/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/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:21:06,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:21:06,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:21:06,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:21:06,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:21:06,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:21:06,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:21:06,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:21:06,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:21:06,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:21:06,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:21:06,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:21:06,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:21:06,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:21:06,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:21:06,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:21:06,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:21:06,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:21:06,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:21:06,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:21:06,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:21:06,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:21:06,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:21:06,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:21:06,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:21:06,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:21:06,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:21:06,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:21:06,918 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 19:21:06,947 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:21:06,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:21:06,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:21:06,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:21:06,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:21:06,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:21:06,950 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:21:06,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:21:06,950 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:21:06,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:21:06,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:21:06,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:21:06,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:21:06,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:21:06,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:21:06,951 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:21:06,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:21:06,951 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:21:06,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:21:06,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:21:06,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:21:06,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:21:06,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:21:06,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:21:06,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:21:06,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:21:06,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:21:06,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:21:06,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:21:06,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:21:06,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:21:06,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:21:07,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:21:07,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:21:07,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:21:07,196 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:21:07,196 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:21:07,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-01-27 19:21:08,575 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:21:08,776 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:21:08,776 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-01-27 19:21:08,792 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fca2ebd9/fa100ebc6e0f4964bec33a14a8b7e3bb/FLAG7d0aba7c4 [2023-01-27 19:21:08,809 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fca2ebd9/fa100ebc6e0f4964bec33a14a8b7e3bb [2023-01-27 19:21:08,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:21:08,813 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:21:08,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:21:08,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:21:08,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:21:08,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:21:08" (1/1) ... [2023-01-27 19:21:08,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77654edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:08, skipping insertion in model container [2023-01-27 19:21:08,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:21:08" (1/1) ... [2023-01-27 19:21:08,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:21:08,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:21:09,325 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-01-27 19:21:09,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:21:09,387 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:21:09,425 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-01-27 19:21:09,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:21:09,506 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:21:09,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09 WrapperNode [2023-01-27 19:21:09,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:21:09,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:21:09,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:21:09,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:21:09,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,554 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 190 [2023-01-27 19:21:09,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:21:09,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:21:09,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:21:09,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:21:09,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,580 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:21:09,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:21:09,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:21:09,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:21:09,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (1/1) ... [2023-01-27 19:21:09,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:21:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:09,624 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 19:21:09,637 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 19:21:09,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:21:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:21:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:21:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:21:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:21:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:21:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:21:09,665 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:21:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:21:09,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:21:09,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:21:09,668 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 19:21:09,866 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:21:09,868 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:21:10,211 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:21:10,222 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:21:10,222 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-01-27 19:21:10,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:21:10 BoogieIcfgContainer [2023-01-27 19:21:10,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:21:10,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:21:10,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:21:10,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:21:10,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:21:08" (1/3) ... [2023-01-27 19:21:10,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f57d0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:21:10, skipping insertion in model container [2023-01-27 19:21:10,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:21:09" (2/3) ... [2023-01-27 19:21:10,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f57d0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:21:10, skipping insertion in model container [2023-01-27 19:21:10,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:21:10" (3/3) ... [2023-01-27 19:21:10,231 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-01-27 19:21:10,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:21:10,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 19:21:10,247 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:21:10,303 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:21:10,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 388 flow [2023-01-27 19:21:10,404 INFO L130 PetriNetUnfolder]: 45/260 cut-off events. [2023-01-27 19:21:10,404 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-01-27 19:21:10,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 260 events. 45/260 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 817 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-01-27 19:21:10,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 388 flow [2023-01-27 19:21:10,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 185 transitions, 375 flow [2023-01-27 19:21:10,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:21:10,438 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 185 transitions, 375 flow [2023-01-27 19:21:10,446 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 185 transitions, 375 flow [2023-01-27 19:21:10,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 185 transitions, 375 flow [2023-01-27 19:21:10,523 INFO L130 PetriNetUnfolder]: 44/255 cut-off events. [2023-01-27 19:21:10,523 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:21:10,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 255 events. 44/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 776 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-01-27 19:21:10,532 INFO L119 LiptonReduction]: Number of co-enabled transitions 10336 [2023-01-27 19:21:13,124 INFO L134 LiptonReduction]: Checked pairs total: 15158 [2023-01-27 19:21:13,124 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-01-27 19:21:13,137 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:21:13,143 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;@21346244, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:21:13,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 19:21:13,148 INFO L130 PetriNetUnfolder]: 5/27 cut-off events. [2023-01-27 19:21:13,149 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:21:13,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:13,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:21:13,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:21:13,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:13,154 INFO L85 PathProgramCache]: Analyzing trace with hash 826457834, now seen corresponding path program 1 times [2023-01-27 19:21:13,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:13,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085442360] [2023-01-27 19:21:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:13,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:13,442 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 19:21:13,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085442360] [2023-01-27 19:21:13,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085442360] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:21:13,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:21:13,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:21:13,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558021247] [2023-01-27 19:21:13,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:21:13,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:21:13,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:21:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:21:13,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-27 19:21:13,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 65 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 19:21:13,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:13,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-27 19:21:13,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:13,621 INFO L130 PetriNetUnfolder]: 301/651 cut-off events. [2023-01-27 19:21:13,621 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:21:13,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 651 events. 301/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3189 event pairs, 266 based on Foata normal form. 107/643 useless extension candidates. Maximal degree in co-relation 1189. Up to 588 conditions per place. [2023-01-27 19:21:13,625 INFO L137 encePairwiseOnDemand]: 318/341 looper letters, 36 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-01-27 19:21:13,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 173 flow [2023-01-27 19:21:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:21:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:21:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-01-27 19:21:13,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034213098729228 [2023-01-27 19:21:13,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-01-27 19:21:13,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-01-27 19:21:13,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:13,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-01-27 19:21:13,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 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 19:21:13,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 19:21:13,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 19:21:13,653 INFO L175 Difference]: Start difference. First operand has 45 places, 65 transitions, 135 flow. Second operand 3 states and 515 transitions. [2023-01-27 19:21:13,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 173 flow [2023-01-27 19:21:13,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:21:13,658 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 107 flow [2023-01-27 19:21:13,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-01-27 19:21:13,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-01-27 19:21:13,662 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 107 flow [2023-01-27 19:21:13,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 19:21:13,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:13,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:21:13,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:21:13,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:21:13,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash -669135341, now seen corresponding path program 1 times [2023-01-27 19:21:13,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:13,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721232658] [2023-01-27 19:21:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:13,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721232658] [2023-01-27 19:21:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721232658] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785059622] [2023-01-27 19:21:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:13,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:13,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:13,737 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 19:21:13,771 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 19:21:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:13,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:21:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:21:13,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:21:13,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785059622] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:21:13,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:21:13,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:21:13,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603570430] [2023-01-27 19:21:13,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:21:13,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:21:13,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:13,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:21:13,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:21:13,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-27 19:21:13,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 19:21:13,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:13,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-27 19:21:13,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:14,030 INFO L130 PetriNetUnfolder]: 283/635 cut-off events. [2023-01-27 19:21:14,030 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:21:14,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 635 events. 283/635 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3546 event pairs, 0 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1221. Up to 555 conditions per place. [2023-01-27 19:21:14,033 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 51 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-01-27 19:21:14,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 243 flow [2023-01-27 19:21:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:21:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:21:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-01-27 19:21:14,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975562072336266 [2023-01-27 19:21:14,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-01-27 19:21:14,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-01-27 19:21:14,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:14,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-01-27 19:21:14,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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 19:21:14,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 19:21:14,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 19:21:14,040 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 107 flow. Second operand 3 states and 509 transitions. [2023-01-27 19:21:14,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 243 flow [2023-01-27 19:21:14,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 239 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:21:14,042 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 111 flow [2023-01-27 19:21:14,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-01-27 19:21:14,043 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-01-27 19:21:14,043 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 111 flow [2023-01-27 19:21:14,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 19:21:14,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:14,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-27 19:21:14,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 19:21:14,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:14,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:21:14,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash 716448256, now seen corresponding path program 1 times [2023-01-27 19:21:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:14,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768221746] [2023-01-27 19:21:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:21:14,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:14,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768221746] [2023-01-27 19:21:14,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768221746] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:14,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641307605] [2023-01-27 19:21:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:14,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:14,315 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 19:21:14,316 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 19:21:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:14,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:21:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:21:14,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:21:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:21:14,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641307605] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:21:14,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:21:14,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:21:14,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201364216] [2023-01-27 19:21:14,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:21:14,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:21:14,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:14,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:21:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:21:14,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-27 19:21:14,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 111 flow. Second operand has 7 states, 7 states have (on average 153.57142857142858) internal successors, (1075), 7 states have internal predecessors, (1075), 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 19:21:14,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:14,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-27 19:21:14,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:14,565 INFO L130 PetriNetUnfolder]: 301/637 cut-off events. [2023-01-27 19:21:14,566 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-01-27 19:21:14,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 637 events. 301/637 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3076 event pairs, 266 based on Foata normal form. 3/547 useless extension candidates. Maximal degree in co-relation 1245. Up to 571 conditions per place. [2023-01-27 19:21:14,568 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 36 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-01-27 19:21:14,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 205 flow [2023-01-27 19:21:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:21:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:21:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 956 transitions. [2023-01-27 19:21:14,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46725317693059626 [2023-01-27 19:21:14,571 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 956 transitions. [2023-01-27 19:21:14,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 956 transitions. [2023-01-27 19:21:14,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:14,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 956 transitions. [2023-01-27 19:21:14,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.33333333333334) internal successors, (956), 6 states have internal predecessors, (956), 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 19:21:14,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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 19:21:14,579 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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 19:21:14,579 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 111 flow. Second operand 6 states and 956 transitions. [2023-01-27 19:21:14,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 205 flow [2023-01-27 19:21:14,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 19:21:14,581 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 143 flow [2023-01-27 19:21:14,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=143, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-01-27 19:21:14,583 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2023-01-27 19:21:14,583 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 143 flow [2023-01-27 19:21:14,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.57142857142858) internal successors, (1075), 7 states have internal predecessors, (1075), 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 19:21:14,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:14,584 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-27 19:21:14,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 19:21:14,789 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,SelfDestructingSolverStorable2 [2023-01-27 19:21:14,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:21:14,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1278120393, now seen corresponding path program 2 times [2023-01-27 19:21:14,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:14,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586681107] [2023-01-27 19:21:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:14,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:21:14,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:14,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586681107] [2023-01-27 19:21:14,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586681107] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:14,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734829007] [2023-01-27 19:21:14,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:21:14,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:14,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:14,902 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:21:14,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:21:14,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:21:14,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:21:14,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:21:14,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:21:15,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:21:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:21:15,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734829007] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:21:15,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:21:15,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:21:15,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763815821] [2023-01-27 19:21:15,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:21:15,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:21:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:15,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:21:15,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:21:15,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-27 19:21:15,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 143 flow. Second operand has 13 states, 13 states have (on average 153.30769230769232) internal successors, (1993), 13 states have internal predecessors, (1993), 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 19:21:15,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:15,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-27 19:21:15,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:15,205 INFO L130 PetriNetUnfolder]: 301/643 cut-off events. [2023-01-27 19:21:15,205 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-01-27 19:21:15,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 643 events. 301/643 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3080 event pairs, 266 based on Foata normal form. 6/556 useless extension candidates. Maximal degree in co-relation 1236. Up to 571 conditions per place. [2023-01-27 19:21:15,207 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 36 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2023-01-27 19:21:15,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 273 flow [2023-01-27 19:21:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:21:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:21:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1877 transitions. [2023-01-27 19:21:15,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586999022482893 [2023-01-27 19:21:15,212 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1877 transitions. [2023-01-27 19:21:15,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1877 transitions. [2023-01-27 19:21:15,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:15,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1877 transitions. [2023-01-27 19:21:15,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 156.41666666666666) internal successors, (1877), 12 states have internal predecessors, (1877), 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 19:21:15,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 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 19:21:15,224 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 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 19:21:15,225 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 143 flow. Second operand 12 states and 1877 transitions. [2023-01-27 19:21:15,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 273 flow [2023-01-27 19:21:15,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 259 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:21:15,229 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 213 flow [2023-01-27 19:21:15,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-01-27 19:21:15,230 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2023-01-27 19:21:15,230 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 213 flow [2023-01-27 19:21:15,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 153.30769230769232) internal successors, (1993), 13 states have internal predecessors, (1993), 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 19:21:15,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:15,232 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-27 19:21:15,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 19:21:15,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:15,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:21:15,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash 766826089, now seen corresponding path program 3 times [2023-01-27 19:21:15,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:15,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901333924] [2023-01-27 19:21:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:15,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:21:15,473 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:21:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:21:15,515 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:21:15,515 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:21:15,516 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 19:21:15,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 19:21:15,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 19:21:15,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 19:21:15,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:21:15,518 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-01-27 19:21:15,520 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:21:15,520 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:21:15,573 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:21:15,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-01-27 19:21:15,621 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-01-27 19:21:15,621 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-27 19:21:15,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-01-27 19:21:15,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 260 transitions, 538 flow [2023-01-27 19:21:15,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 260 transitions, 538 flow [2023-01-27 19:21:15,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:21:15,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 260 transitions, 538 flow [2023-01-27 19:21:15,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 260 transitions, 538 flow [2023-01-27 19:21:15,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-01-27 19:21:15,669 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-01-27 19:21:15,669 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-27 19:21:15,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-01-27 19:21:15,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 31416 [2023-01-27 19:21:18,703 INFO L134 LiptonReduction]: Checked pairs total: 55124 [2023-01-27 19:21:18,703 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-01-27 19:21:18,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:21:18,705 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;@21346244, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:21:18,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:21:18,708 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:21:18,708 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:21:18,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:18,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:21:18,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:21:18,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:18,709 INFO L85 PathProgramCache]: Analyzing trace with hash -236515349, now seen corresponding path program 1 times [2023-01-27 19:21:18,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:18,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048764989] [2023-01-27 19:21:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:18,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:18,735 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 19:21:18,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:18,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048764989] [2023-01-27 19:21:18,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048764989] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:21:18,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:21:18,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:21:18,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746467458] [2023-01-27 19:21:18,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:21:18,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:21:18,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:21:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:21:18,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-27 19:21:18,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 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 19:21:18,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:18,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-27 19:21:18,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:20,030 INFO L130 PetriNetUnfolder]: 9872/15757 cut-off events. [2023-01-27 19:21:20,030 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-01-27 19:21:20,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30205 conditions, 15757 events. 9872/15757 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 104377 event pairs, 9112 based on Foata normal form. 2730/16056 useless extension candidates. Maximal degree in co-relation 12164. Up to 14349 conditions per place. [2023-01-27 19:21:20,114 INFO L137 encePairwiseOnDemand]: 444/478 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-01-27 19:21:20,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 272 flow [2023-01-27 19:21:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:21:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:21:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-01-27 19:21:20,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49511854951185497 [2023-01-27 19:21:20,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-01-27 19:21:20,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-01-27 19:21:20,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:20,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-01-27 19:21:20,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 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 19:21:20,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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 19:21:20,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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 19:21:20,123 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 710 transitions. [2023-01-27 19:21:20,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 272 flow [2023-01-27 19:21:20,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:21:20,126 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2023-01-27 19:21:20,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-01-27 19:21:20,129 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-27 19:21:20,129 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2023-01-27 19:21:20,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 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 19:21:20,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:20,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:21:20,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:21:20,130 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:21:20,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:20,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1035577073, now seen corresponding path program 1 times [2023-01-27 19:21:20,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:20,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405089891] [2023-01-27 19:21:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:20,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:20,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:20,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405089891] [2023-01-27 19:21:20,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405089891] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:20,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545279688] [2023-01-27 19:21:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:20,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:20,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:21:20,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 19:21:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:21:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:21:20,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:21:20,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545279688] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:21:20,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:21:20,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:21:20,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460030278] [2023-01-27 19:21:20,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:21:20,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:21:20,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:21:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:21:20,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-27 19:21:20,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 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 19:21:20,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:20,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-27 19:21:20,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:21,540 INFO L130 PetriNetUnfolder]: 9675/15570 cut-off events. [2023-01-27 19:21:21,540 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-27 19:21:21,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30030 conditions, 15570 events. 9675/15570 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 105521 event pairs, 4312 based on Foata normal form. 0/13126 useless extension candidates. Maximal degree in co-relation 30017. Up to 14317 conditions per place. [2023-01-27 19:21:21,630 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 72 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-01-27 19:21:21,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 350 flow [2023-01-27 19:21:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:21:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:21:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-01-27 19:21:21,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48465829846582986 [2023-01-27 19:21:21,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-01-27 19:21:21,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-01-27 19:21:21,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:21,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-01-27 19:21:21,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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 19:21:21,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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 19:21:21,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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 19:21:21,640 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 695 transitions. [2023-01-27 19:21:21,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 350 flow [2023-01-27 19:21:21,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 346 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:21:21,646 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2023-01-27 19:21:21,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-01-27 19:21:21,647 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-01-27 19:21:21,648 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2023-01-27 19:21:21,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 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 19:21:21,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:21,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:21:21,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 19:21:21,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:21,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:21:21,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1764494610, now seen corresponding path program 1 times [2023-01-27 19:21:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:21,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572956861] [2023-01-27 19:21:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:21,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:21,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:21,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572956861] [2023-01-27 19:21:21,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572956861] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:21,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408597798] [2023-01-27 19:21:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:21,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:21,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:21,908 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:21:21,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 19:21:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:21,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:21:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:21,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:21:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:22,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408597798] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:21:22,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:21:22,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:21:22,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605871712] [2023-01-27 19:21:22,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:21:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:21:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:21:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:21:22,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-27 19:21:22,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 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 19:21:22,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:22,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-27 19:21:22,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:23,246 INFO L130 PetriNetUnfolder]: 9912/15619 cut-off events. [2023-01-27 19:21:23,246 INFO L131 PetriNetUnfolder]: For 612/612 co-relation queries the response was YES. [2023-01-27 19:21:23,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30593 conditions, 15619 events. 9912/15619 cut-off events. For 612/612 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 101707 event pairs, 9112 based on Foata normal form. 3/13422 useless extension candidates. Maximal degree in co-relation 30565. Up to 14334 conditions per place. [2023-01-27 19:21:23,317 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 56 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-01-27 19:21:23,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 310 flow [2023-01-27 19:21:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:21:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:21:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1305 transitions. [2023-01-27 19:21:23,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45502092050209203 [2023-01-27 19:21:23,321 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1305 transitions. [2023-01-27 19:21:23,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1305 transitions. [2023-01-27 19:21:23,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:23,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1305 transitions. [2023-01-27 19:21:23,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.5) internal successors, (1305), 6 states have internal predecessors, (1305), 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 19:21:23,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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 19:21:23,330 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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 19:21:23,330 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1305 transitions. [2023-01-27 19:21:23,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 310 flow [2023-01-27 19:21:23,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:21:23,333 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2023-01-27 19:21:23,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-01-27 19:21:23,334 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-01-27 19:21:23,334 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2023-01-27 19:21:23,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 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 19:21:23,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:23,335 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:21:23,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-27 19:21:23,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:23,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:21:23,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2032322840, now seen corresponding path program 2 times [2023-01-27 19:21:23,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:23,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475833444] [2023-01-27 19:21:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:23,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:23,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475833444] [2023-01-27 19:21:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475833444] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:23,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379156523] [2023-01-27 19:21:23,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:21:23,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:23,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:23,647 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:21:23,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 19:21:23,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:21:23,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:21:23,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 19:21:23,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:23,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:21:23,826 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:21:23,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:21:23,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 19:21:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:21:23,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:21:23,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379156523] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:21:23,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:21:23,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-27 19:21:23,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601501321] [2023-01-27 19:21:23,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:21:23,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:21:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:21:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:21:23,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 478 [2023-01-27 19:21:23,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 173.5) internal successors, (1041), 6 states have internal predecessors, (1041), 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 19:21:23,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:23,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 478 [2023-01-27 19:21:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:25,404 INFO L130 PetriNetUnfolder]: 10465/17002 cut-off events. [2023-01-27 19:21:25,404 INFO L131 PetriNetUnfolder]: For 588/588 co-relation queries the response was YES. [2023-01-27 19:21:25,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33425 conditions, 17002 events. 10465/17002 cut-off events. For 588/588 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 118837 event pairs, 2255 based on Foata normal form. 0/15020 useless extension candidates. Maximal degree in co-relation 33389. Up to 12366 conditions per place. [2023-01-27 19:21:25,469 INFO L137 encePairwiseOnDemand]: 468/478 looper letters, 125 selfloop transitions, 14 changer transitions 14/165 dead transitions. [2023-01-27 19:21:25,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 165 transitions, 729 flow [2023-01-27 19:21:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:21:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:21:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1186 transitions. [2023-01-27 19:21:25,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41352859135285913 [2023-01-27 19:21:25,474 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1186 transitions. [2023-01-27 19:21:25,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1186 transitions. [2023-01-27 19:21:25,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:25,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1186 transitions. [2023-01-27 19:21:25,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 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 19:21:25,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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 19:21:25,481 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 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 19:21:25,481 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1186 transitions. [2023-01-27 19:21:25,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 165 transitions, 729 flow [2023-01-27 19:21:25,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 165 transitions, 715 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:21:25,486 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 293 flow [2023-01-27 19:21:25,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-01-27 19:21:25,487 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2023-01-27 19:21:25,488 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 293 flow [2023-01-27 19:21:25,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 173.5) internal successors, (1041), 6 states have internal predecessors, (1041), 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 19:21:25,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:25,489 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-27 19:21:25,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 19:21:25,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:25,695 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:21:25,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:25,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1964701426, now seen corresponding path program 1 times [2023-01-27 19:21:25,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:25,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373314231] [2023-01-27 19:21:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:25,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 19:21:25,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:25,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373314231] [2023-01-27 19:21:25,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373314231] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:25,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955131403] [2023-01-27 19:21:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:25,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:25,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:25,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:21:25,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 19:21:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:25,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:21:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 19:21:25,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:21:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 19:21:25,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955131403] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:21:25,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:21:25,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:21:25,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425777189] [2023-01-27 19:21:25,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:21:25,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:21:25,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:25,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:21:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:21:25,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-27 19:21:25,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 293 flow. Second operand has 13 states, 13 states have (on average 208.3846153846154) internal successors, (2709), 13 states have internal predecessors, (2709), 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 19:21:25,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:25,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-27 19:21:25,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:26,996 INFO L130 PetriNetUnfolder]: 9981/16201 cut-off events. [2023-01-27 19:21:26,997 INFO L131 PetriNetUnfolder]: For 5415/5420 co-relation queries the response was YES. [2023-01-27 19:21:27,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35774 conditions, 16201 events. 9981/16201 cut-off events. For 5415/5420 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 111456 event pairs, 8766 based on Foata normal form. 6/15176 useless extension candidates. Maximal degree in co-relation 35715. Up to 15056 conditions per place. [2023-01-27 19:21:27,074 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 68 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-01-27 19:21:27,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 92 transitions, 487 flow [2023-01-27 19:21:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:21:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:21:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2556 transitions. [2023-01-27 19:21:27,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456066945606695 [2023-01-27 19:21:27,081 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2556 transitions. [2023-01-27 19:21:27,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2556 transitions. [2023-01-27 19:21:27,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:27,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2556 transitions. [2023-01-27 19:21:27,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.0) internal successors, (2556), 12 states have internal predecessors, (2556), 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 19:21:27,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 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 19:21:27,094 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 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 19:21:27,094 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 293 flow. Second operand 12 states and 2556 transitions. [2023-01-27 19:21:27,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 92 transitions, 487 flow [2023-01-27 19:21:27,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 92 transitions, 487 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:21:27,114 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 377 flow [2023-01-27 19:21:27,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=377, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2023-01-27 19:21:27,114 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2023-01-27 19:21:27,114 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 377 flow [2023-01-27 19:21:27,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 208.3846153846154) internal successors, (2709), 13 states have internal predecessors, (2709), 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 19:21:27,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:27,116 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-27 19:21:27,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 19:21:27,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:27,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:21:27,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:27,322 INFO L85 PathProgramCache]: Analyzing trace with hash -193054414, now seen corresponding path program 2 times [2023-01-27 19:21:27,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:27,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574769084] [2023-01-27 19:21:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:27,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:21:27,347 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:21:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:21:27,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:21:27,373 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:21:27,373 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:21:27,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:21:27,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:21:27,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:21:27,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:21:27,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:21:27,374 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-01-27 19:21:27,375 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:21:27,375 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:21:27,417 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:21:27,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-01-27 19:21:27,485 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-01-27 19:21:27,485 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-27 19:21:27,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-01-27 19:21:27,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 330 transitions, 690 flow [2023-01-27 19:21:27,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 330 transitions, 690 flow [2023-01-27 19:21:27,499 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:21:27,499 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 330 transitions, 690 flow [2023-01-27 19:21:27,499 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 330 transitions, 690 flow [2023-01-27 19:21:27,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-01-27 19:21:27,564 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-01-27 19:21:27,565 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-27 19:21:27,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-01-27 19:21:27,599 INFO L119 LiptonReduction]: Number of co-enabled transitions 61608 [2023-01-27 19:21:31,173 INFO L134 LiptonReduction]: Checked pairs total: 109900 [2023-01-27 19:21:31,174 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-01-27 19:21:31,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:21:31,176 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;@21346244, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:21:31,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 19:21:31,178 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:21:31,178 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:21:31,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:31,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:21:31,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:21:31,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:31,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1824107009, now seen corresponding path program 1 times [2023-01-27 19:21:31,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:31,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976390317] [2023-01-27 19:21:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:31,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:31,199 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 19:21:31,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976390317] [2023-01-27 19:21:31,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976390317] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:21:31,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:21:31,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:21:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706912986] [2023-01-27 19:21:31,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:21:31,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:21:31,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:21:31,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:21:31,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-27 19:21:31,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 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 19:21:31,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:31,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-27 19:21:31,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:52,688 INFO L130 PetriNetUnfolder]: 252661/348965 cut-off events. [2023-01-27 19:21:52,689 INFO L131 PetriNetUnfolder]: For 3589/3589 co-relation queries the response was YES. [2023-01-27 19:21:53,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681977 conditions, 348965 events. 252661/348965 cut-off events. For 3589/3589 co-relation queries the response was YES. Maximal size of possible extension queue 8440. Compared 2625001 event pairs, 240676 based on Foata normal form. 57687/354412 useless extension candidates. Maximal degree in co-relation 94389. Up to 330814 conditions per place. [2023-01-27 19:21:54,537 INFO L137 encePairwiseOnDemand]: 556/601 looper letters, 73 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-01-27 19:21:54,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 360 flow [2023-01-27 19:21:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:21:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:21:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-01-27 19:21:54,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013865779256794 [2023-01-27 19:21:54,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-01-27 19:21:54,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-01-27 19:21:54,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:54,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-01-27 19:21:54,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 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 19:21:54,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 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 19:21:54,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 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 19:21:54,552 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 904 transitions. [2023-01-27 19:21:54,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 360 flow [2023-01-27 19:21:54,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:21:54,556 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2023-01-27 19:21:54,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-01-27 19:21:54,556 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-01-27 19:21:54,557 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2023-01-27 19:21:54,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 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 19:21:54,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:54,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:21:54,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 19:21:54,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:21:54,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1665319817, now seen corresponding path program 1 times [2023-01-27 19:21:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320025676] [2023-01-27 19:21:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:54,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:54,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:54,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320025676] [2023-01-27 19:21:54,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320025676] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:54,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305220824] [2023-01-27 19:21:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:54,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:54,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:54,591 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:21:54,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 19:21:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:54,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:21:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:21:54,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:21:54,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305220824] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:21:54,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:21:54,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:21:54,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262748987] [2023-01-27 19:21:54,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:21:54,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:21:54,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:21:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:21:54,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-27 19:21:54,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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 19:21:54,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:54,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-27 19:21:54,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:14,117 INFO L130 PetriNetUnfolder]: 252584/348596 cut-off events. [2023-01-27 19:22:14,118 INFO L131 PetriNetUnfolder]: For 3555/3555 co-relation queries the response was YES. [2023-01-27 19:22:14,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681684 conditions, 348596 events. 252584/348596 cut-off events. For 3555/3555 co-relation queries the response was YES. Maximal size of possible extension queue 8385. Compared 2617918 event pairs, 157576 based on Foata normal form. 0/296520 useless extension candidates. Maximal degree in co-relation 681670. Up to 330782 conditions per place. [2023-01-27 19:22:15,633 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 90 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-01-27 19:22:15,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 107 transitions, 438 flow [2023-01-27 19:22:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:22:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:22:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 878 transitions. [2023-01-27 19:22:15,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48696616749861343 [2023-01-27 19:22:15,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 878 transitions. [2023-01-27 19:22:15,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 878 transitions. [2023-01-27 19:22:15,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:15,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 878 transitions. [2023-01-27 19:22:15,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 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 19:22:15,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 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 19:22:15,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 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 19:22:15,641 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 878 transitions. [2023-01-27 19:22:15,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 107 transitions, 438 flow [2023-01-27 19:22:15,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 107 transitions, 434 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:15,645 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2023-01-27 19:22:15,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-01-27 19:22:15,646 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-01-27 19:22:15,646 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2023-01-27 19:22:15,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 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 19:22:15,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:15,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:15,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 19:22:15,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 19:22:15,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:22:15,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1036252775, now seen corresponding path program 1 times [2023-01-27 19:22:15,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:15,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399793993] [2023-01-27 19:22:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:15,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:15,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:15,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399793993] [2023-01-27 19:22:15,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399793993] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862169293] [2023-01-27 19:22:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:15,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:15,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:15,896 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:22:15,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 19:22:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:15,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:22:15,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:15,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:22:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862169293] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:22:16,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:22:16,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:22:16,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432093672] [2023-01-27 19:22:16,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:22:16,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:22:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:16,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:22:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:22:16,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-27 19:22:16,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 264.0) internal successors, (1848), 7 states have internal predecessors, (1848), 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 19:22:16,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:16,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-27 19:22:16,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:36,673 INFO L130 PetriNetUnfolder]: 254329/349484 cut-off events. [2023-01-27 19:22:36,673 INFO L131 PetriNetUnfolder]: For 12214/12214 co-relation queries the response was YES. [2023-01-27 19:22:37,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691246 conditions, 349484 events. 254329/349484 cut-off events. For 12214/12214 co-relation queries the response was YES. Maximal size of possible extension queue 8368. Compared 2596657 event pairs, 240676 based on Foata normal form. 3/301654 useless extension candidates. Maximal degree in co-relation 691217. Up to 330799 conditions per place. [2023-01-27 19:22:38,179 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 74 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-01-27 19:22:38,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 398 flow [2023-01-27 19:22:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:22:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:22:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1653 transitions. [2023-01-27 19:22:38,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584026622296173 [2023-01-27 19:22:38,184 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1653 transitions. [2023-01-27 19:22:38,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1653 transitions. [2023-01-27 19:22:38,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:38,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1653 transitions. [2023-01-27 19:22:38,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 275.5) internal successors, (1653), 6 states have internal predecessors, (1653), 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 19:22:38,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 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 19:22:38,193 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 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 19:22:38,193 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1653 transitions. [2023-01-27 19:22:38,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 398 flow [2023-01-27 19:22:38,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:38,207 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2023-01-27 19:22:38,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-01-27 19:22:38,208 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-01-27 19:22:38,208 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2023-01-27 19:22:38,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 264.0) internal successors, (1848), 7 states have internal predecessors, (1848), 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 19:22:38,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:38,209 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:38,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 19:22:38,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 19:22:38,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:22:38,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:38,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1731144687, now seen corresponding path program 2 times [2023-01-27 19:22:38,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:38,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211776214] [2023-01-27 19:22:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:38,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:38,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:38,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211776214] [2023-01-27 19:22:38,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211776214] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:38,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154092265] [2023-01-27 19:22:38,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:22:38,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:38,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:38,492 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:22:38,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 19:22:38,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:22:38,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:22:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 19:22:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:38,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:22:38,641 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:22:38,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:22:38,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 19:22:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:22:38,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:22:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154092265] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:22:38,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:22:38,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-27 19:22:38,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27746951] [2023-01-27 19:22:38,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:22:38,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:22:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:22:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:22:38,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 601 [2023-01-27 19:22:38,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 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 19:22:38,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:38,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 601 [2023-01-27 19:22:38,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:01,659 INFO L130 PetriNetUnfolder]: 270198/371081 cut-off events. [2023-01-27 19:23:01,659 INFO L131 PetriNetUnfolder]: For 12741/12741 co-relation queries the response was YES. [2023-01-27 19:23:02,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740054 conditions, 371081 events. 270198/371081 cut-off events. For 12741/12741 co-relation queries the response was YES. Maximal size of possible extension queue 9709. Compared 2793991 event pairs, 76302 based on Foata normal form. 0/325975 useless extension candidates. Maximal degree in co-relation 740017. Up to 315645 conditions per place. [2023-01-27 19:23:03,292 INFO L137 encePairwiseOnDemand]: 589/601 looper letters, 193 selfloop transitions, 18 changer transitions 0/225 dead transitions. [2023-01-27 19:23:03,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 225 transitions, 997 flow [2023-01-27 19:23:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:23:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:23:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1542 transitions. [2023-01-27 19:23:03,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276206322795341 [2023-01-27 19:23:03,297 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1542 transitions. [2023-01-27 19:23:03,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1542 transitions. [2023-01-27 19:23:03,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:03,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1542 transitions. [2023-01-27 19:23:03,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 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 19:23:03,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 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 19:23:03,305 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 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 19:23:03,305 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1542 transitions. [2023-01-27 19:23:03,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 225 transitions, 997 flow [2023-01-27 19:23:03,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 225 transitions, 983 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:23:03,312 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 375 flow [2023-01-27 19:23:03,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2023-01-27 19:23:03,313 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 20 predicate places. [2023-01-27 19:23:03,313 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 375 flow [2023-01-27 19:23:03,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 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 19:23:03,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:03,314 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:03,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 19:23:03,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 19:23:03,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:23:03,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash 756541926, now seen corresponding path program 1 times [2023-01-27 19:23:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:03,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374521903] [2023-01-27 19:23:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:03,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 19:23:03,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374521903] [2023-01-27 19:23:03,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374521903] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437782568] [2023-01-27 19:23:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:03,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:03,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:03,586 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:23:03,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 19:23:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:03,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:23:03,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 19:23:03,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:23:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 19:23:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437782568] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:23:03,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:23:03,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:23:03,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166365272] [2023-01-27 19:23:03,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:23:03,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:23:03,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:03,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:23:03,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:23:03,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-27 19:23:03,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 375 flow. Second operand has 13 states, 13 states have (on average 263.46153846153845) internal successors, (3425), 13 states have internal predecessors, (3425), 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 19:23:03,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:03,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-27 19:23:03,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:29,082 INFO L130 PetriNetUnfolder]: 256976/356476 cut-off events. [2023-01-27 19:23:29,082 INFO L131 PetriNetUnfolder]: For 146740/146902 co-relation queries the response was YES. [2023-01-27 19:23:30,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798765 conditions, 356476 events. 256976/356476 cut-off events. For 146740/146902 co-relation queries the response was YES. Maximal size of possible extension queue 9442. Compared 2729490 event pairs, 229060 based on Foata normal form. 70/333965 useless extension candidates. Maximal degree in co-relation 798705. Up to 340753 conditions per place. [2023-01-27 19:23:31,197 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 90 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-01-27 19:23:31,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 116 transitions, 613 flow [2023-01-27 19:23:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:23:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:23:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3234 transitions. [2023-01-27 19:23:31,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841930116472545 [2023-01-27 19:23:31,205 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3234 transitions. [2023-01-27 19:23:31,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3234 transitions. [2023-01-27 19:23:31,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:31,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3234 transitions. [2023-01-27 19:23:31,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 269.5) internal successors, (3234), 12 states have internal predecessors, (3234), 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 19:23:31,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 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 19:23:31,220 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 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 19:23:31,220 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 375 flow. Second operand 12 states and 3234 transitions. [2023-01-27 19:23:31,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 116 transitions, 613 flow [2023-01-27 19:23:31,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 116 transitions, 613 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:23:31,702 INFO L231 Difference]: Finished difference. Result has 125 places, 116 transitions, 459 flow [2023-01-27 19:23:31,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=125, PETRI_TRANSITIONS=116} [2023-01-27 19:23:31,703 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 37 predicate places. [2023-01-27 19:23:31,703 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 116 transitions, 459 flow [2023-01-27 19:23:31,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 263.46153846153845) internal successors, (3425), 13 states have internal predecessors, (3425), 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 19:23:31,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:31,704 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:31,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-27 19:23:31,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 19:23:31,905 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:23:31,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:31,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1545885414, now seen corresponding path program 2 times [2023-01-27 19:23:31,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:31,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426824899] [2023-01-27 19:23:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:23:31,923 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:23:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:23:31,944 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:23:31,945 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:23:31,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 19:23:31,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 19:23:31,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 19:23:31,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 19:23:31,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 19:23:31,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 19:23:31,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-27 19:23:31,946 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-01-27 19:23:31,946 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:23:31,946 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:23:31,977 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:23:31,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-01-27 19:23:32,086 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-01-27 19:23:32,087 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-27 19:23:32,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-01-27 19:23:32,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 400 transitions, 844 flow [2023-01-27 19:23:32,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 400 transitions, 844 flow [2023-01-27 19:23:32,104 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:23:32,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 400 transitions, 844 flow [2023-01-27 19:23:32,104 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 400 transitions, 844 flow [2023-01-27 19:23:32,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-01-27 19:23:32,219 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-01-27 19:23:32,219 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-27 19:23:32,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-01-27 19:23:32,279 INFO L119 LiptonReduction]: Number of co-enabled transitions 101456 [2023-01-27 19:23:35,906 INFO L134 LiptonReduction]: Checked pairs total: 181238 [2023-01-27 19:23:35,907 INFO L136 LiptonReduction]: Total number of compositions: 324 [2023-01-27 19:23:35,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:23:35,908 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;@21346244, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:23:35,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 19:23:35,910 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:23:35,910 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:23:35,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:35,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:23:35,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 19:23:35,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash 121547453, now seen corresponding path program 1 times [2023-01-27 19:23:35,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:35,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210702499] [2023-01-27 19:23:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:35,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:35,942 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 19:23:35,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:35,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210702499] [2023-01-27 19:23:35,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210702499] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:23:35,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:23:35,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:23:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569810502] [2023-01-27 19:23:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:23:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:23:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:23:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:23:35,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 724 [2023-01-27 19:23:35,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 19:23:35,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:35,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 724 [2023-01-27 19:23:35,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand