/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:55:41,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:55:41,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:55:41,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:55:41,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:55:41,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:55:41,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:55:41,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:55:41,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:55:41,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:55:41,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:55:41,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:55:41,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:55:41,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:55:41,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:55:41,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:55:41,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:55:41,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:55:41,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:55:41,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:55:41,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:55:41,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:55:41,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:55:41,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:55:41,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 07:55:41,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:55:41,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:55:41,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:55:41,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 07:55:41,704 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:55:41,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:55:41,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:55:41,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:55:41,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:55:41,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:55:41,706 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:55:41,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:55:41,707 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:55:41,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:55:41,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:55:41,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:55:41,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:55:41,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:55:41,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:55:41,708 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:55:41,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:55:41,708 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:55:41,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:55:41,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:55:41,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:55:41,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:55:41,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:55:41,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:55:41,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:55:41,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:55:41,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:55:41,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:55:41,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:55:41,710 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:55:41,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:55:41,711 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:55:41,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:55:41,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:55:41,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:55:41,943 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:55:41,944 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:55:41,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-01-28 07:55:43,027 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:55:43,232 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:55:43,233 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-01-28 07:55:43,251 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dcc8d634/dd301d4ac3894cc8b0a9939c598ccfa6/FLAG07f407aa3 [2023-01-28 07:55:43,268 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dcc8d634/dd301d4ac3894cc8b0a9939c598ccfa6 [2023-01-28 07:55:43,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:55:43,272 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:55:43,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:55:43,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:55:43,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:55:43,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32852b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43, skipping insertion in model container [2023-01-28 07:55:43,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:55:43,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:55:43,548 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_51-mutexptr_racefree.i[30176,30189] [2023-01-28 07:55:43,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:55:43,581 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:55:43,653 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_51-mutexptr_racefree.i[30176,30189] [2023-01-28 07:55:43,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:55:43,709 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:55:43,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43 WrapperNode [2023-01-28 07:55:43,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:55:43,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:55:43,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:55:43,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:55:43,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,753 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2023-01-28 07:55:43,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:55:43,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:55:43,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:55:43,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:55:43,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,775 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:55:43,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:55:43,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:55:43,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:55:43,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (1/1) ... [2023-01-28 07:55:43,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:55:43,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:43,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 07:55:43,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 07:55:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:55:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:55:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:55:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:55:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:55:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:55:43,859 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:55:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:55:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:55:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:55:43,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:55:43,861 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 07:55:44,020 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:55:44,022 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:55:44,186 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:55:44,192 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:55:44,192 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-28 07:55:44,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:55:44 BoogieIcfgContainer [2023-01-28 07:55:44,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:55:44,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:55:44,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:55:44,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:55:44,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:55:43" (1/3) ... [2023-01-28 07:55:44,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb7b9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:55:44, skipping insertion in model container [2023-01-28 07:55:44,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:55:43" (2/3) ... [2023-01-28 07:55:44,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb7b9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:55:44, skipping insertion in model container [2023-01-28 07:55:44,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:55:44" (3/3) ... [2023-01-28 07:55:44,201 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-01-28 07:55:44,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:55:44,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:55:44,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:55:44,265 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:55:44,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 254 flow [2023-01-28 07:55:44,349 INFO L130 PetriNetUnfolder]: 17/159 cut-off events. [2023-01-28 07:55:44,349 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:55:44,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 159 events. 17/159 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 361 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-01-28 07:55:44,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 123 transitions, 254 flow [2023-01-28 07:55:44,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 118 transitions, 241 flow [2023-01-28 07:55:44,363 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:44,371 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 118 transitions, 241 flow [2023-01-28 07:55:44,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 118 transitions, 241 flow [2023-01-28 07:55:44,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 118 transitions, 241 flow [2023-01-28 07:55:44,400 INFO L130 PetriNetUnfolder]: 16/154 cut-off events. [2023-01-28 07:55:44,400 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:44,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 16/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 348 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-01-28 07:55:44,403 INFO L119 LiptonReduction]: Number of co-enabled transitions 2940 [2023-01-28 07:55:47,035 INFO L134 LiptonReduction]: Checked pairs total: 4871 [2023-01-28 07:55:47,035 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-01-28 07:55:47,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:47,054 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;@1608b059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:47,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:47,058 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-01-28 07:55:47,058 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:47,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:47,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:55:47,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:47,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash 14290802, now seen corresponding path program 1 times [2023-01-28 07:55:47,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:47,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040514588] [2023-01-28 07:55:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:47,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:47,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:47,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040514588] [2023-01-28 07:55:47,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040514588] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:47,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:47,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:47,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811053442] [2023-01-28 07:55:47,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:47,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:47,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:47,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:47,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:47,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 223 [2023-01-28 07:55:47,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 33 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:47,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 223 [2023-01-28 07:55:47,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:47,389 INFO L130 PetriNetUnfolder]: 72/178 cut-off events. [2023-01-28 07:55:47,389 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:47,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 178 events. 72/178 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 604 event pairs, 56 based on Foata normal form. 28/184 useless extension candidates. Maximal degree in co-relation 334. Up to 153 conditions per place. [2023-01-28 07:55:47,391 INFO L137 encePairwiseOnDemand]: 210/223 looper letters, 23 selfloop transitions, 2 changer transitions 6/33 dead transitions. [2023-01-28 07:55:47,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 129 flow [2023-01-28 07:55:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-01-28 07:55:47,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261584454409567 [2023-01-28 07:55:47,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-01-28 07:55:47,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-01-28 07:55:47,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:47,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-01-28 07:55:47,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,423 INFO L175 Difference]: Start difference. First operand has 27 places, 33 transitions, 71 flow. Second operand 3 states and 352 transitions. [2023-01-28 07:55:47,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 129 flow [2023-01-28 07:55:47,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:47,427 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 47 flow [2023-01-28 07:55:47,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-01-28 07:55:47,431 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-01-28 07:55:47,432 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 47 flow [2023-01-28 07:55:47,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:47,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:47,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:55:47,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:47,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:47,433 INFO L85 PathProgramCache]: Analyzing trace with hash 462761578, now seen corresponding path program 1 times [2023-01-28 07:55:47,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:47,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293641169] [2023-01-28 07:55:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:47,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:47,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293641169] [2023-01-28 07:55:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293641169] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:47,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256914047] [2023-01-28 07:55:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:47,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:47,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:47,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:55:47,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 07:55:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:47,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:47,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:47,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256914047] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:47,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:47,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:47,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529996948] [2023-01-28 07:55:47,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:47,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:47,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:47,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:47,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:47,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 223 [2023-01-28 07:55:47,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:47,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 223 [2023-01-28 07:55:47,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:47,773 INFO L130 PetriNetUnfolder]: 18/52 cut-off events. [2023-01-28 07:55:47,774 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-01-28 07:55:47,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 52 events. 18/52 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 10/62 useless extension candidates. Maximal degree in co-relation 116. Up to 38 conditions per place. [2023-01-28 07:55:47,774 INFO L137 encePairwiseOnDemand]: 220/223 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-01-28 07:55:47,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 105 flow [2023-01-28 07:55:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:55:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:55:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2023-01-28 07:55:47,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484304932735426 [2023-01-28 07:55:47,776 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2023-01-28 07:55:47,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2023-01-28 07:55:47,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:47,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2023-01-28 07:55:47,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 223.0) internal successors, (1115), 5 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,780 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 223.0) internal successors, (1115), 5 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,780 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 47 flow. Second operand 4 states and 432 transitions. [2023-01-28 07:55:47,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 105 flow [2023-01-28 07:55:47,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 07:55:47,780 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-01-28 07:55:47,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-01-28 07:55:47,781 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-01-28 07:55:47,781 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-01-28 07:55:47,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:47,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:55:47,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 07:55:47,991 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 [2023-01-28 07:55:47,991 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:55:47,994 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:55:47,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 254 flow [2023-01-28 07:55:48,012 INFO L130 PetriNetUnfolder]: 17/159 cut-off events. [2023-01-28 07:55:48,012 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:55:48,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 159 events. 17/159 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 361 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-01-28 07:55:48,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 123 transitions, 254 flow [2023-01-28 07:55:48,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 118 transitions, 241 flow [2023-01-28 07:55:48,015 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:48,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 118 transitions, 241 flow [2023-01-28 07:55:48,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 118 transitions, 241 flow [2023-01-28 07:55:48,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 118 transitions, 241 flow [2023-01-28 07:55:48,029 INFO L130 PetriNetUnfolder]: 16/154 cut-off events. [2023-01-28 07:55:48,029 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:48,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 16/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 348 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-01-28 07:55:48,033 INFO L119 LiptonReduction]: Number of co-enabled transitions 2940 [2023-01-28 07:55:50,392 INFO L134 LiptonReduction]: Checked pairs total: 5477 [2023-01-28 07:55:50,392 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-01-28 07:55:50,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:55:50,394 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;@1608b059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:50,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:50,396 INFO L130 PetriNetUnfolder]: 2/19 cut-off events. [2023-01-28 07:55:50,396 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:50,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:50,396 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:55:50,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:55:50,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash -493388243, now seen corresponding path program 1 times [2023-01-28 07:55:50,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:50,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705450447] [2023-01-28 07:55:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:50,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:50,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:55:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:50,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:55:50,432 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:55:50,432 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:55:50,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:55:50,432 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:55:50,432 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:55:50,433 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:55:50,433 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:55:50,458 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:55:50,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:50,482 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-01-28 07:55:50,482 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:50,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 749 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-01-28 07:55:50,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:50,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:50,484 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:50,484 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:50,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:50,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:50,501 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-01-28 07:55:50,501 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:50,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 749 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-01-28 07:55:50,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 9100 [2023-01-28 07:55:53,230 INFO L134 LiptonReduction]: Checked pairs total: 18934 [2023-01-28 07:55:53,231 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-01-28 07:55:53,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:53,233 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;@1608b059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:53,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:53,234 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-01-28 07:55:53,234 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:53,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:53,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:55:53,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:53,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:53,235 INFO L85 PathProgramCache]: Analyzing trace with hash 27277396, now seen corresponding path program 1 times [2023-01-28 07:55:53,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:53,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406026258] [2023-01-28 07:55:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:53,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:53,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:53,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406026258] [2023-01-28 07:55:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406026258] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:53,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:53,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910999619] [2023-01-28 07:55:53,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:53,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:53,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:53,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 285 [2023-01-28 07:55:53,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:53,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 285 [2023-01-28 07:55:53,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:53,511 INFO L130 PetriNetUnfolder]: 1655/2904 cut-off events. [2023-01-28 07:55:53,511 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-01-28 07:55:53,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5676 conditions, 2904 events. 1655/2904 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 16783 event pairs, 765 based on Foata normal form. 398/2966 useless extension candidates. Maximal degree in co-relation 587. Up to 2690 conditions per place. [2023-01-28 07:55:53,517 INFO L137 encePairwiseOnDemand]: 267/285 looper letters, 33 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-01-28 07:55:53,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-01-28 07:55:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-01-28 07:55:53,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345029239766081 [2023-01-28 07:55:53,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-01-28 07:55:53,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-01-28 07:55:53,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:53,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-01-28 07:55:53,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,523 INFO L175 Difference]: Start difference. First operand has 44 places, 56 transitions, 130 flow. Second operand 3 states and 457 transitions. [2023-01-28 07:55:53,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-01-28 07:55:53,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:53,524 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 82 flow [2023-01-28 07:55:53,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2023-01-28 07:55:53,525 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-01-28 07:55:53,525 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 82 flow [2023-01-28 07:55:53,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:53,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:53,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:55:53,525 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:53,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1620292980, now seen corresponding path program 1 times [2023-01-28 07:55:53,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:53,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776114703] [2023-01-28 07:55:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:53,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:53,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:53,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776114703] [2023-01-28 07:55:53,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776114703] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:53,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513817737] [2023-01-28 07:55:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:53,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:53,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:53,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:55:53,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 07:55:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:53,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:53,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:53,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513817737] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:53,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:53,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601375672] [2023-01-28 07:55:53,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:53,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:53,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 285 [2023-01-28 07:55:53,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:53,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 285 [2023-01-28 07:55:53,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:53,775 INFO L130 PetriNetUnfolder]: 418/748 cut-off events. [2023-01-28 07:55:53,776 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-01-28 07:55:53,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 748 events. 418/748 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3369 event pairs, 72 based on Foata normal form. 99/846 useless extension candidates. Maximal degree in co-relation 179. Up to 502 conditions per place. [2023-01-28 07:55:53,777 INFO L137 encePairwiseOnDemand]: 282/285 looper letters, 0 selfloop transitions, 0 changer transitions 56/56 dead transitions. [2023-01-28 07:55:53,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 228 flow [2023-01-28 07:55:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:55:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:55:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 707 transitions. [2023-01-28 07:55:53,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496140350877193 [2023-01-28 07:55:53,779 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 707 transitions. [2023-01-28 07:55:53,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 707 transitions. [2023-01-28 07:55:53,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:53,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 707 transitions. [2023-01-28 07:55:53,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,783 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,783 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 82 flow. Second operand 5 states and 707 transitions. [2023-01-28 07:55:53,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 228 flow [2023-01-28 07:55:53,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:55:53,783 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-01-28 07:55:53,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-01-28 07:55:53,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-01-28 07:55:53,784 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-01-28 07:55:53,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:53,785 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:55:53,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 07:55:53,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:53,989 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:55:53,990 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:55:53,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:54,003 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-01-28 07:55:54,003 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:54,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 749 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-01-28 07:55:54,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:54,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:54,005 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:54,005 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:54,005 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:54,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 160 transitions, 338 flow [2023-01-28 07:55:54,017 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-01-28 07:55:54,017 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:54,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 749 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-01-28 07:55:54,021 INFO L119 LiptonReduction]: Number of co-enabled transitions 9100 [2023-01-28 07:55:56,608 INFO L134 LiptonReduction]: Checked pairs total: 17653 [2023-01-28 07:55:56,608 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-01-28 07:55:56,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:55:56,614 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;@1608b059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:56,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:56,617 INFO L130 PetriNetUnfolder]: 12/55 cut-off events. [2023-01-28 07:55:56,617 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 07:55:56,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:56,618 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:55:56,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:55:56,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:56,622 INFO L85 PathProgramCache]: Analyzing trace with hash -259799944, now seen corresponding path program 1 times [2023-01-28 07:55:56,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:56,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494954286] [2023-01-28 07:55:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:56,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:56,648 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:55:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:56,659 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:55:56,659 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:55:56,659 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:55:56,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:55:56,660 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:55:56,660 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:55:56,660 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:55:56,660 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:55:56,681 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 07:55:56,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 197 transitions, 424 flow [2023-01-28 07:55:56,705 INFO L130 PetriNetUnfolder]: 50/384 cut-off events. [2023-01-28 07:55:56,705 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:56,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 50/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1280 event pairs, 1 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-01-28 07:55:56,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 197 transitions, 424 flow [2023-01-28 07:55:56,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 197 transitions, 424 flow [2023-01-28 07:55:56,708 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:56,709 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 197 transitions, 424 flow [2023-01-28 07:55:56,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 197 transitions, 424 flow [2023-01-28 07:55:56,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 197 transitions, 424 flow [2023-01-28 07:55:56,731 INFO L130 PetriNetUnfolder]: 50/384 cut-off events. [2023-01-28 07:55:56,731 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:56,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 50/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1280 event pairs, 1 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-01-28 07:55:56,742 INFO L119 LiptonReduction]: Number of co-enabled transitions 17640 [2023-01-28 07:55:59,386 INFO L134 LiptonReduction]: Checked pairs total: 41212 [2023-01-28 07:55:59,386 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-01-28 07:55:59,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:59,388 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;@1608b059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:59,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:59,389 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-01-28 07:55:59,389 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:59,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:59,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:55:59,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:55:59,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash 42980710, now seen corresponding path program 1 times [2023-01-28 07:55:59,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:59,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096052616] [2023-01-28 07:55:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:59,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:59,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:59,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096052616] [2023-01-28 07:55:59,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096052616] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:59,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:59,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:59,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722765111] [2023-01-28 07:55:59,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:59,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:59,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:59,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 348 [2023-01-28 07:55:59,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 75 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:59,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:59,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 348 [2023-01-28 07:55:59,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:56:01,888 INFO L130 PetriNetUnfolder]: 26726/38974 cut-off events. [2023-01-28 07:56:01,888 INFO L131 PetriNetUnfolder]: For 1247/1247 co-relation queries the response was YES. [2023-01-28 07:56:01,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77478 conditions, 38974 events. 26726/38974 cut-off events. For 1247/1247 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 255843 event pairs, 17326 based on Foata normal form. 7485/43121 useless extension candidates. Maximal degree in co-relation 6226. Up to 37651 conditions per place. [2023-01-28 07:56:01,986 INFO L137 encePairwiseOnDemand]: 324/348 looper letters, 43 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2023-01-28 07:56:01,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 264 flow [2023-01-28 07:56:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:56:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:56:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-01-28 07:56:01,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373563218390804 [2023-01-28 07:56:01,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-01-28 07:56:01,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-01-28 07:56:01,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:56:01,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-01-28 07:56:01,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:01,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:01,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:01,991 INFO L175 Difference]: Start difference. First operand has 58 places, 75 transitions, 180 flow. Second operand 3 states and 561 transitions. [2023-01-28 07:56:01,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 264 flow [2023-01-28 07:56:01,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:56:01,995 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 113 flow [2023-01-28 07:56:01,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-01-28 07:56:01,996 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-01-28 07:56:01,996 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 113 flow [2023-01-28 07:56:01,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:01,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:01,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:56:01,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:56:01,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:56:01,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash 98603169, now seen corresponding path program 1 times [2023-01-28 07:56:01,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:01,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048050438] [2023-01-28 07:56:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:01,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:56:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048050438] [2023-01-28 07:56:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048050438] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:56:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339642166] [2023-01-28 07:56:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:02,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:56:02,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:56:02,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:56:02,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 07:56:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:02,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:56:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:56:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:02,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:56:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:02,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339642166] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:56:02,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:56:02,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:56:02,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321979412] [2023-01-28 07:56:02,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:56:02,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:56:02,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:56:02,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:56:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:56:02,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 348 [2023-01-28 07:56:02,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:02,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:56:02,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 348 [2023-01-28 07:56:02,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:56:02,718 INFO L130 PetriNetUnfolder]: 6868/10156 cut-off events. [2023-01-28 07:56:02,718 INFO L131 PetriNetUnfolder]: For 1297/1297 co-relation queries the response was YES. [2023-01-28 07:56:02,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 10156 events. 6868/10156 cut-off events. For 1297/1297 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 59555 event pairs, 77 based on Foata normal form. 999/11154 useless extension candidates. Maximal degree in co-relation 18910. Up to 6640 conditions per place. [2023-01-28 07:56:02,733 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 0 selfloop transitions, 0 changer transitions 96/96 dead transitions. [2023-01-28 07:56:02,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 96 transitions, 393 flow [2023-01-28 07:56:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:56:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:56:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1051 transitions. [2023-01-28 07:56:02,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033524904214559 [2023-01-28 07:56:02,736 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1051 transitions. [2023-01-28 07:56:02,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1051 transitions. [2023-01-28 07:56:02,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:56:02,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1051 transitions. [2023-01-28 07:56:02,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.16666666666666) internal successors, (1051), 6 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:02,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:02,741 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:02,741 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 113 flow. Second operand 6 states and 1051 transitions. [2023-01-28 07:56:02,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 96 transitions, 393 flow [2023-01-28 07:56:02,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 96 transitions, 389 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:56:02,743 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-01-28 07:56:02,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-01-28 07:56:02,745 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-01-28 07:56:02,745 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-01-28 07:56:02,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:02,746 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:56:02,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 07:56:02,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:56:02,970 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:56:02,971 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:56:02,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 197 transitions, 424 flow [2023-01-28 07:56:02,992 INFO L130 PetriNetUnfolder]: 50/384 cut-off events. [2023-01-28 07:56:02,992 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:56:02,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 50/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1280 event pairs, 1 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-01-28 07:56:02,993 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 197 transitions, 424 flow [2023-01-28 07:56:02,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 197 transitions, 424 flow [2023-01-28 07:56:02,995 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:56:02,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 197 transitions, 424 flow [2023-01-28 07:56:02,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 197 transitions, 424 flow [2023-01-28 07:56:02,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 197 transitions, 424 flow [2023-01-28 07:56:03,014 INFO L130 PetriNetUnfolder]: 50/384 cut-off events. [2023-01-28 07:56:03,014 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:56:03,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 50/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1280 event pairs, 1 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-01-28 07:56:03,019 INFO L119 LiptonReduction]: Number of co-enabled transitions 17640 [2023-01-28 07:56:05,316 INFO L134 LiptonReduction]: Checked pairs total: 37043 [2023-01-28 07:56:05,317 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-01-28 07:56:05,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:56:05,321 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;@1608b059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:56:05,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:56:05,325 INFO L130 PetriNetUnfolder]: 22/90 cut-off events. [2023-01-28 07:56:05,325 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 07:56:05,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:05,325 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:56:05,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:56:05,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:05,325 INFO L85 PathProgramCache]: Analyzing trace with hash 252540505, now seen corresponding path program 1 times [2023-01-28 07:56:05,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:05,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802544894] [2023-01-28 07:56:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:05,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:56:05,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:56:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:56:05,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:56:05,373 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:56:05,373 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:56:05,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:56:05,373 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:56:05,374 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:56:05,374 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:56:05,374 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:56:05,399 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 07:56:05,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 234 transitions, 512 flow [2023-01-28 07:56:05,447 INFO L130 PetriNetUnfolder]: 81/576 cut-off events. [2023-01-28 07:56:05,447 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:56:05,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 576 events. 81/576 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2235 event pairs, 6 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-01-28 07:56:05,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 234 transitions, 512 flow [2023-01-28 07:56:05,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 234 transitions, 512 flow [2023-01-28 07:56:05,452 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:56:05,452 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 234 transitions, 512 flow [2023-01-28 07:56:05,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 234 transitions, 512 flow [2023-01-28 07:56:05,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 234 transitions, 512 flow [2023-01-28 07:56:05,494 INFO L130 PetriNetUnfolder]: 81/576 cut-off events. [2023-01-28 07:56:05,494 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:56:05,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 576 events. 81/576 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2235 event pairs, 6 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-01-28 07:56:05,504 INFO L119 LiptonReduction]: Number of co-enabled transitions 28840 [2023-01-28 07:56:08,433 INFO L134 LiptonReduction]: Checked pairs total: 68897 [2023-01-28 07:56:08,434 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-01-28 07:56:08,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:56:08,435 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;@1608b059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:56:08,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:56:08,437 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-01-28 07:56:08,437 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:56:08,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:08,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:56:08,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:56:08,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:08,437 INFO L85 PathProgramCache]: Analyzing trace with hash 61137221, now seen corresponding path program 1 times [2023-01-28 07:56:08,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:08,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98879490] [2023-01-28 07:56:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:08,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:08,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:56:08,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98879490] [2023-01-28 07:56:08,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98879490] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:56:08,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:56:08,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:56:08,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099119049] [2023-01-28 07:56:08,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:56:08,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:56:08,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:56:08,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:56:08,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:56:08,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 405 [2023-01-28 07:56:08,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:08,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:56:08,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 405 [2023-01-28 07:56:08,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:56:43,050 INFO L130 PetriNetUnfolder]: 413529/548478 cut-off events. [2023-01-28 07:56:43,050 INFO L131 PetriNetUnfolder]: For 20310/20310 co-relation queries the response was YES. [2023-01-28 07:56:43,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1097267 conditions, 548478 events. 413529/548478 cut-off events. For 20310/20310 co-relation queries the response was YES. Maximal size of possible extension queue 9889. Compared 3882430 event pairs, 399008 based on Foata normal form. 108220/618654 useless extension candidates. Maximal degree in co-relation 113639. Up to 537994 conditions per place. [2023-01-28 07:56:44,726 INFO L137 encePairwiseOnDemand]: 375/405 looper letters, 54 selfloop transitions, 2 changer transitions 12/77 dead transitions. [2023-01-28 07:56:44,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 328 flow [2023-01-28 07:56:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:56:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:56:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2023-01-28 07:56:44,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2023-01-28 07:56:44,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2023-01-28 07:56:44,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2023-01-28 07:56:44,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:56:44,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2023-01-28 07:56:44,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:44,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:44,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:44,733 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 232 flow. Second operand 3 states and 666 transitions. [2023-01-28 07:56:44,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 328 flow [2023-01-28 07:56:44,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:56:44,745 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 146 flow [2023-01-28 07:56:44,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-01-28 07:56:44,745 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-01-28 07:56:44,746 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 146 flow [2023-01-28 07:56:44,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:44,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:56:44,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:56:44,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:56:44,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:56:44,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:56:44,746 INFO L85 PathProgramCache]: Analyzing trace with hash 347131313, now seen corresponding path program 1 times [2023-01-28 07:56:44,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:56:44,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270799381] [2023-01-28 07:56:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:44,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:56:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:44,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:56:44,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270799381] [2023-01-28 07:56:44,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270799381] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:56:44,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656325812] [2023-01-28 07:56:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:56:44,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:56:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:56:44,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:56:44,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 07:56:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:56:44,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:56:44,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:56:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:44,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:56:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:56:44,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656325812] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:56:44,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:56:44,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:56:44,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888595161] [2023-01-28 07:56:44,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:56:44,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:56:44,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:56:44,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:56:44,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:56:44,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 405 [2023-01-28 07:56:44,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 191.28571428571428) internal successors, (1339), 7 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:56:44,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:56:44,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 405 [2023-01-28 07:56:44,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:00,086 INFO L130 PetriNetUnfolder]: 211588/276988 cut-off events. [2023-01-28 07:57:00,086 INFO L131 PetriNetUnfolder]: For 16578/16578 co-relation queries the response was YES. [2023-01-28 07:57:00,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576681 conditions, 276988 events. 211588/276988 cut-off events. For 16578/16578 co-relation queries the response was YES. Maximal size of possible extension queue 5682. Compared 1845086 event pairs, 9000 based on Foata normal form. 999/277987 useless extension candidates. Maximal degree in co-relation 65610. Up to 182081 conditions per place. [2023-01-28 07:57:01,408 INFO L137 encePairwiseOnDemand]: 401/405 looper letters, 134 selfloop transitions, 5 changer transitions 1/149 dead transitions. [2023-01-28 07:57:01,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 149 transitions, 616 flow [2023-01-28 07:57:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:57:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:57:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1277 transitions. [2023-01-28 07:57:01,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525514403292181 [2023-01-28 07:57:01,411 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1277 transitions. [2023-01-28 07:57:01,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1277 transitions. [2023-01-28 07:57:01,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:01,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1277 transitions. [2023-01-28 07:57:01,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 212.83333333333334) internal successors, (1277), 6 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:01,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 405.0) internal successors, (2835), 7 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:01,416 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 405.0) internal successors, (2835), 7 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:01,416 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 146 flow. Second operand 6 states and 1277 transitions. [2023-01-28 07:57:01,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 149 transitions, 616 flow [2023-01-28 07:57:01,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 149 transitions, 608 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 07:57:01,454 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-01-28 07:57:01,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-01-28 07:57:01,455 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-01-28 07:57:01,455 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-01-28 07:57:01,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 191.28571428571428) internal successors, (1339), 7 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:01,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:01,456 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:57:01,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 07:57:01,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:01,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:01,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash 913786031, now seen corresponding path program 1 times [2023-01-28 07:57:01,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:01,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737598319] [2023-01-28 07:57:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:01,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:01,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737598319] [2023-01-28 07:57:01,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737598319] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:57:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123872299] [2023-01-28 07:57:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:01,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:01,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:57:01,761 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:57:01,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 07:57:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 07:57:01,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:57:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:01,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:57:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:01,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123872299] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:57:01,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:57:01,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 07:57:01,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233928337] [2023-01-28 07:57:01,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:57:01,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 07:57:01,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 07:57:01,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 07:57:01,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 405 [2023-01-28 07:57:01,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 191.6153846153846) internal successors, (2491), 13 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:01,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:01,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 405 [2023-01-28 07:57:01,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:07,269 INFO L130 PetriNetUnfolder]: 69108/94008 cut-off events. [2023-01-28 07:57:07,270 INFO L131 PetriNetUnfolder]: For 76293/76293 co-relation queries the response was YES. [2023-01-28 07:57:07,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222616 conditions, 94008 events. 69108/94008 cut-off events. For 76293/76293 co-relation queries the response was YES. Maximal size of possible extension queue 2182. Compared 599470 event pairs, 0 based on Foata normal form. 9900/103908 useless extension candidates. Maximal degree in co-relation 25279. Up to 45520 conditions per place. [2023-01-28 07:57:07,536 INFO L137 encePairwiseOnDemand]: 402/405 looper letters, 0 selfloop transitions, 0 changer transitions 145/145 dead transitions. [2023-01-28 07:57:07,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 145 transitions, 616 flow [2023-01-28 07:57:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 07:57:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 07:57:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1460 transitions. [2023-01-28 07:57:07,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149911816578483 [2023-01-28 07:57:07,539 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1460 transitions. [2023-01-28 07:57:07,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1460 transitions. [2023-01-28 07:57:07,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:07,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1460 transitions. [2023-01-28 07:57:07,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:07,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 405.0) internal successors, (3240), 8 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:07,545 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 405.0) internal successors, (3240), 8 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:07,545 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 7 states and 1460 transitions. [2023-01-28 07:57:07,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 145 transitions, 616 flow [2023-01-28 07:57:07,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 145 transitions, 597 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-01-28 07:57:07,725 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-01-28 07:57:07,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-01-28 07:57:07,726 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-01-28 07:57:07,726 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-01-28 07:57:07,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 191.6153846153846) internal successors, (2491), 13 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:07,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:57:07,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 07:57:07,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 07:57:07,932 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:57:07,933 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:57:07,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 234 transitions, 512 flow [2023-01-28 07:57:08,175 INFO L130 PetriNetUnfolder]: 81/576 cut-off events. [2023-01-28 07:57:08,175 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:57:08,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 576 events. 81/576 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2235 event pairs, 6 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-01-28 07:57:08,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 234 transitions, 512 flow [2023-01-28 07:57:08,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 234 transitions, 512 flow [2023-01-28 07:57:08,181 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:08,181 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 234 transitions, 512 flow [2023-01-28 07:57:08,182 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 234 transitions, 512 flow [2023-01-28 07:57:08,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 234 transitions, 512 flow [2023-01-28 07:57:08,225 INFO L130 PetriNetUnfolder]: 81/576 cut-off events. [2023-01-28 07:57:08,226 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:57:08,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 576 events. 81/576 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2235 event pairs, 6 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-01-28 07:57:08,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 28840 [2023-01-28 07:57:11,113 INFO L134 LiptonReduction]: Checked pairs total: 68309 [2023-01-28 07:57:11,113 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-01-28 07:57:11,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:57:11,115 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;@1608b059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:11,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:11,120 INFO L130 PetriNetUnfolder]: 29/127 cut-off events. [2023-01-28 07:57:11,120 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 07:57:11,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:11,120 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 07:57:11,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:57:11,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:11,121 INFO L85 PathProgramCache]: Analyzing trace with hash 11131758, now seen corresponding path program 1 times [2023-01-28 07:57:11,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:11,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340738538] [2023-01-28 07:57:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:11,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:11,150 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:57:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:11,166 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:57:11,166 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:57:11,166 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:57:11,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 07:57:11,166 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:57:11,167 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:57:11,168 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:57:11,168 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 07:57:11,191 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-28 07:57:11,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 271 transitions, 602 flow [2023-01-28 07:57:11,268 INFO L130 PetriNetUnfolder]: 140/900 cut-off events. [2023-01-28 07:57:11,269 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:57:11,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 140/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4077 event pairs, 23 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 621. Up to 80 conditions per place. [2023-01-28 07:57:11,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 271 transitions, 602 flow [2023-01-28 07:57:11,280 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 271 transitions, 602 flow [2023-01-28 07:57:11,280 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:11,280 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 271 transitions, 602 flow [2023-01-28 07:57:11,280 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 271 transitions, 602 flow [2023-01-28 07:57:11,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 271 transitions, 602 flow [2023-01-28 07:57:11,352 INFO L130 PetriNetUnfolder]: 140/900 cut-off events. [2023-01-28 07:57:11,353 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:57:11,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 140/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4077 event pairs, 23 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 621. Up to 80 conditions per place. [2023-01-28 07:57:11,382 INFO L119 LiptonReduction]: Number of co-enabled transitions 42700 [2023-01-28 07:57:14,574 INFO L134 LiptonReduction]: Checked pairs total: 93089 [2023-01-28 07:57:14,574 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-01-28 07:57:14,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:57:14,576 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;@1608b059, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:14,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:14,577 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 07:57:14,577 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:14,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:14,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:57:14,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:14,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash 81734324, now seen corresponding path program 1 times [2023-01-28 07:57:14,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:14,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308213543] [2023-01-28 07:57:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:14,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:14,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:14,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308213543] [2023-01-28 07:57:14,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308213543] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:14,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:14,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:57:14,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762951393] [2023-01-28 07:57:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:14,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:14,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:14,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 463 [2023-01-28 07:57:14,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 113 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:14,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:14,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 463 [2023-01-28 07:57:14,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand