-01-27 17:56:43,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:56:43,870 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 127 flow [2023-01-27 17:56:43,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-01-27 17:56:43,871 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-01-27 17:56:43,871 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 127 flow [2023-01-27 17:56:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2023-01-27 17:56:43,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:43,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:43,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:56:43,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:56:43,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash -494400844, now seen corresponding path program 1 times [2023-01-27 17:56:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:43,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042740487] [2023-01-27 17:56:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:43,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:43,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:43,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042740487] [2023-01-27 17:56:43,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042740487] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:43,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:43,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:56:43,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371217156] [2023-01-27 17:56:43,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:43,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:56:43,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:56:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:56:43,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 166 [2023-01-27 17:56:43,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 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) [2023-01-27 17:56:43,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:43,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 166 [2023-01-27 17:56:43,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:44,082 INFO L130 PetriNetUnfolder]: 721/1566 cut-off events. [2023-01-27 17:56:44,083 INFO L131 PetriNetUnfolder]: For 453/453 co-relation queries the response was YES. [2023-01-27 17:56:44,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4085 conditions, 1566 events. 721/1566 cut-off events. For 453/453 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10777 event pairs, 59 based on Foata normal form. 12/1574 useless extension candidates. Maximal degree in co-relation 4071. Up to 914 conditions per place. [2023-01-27 17:56:44,089 INFO L137 encePairwiseOnDemand]: 155/166 looper letters, 61 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2023-01-27 17:56:44,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 431 flow [2023-01-27 17:56:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:56:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:56:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 411 transitions. [2023-01-27 17:56:44,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126506024096386 [2023-01-27 17:56:44,090 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 411 transitions. [2023-01-27 17:56:44,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 411 transitions. [2023-01-27 17:56:44,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:44,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 411 transitions. [2023-01-27 17:56:44,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.5) internal successors, (411), 6 states have internal predecessors, (411), 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) [2023-01-27 17:56:44,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 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) [2023-01-27 17:56:44,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 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) [2023-01-27 17:56:44,093 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 127 flow. Second operand 6 states and 411 transitions. [2023-01-27 17:56:44,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 431 flow [2023-01-27 17:56:44,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 81 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:56:44,095 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 207 flow [2023-01-27 17:56:44,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-01-27 17:56:44,095 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-01-27 17:56:44,095 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 207 flow [2023-01-27 17:56:44,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 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) [2023-01-27 17:56:44,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:44,096 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:44,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 17:56:44,096 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:56:44,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2022817787, now seen corresponding path program 1 times [2023-01-27 17:56:44,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:44,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796616352] [2023-01-27 17:56:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:44,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:44,114 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:44,126 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:44,126 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:44,126 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 17:56:44,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 17:56:44,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-01-27 17:56:44,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 17:56:44,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 17:56:44,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 17:56:44,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 17:56:44,127 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-27 17:56:44,128 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:44,128 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 17:56:44,147 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:44,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 142 transitions, 348 flow [2023-01-27 17:56:44,159 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-01-27 17:56:44,159 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:56:44,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 284 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 165. Up to 10 conditions per place. [2023-01-27 17:56:44,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 142 transitions, 348 flow [2023-01-27 17:56:44,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 233 flow [2023-01-27 17:56:44,160 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:44,160 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 233 flow [2023-01-27 17:56:44,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 233 flow [2023-01-27 17:56:44,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 233 flow [2023-01-27 17:56:44,167 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-01-27 17:56:44,167 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:56:44,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 273 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 10 conditions per place. [2023-01-27 17:56:44,171 INFO L119 LiptonReduction]: Number of co-enabled transitions 4862 [2023-01-27 17:56:45,039 INFO L134 LiptonReduction]: Checked pairs total: 16289 [2023-01-27 17:56:45,039 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-01-27 17:56:45,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:45,040 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;@60c61a93, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:45,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 17:56:45,042 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 17:56:45,042 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:45,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:45,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:56:45,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:56:45,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash 864675117, now seen corresponding path program 1 times [2023-01-27 17:56:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:45,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732103735] [2023-01-27 17:56:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:45,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:45,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732103735] [2023-01-27 17:56:45,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732103735] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:45,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:45,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:45,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427089435] [2023-01-27 17:56:45,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:45,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:56:45,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:45,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:56:45,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:56:45,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 198 [2023-01-27 17:56:45,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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) [2023-01-27 17:56:45,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:45,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 198 [2023-01-27 17:56:45,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:52,130 INFO L130 PetriNetUnfolder]: 106754/138563 cut-off events. [2023-01-27 17:56:52,131 INFO L131 PetriNetUnfolder]: For 22554/22554 co-relation queries the response was YES. [2023-01-27 17:56:52,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282183 conditions, 138563 events. 106754/138563 cut-off events. For 22554/22554 co-relation queries the response was YES. Maximal size of possible extension queue 4782. Compared 886592 event pairs, 31159 based on Foata normal form. 0/135389 useless extension candidates. Maximal degree in co-relation 282170. Up to 91906 conditions per place. [2023-01-27 17:56:53,081 INFO L137 encePairwiseOnDemand]: 180/198 looper letters, 49 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2023-01-27 17:56:53,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 316 flow [2023-01-27 17:56:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:56:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:56:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2023-01-27 17:56:53,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781144781144781 [2023-01-27 17:56:53,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2023-01-27 17:56:53,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2023-01-27 17:56:53,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:53,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2023-01-27 17:56:53,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2023-01-27 17:56:53,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2023-01-27 17:56:53,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2023-01-27 17:56:53,084 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 139 flow. Second operand 3 states and 284 transitions. [2023-01-27 17:56:53,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 316 flow [2023-01-27 17:56:53,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 297 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-01-27 17:56:53,102 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 188 flow [2023-01-27 17:56:53,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2023-01-27 17:56:53,103 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-01-27 17:56:53,104 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 188 flow [2023-01-27 17:56:53,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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) [2023-01-27 17:56:53,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:53,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:53,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 17:56:53,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:56:53,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1743963062, now seen corresponding path program 1 times [2023-01-27 17:56:53,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:53,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56421352] [2023-01-27 17:56:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:53,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:53,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:53,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56421352] [2023-01-27 17:56:53,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56421352] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:53,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:53,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:56:53,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082374444] [2023-01-27 17:56:53,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:53,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:56:53,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:53,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:56:53,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:56:53,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 198 [2023-01-27 17:56:53,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2023-01-27 17:56:53,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:53,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 198 [2023-01-27 17:56:53,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:53,378 INFO L130 PetriNetUnfolder]: 794/2336 cut-off events. [2023-01-27 17:56:53,378 INFO L131 PetriNetUnfolder]: For 503/503 co-relation queries the response was YES. [2023-01-27 17:56:53,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4696 conditions, 2336 events. 794/2336 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17761 event pairs, 99 based on Foata normal form. 1373/3703 useless extension candidates. Maximal degree in co-relation 4680. Up to 881 conditions per place. [2023-01-27 17:56:53,387 INFO L137 encePairwiseOnDemand]: 188/198 looper letters, 15 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2023-01-27 17:56:53,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 244 flow [2023-01-27 17:56:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:56:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:56:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-01-27 17:56:53,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51010101010101 [2023-01-27 17:56:53,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-01-27 17:56:53,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-01-27 17:56:53,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:53,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-01-27 17:56:53,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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) [2023-01-27 17:56:53,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2023-01-27 17:56:53,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2023-01-27 17:56:53,390 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 188 flow. Second operand 3 states and 303 transitions. [2023-01-27 17:56:53,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 244 flow [2023-01-27 17:56:53,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 224 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 17:56:53,395 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 164 flow [2023-01-27 17:56:53,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-01-27 17:56:53,396 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-01-27 17:56:53,396 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 164 flow [2023-01-27 17:56:53,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2023-01-27 17:56:53,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:53,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:53,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 17:56:53,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:56:53,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:53,398 INFO L85 PathProgramCache]: Analyzing trace with hash -945521319, now seen corresponding path program 1 times [2023-01-27 17:56:53,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:53,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615456164] [2023-01-27 17:56:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:53,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615456164] [2023-01-27 17:56:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615456164] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:53,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:53,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:56:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50017444] [2023-01-27 17:56:53,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:53,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:56:53,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:56:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:56:53,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 198 [2023-01-27 17:56:53,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2023-01-27 17:56:53,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:53,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 198 [2023-01-27 17:56:53,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:53,797 INFO L130 PetriNetUnfolder]: 2359/4757 cut-off events. [2023-01-27 17:56:53,797 INFO L131 PetriNetUnfolder]: For 1473/1474 co-relation queries the response was YES. [2023-01-27 17:56:53,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12859 conditions, 4757 events. 2359/4757 cut-off events. For 1473/1474 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 37803 event pairs, 97 based on Foata normal form. 0/4704 useless extension candidates. Maximal degree in co-relation 12844. Up to 3300 conditions per place. [2023-01-27 17:56:53,820 INFO L137 encePairwiseOnDemand]: 184/198 looper letters, 83 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2023-01-27 17:56:53,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 112 transitions, 620 flow [2023-01-27 17:56:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:56:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:56:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2023-01-27 17:56:53,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40824915824915825 [2023-01-27 17:56:53,824 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2023-01-27 17:56:53,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2023-01-27 17:56:53,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:53,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2023-01-27 17:56:53,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 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) [2023-01-27 17:56:53,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 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) [2023-01-27 17:56:53,830 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 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) [2023-01-27 17:56:53,831 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 164 flow. Second operand 6 states and 485 transitions. [2023-01-27 17:56:53,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 112 transitions, 620 flow [2023-01-27 17:56:53,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 112 transitions, 594 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:56:53,837 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 322 flow [2023-01-27 17:56:53,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-01-27 17:56:53,838 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-01-27 17:56:53,838 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 322 flow [2023-01-27 17:56:53,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2023-01-27 17:56:53,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:53,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:53,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 17:56:53,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:56:53,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:53,839 INFO L85 PathProgramCache]: Analyzing trace with hash -580213840, now seen corresponding path program 2 times [2023-01-27 17:56:53,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:53,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248948442] [2023-01-27 17:56:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:53,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:53,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:53,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248948442] [2023-01-27 17:56:53,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248948442] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:56:53,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046914541] [2023-01-27 17:56:53,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 17:56:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:56:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:56:53,922 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) [2023-01-27 17:56:53,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 17:56:54,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 17:56:54,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 17:56:54,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 17:56:54,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:56:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:54,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:56:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:54,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046914541] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:56:54,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:56:54,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-01-27 17:56:54,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576164405] [2023-01-27 17:56:54,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:56:54,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 17:56:54,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:54,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 17:56:54,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-01-27 17:56:54,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 198 [2023-01-27 17:56:54,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 322 flow. Second operand has 20 states, 20 states have (on average 66.85) internal successors, (1337), 20 states have internal predecessors, (1337), 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) [2023-01-27 17:56:54,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:54,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 198 [2023-01-27 17:56:54,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:55,290 INFO L130 PetriNetUnfolder]: 3565/7061 cut-off events. [2023-01-27 17:56:55,291 INFO L131 PetriNetUnfolder]: For 3147/3148 co-relation queries the response was YES. [2023-01-27 17:56:55,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19579 conditions, 7061 events. 3565/7061 cut-off events. For 3147/3148 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60283 event pairs, 61 based on Foata normal form. 40/7100 useless extension candidates. Maximal degree in co-relation 19559. Up to 3390 conditions per place. [2023-01-27 17:56:55,323 INFO L137 encePairwiseOnDemand]: 180/198 looper letters, 111 selfloop transitions, 45 changer transitions 0/164 dead transitions. [2023-01-27 17:56:55,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 164 transitions, 1043 flow [2023-01-27 17:56:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 17:56:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 17:56:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 846 transitions. [2023-01-27 17:56:55,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884297520661157 [2023-01-27 17:56:55,325 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 846 transitions. [2023-01-27 17:56:55,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 846 transitions. [2023-01-27 17:56:55,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:55,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 846 transitions. [2023-01-27 17:56:55,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.9090909090909) internal successors, (846), 11 states have internal predecessors, (846), 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) [2023-01-27 17:56:55,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 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) [2023-01-27 17:56:55,330 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 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) [2023-01-27 17:56:55,330 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 322 flow. Second operand 11 states and 846 transitions. [2023-01-27 17:56:55,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 164 transitions, 1043 flow [2023-01-27 17:56:55,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 164 transitions, 1043 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:56:55,337 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 603 flow [2023-01-27 17:56:55,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=603, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2023-01-27 17:56:55,337 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2023-01-27 17:56:55,337 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 603 flow [2023-01-27 17:56:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.85) internal successors, (1337), 20 states have internal predecessors, (1337), 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) [2023-01-27 17:56:55,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:55,338 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:55,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 17:56:55,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 17:56:55,543 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:56:55,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:55,543 INFO L85 PathProgramCache]: Analyzing trace with hash -988573763, now seen corresponding path program 1 times [2023-01-27 17:56:55,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:55,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284846263] [2023-01-27 17:56:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:55,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:55,555 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:55,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:55,568 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:55,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-01-27 17:56:55,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-01-27 17:56:55,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-01-27 17:56:55,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-01-27 17:56:55,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-01-27 17:56:55,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-01-27 17:56:55,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-01-27 17:56:55,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-27 17:56:55,569 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-01-27 17:56:55,570 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:55,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 17:56:55,595 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:55,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 169 transitions, 428 flow [2023-01-27 17:56:55,606 INFO L130 PetriNetUnfolder]: 19/170 cut-off events. [2023-01-27 17:56:55,607 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 17:56:55,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 197. Up to 12 conditions per place. [2023-01-27 17:56:55,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 169 transitions, 428 flow [2023-01-27 17:56:55,608 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 112 transitions, 272 flow [2023-01-27 17:56:55,608 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:55,608 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 112 transitions, 272 flow [2023-01-27 17:56:55,608 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 112 transitions, 272 flow [2023-01-27 17:56:55,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 112 transitions, 272 flow [2023-01-27 17:56:55,617 INFO L130 PetriNetUnfolder]: 19/170 cut-off events. [2023-01-27 17:56:55,618 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 17:56:55,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 329 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 176. Up to 12 conditions per place. [2023-01-27 17:56:55,622 INFO L119 LiptonReduction]: Number of co-enabled transitions 6760 [2023-01-27 17:56:56,553 INFO L134 LiptonReduction]: Checked pairs total: 23480 [2023-01-27 17:56:56,553 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-01-27 17:56:56,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:56,554 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;@60c61a93, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:56,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-01-27 17:56:56,555 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 17:56:56,555 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:56,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:56,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:56:56,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-01-27 17:56:56,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1109720930, now seen corresponding path program 1 times [2023-01-27 17:56:56,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:56,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724244421] [2023-01-27 17:56:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:56,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:56,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:56,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724244421] [2023-01-27 17:56:56,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724244421] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:56,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:56,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:56,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936999376] [2023-01-27 17:56:56,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:56,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:56:56,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:56,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:56:56,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:56:56,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 230 [2023-01-27 17:56:56,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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) [2023-01-27 17:56:56,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:56,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 230 [2023-01-27 17:56:56,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:52,072 INFO L130 PetriNetUnfolder]: 782236/974548 cut-off events. [2023-01-27 17:57:52,072 INFO L131 PetriNetUnfolder]: For 209942/209942 co-relation queries the response was YES. [2023-01-27 17:57:54,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993817 conditions, 974548 events. 782236/974548 cut-off events. For 209942/209942 co-relation queries the response was YES. Maximal size of possible extension queue 26380. Compared 6508489 event pairs, 242001 based on Foata normal form. 0/955476 useless extension candidates. Maximal degree in co-relation 1993803. Up to 661916 conditions per place. [2023-01-27 17:57:58,779 INFO L137 encePairwiseOnDemand]: 209/230 looper letters, 59 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2023-01-27 17:57:58,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 392 flow [2023-01-27 17:57:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:57:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:57:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-01-27 17:57:58,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753623188405797 [2023-01-27 17:57:58,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-01-27 17:57:58,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-01-27 17:57:58,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:58,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-01-27 17:57:58,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2023-01-27 17:57:58,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-01-27 17:57:58,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-01-27 17:57:58,783 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 170 flow. Second operand 3 states and 328 transitions. [2023-01-27 17:57:58,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 392 flow [2023-01-27 17:57:58,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 359 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-01-27 17:57:58,885 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 225 flow [2023-01-27 17:57:58,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-01-27 17:57:58,885 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-01-27 17:57:58,885 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 225 flow [2023-01-27 17:57:58,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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) [2023-01-27 17:57:58,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:58,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:58,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-27 17:57:58,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-01-27 17:57:58,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:58,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1389580260, now seen corresponding path program 1 times [2023-01-27 17:57:58,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:58,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531300422] [2023-01-27 17:57:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:58,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:58,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:58,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531300422] [2023-01-27 17:57:58,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531300422] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:58,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:58,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:57:58,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005134719] [2023-01-27 17:57:58,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:58,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:57:58,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:58,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:57:58,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:57:58,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 230 [2023-01-27 17:57:58,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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) [2023-01-27 17:57:58,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:58,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 230 [2023-01-27 17:57:58,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:59,169 INFO L130 PetriNetUnfolder]: 1961/5599 cut-off events. [2023-01-27 17:57:59,169 INFO L131 PetriNetUnfolder]: For 1222/1222 co-relation queries the response was YES. [2023-01-27 17:57:59,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11227 conditions, 5599 events. 1961/5599 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 49588 event pairs, 251 based on Foata normal form. 4093/9648 useless extension candidates. Maximal degree in co-relation 11210. Up to 2143 conditions per place. [2023-01-27 17:57:59,190 INFO L137 encePairwiseOnDemand]: 218/230 looper letters, 17 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2023-01-27 17:57:59,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 290 flow [2023-01-27 17:57:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:57:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:57:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-01-27 17:57:59,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115942028985507 [2023-01-27 17:57:59,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-01-27 17:57:59,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-01-27 17:57:59,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:59,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-01-27 17:57:59,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2023-01-27 17:57:59,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-01-27 17:57:59,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-01-27 17:57:59,193 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 225 flow. Second operand 3 states and 353 transitions. [2023-01-27 17:57:59,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 290 flow [2023-01-27 17:57:59,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 266 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-01-27 17:57:59,199 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 195 flow [2023-01-27 17:57:59,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-01-27 17:57:59,199 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-01-27 17:57:59,199 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 195 flow [2023-01-27 17:57:59,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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) [2023-01-27 17:57:59,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:59,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:59,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-27 17:57:59,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-01-27 17:57:59,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash 887309776, now seen corresponding path program 1 times [2023-01-27 17:57:59,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:59,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612128928] [2023-01-27 17:57:59,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:59,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:59,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:59,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612128928] [2023-01-27 17:57:59,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612128928] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:59,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:59,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:57:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904700976] [2023-01-27 17:57:59,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:59,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:57:59,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:57:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:57:59,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 230 [2023-01-27 17:57:59,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 76.6) internal successors, (383), 5 states have internal predecessors, (383), 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) [2023-01-27 17:57:59,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:59,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 230 [2023-01-27 17:57:59,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:58:00,002 INFO L130 PetriNetUnfolder]: 5523/10804 cut-off events. [2023-01-27 17:58:00,002 INFO L131 PetriNetUnfolder]: For 3443/3443 co-relation queries the response was YES. [2023-01-27 17:58:00,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29448 conditions, 10804 events. 5523/10804 cut-off events. For 3443/3443 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 93938 event pairs, 167 based on Foata normal form. 0/10686 useless extension candidates. Maximal degree in co-relation 29432. Up to 8400 conditions per place. [2023-01-27 17:58:00,044 INFO L137 encePairwiseOnDemand]: 213/230 looper letters, 100 selfloop transitions, 26 changer transitions 0/135 dead transitions. [2023-01-27 17:58:00,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 135 transitions, 755 flow [2023-01-27 17:58:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:58:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:58:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 559 transitions. [2023-01-27 17:58:00,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40507246376811595 [2023-01-27 17:58:00,046 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 559 transitions. [2023-01-27 17:58:00,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 559 transitions. [2023-01-27 17:58:00,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:58:00,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 559 transitions. [2023-01-27 17:58:00,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.16666666666667) internal successors, (559), 6 states have internal predecessors, (559), 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) [2023-01-27 17:58:00,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 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) [2023-01-27 17:58:00,049 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 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) [2023-01-27 17:58:00,049 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 195 flow. Second operand 6 states and 559 transitions. [2023-01-27 17:58:00,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 135 transitions, 755 flow [2023-01-27 17:58:00,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 135 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:58:00,055 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 392 flow [2023-01-27 17:58:00,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-01-27 17:58:00,055 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-01-27 17:58:00,055 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 392 flow [2023-01-27 17:58:00,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.6) internal successors, (383), 5 states have internal predecessors, (383), 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) [2023-01-27 17:58:00,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:00,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:58:00,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-27 17:58:00,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-01-27 17:58:00,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash 914423267, now seen corresponding path program 2 times [2023-01-27 17:58:00,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:00,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130899527] [2023-01-27 17:58:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:58:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:58:00,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:58:00,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130899527] [2023-01-27 17:58:00,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130899527] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:58:00,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321297459] [2023-01-27 17:58:00,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 17:58:00,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:58:00,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:58:00,130 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) [2023-01-27 17:58:00,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 17:58:00,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 17:58:00,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 17:58:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 17:58:00,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:58:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:58:00,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:58:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:58:00,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321297459] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:58:00,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:58:00,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-01-27 17:58:00,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056370334] [2023-01-27 17:58:00,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:58:00,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 17:58:00,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:58:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 17:58:00,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-01-27 17:58:00,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 230 [2023-01-27 17:58:00,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 392 flow. Second operand has 20 states, 20 states have (on average 75.85) internal successors, (1517), 20 states have internal predecessors, (1517), 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) [2023-01-27 17:58:00,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:58:00,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 230 [2023-01-27 17:58:00,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:58:01,805 INFO L130 PetriNetUnfolder]: 8073/15566 cut-off events. [2023-01-27 17:58:01,805 INFO L131 PetriNetUnfolder]: For 7197/7197 co-relation queries the response was YES. [2023-01-27 17:58:01,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43392 conditions, 15566 events. 8073/15566 cut-off events. For 7197/7197 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 144723 event pairs, 89 based on Foata normal form. 70/15632 useless extension candidates. Maximal degree in co-relation 43371. Up to 8670 conditions per place. [2023-01-27 17:58:01,879 INFO L137 encePairwiseOnDemand]: 208/230 looper letters, 134 selfloop transitions, 56 changer transitions 0/199 dead transitions. [2023-01-27 17:58:01,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 199 transitions, 1285 flow [2023-01-27 17:58:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 17:58:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 17:58:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 976 transitions. [2023-01-27 17:58:01,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3857707509881423 [2023-01-27 17:58:01,881 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 976 transitions. [2023-01-27 17:58:01,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 976 transitions. [2023-01-27 17:58:01,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:58:01,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 976 transitions. [2023-01-27 17:58:01,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 88.72727272727273) internal successors, (976), 11 states have internal predecessors, (976), 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) [2023-01-27 17:58:01,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 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) [2023-01-27 17:58:01,886 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 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) [2023-01-27 17:58:01,886 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 392 flow. Second operand 11 states and 976 transitions. [2023-01-27 17:58:01,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 199 transitions, 1285 flow [2023-01-27 17:58:01,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 199 transitions, 1285 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:58:01,900 INFO L231 Difference]: Finished difference. Result has 85 places, 113 transitions, 742 flow [2023-01-27 17:58:01,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=742, PETRI_PLACES=85, PETRI_TRANSITIONS=113} [2023-01-27 17:58:01,900 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 17 predicate places. [2023-01-27 17:58:01,900 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 113 transitions, 742 flow [2023-01-27 17:58:01,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 75.85) internal successors, (1517), 20 states have internal predecessors, (1517), 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) [2023-01-27 17:58:01,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:01,901 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:58:01,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 17:58:02,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 17:58:02,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-01-27 17:58:02,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1785057498, now seen corresponding path program 1 times [2023-01-27 17:58:02,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:02,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128247297] [2023-01-27 17:58:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:02,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:58:02,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:58:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:58:02,127 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:58:02,127 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:58:02,127 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-01-27 17:58:02,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-01-27 17:58:02,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2023-01-27 17:58:02,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-01-27 17:58:02,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-01-27 17:58:02,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-01-27 17:58:02,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-01-27 17:58:02,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-01-27 17:58:02,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-01-27 17:58:02,128 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-01-27 17:58:02,129 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:58:02,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-01-27 17:58:02,151 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:58:02,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 196 transitions, 512 flow [2023-01-27 17:58:02,163 INFO L130 PetriNetUnfolder]: 22/195 cut-off events. [2023-01-27 17:58:02,163 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-27 17:58:02,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 195 events. 22/195 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 384 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 230. Up to 14 conditions per place. [2023-01-27 17:58:02,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 196 transitions, 512 flow [2023-01-27 17:58:02,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 125 transitions, 313 flow [2023-01-27 17:58:02,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:58:02,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 125 transitions, 313 flow [2023-01-27 17:58:02,165 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 125 transitions, 313 flow [2023-01-27 17:58:02,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 125 transitions, 313 flow [2023-01-27 17:58:02,174 INFO L130 PetriNetUnfolder]: 22/195 cut-off events. [2023-01-27 17:58:02,174 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-27 17:58:02,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 195 events. 22/195 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 383 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 209. Up to 14 conditions per place. [2023-01-27 17:58:02,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 8970 [2023-01-27 17:58:03,081 INFO L134 LiptonReduction]: Checked pairs total: 31391 [2023-01-27 17:58:03,081 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-01-27 17:58:03,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:58:03,082 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;@60c61a93, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:58:03,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-01-27 17:58:03,083 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 17:58:03,083 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:58:03,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:03,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:58:03,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-01-27 17:58:03,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:03,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1385291915, now seen corresponding path program 1 times [2023-01-27 17:58:03,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:03,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020467710] [2023-01-27 17:58:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:03,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:58:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:58:03,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:58:03,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020467710] [2023-01-27 17:58:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020467710] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:58:03,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:58:03,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:58:03,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537575178] [2023-01-27 17:58:03,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:58:03,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:58:03,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:58:03,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:58:03,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:58:03,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 262 [2023-01-27 17:58:03,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2023-01-27 17:58:03,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:58:03,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 262 [2023-01-27 17:58:03,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand