/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:13:27,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:13:27,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:13:27,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:13:27,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:13:27,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:13:27,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:13:27,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:13:27,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:13:27,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:13:27,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:13:27,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:13:27,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:13:27,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:13:27,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:13:27,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:13:27,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:13:27,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:13:27,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:13:27,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:13:27,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:13:27,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:13:27,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:13:27,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:13:27,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:13:27,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:13:27,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:13:27,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:13:27,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 19:13:27,376 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:13:27,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:13:27,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:13:27,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:13:27,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:13:27,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:13:27,378 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:13:27,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:13:27,378 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:13:27,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:13:27,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:13:27,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:13:27,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:13:27,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:13:27,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:13:27,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:13:27,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:13:27,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:13:27,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:13:27,380 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:13:27,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:13:27,380 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:13:27,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:13:27,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:13:27,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:13:27,570 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:13:27,577 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:13:27,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-01-27 19:13:28,540 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:13:28,750 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:13:28,751 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-01-27 19:13:28,760 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f368176c/8929362a46194768a8b3ede8c560c5a4/FLAGf7aff2ca3 [2023-01-27 19:13:28,775 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f368176c/8929362a46194768a8b3ede8c560c5a4 [2023-01-27 19:13:28,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:13:28,778 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:13:28,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:13:28,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:13:28,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:13:28,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:13:28" (1/1) ... [2023-01-27 19:13:28,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3137e8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:28, skipping insertion in model container [2023-01-27 19:13:28,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:13:28" (1/1) ... [2023-01-27 19:13:28,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:13:28,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:13:28,981 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_22-deref_read_racefree.i[30176,30189] [2023-01-27 19:13:28,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:13:29,011 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:13:29,069 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_22-deref_read_racefree.i[30176,30189] [2023-01-27 19:13:29,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:13:29,108 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:13:29,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29 WrapperNode [2023-01-27 19:13:29,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:13:29,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:13:29,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:13:29,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:13:29,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,151 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-01-27 19:13:29,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:13:29,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:13:29,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:13:29,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:13:29,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:13:29,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:13:29,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:13:29,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:13:29,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (1/1) ... [2023-01-27 19:13:29,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:13:29,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:13:29,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 19:13:29,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 19:13:29,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:13:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:13:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:13:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:13:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:13:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:13:29,250 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:13:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:13:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:13:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:13:29,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:13:29,252 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:13:29,400 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:13:29,402 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:13:29,596 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:13:29,601 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:13:29,602 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-01-27 19:13:29,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:13:29 BoogieIcfgContainer [2023-01-27 19:13:29,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:13:29,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:13:29,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:13:29,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:13:29,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:13:28" (1/3) ... [2023-01-27 19:13:29,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e2524a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:13:29, skipping insertion in model container [2023-01-27 19:13:29,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:29" (2/3) ... [2023-01-27 19:13:29,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e2524a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:13:29, skipping insertion in model container [2023-01-27 19:13:29,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:13:29" (3/3) ... [2023-01-27 19:13:29,608 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-01-27 19:13:29,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:13:29,619 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:13:29,619 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:13:29,652 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:13:29,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-01-27 19:13:29,716 INFO L130 PetriNetUnfolder]: 14/131 cut-off events. [2023-01-27 19:13:29,717 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:29,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-01-27 19:13:29,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 100 transitions, 205 flow [2023-01-27 19:13:29,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 100 transitions, 205 flow [2023-01-27 19:13:29,740 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:13:29,746 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 100 transitions, 205 flow [2023-01-27 19:13:29,748 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 100 transitions, 205 flow [2023-01-27 19:13:29,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-01-27 19:13:29,766 INFO L130 PetriNetUnfolder]: 14/131 cut-off events. [2023-01-27 19:13:29,767 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:29,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-01-27 19:13:29,768 INFO L119 LiptonReduction]: Number of co-enabled transitions 2368 [2023-01-27 19:13:31,899 INFO L134 LiptonReduction]: Checked pairs total: 4764 [2023-01-27 19:13:31,899 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-01-27 19:13:31,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:13:31,912 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;@6af0b483, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:13:31,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:13:31,914 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:13:31,915 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:31,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:31,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:13:31,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:31,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:31,918 INFO L85 PathProgramCache]: Analyzing trace with hash 11987027, now seen corresponding path program 1 times [2023-01-27 19:13:31,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:31,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76115162] [2023-01-27 19:13:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:31,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:32,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:32,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76115162] [2023-01-27 19:13:32,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76115162] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:13:32,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:13:32,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:13:32,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691152519] [2023-01-27 19:13:32,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:13:32,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:13:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:13:32,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:13:32,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2023-01-27 19:13:32,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:32,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:32,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2023-01-27 19:13:32,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:32,237 INFO L130 PetriNetUnfolder]: 72/176 cut-off events. [2023-01-27 19:13:32,237 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:32,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 176 events. 72/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 562 event pairs, 56 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 332. Up to 153 conditions per place. [2023-01-27 19:13:32,240 INFO L137 encePairwiseOnDemand]: 173/184 looper letters, 24 selfloop transitions, 2 changer transitions 3/32 dead transitions. [2023-01-27 19:13:32,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 127 flow [2023-01-27 19:13:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:13:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:13:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-01-27 19:13:32,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519927536231884 [2023-01-27 19:13:32,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-01-27 19:13:32,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-01-27 19:13:32,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:32,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-01-27 19:13:32,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:32,272 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) [2023-01-27 19:13:32,272 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) [2023-01-27 19:13:32,274 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 287 transitions. [2023-01-27 19:13:32,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 127 flow [2023-01-27 19:13:32,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:13:32,278 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 51 flow [2023-01-27 19:13:32,279 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=51, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-01-27 19:13:32,284 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-01-27 19:13:32,284 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 51 flow [2023-01-27 19:13:32,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:32,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:32,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:13:32,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:13:32,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:32,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1370191057, now seen corresponding path program 1 times [2023-01-27 19:13:32,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:32,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279918496] [2023-01-27 19:13:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:32,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:32,322 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:13:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:32,363 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:13:32,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:13:32,364 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:13:32,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:13:32,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:13:32,366 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:13:32,369 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:13:32,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:13:32,386 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:13:32,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-01-27 19:13:32,416 INFO L130 PetriNetUnfolder]: 24/200 cut-off events. [2023-01-27 19:13:32,417 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:13:32,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-01-27 19:13:32,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 133 transitions, 278 flow [2023-01-27 19:13:32,421 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 278 flow [2023-01-27 19:13:32,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:13:32,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 278 flow [2023-01-27 19:13:32,421 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 278 flow [2023-01-27 19:13:32,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-01-27 19:13:32,435 INFO L130 PetriNetUnfolder]: 24/200 cut-off events. [2023-01-27 19:13:32,435 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:13:32,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-01-27 19:13:32,439 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2023-01-27 19:13:34,481 INFO L134 LiptonReduction]: Checked pairs total: 13795 [2023-01-27 19:13:34,481 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-01-27 19:13:34,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:13:34,487 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;@6af0b483, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:13:34,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:13:34,489 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:13:34,489 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:34,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:34,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:13:34,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:34,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:34,489 INFO L85 PathProgramCache]: Analyzing trace with hash 20270096, now seen corresponding path program 1 times [2023-01-27 19:13:34,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:34,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94676794] [2023-01-27 19:13:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:34,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:34,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:34,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94676794] [2023-01-27 19:13:34,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94676794] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:13:34,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:13:34,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:13:34,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939573054] [2023-01-27 19:13:34,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:13:34,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:13:34,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:34,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:13:34,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:13:34,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 236 [2023-01-27 19:13:34,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:34,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:34,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 236 [2023-01-27 19:13:34,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:34,693 INFO L130 PetriNetUnfolder]: 1441/2556 cut-off events. [2023-01-27 19:13:34,694 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-27 19:13:34,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4955 conditions, 2556 events. 1441/2556 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 14565 event pairs, 640 based on Foata normal form. 360/2676 useless extension candidates. Maximal degree in co-relation 472. Up to 2332 conditions per place. [2023-01-27 19:13:34,702 INFO L137 encePairwiseOnDemand]: 219/236 looper letters, 34 selfloop transitions, 2 changer transitions 3/46 dead transitions. [2023-01-27 19:13:34,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 182 flow [2023-01-27 19:13:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:13:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:13:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-01-27 19:13:34,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538135593220339 [2023-01-27 19:13:34,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-01-27 19:13:34,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-01-27 19:13:34,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:34,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-01-27 19:13:34,706 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) [2023-01-27 19:13:34,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:34,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:34,708 INFO L175 Difference]: Start difference. First operand has 40 places, 49 transitions, 110 flow. Second operand 3 states and 381 transitions. [2023-01-27 19:13:34,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 182 flow [2023-01-27 19:13:34,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 19:13:34,709 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 86 flow [2023-01-27 19:13:34,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-01-27 19:13:34,710 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-01-27 19:13:34,710 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 86 flow [2023-01-27 19:13:34,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:34,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:34,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:13:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:13:34,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:34,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash -273928485, now seen corresponding path program 1 times [2023-01-27 19:13:34,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:34,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398779874] [2023-01-27 19:13:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:34,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398779874] [2023-01-27 19:13:34,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398779874] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:13:34,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643512369] [2023-01-27 19:13:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:34,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:13:34,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:13:34,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:13:34,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:13:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:34,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:13:34,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:13:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:34,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:13:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:34,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643512369] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:13:34,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:13:34,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:13:34,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992286254] [2023-01-27 19:13:34,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:13:34,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:13:34,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:34,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:13:34,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:13:34,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 236 [2023-01-27 19:13:34,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:34,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:34,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 236 [2023-01-27 19:13:34,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:35,054 INFO L130 PetriNetUnfolder]: 421/856 cut-off events. [2023-01-27 19:13:35,055 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:13:35,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 856 events. 421/856 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4401 event pairs, 0 based on Foata normal form. 100/956 useless extension candidates. Maximal degree in co-relation 182. Up to 502 conditions per place. [2023-01-27 19:13:35,058 INFO L137 encePairwiseOnDemand]: 233/236 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-01-27 19:13:35,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 236 flow [2023-01-27 19:13:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:13:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:13:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 588 transitions. [2023-01-27 19:13:35,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49830508474576274 [2023-01-27 19:13:35,061 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 588 transitions. [2023-01-27 19:13:35,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 588 transitions. [2023-01-27 19:13:35,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:35,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 588 transitions. [2023-01-27 19:13:35,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:35,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:35,068 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:35,069 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 86 flow. Second operand 5 states and 588 transitions. [2023-01-27 19:13:35,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 236 flow [2023-01-27 19:13:35,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:13:35,071 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-01-27 19:13:35,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-01-27 19:13:35,073 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-01-27 19:13:35,073 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-01-27 19:13:35,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:35,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:35,073 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:13:35,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 19:13:35,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:13:35,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:35,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash -804893670, now seen corresponding path program 1 times [2023-01-27 19:13:35,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:35,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301061514] [2023-01-27 19:13:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:35,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:35,296 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:13:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:35,312 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:13:35,312 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:13:35,312 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:13:35,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:13:35,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:13:35,312 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:13:35,313 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:13:35,313 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:13:35,329 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:13:35,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 353 flow [2023-01-27 19:13:35,362 INFO L130 PetriNetUnfolder]: 34/269 cut-off events. [2023-01-27 19:13:35,363 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 19:13:35,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 269 events. 34/269 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-01-27 19:13:35,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 166 transitions, 353 flow [2023-01-27 19:13:35,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 166 transitions, 353 flow [2023-01-27 19:13:35,365 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:13:35,365 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 166 transitions, 353 flow [2023-01-27 19:13:35,366 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 166 transitions, 353 flow [2023-01-27 19:13:35,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 353 flow [2023-01-27 19:13:35,385 INFO L130 PetriNetUnfolder]: 34/269 cut-off events. [2023-01-27 19:13:35,386 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 19:13:35,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 269 events. 34/269 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-01-27 19:13:35,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2023-01-27 19:13:37,605 INFO L134 LiptonReduction]: Checked pairs total: 31714 [2023-01-27 19:13:37,605 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-01-27 19:13:37,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:13:37,607 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;@6af0b483, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:13:37,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:13:37,608 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:13:37,608 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:37,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:37,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:13:37,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:37,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash 30179040, now seen corresponding path program 1 times [2023-01-27 19:13:37,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:37,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424909910] [2023-01-27 19:13:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:37,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:37,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424909910] [2023-01-27 19:13:37,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424909910] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:13:37,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:13:37,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:13:37,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10165173] [2023-01-27 19:13:37,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:13:37,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:13:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:37,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:13:37,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:13:37,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 289 [2023-01-27 19:13:37,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 67 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:37,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:37,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 289 [2023-01-27 19:13:37,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:39,337 INFO L130 PetriNetUnfolder]: 20233/30021 cut-off events. [2023-01-27 19:13:39,337 INFO L131 PetriNetUnfolder]: For 597/597 co-relation queries the response was YES. [2023-01-27 19:13:39,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58876 conditions, 30021 events. 20233/30021 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 198030 event pairs, 19318 based on Foata normal form. 5058/33014 useless extension candidates. Maximal degree in co-relation 22879. Up to 28406 conditions per place. [2023-01-27 19:13:39,447 INFO L137 encePairwiseOnDemand]: 266/289 looper letters, 42 selfloop transitions, 2 changer transitions 3/57 dead transitions. [2023-01-27 19:13:39,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 57 transitions, 229 flow [2023-01-27 19:13:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:13:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:13:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-01-27 19:13:39,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5455594002306805 [2023-01-27 19:13:39,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-01-27 19:13:39,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-01-27 19:13:39,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:39,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-01-27 19:13:39,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:39,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:39,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:39,452 INFO L175 Difference]: Start difference. First operand has 54 places, 67 transitions, 155 flow. Second operand 3 states and 473 transitions. [2023-01-27 19:13:39,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 57 transitions, 229 flow [2023-01-27 19:13:39,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 223 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-27 19:13:39,455 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 115 flow [2023-01-27 19:13:39,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-01-27 19:13:39,457 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-01-27 19:13:39,457 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 115 flow [2023-01-27 19:13:39,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:39,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:39,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:13:39,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:13:39,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:39,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1655288508, now seen corresponding path program 1 times [2023-01-27 19:13:39,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:39,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652116154] [2023-01-27 19:13:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:39,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:39,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652116154] [2023-01-27 19:13:39,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652116154] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:13:39,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767490891] [2023-01-27 19:13:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:39,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:13:39,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:13:39,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:13:39,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:13:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:39,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:13:39,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:13:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:39,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:13:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:39,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767490891] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:13:39,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:13:39,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:13:39,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024271083] [2023-01-27 19:13:39,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:13:39,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:13:39,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:39,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:13:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:13:39,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 289 [2023-01-27 19:13:39,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:39,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:39,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 289 [2023-01-27 19:13:39,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:40,261 INFO L130 PetriNetUnfolder]: 6205/10135 cut-off events. [2023-01-27 19:13:40,261 INFO L131 PetriNetUnfolder]: For 1008/1008 co-relation queries the response was YES. [2023-01-27 19:13:40,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21104 conditions, 10135 events. 6205/10135 cut-off events. For 1008/1008 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 67601 event pairs, 0 based on Foata normal form. 909/11043 useless extension candidates. Maximal degree in co-relation 2406. Up to 5958 conditions per place. [2023-01-27 19:13:40,313 INFO L137 encePairwiseOnDemand]: 286/289 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-01-27 19:13:40,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 389 flow [2023-01-27 19:13:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:13:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:13:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 887 transitions. [2023-01-27 19:13:40,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115340253748558 [2023-01-27 19:13:40,316 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 887 transitions. [2023-01-27 19:13:40,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 887 transitions. [2023-01-27 19:13:40,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:40,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 887 transitions. [2023-01-27 19:13:40,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.83333333333334) internal successors, (887), 6 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:40,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:40,321 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 289.0) internal successors, (2023), 7 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:40,322 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 115 flow. Second operand 6 states and 887 transitions. [2023-01-27 19:13:40,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 389 flow [2023-01-27 19:13:40,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:13:40,324 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-01-27 19:13:40,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-01-27 19:13:40,325 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-01-27 19:13:40,326 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-01-27 19:13:40,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:40,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:40,327 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:13:40,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 19:13:40,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-01-27 19:13:40,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:40,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1022284815, now seen corresponding path program 1 times [2023-01-27 19:13:40,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:40,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691533329] [2023-01-27 19:13:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:40,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:40,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:13:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:40,572 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:13:40,572 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:13:40,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:13:40,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:13:40,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:13:40,573 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:13:40,574 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:13:40,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:13:40,634 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:13:40,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 430 flow [2023-01-27 19:13:40,663 INFO L130 PetriNetUnfolder]: 44/338 cut-off events. [2023-01-27 19:13:40,663 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 19:13:40,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 338 events. 44/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1072 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 277. Up to 10 conditions per place. [2023-01-27 19:13:40,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 199 transitions, 430 flow [2023-01-27 19:13:40,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 199 transitions, 430 flow [2023-01-27 19:13:40,666 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:13:40,666 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 199 transitions, 430 flow [2023-01-27 19:13:40,666 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 199 transitions, 430 flow [2023-01-27 19:13:40,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 430 flow [2023-01-27 19:13:40,690 INFO L130 PetriNetUnfolder]: 44/338 cut-off events. [2023-01-27 19:13:40,690 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 19:13:40,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 338 events. 44/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1072 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 277. Up to 10 conditions per place. [2023-01-27 19:13:40,701 INFO L119 LiptonReduction]: Number of co-enabled transitions 22144 [2023-01-27 19:13:43,094 INFO L134 LiptonReduction]: Checked pairs total: 56439 [2023-01-27 19:13:43,094 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-01-27 19:13:43,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:13:43,095 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;@6af0b483, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:13:43,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:13:43,097 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:13:43,097 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:43,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:43,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:13:43,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:43,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash 41725736, now seen corresponding path program 1 times [2023-01-27 19:13:43,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:43,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112348084] [2023-01-27 19:13:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:43,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:43,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:43,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112348084] [2023-01-27 19:13:43,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112348084] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:13:43,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:13:43,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:13:43,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664732114] [2023-01-27 19:13:43,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:13:43,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:13:43,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:13:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:13:43,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-01-27 19:13:43,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 85 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:43,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:43,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-01-27 19:13:43,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:14:15,726 INFO L130 PetriNetUnfolder]: 452675/587947 cut-off events. [2023-01-27 19:14:15,727 INFO L131 PetriNetUnfolder]: For 13849/13849 co-relation queries the response was YES. [2023-01-27 19:14:16,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179668 conditions, 587947 events. 452675/587947 cut-off events. For 13849/13849 co-relation queries the response was YES. Maximal size of possible extension queue 10218. Compared 3861958 event pairs, 439492 based on Foata normal form. 61092/618582 useless extension candidates. Maximal degree in co-relation 94282. Up to 584426 conditions per place. [2023-01-27 19:14:17,911 INFO L137 encePairwiseOnDemand]: 313/342 looper letters, 58 selfloop transitions, 2 changer transitions 3/70 dead transitions. [2023-01-27 19:14:17,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 298 flow [2023-01-27 19:14:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:14:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:14:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-01-27 19:14:17,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584795321637427 [2023-01-27 19:14:17,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-01-27 19:14:17,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-01-27 19:14:17,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:14:17,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-01-27 19:14:17,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:17,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:17,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:17,916 INFO L175 Difference]: Start difference. First operand has 68 places, 85 transitions, 202 flow. Second operand 3 states and 573 transitions. [2023-01-27 19:14:17,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 298 flow [2023-01-27 19:14:17,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 286 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-01-27 19:14:17,926 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 144 flow [2023-01-27 19:14:17,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-01-27 19:14:17,927 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-27 19:14:17,927 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 144 flow [2023-01-27 19:14:17,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:17,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:17,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:17,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:14:17,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:17,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash -848622150, now seen corresponding path program 1 times [2023-01-27 19:14:17,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:17,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858789778] [2023-01-27 19:14:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:17,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:17,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:17,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858789778] [2023-01-27 19:14:17,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858789778] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:14:17,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632308991] [2023-01-27 19:14:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:17,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:14:17,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:14:17,951 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:14:17,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:14:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:14:18,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:14:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:18,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:14:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:18,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632308991] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:14:18,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:14:18,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-27 19:14:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45737852] [2023-01-27 19:14:18,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:14:18,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:14:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:14:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 19:14:18,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-01-27 19:14:18,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:18,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:18,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-01-27 19:14:18,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:14:37,211 INFO L130 PetriNetUnfolder]: 286856/375791 cut-off events. [2023-01-27 19:14:37,211 INFO L131 PetriNetUnfolder]: For 15970/15970 co-relation queries the response was YES. [2023-01-27 19:14:37,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779670 conditions, 375791 events. 286856/375791 cut-off events. For 15970/15970 co-relation queries the response was YES. Maximal size of possible extension queue 7018. Compared 2501396 event pairs, 12100 based on Foata normal form. 1330/377120 useless extension candidates. Maximal degree in co-relation 79638. Up to 246357 conditions per place. [2023-01-27 19:14:39,147 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 146 selfloop transitions, 6 changer transitions 0/159 dead transitions. [2023-01-27 19:14:39,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 159 transitions, 656 flow [2023-01-27 19:14:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:14:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:14:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1109 transitions. [2023-01-27 19:14:39,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404483430799221 [2023-01-27 19:14:39,150 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1109 transitions. [2023-01-27 19:14:39,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1109 transitions. [2023-01-27 19:14:39,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:14:39,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1109 transitions. [2023-01-27 19:14:39,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.83333333333334) internal successors, (1109), 6 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:39,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:39,154 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:39,154 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 144 flow. Second operand 6 states and 1109 transitions. [2023-01-27 19:14:39,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 159 transitions, 656 flow [2023-01-27 19:14:39,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 159 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:14:39,158 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-01-27 19:14:39,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-27 19:14:39,158 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 8 predicate places. [2023-01-27 19:14:39,158 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-01-27 19:14:39,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:39,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:39,159 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:39,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 19:14:39,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:14:39,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:39,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1232132437, now seen corresponding path program 1 times [2023-01-27 19:14:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:39,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987146361] [2023-01-27 19:14:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:39,380 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:14:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:39,402 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:14:39,402 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:14:39,402 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:14:39,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:14:39,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:14:39,402 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:14:39,403 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:14:39,403 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:14:39,419 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:14:39,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 232 transitions, 509 flow [2023-01-27 19:14:39,449 INFO L130 PetriNetUnfolder]: 54/407 cut-off events. [2023-01-27 19:14:39,449 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 19:14:39,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 407 events. 54/407 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1325 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 351. Up to 12 conditions per place. [2023-01-27 19:14:39,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 232 transitions, 509 flow [2023-01-27 19:14:39,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 232 transitions, 509 flow [2023-01-27 19:14:39,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:14:39,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 232 transitions, 509 flow [2023-01-27 19:14:39,454 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 232 transitions, 509 flow [2023-01-27 19:14:39,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 232 transitions, 509 flow [2023-01-27 19:14:39,483 INFO L130 PetriNetUnfolder]: 54/407 cut-off events. [2023-01-27 19:14:39,483 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 19:14:39,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 407 events. 54/407 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1325 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 351. Up to 12 conditions per place. [2023-01-27 19:14:39,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 32960 [2023-01-27 19:14:41,879 INFO L134 LiptonReduction]: Checked pairs total: 74358 [2023-01-27 19:14:41,879 INFO L136 LiptonReduction]: Total number of compositions: 163 [2023-01-27 19:14:41,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:14:41,881 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;@6af0b483, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:14:41,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:14:41,882 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:14:41,882 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:14:41,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:41,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:14:41,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:41,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash 54896516, now seen corresponding path program 1 times [2023-01-27 19:14:41,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:41,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476245392] [2023-01-27 19:14:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:41,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:41,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:41,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476245392] [2023-01-27 19:14:41,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476245392] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:14:41,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:14:41,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:14:41,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533600935] [2023-01-27 19:14:41,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:14:41,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:14:41,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:14:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:14:41,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 395 [2023-01-27 19:14:41,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:41,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:41,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 395 [2023-01-27 19:14:41,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand