/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_05-lockfuns_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:46:05,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:46:05,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:46:05,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 07:46:05,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:46:05,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:46:05,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:46:05,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:46:05,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:46:05,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:46:05,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:46:05,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:46:05,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:46:05,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:46:05,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:46:05,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:46:05,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 07:46:05,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 07:46:05,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 07:46:05,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 07:46:05,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 07:46:05,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2023-01-28 07:46:05,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:46:05,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:46:05,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:46:05,457 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 07:46:05,480 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:46:05,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:46:05,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:46:05,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:46:05,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:46:05,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:46:05,482 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:46:05,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:46:05,482 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:46:05,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:46:05,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:46:05,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:46:05,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:46:05,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:46:05,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:46:05,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:46:05,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:46:05,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:46:05,484 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:46:05,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:46:05,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:46:05,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:46:05,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:46:05,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:46:05,708 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:46:05,709 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:46:05,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-01-28 07:46:06,861 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:46:07,080 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:46:07,080 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-01-28 07:46:07,089 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2d8f159a/7aac42b376ef44f4996f47161279033c/FLAG0508cac52 [2023-01-28 07:46:07,098 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2d8f159a/7aac42b376ef44f4996f47161279033c [2023-01-28 07:46:07,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:46:07,101 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:46:07,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:46:07,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:46:07,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:46:07,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be49c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07, skipping insertion in model container [2023-01-28 07:46:07,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:46:07,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:46:07,372 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_05-lockfuns_racefree.i[30176,30189] [2023-01-28 07:46:07,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:46:07,400 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:46:07,436 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_05-lockfuns_racefree.i[30176,30189] [2023-01-28 07:46:07,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:46:07,471 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:46:07,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07 WrapperNode [2023-01-28 07:46:07,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:46:07,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:46:07,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:46:07,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:46:07,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,521 INFO L138 Inliner]: procedures = 172, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2023-01-28 07:46:07,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:46:07,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:46:07,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:46:07,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:46:07,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,547 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:46:07,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:46:07,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:46:07,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:46:07,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (1/1) ... [2023-01-28 07:46:07,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:46:07,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:46:07,574 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 07:46:07,581 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 07:46:07,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:46:07,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:46:07,606 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:46:07,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:46:07,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:46:07,607 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:46:07,607 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:46:07,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:46:07,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:46:07,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:46:07,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:46:07,608 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 07:46:07,747 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:46:07,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:46:07,882 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:46:07,887 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:46:07,887 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-28 07:46:07,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:46:07 BoogieIcfgContainer [2023-01-28 07:46:07,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:46:07,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:46:07,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:46:07,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:46:07,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:46:07" (1/3) ... [2023-01-28 07:46:07,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5cab58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:46:07, skipping insertion in model container [2023-01-28 07:46:07,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:46:07" (2/3) ... [2023-01-28 07:46:07,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5cab58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:46:07, skipping insertion in model container [2023-01-28 07:46:07,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:46:07" (3/3) ... [2023-01-28 07:46:07,894 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2023-01-28 07:46:07,908 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:46:07,908 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:46:07,908 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:46:07,945 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:46:07,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 103 transitions, 214 flow [2023-01-28 07:46:08,016 INFO L130 PetriNetUnfolder]: 17/138 cut-off events. [2023-01-28 07:46:08,016 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:46:08,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 138 events. 17/138 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 315 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-01-28 07:46:08,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 103 transitions, 214 flow [2023-01-28 07:46:08,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 98 transitions, 201 flow [2023-01-28 07:46:08,025 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:46:08,040 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 98 transitions, 201 flow [2023-01-28 07:46:08,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 98 transitions, 201 flow [2023-01-28 07:46:08,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 98 transitions, 201 flow [2023-01-28 07:46:08,062 INFO L130 PetriNetUnfolder]: 16/133 cut-off events. [2023-01-28 07:46:08,062 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:46:08,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 133 events. 16/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 304 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-01-28 07:46:08,064 INFO L119 LiptonReduction]: Number of co-enabled transitions 2460 [2023-01-28 07:46:09,914 INFO L134 LiptonReduction]: Checked pairs total: 3508 [2023-01-28 07:46:09,914 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-01-28 07:46:09,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:46:09,927 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;@384904fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:46:09,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:46:09,930 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2023-01-28 07:46:09,930 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:46:09,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:09,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:46:09,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:46:09,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:09,937 INFO L85 PathProgramCache]: Analyzing trace with hash 12455141, now seen corresponding path program 1 times [2023-01-28 07:46:09,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:09,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881996639] [2023-01-28 07:46:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:09,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:10,139 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 07:46:10,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:46:10,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881996639] [2023-01-28 07:46:10,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881996639] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:46:10,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:46:10,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:46:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668861092] [2023-01-28 07:46:10,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:46:10,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:46:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:46:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:46:10,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:46:10,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 184 [2023-01-28 07:46:10,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 07:46:10,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:46:10,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 184 [2023-01-28 07:46:10,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:46:10,248 INFO L130 PetriNetUnfolder]: 72/183 cut-off events. [2023-01-28 07:46:10,248 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:46:10,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 183 events. 72/183 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 744 event pairs, 0 based on Foata normal form. 19/175 useless extension candidates. Maximal degree in co-relation 332. Up to 154 conditions per place. [2023-01-28 07:46:10,250 INFO L137 encePairwiseOnDemand]: 172/184 looper letters, 20 selfloop transitions, 2 changer transitions 7/31 dead transitions. [2023-01-28 07:46:10,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 123 flow [2023-01-28 07:46:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:46:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:46:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-01-28 07:46:10,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2023-01-28 07:46:10,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-01-28 07:46:10,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-01-28 07:46:10,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:46:10,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-01-28 07:46:10,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 07:46:10,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 07:46:10,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 07:46:10,276 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 290 transitions. [2023-01-28 07:46:10,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 123 flow [2023-01-28 07:46:10,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:46:10,279 INFO L231 Difference]: Finished difference. Result has 28 places, 16 transitions, 43 flow [2023-01-28 07:46:10,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=28, PETRI_TRANSITIONS=16} [2023-01-28 07:46:10,284 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-01-28 07:46:10,284 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 16 transitions, 43 flow [2023-01-28 07:46:10,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 07:46:10,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:10,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:46:10,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:46:10,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:46:10,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:10,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1175566954, now seen corresponding path program 1 times [2023-01-28 07:46:10,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:10,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454326672] [2023-01-28 07:46:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:10,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:10,380 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 07:46:10,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:46:10,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454326672] [2023-01-28 07:46:10,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454326672] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:46:10,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433155609] [2023-01-28 07:46:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:10,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:46:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:46:10,384 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 07:46:10,419 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 07:46:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:10,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:46:10,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:46:10,469 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 07:46:10,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:46:10,498 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 07:46:10,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433155609] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:46:10,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:46:10,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:46:10,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058088649] [2023-01-28 07:46:10,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:46:10,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:46:10,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:46:10,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:46:10,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:46:10,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 184 [2023-01-28 07:46:10,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 16 transitions, 43 flow. Second operand has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 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 07:46:10,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:46:10,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 184 [2023-01-28 07:46:10,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:46:10,543 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-01-28 07:46:10,543 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 07:46:10,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 46 events. 16/46 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-01-28 07:46:10,543 INFO L137 encePairwiseOnDemand]: 181/184 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-01-28 07:46:10,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 95 flow [2023-01-28 07:46:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:46:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:46:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 350 transitions. [2023-01-28 07:46:10,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47554347826086957 [2023-01-28 07:46:10,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 350 transitions. [2023-01-28 07:46:10,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 350 transitions. [2023-01-28 07:46:10,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:46:10,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 350 transitions. [2023-01-28 07:46:10,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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 07:46:10,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:46:10,548 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:46:10,548 INFO L175 Difference]: Start difference. First operand has 28 places, 16 transitions, 43 flow. Second operand 4 states and 350 transitions. [2023-01-28 07:46:10,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 95 flow [2023-01-28 07:46:10,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 07:46:10,548 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-01-28 07:46:10,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-01-28 07:46:10,549 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-01-28 07:46:10,549 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-01-28 07:46:10,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 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 07:46:10,551 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:46:10,571 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 07:46:10,756 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 07:46:10,757 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:46:10,758 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:46:10,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 103 transitions, 214 flow [2023-01-28 07:46:10,776 INFO L130 PetriNetUnfolder]: 17/138 cut-off events. [2023-01-28 07:46:10,776 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:46:10,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 138 events. 17/138 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 315 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-01-28 07:46:10,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 103 transitions, 214 flow [2023-01-28 07:46:10,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 98 transitions, 201 flow [2023-01-28 07:46:10,777 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:46:10,778 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 98 transitions, 201 flow [2023-01-28 07:46:10,778 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 98 transitions, 201 flow [2023-01-28 07:46:10,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 98 transitions, 201 flow [2023-01-28 07:46:10,786 INFO L130 PetriNetUnfolder]: 16/133 cut-off events. [2023-01-28 07:46:10,786 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:46:10,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 133 events. 16/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 304 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-01-28 07:46:10,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 2460 [2023-01-28 07:46:12,425 INFO L134 LiptonReduction]: Checked pairs total: 3818 [2023-01-28 07:46:12,425 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-01-28 07:46:12,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:46:12,427 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;@384904fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:46:12,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:46:12,429 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2023-01-28 07:46:12,429 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:46:12,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:12,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:46:12,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:46:12,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:12,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1433307259, now seen corresponding path program 1 times [2023-01-28 07:46:12,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:12,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788990031] [2023-01-28 07:46:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:12,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:46:12,458 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:46:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:46:12,489 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:46:12,489 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:46:12,489 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:46:12,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:46:12,490 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:46:12,490 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:46:12,491 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:46:12,491 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:46:12,512 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:46:12,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:12,543 INFO L130 PetriNetUnfolder]: 31/229 cut-off events. [2023-01-28 07:46:12,544 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:46:12,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 229 events. 31/229 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 669 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-01-28 07:46:12,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:12,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:12,550 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:46:12,551 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:12,551 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:12,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:12,564 INFO L130 PetriNetUnfolder]: 31/229 cut-off events. [2023-01-28 07:46:12,564 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:46:12,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 229 events. 31/229 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 669 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-01-28 07:46:12,569 INFO L119 LiptonReduction]: Number of co-enabled transitions 7380 [2023-01-28 07:46:14,293 INFO L134 LiptonReduction]: Checked pairs total: 16879 [2023-01-28 07:46:14,293 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-28 07:46:14,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:46:14,295 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;@384904fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:46:14,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:46:14,297 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 07:46:14,297 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:46:14,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:14,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:46:14,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:46:14,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash 23040462, now seen corresponding path program 1 times [2023-01-28 07:46:14,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:14,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879505575] [2023-01-28 07:46:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:14,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:14,348 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 07:46:14,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:46:14,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879505575] [2023-01-28 07:46:14,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879505575] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:46:14,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:46:14,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:46:14,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223540003] [2023-01-28 07:46:14,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:46:14,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:46:14,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:46:14,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:46:14,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:46:14,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 232 [2023-01-28 07:46:14,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 07:46:14,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:46:14,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 232 [2023-01-28 07:46:14,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:46:14,621 INFO L130 PetriNetUnfolder]: 1490/2698 cut-off events. [2023-01-28 07:46:14,621 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:46:14,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5210 conditions, 2698 events. 1490/2698 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 16371 event pairs, 680 based on Foata normal form. 285/2685 useless extension candidates. Maximal degree in co-relation 535. Up to 2431 conditions per place. [2023-01-28 07:46:14,633 INFO L137 encePairwiseOnDemand]: 214/232 looper letters, 31 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-01-28 07:46:14,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 202 flow [2023-01-28 07:46:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:46:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:46:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-01-28 07:46:14,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474137931034483 [2023-01-28 07:46:14,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-01-28 07:46:14,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-01-28 07:46:14,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:46:14,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-01-28 07:46:14,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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 07:46:14,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 07:46:14,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 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 07:46:14,642 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 381 transitions. [2023-01-28 07:46:14,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 202 flow [2023-01-28 07:46:14,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:46:14,644 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 82 flow [2023-01-28 07:46:14,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, 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 07:46:14,647 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-01-28 07:46:14,647 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 82 flow [2023-01-28 07:46:14,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 07:46:14,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:14,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:46:14,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:46:14,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:46:14,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:14,649 INFO L85 PathProgramCache]: Analyzing trace with hash -251361210, now seen corresponding path program 1 times [2023-01-28 07:46:14,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:14,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961987041] [2023-01-28 07:46:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:14,710 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 07:46:14,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:46:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961987041] [2023-01-28 07:46:14,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961987041] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:46:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008269040] [2023-01-28 07:46:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:14,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:46:14,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:46:14,712 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 07:46:14,714 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 07:46:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:46:14,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:46:14,777 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 07:46:14,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:46:14,792 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 07:46:14,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008269040] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:46:14,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:46:14,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:46:14,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464531426] [2023-01-28 07:46:14,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:46:14,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:46:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:46:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:46:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:46:14,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 232 [2023-01-28 07:46:14,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 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 07:46:14,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:46:14,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 232 [2023-01-28 07:46:14,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:46:14,868 INFO L130 PetriNetUnfolder]: 376/688 cut-off events. [2023-01-28 07:46:14,868 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-01-28 07:46:14,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 688 events. 376/688 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3189 event pairs, 0 based on Foata normal form. 90/778 useless extension candidates. Maximal degree in co-relation 163. Up to 450 conditions per place. [2023-01-28 07:46:14,870 INFO L137 encePairwiseOnDemand]: 229/232 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-01-28 07:46:14,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 222 flow [2023-01-28 07:46:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:46:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:46:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 580 transitions. [2023-01-28 07:46:14,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-01-28 07:46:14,881 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 580 transitions. [2023-01-28 07:46:14,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 580 transitions. [2023-01-28 07:46:14,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:46:14,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 580 transitions. [2023-01-28 07:46:14,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 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 07:46:14,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 232.0) internal successors, (1392), 6 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 07:46:14,884 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 232.0) internal successors, (1392), 6 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 07:46:14,884 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 82 flow. Second operand 5 states and 580 transitions. [2023-01-28 07:46:14,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 222 flow [2023-01-28 07:46:14,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:46:14,885 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-01-28 07:46:14,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, 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 07:46:14,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -6 predicate places. [2023-01-28 07:46:14,886 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-01-28 07:46:14,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.14285714285714) internal successors, (757), 7 states have internal predecessors, (757), 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 07:46:14,887 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:46:14,908 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 07:46:15,092 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 07:46:15,092 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:46:15,092 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:46:15,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:15,103 INFO L130 PetriNetUnfolder]: 31/229 cut-off events. [2023-01-28 07:46:15,104 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:46:15,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 229 events. 31/229 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 669 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-01-28 07:46:15,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:15,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:15,105 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:46:15,105 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:15,106 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:15,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 135 transitions, 288 flow [2023-01-28 07:46:15,115 INFO L130 PetriNetUnfolder]: 31/229 cut-off events. [2023-01-28 07:46:15,116 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:46:15,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 229 events. 31/229 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 669 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-01-28 07:46:15,119 INFO L119 LiptonReduction]: Number of co-enabled transitions 7380 [2023-01-28 07:46:16,867 INFO L134 LiptonReduction]: Checked pairs total: 17008 [2023-01-28 07:46:16,867 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-28 07:46:16,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:46:16,869 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;@384904fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:46:16,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:46:16,872 INFO L130 PetriNetUnfolder]: 12/57 cut-off events. [2023-01-28 07:46:16,872 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 07:46:16,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:16,872 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:46:16,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:46:16,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1605213705, now seen corresponding path program 1 times [2023-01-28 07:46:16,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:16,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968065405] [2023-01-28 07:46:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:16,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:46:16,881 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:46:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:46:16,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:46:16,889 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:46:16,890 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:46:16,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:46:16,890 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:46:16,890 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:46:16,890 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:46:16,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:46:16,902 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 07:46:16,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:16,921 INFO L130 PetriNetUnfolder]: 50/351 cut-off events. [2023-01-28 07:46:16,921 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:46:16,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 351 events. 50/351 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1141 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 237. Up to 16 conditions per place. [2023-01-28 07:46:16,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:16,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:16,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:46:16,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:16,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:16,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:16,942 INFO L130 PetriNetUnfolder]: 50/351 cut-off events. [2023-01-28 07:46:16,942 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:46:16,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 351 events. 50/351 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1141 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 237. Up to 16 conditions per place. [2023-01-28 07:46:16,952 INFO L119 LiptonReduction]: Number of co-enabled transitions 14040 [2023-01-28 07:46:18,734 INFO L134 LiptonReduction]: Checked pairs total: 32860 [2023-01-28 07:46:18,735 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-01-28 07:46:18,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:46:18,736 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;@384904fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:46:18,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:46:18,738 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 07:46:18,738 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:46:18,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:18,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:46:18,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:46:18,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:18,739 INFO L85 PathProgramCache]: Analyzing trace with hash 35659422, now seen corresponding path program 1 times [2023-01-28 07:46:18,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:18,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59583058] [2023-01-28 07:46:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:18,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:18,756 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 07:46:18,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:46:18,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59583058] [2023-01-28 07:46:18,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59583058] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:46:18,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:46:18,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:46:18,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129092742] [2023-01-28 07:46:18,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:46:18,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:46:18,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:46:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:46:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:46:18,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 281 [2023-01-28 07:46:18,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 07:46:18,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:46:18,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 281 [2023-01-28 07:46:18,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:46:20,467 INFO L130 PetriNetUnfolder]: 17109/26606 cut-off events. [2023-01-28 07:46:20,468 INFO L131 PetriNetUnfolder]: For 901/901 co-relation queries the response was YES. [2023-01-28 07:46:20,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51561 conditions, 26606 events. 17109/26606 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 193148 event pairs, 11041 based on Foata normal form. 5470/29701 useless extension candidates. Maximal degree in co-relation 4686. Up to 24302 conditions per place. [2023-01-28 07:46:20,552 INFO L137 encePairwiseOnDemand]: 257/281 looper letters, 37 selfloop transitions, 2 changer transitions 11/63 dead transitions. [2023-01-28 07:46:20,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 252 flow [2023-01-28 07:46:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:46:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:46:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-01-28 07:46:20,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527876631079478 [2023-01-28 07:46:20,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-01-28 07:46:20,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-01-28 07:46:20,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:46:20,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-01-28 07:46:20,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 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 07:46:20,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 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 07:46:20,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 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 07:46:20,557 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 182 flow. Second operand 3 states and 466 transitions. [2023-01-28 07:46:20,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 252 flow [2023-01-28 07:46:20,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:46:20,561 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 113 flow [2023-01-28 07:46:20,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, 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 07:46:20,562 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-01-28 07:46:20,562 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 113 flow [2023-01-28 07:46:20,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 07:46:20,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:20,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:46:20,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:46:20,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:46:20,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1949252324, now seen corresponding path program 1 times [2023-01-28 07:46:20,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:20,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906062351] [2023-01-28 07:46:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:20,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:20,597 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 07:46:20,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:46:20,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906062351] [2023-01-28 07:46:20,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906062351] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:46:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461620176] [2023-01-28 07:46:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:20,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:46:20,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:46:20,599 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 07:46:20,629 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 07:46:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:46:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:46:20,686 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 07:46:20,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:46:20,701 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 07:46:20,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461620176] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:46:20,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:46:20,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:46:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733197685] [2023-01-28 07:46:20,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:46:20,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:46:20,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:46:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:46:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:46:20,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 281 [2023-01-28 07:46:20,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 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 07:46:20,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:46:20,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 281 [2023-01-28 07:46:20,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:46:21,148 INFO L130 PetriNetUnfolder]: 4342/6589 cut-off events. [2023-01-28 07:46:21,148 INFO L131 PetriNetUnfolder]: For 848/848 co-relation queries the response was YES. [2023-01-28 07:46:21,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13823 conditions, 6589 events. 4342/6589 cut-off events. For 848/848 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 38911 event pairs, 0 based on Foata normal form. 648/7236 useless extension candidates. Maximal degree in co-relation 1781. Up to 4192 conditions per place. [2023-01-28 07:46:21,163 INFO L137 encePairwiseOnDemand]: 278/281 looper letters, 0 selfloop transitions, 0 changer transitions 88/88 dead transitions. [2023-01-28 07:46:21,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 353 flow [2023-01-28 07:46:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:46:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:46:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 859 transitions. [2023-01-28 07:46:21,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094899169632265 [2023-01-28 07:46:21,165 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 859 transitions. [2023-01-28 07:46:21,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 859 transitions. [2023-01-28 07:46:21,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:46:21,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 859 transitions. [2023-01-28 07:46:21,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.16666666666666) internal successors, (859), 6 states have internal predecessors, (859), 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 07:46:21,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 281.0) internal successors, (1967), 7 states have internal predecessors, (1967), 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 07:46:21,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 281.0) internal successors, (1967), 7 states have internal predecessors, (1967), 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 07:46:21,169 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 113 flow. Second operand 6 states and 859 transitions. [2023-01-28 07:46:21,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 353 flow [2023-01-28 07:46:21,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 349 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:46:21,172 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-01-28 07:46:21,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, 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 07:46:21,173 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-01-28 07:46:21,173 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-01-28 07:46:21,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 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 07:46:21,174 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:46:21,186 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 07:46:21,378 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 07:46:21,379 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:46:21,379 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:46:21,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:21,433 INFO L130 PetriNetUnfolder]: 50/351 cut-off events. [2023-01-28 07:46:21,433 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:46:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 351 events. 50/351 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1141 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 237. Up to 16 conditions per place. [2023-01-28 07:46:21,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:21,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:21,439 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:46:21,439 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:21,439 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:21,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 167 transitions, 364 flow [2023-01-28 07:46:21,459 INFO L130 PetriNetUnfolder]: 50/351 cut-off events. [2023-01-28 07:46:21,459 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:46:21,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 351 events. 50/351 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1141 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 237. Up to 16 conditions per place. [2023-01-28 07:46:21,467 INFO L119 LiptonReduction]: Number of co-enabled transitions 14040 [2023-01-28 07:46:23,400 INFO L134 LiptonReduction]: Checked pairs total: 33095 [2023-01-28 07:46:23,400 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-01-28 07:46:23,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:46:23,405 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;@384904fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:46:23,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:46:23,409 INFO L130 PetriNetUnfolder]: 24/96 cut-off events. [2023-01-28 07:46:23,410 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 07:46:23,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:23,410 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:46:23,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:46:23,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:23,410 INFO L85 PathProgramCache]: Analyzing trace with hash 721541400, now seen corresponding path program 1 times [2023-01-28 07:46:23,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:23,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346675703] [2023-01-28 07:46:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:23,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:46:23,429 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:46:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:46:23,444 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:46:23,444 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:46:23,444 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:46:23,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:46:23,445 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:46:23,446 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:46:23,446 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:46:23,446 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:46:23,475 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 07:46:23,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 199 transitions, 442 flow [2023-01-28 07:46:23,517 INFO L130 PetriNetUnfolder]: 81/537 cut-off events. [2023-01-28 07:46:23,517 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:46:23,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 537 events. 81/537 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2013 event pairs, 6 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 371. Up to 32 conditions per place. [2023-01-28 07:46:23,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 199 transitions, 442 flow [2023-01-28 07:46:23,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 199 transitions, 442 flow [2023-01-28 07:46:23,525 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:46:23,525 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 199 transitions, 442 flow [2023-01-28 07:46:23,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 199 transitions, 442 flow [2023-01-28 07:46:23,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 199 transitions, 442 flow [2023-01-28 07:46:23,563 INFO L130 PetriNetUnfolder]: 81/537 cut-off events. [2023-01-28 07:46:23,564 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:46:23,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 537 events. 81/537 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2013 event pairs, 6 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 371. Up to 32 conditions per place. [2023-01-28 07:46:23,576 INFO L119 LiptonReduction]: Number of co-enabled transitions 22680 [2023-01-28 07:46:25,561 INFO L134 LiptonReduction]: Checked pairs total: 57152 [2023-01-28 07:46:25,561 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-01-28 07:46:25,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:46:25,563 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;@384904fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:46:25,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:46:25,564 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 07:46:25,564 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:46:25,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:25,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:46:25,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:46:25,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash 50311085, now seen corresponding path program 1 times [2023-01-28 07:46:25,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:25,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266298395] [2023-01-28 07:46:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:25,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:25,596 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 07:46:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:46:25,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266298395] [2023-01-28 07:46:25,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266298395] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:46:25,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:46:25,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:46:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923018058] [2023-01-28 07:46:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:46:25,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:46:25,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:46:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:46:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:46:25,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-01-28 07:46:25,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 07:46:25,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:46:25,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-01-28 07:46:25,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:46:43,403 INFO L130 PetriNetUnfolder]: 192316/270845 cut-off events. [2023-01-28 07:46:43,403 INFO L131 PetriNetUnfolder]: For 12142/12142 co-relation queries the response was YES. [2023-01-28 07:46:43,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530143 conditions, 270845 events. 192316/270845 cut-off events. For 12142/12142 co-relation queries the response was YES. Maximal size of possible extension queue 6436. Compared 2158486 event pairs, 141713 based on Foata normal form. 59754/310012 useless extension candidates. Maximal degree in co-relation 50857. Up to 252413 conditions per place. [2023-01-28 07:46:44,667 INFO L137 encePairwiseOnDemand]: 300/330 looper letters, 45 selfloop transitions, 2 changer transitions 12/76 dead transitions. [2023-01-28 07:46:44,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 310 flow [2023-01-28 07:46:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:46:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:46:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-01-28 07:46:44,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585858585858586 [2023-01-28 07:46:44,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-01-28 07:46:44,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-01-28 07:46:44,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:46:44,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-01-28 07:46:44,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 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 07:46:44,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 07:46:44,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 07:46:44,673 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 553 transitions. [2023-01-28 07:46:44,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 310 flow [2023-01-28 07:46:44,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:46:44,677 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 146 flow [2023-01-28 07:46:44,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, 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 07:46:44,678 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-01-28 07:46:44,678 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 146 flow [2023-01-28 07:46:44,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 07:46:44,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:44,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:46:44,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:46:44,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:46:44,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:44,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1882376404, now seen corresponding path program 1 times [2023-01-28 07:46:44,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:44,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245692123] [2023-01-28 07:46:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:44,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:44,712 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 07:46:44,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:46:44,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245692123] [2023-01-28 07:46:44,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245692123] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:46:44,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167772789] [2023-01-28 07:46:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:44,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:46:44,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:46:44,738 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 07:46:44,740 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 07:46:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:44,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:46:44,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:46:44,807 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 07:46:44,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:46:44,823 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 07:46:44,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167772789] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:46:44,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:46:44,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:46:44,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571150924] [2023-01-28 07:46:44,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:46:44,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:46:44,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:46:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:46:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:46:44,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-01-28 07:46:44,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 156.14285714285714) internal successors, (1093), 7 states have internal predecessors, (1093), 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 07:46:44,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:46:44,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-01-28 07:46:44,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:46:50,981 INFO L130 PetriNetUnfolder]: 79435/110674 cut-off events. [2023-01-28 07:46:50,981 INFO L131 PetriNetUnfolder]: For 13120/13120 co-relation queries the response was YES. [2023-01-28 07:46:51,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227050 conditions, 110674 events. 79435/110674 cut-off events. For 13120/13120 co-relation queries the response was YES. Maximal size of possible extension queue 3067. Compared 798735 event pairs, 14400 based on Foata normal form. 584/110897 useless extension candidates. Maximal degree in co-relation 29138. Up to 61372 conditions per place. [2023-01-28 07:46:51,490 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 111 selfloop transitions, 5 changer transitions 1/134 dead transitions. [2023-01-28 07:46:51,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 134 transitions, 540 flow [2023-01-28 07:46:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:46:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:46:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1044 transitions. [2023-01-28 07:46:51,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2023-01-28 07:46:51,493 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1044 transitions. [2023-01-28 07:46:51,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1044 transitions. [2023-01-28 07:46:51,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:46:51,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1044 transitions. [2023-01-28 07:46:51,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 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 07:46:51,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 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 07:46:51,497 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 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 07:46:51,498 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 146 flow. Second operand 6 states and 1044 transitions. [2023-01-28 07:46:51,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 134 transitions, 540 flow [2023-01-28 07:46:51,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 134 transitions, 532 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 07:46:51,501 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-01-28 07:46:51,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, 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 07:46:51,502 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-01-28 07:46:51,502 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-01-28 07:46:51,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.14285714285714) internal successors, (1093), 7 states have internal predecessors, (1093), 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 07:46:51,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:46:51,503 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:46:51,507 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 07:46:51,706 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 07:46:51,707 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:46:51,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:46:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1739113731, now seen corresponding path program 1 times [2023-01-28 07:46:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:46:51,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787419464] [2023-01-28 07:46:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:46:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:46:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:46:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 07:46:51,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:46:51,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787419464] [2023-01-28 07:46:51,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787419464] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:46:51,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:46:51,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:46:51,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183750079] [2023-01-28 07:46:51,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:46:51,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:46:51,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:46:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:46:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:46:51,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 330 [2023-01-28 07:46:51,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 07:46:51,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:46:51,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 330 [2023-01-28 07:46:51,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:47:02,615 INFO L130 PetriNetUnfolder]: 142344/185902 cut-off events. [2023-01-28 07:47:02,615 INFO L131 PetriNetUnfolder]: For 170818/170818 co-relation queries the response was YES. [2023-01-28 07:47:03,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449274 conditions, 185902 events. 142344/185902 cut-off events. For 170818/170818 co-relation queries the response was YES. Maximal size of possible extension queue 4480. Compared 1184111 event pairs, 80842 based on Foata normal form. 81/185769 useless extension candidates. Maximal degree in co-relation 357762. Up to 184462 conditions per place. [2023-01-28 07:47:04,006 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 64 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-01-28 07:47:04,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 79 transitions, 400 flow [2023-01-28 07:47:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:47:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:47:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-01-28 07:47:04,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49797979797979797 [2023-01-28 07:47:04,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-01-28 07:47:04,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-01-28 07:47:04,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:47:04,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-01-28 07:47:04,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 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 07:47:04,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 07:47:04,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 07:47:04,022 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 3 states and 493 transitions. [2023-01-28 07:47:04,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 79 transitions, 400 flow [2023-01-28 07:47:04,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 380 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 07:47:04,055 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 194 flow [2023-01-28 07:47:04,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-01-28 07:47:04,056 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-01-28 07:47:04,057 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 194 flow [2023-01-28 07:47:04,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 07:47:04,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:47:04,057 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:47:04,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 07:47:04,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:47:04,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:47:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1967241273, now seen corresponding path program 1 times [2023-01-28 07:47:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:47:04,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041254237] [2023-01-28 07:47:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:47:04,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:47:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:47:04,143 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 07:47:04,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:47:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041254237] [2023-01-28 07:47:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041254237] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:47:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600187673] [2023-01-28 07:47:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:47:04,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:47:04,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:47:04,145 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 07:47:04,147 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 07:47:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:47:04,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 07:47:04,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:47:04,263 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 07:47:04,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:47:04,320 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 07:47:04,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600187673] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:47:04,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:47:04,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 07:47:04,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417397534] [2023-01-28 07:47:04,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:47:04,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 07:47:04,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:47:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 07:47:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 07:47:04,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 330 [2023-01-28 07:47:04,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 194 flow. Second operand has 13 states, 13 states have (on average 156.84615384615384) internal successors, (2039), 13 states have internal predecessors, (2039), 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 07:47:04,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:47:04,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 330 [2023-01-28 07:47:04,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:47:08,029 INFO L130 PetriNetUnfolder]: 37738/54641 cut-off events. [2023-01-28 07:47:08,029 INFO L131 PetriNetUnfolder]: For 66593/66593 co-relation queries the response was YES. [2023-01-28 07:47:08,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118509 conditions, 54641 events. 37738/54641 cut-off events. For 66593/66593 co-relation queries the response was YES. Maximal size of possible extension queue 1631. Compared 391751 event pairs, 4596 based on Foata normal form. 5562/59668 useless extension candidates. Maximal degree in co-relation 79622. Up to 24708 conditions per place. [2023-01-28 07:47:08,248 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 0 selfloop transitions, 0 changer transitions 138/138 dead transitions. [2023-01-28 07:47:08,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 138 transitions, 602 flow [2023-01-28 07:47:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 07:47:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 07:47:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1193 transitions. [2023-01-28 07:47:08,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164502164502165 [2023-01-28 07:47:08,250 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1193 transitions. [2023-01-28 07:47:08,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1193 transitions. [2023-01-28 07:47:08,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:47:08,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1193 transitions. [2023-01-28 07:47:08,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 170.42857142857142) internal successors, (1193), 7 states have internal predecessors, (1193), 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 07:47:08,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 330.0) internal successors, (2640), 8 states have internal predecessors, (2640), 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 07:47:08,450 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 330.0) internal successors, (2640), 8 states have internal predecessors, (2640), 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 07:47:08,450 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 194 flow. Second operand 7 states and 1193 transitions. [2023-01-28 07:47:08,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 138 transitions, 602 flow [2023-01-28 07:47:08,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 138 transitions, 585 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-01-28 07:47:08,461 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-01-28 07:47:08,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-01-28 07:47:08,462 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-01-28 07:47:08,462 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-01-28 07:47:08,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.84615384615384) internal successors, (2039), 13 states have internal predecessors, (2039), 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 07:47:08,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:47:08,489 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 07:47:08,685 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,SelfDestructingSolverStorable12 [2023-01-28 07:47:08,685 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-28 07:47:08,686 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:47:08,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 199 transitions, 442 flow [2023-01-28 07:47:08,718 INFO L130 PetriNetUnfolder]: 81/537 cut-off events. [2023-01-28 07:47:08,719 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:47:08,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 537 events. 81/537 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2013 event pairs, 6 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 371. Up to 32 conditions per place. [2023-01-28 07:47:08,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 199 transitions, 442 flow [2023-01-28 07:47:08,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 199 transitions, 442 flow [2023-01-28 07:47:08,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:47:08,724 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 199 transitions, 442 flow [2023-01-28 07:47:08,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 199 transitions, 442 flow [2023-01-28 07:47:08,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 199 transitions, 442 flow [2023-01-28 07:47:08,755 INFO L130 PetriNetUnfolder]: 81/537 cut-off events. [2023-01-28 07:47:08,755 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:47:08,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 537 events. 81/537 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2013 event pairs, 6 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 371. Up to 32 conditions per place. [2023-01-28 07:47:08,765 INFO L119 LiptonReduction]: Number of co-enabled transitions 22680 [2023-01-28 07:47:10,592 INFO L134 LiptonReduction]: Checked pairs total: 56755 [2023-01-28 07:47:10,592 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-01-28 07:47:10,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:47:10,593 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;@384904fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:47:10,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:47:10,599 INFO L130 PetriNetUnfolder]: 33/136 cut-off events. [2023-01-28 07:47:10,599 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 07:47:10,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:47:10,599 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 07:47:10,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:47:10,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:47:10,600 INFO L85 PathProgramCache]: Analyzing trace with hash -780805335, now seen corresponding path program 1 times [2023-01-28 07:47:10,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:47:10,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789887380] [2023-01-28 07:47:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:47:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:47:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:47:10,617 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:47:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:47:10,637 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:47:10,637 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:47:10,637 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:47:10,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 07:47:10,637 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:47:10,640 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:47:10,640 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:47:10,640 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 07:47:10,659 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-28 07:47:10,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 231 transitions, 522 flow [2023-01-28 07:47:10,722 INFO L130 PetriNetUnfolder]: 140/855 cut-off events. [2023-01-28 07:47:10,722 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:47:10,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 855 events. 140/855 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3770 event pairs, 23 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 582. Up to 80 conditions per place. [2023-01-28 07:47:10,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 231 transitions, 522 flow [2023-01-28 07:47:10,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 231 transitions, 522 flow [2023-01-28 07:47:10,734 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:47:10,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 231 transitions, 522 flow [2023-01-28 07:47:10,734 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 231 transitions, 522 flow [2023-01-28 07:47:10,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 231 transitions, 522 flow [2023-01-28 07:47:10,797 INFO L130 PetriNetUnfolder]: 140/855 cut-off events. [2023-01-28 07:47:10,797 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:47:10,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 855 events. 140/855 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3770 event pairs, 23 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 582. Up to 80 conditions per place. [2023-01-28 07:47:10,821 INFO L119 LiptonReduction]: Number of co-enabled transitions 33300 [2023-01-28 07:47:12,672 INFO L134 LiptonReduction]: Checked pairs total: 85320 [2023-01-28 07:47:12,672 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-01-28 07:47:12,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:47:12,673 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;@384904fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:47:12,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:47:12,674 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 07:47:12,674 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:47:12,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:47:12,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:47:12,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:47:12,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:47:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 66869503, now seen corresponding path program 1 times [2023-01-28 07:47:12,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:47:12,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929491739] [2023-01-28 07:47:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:47:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:47:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:47:12,688 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 07:47:12,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:47:12,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929491739] [2023-01-28 07:47:12,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929491739] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:47:12,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:47:12,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:47:12,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506084913] [2023-01-28 07:47:12,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:47:12,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:47:12,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:47:12,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:47:12,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:47:12,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 377 [2023-01-28 07:47:12,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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 07:47:12,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:47:12,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 377 [2023-01-28 07:47:12,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand