/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_07-cond_racing2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:07:35,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:07:35,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:07:35,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:07:35,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:07:35,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:07:35,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:07:35,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:07:35,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:07:35,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:07:35,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:07:35,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:07:35,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:07:35,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:07:35,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:07:35,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:07:35,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:07:35,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:07:35,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:07:35,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:07:35,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:07:35,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:07:35,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:07:35,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:07:35,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:07:35,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:07:35,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:07:35,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:07:35,189 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 19:07:35,208 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:07:35,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:07:35,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:07:35,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:07:35,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:07:35,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:07:35,210 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:07:35,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:07:35,211 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:07:35,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:07:35,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:07:35,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:07:35,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:07:35,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:07:35,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:07:35,212 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:07:35,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:07:35,212 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:07:35,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:07:35,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:07:35,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:07:35,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:07:35,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:07:35,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:07:35,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:07:35,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:07:35,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:07:35,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:07:35,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:07:35,214 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:07:35,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:07:35,214 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:07:35,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:07:35,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:07:35,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:07:35,439 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:07:35,439 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:07:35,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-01-27 19:07:36,584 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:07:36,791 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:07:36,791 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-01-27 19:07:36,807 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5023077/8d7d045a333441e19fc8f691369800c2/FLAGfb6aad76f [2023-01-27 19:07:36,820 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5023077/8d7d045a333441e19fc8f691369800c2 [2023-01-27 19:07:36,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:07:36,824 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:07:36,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:07:36,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:07:36,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:07:36,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:07:36" (1/1) ... [2023-01-27 19:07:36,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a6fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:36, skipping insertion in model container [2023-01-27 19:07:36,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:07:36" (1/1) ... [2023-01-27 19:07:36,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:07:36,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:07:37,220 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_07-cond_racing2.i[41322,41335] [2023-01-27 19:07:37,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:07:37,262 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:07:37,295 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_07-cond_racing2.i[41322,41335] [2023-01-27 19:07:37,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:07:37,363 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:07:37,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37 WrapperNode [2023-01-27 19:07:37,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:07:37,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:07:37,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:07:37,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:07:37,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,430 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-01-27 19:07:37,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:07:37,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:07:37,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:07:37,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:07:37,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:07:37,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:07:37,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:07:37,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:07:37,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (1/1) ... [2023-01-27 19:07:37,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:07:37,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:07:37,498 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 19:07:37,499 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 19:07:37,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:07:37,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:07:37,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:07:37,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:07:37,526 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:07:37,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:07:37,526 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:07:37,527 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:07:37,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:07:37,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:07:37,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:07:37,528 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 19:07:37,649 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:07:37,651 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:07:37,900 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:07:37,906 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:07:37,907 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-27 19:07:37,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:07:37 BoogieIcfgContainer [2023-01-27 19:07:37,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:07:37,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:07:37,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:07:37,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:07:37,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:07:36" (1/3) ... [2023-01-27 19:07:37,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204eb6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:07:37, skipping insertion in model container [2023-01-27 19:07:37,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:07:37" (2/3) ... [2023-01-27 19:07:37,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204eb6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:07:37, skipping insertion in model container [2023-01-27 19:07:37,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:07:37" (3/3) ... [2023-01-27 19:07:37,915 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2023-01-27 19:07:37,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:07:37,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:07:37,931 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:07:37,977 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:07:38,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 121 transitions, 250 flow [2023-01-27 19:07:38,076 INFO L130 PetriNetUnfolder]: 23/163 cut-off events. [2023-01-27 19:07:38,076 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:07:38,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 163 events. 23/163 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-01-27 19:07:38,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 121 transitions, 250 flow [2023-01-27 19:07:38,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 116 transitions, 237 flow [2023-01-27 19:07:38,099 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:07:38,107 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 116 transitions, 237 flow [2023-01-27 19:07:38,110 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 116 transitions, 237 flow [2023-01-27 19:07:38,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 116 transitions, 237 flow [2023-01-27 19:07:38,140 INFO L130 PetriNetUnfolder]: 22/158 cut-off events. [2023-01-27 19:07:38,140 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:38,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 158 events. 22/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 349 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-01-27 19:07:38,152 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-01-27 19:07:41,288 INFO L134 LiptonReduction]: Checked pairs total: 4289 [2023-01-27 19:07:41,288 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-01-27 19:07:41,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:07:41,306 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;@66ac1f20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:07:41,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:07:41,310 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 19:07:41,310 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:41,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:41,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:07:41,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:41,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash 14433895, now seen corresponding path program 1 times [2023-01-27 19:07:41,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:41,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868913488] [2023-01-27 19:07:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:41,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:41,604 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 19:07:41,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:41,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868913488] [2023-01-27 19:07:41,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868913488] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:41,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:41,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:07:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139281748] [2023-01-27 19:07:41,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:41,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:41,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:41,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:41,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:41,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 224 [2023-01-27 19:07:41,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 19:07:41,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:41,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 224 [2023-01-27 19:07:41,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:41,730 INFO L130 PetriNetUnfolder]: 97/210 cut-off events. [2023-01-27 19:07:41,730 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:41,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 210 events. 97/210 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 739 event pairs, 70 based on Foata normal form. 12/186 useless extension candidates. Maximal degree in co-relation 409. Up to 197 conditions per place. [2023-01-27 19:07:41,737 INFO L137 encePairwiseOnDemand]: 212/224 looper letters, 22 selfloop transitions, 2 changer transitions 7/33 dead transitions. [2023-01-27 19:07:41,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 133 flow [2023-01-27 19:07:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:07:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:07:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2023-01-27 19:07:41,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163690476190477 [2023-01-27 19:07:41,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2023-01-27 19:07:41,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2023-01-27 19:07:41,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:41,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2023-01-27 19:07:41,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states 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 19:07:41,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states 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 19:07:41,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states 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 19:07:41,780 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 347 transitions. [2023-01-27 19:07:41,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 133 flow [2023-01-27 19:07:41,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:07:41,785 INFO L231 Difference]: Finished difference. Result has 29 places, 17 transitions, 47 flow [2023-01-27 19:07:41,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2023-01-27 19:07:41,790 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-01-27 19:07:41,790 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 47 flow [2023-01-27 19:07:41,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 19:07:41,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:41,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:07:41,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:07:41,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:41,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash 950607665, now seen corresponding path program 1 times [2023-01-27 19:07:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:41,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391813744] [2023-01-27 19:07:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:41,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:41,846 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:07:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:41,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:07:41,890 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:07:41,891 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:07:41,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:07:41,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:07:41,898 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:07:41,901 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:07:41,902 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:07:41,932 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:07:41,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 151 transitions, 320 flow [2023-01-27 19:07:41,997 INFO L130 PetriNetUnfolder]: 40/259 cut-off events. [2023-01-27 19:07:41,998 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:07:42,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 40/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 723 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 165. Up to 9 conditions per place. [2023-01-27 19:07:42,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 151 transitions, 320 flow [2023-01-27 19:07:42,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 151 transitions, 320 flow [2023-01-27 19:07:42,004 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:07:42,005 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 151 transitions, 320 flow [2023-01-27 19:07:42,006 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 151 transitions, 320 flow [2023-01-27 19:07:42,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 151 transitions, 320 flow [2023-01-27 19:07:42,033 INFO L130 PetriNetUnfolder]: 40/259 cut-off events. [2023-01-27 19:07:42,034 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:07:42,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 40/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 723 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 165. Up to 9 conditions per place. [2023-01-27 19:07:42,040 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-01-27 19:07:44,921 INFO L134 LiptonReduction]: Checked pairs total: 19419 [2023-01-27 19:07:44,922 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-01-27 19:07:44,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:07:44,924 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;@66ac1f20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:07:44,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:07:44,927 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-27 19:07:44,927 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:44,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:44,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:07:44,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:44,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash 23513882, now seen corresponding path program 1 times [2023-01-27 19:07:44,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:44,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926275403] [2023-01-27 19:07:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:44,992 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 19:07:44,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:44,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926275403] [2023-01-27 19:07:44,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926275403] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:44,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:44,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:07:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034222835] [2023-01-27 19:07:44,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:44,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:44,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:44,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:44,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-01-27 19:07:44,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 19:07:44,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:44,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-01-27 19:07:44,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:45,229 INFO L130 PetriNetUnfolder]: 1562/2747 cut-off events. [2023-01-27 19:07:45,229 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-01-27 19:07:45,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5327 conditions, 2747 events. 1562/2747 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16635 event pairs, 704 based on Foata normal form. 356/2699 useless extension candidates. Maximal degree in co-relation 714. Up to 2513 conditions per place. [2023-01-27 19:07:45,239 INFO L137 encePairwiseOnDemand]: 246/265 looper letters, 28 selfloop transitions, 2 changer transitions 12/52 dead transitions. [2023-01-27 19:07:45,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 204 flow [2023-01-27 19:07:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:07:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:07:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-01-27 19:07:45,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2023-01-27 19:07:45,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-01-27 19:07:45,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-01-27 19:07:45,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:45,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-01-27 19:07:45,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states 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 19:07:45,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 19:07:45,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 19:07:45,247 INFO L175 Difference]: Start difference. First operand has 46 places, 59 transitions, 136 flow. Second operand 3 states and 430 transitions. [2023-01-27 19:07:45,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 204 flow [2023-01-27 19:07:45,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 52 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:07:45,249 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 88 flow [2023-01-27 19:07:45,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-01-27 19:07:45,250 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-01-27 19:07:45,251 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 88 flow [2023-01-27 19:07:45,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 19:07:45,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:45,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:07:45,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:07:45,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:45,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash -227384455, now seen corresponding path program 1 times [2023-01-27 19:07:45,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:45,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220457741] [2023-01-27 19:07:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:45,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:07:45,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:45,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220457741] [2023-01-27 19:07:45,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220457741] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:45,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:45,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:07:45,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230518230] [2023-01-27 19:07:45,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:45,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:45,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:45,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 265 [2023-01-27 19:07:45,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 19:07:45,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:45,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 265 [2023-01-27 19:07:45,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:45,543 INFO L130 PetriNetUnfolder]: 1117/1879 cut-off events. [2023-01-27 19:07:45,543 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2023-01-27 19:07:45,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4009 conditions, 1879 events. 1117/1879 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9084 event pairs, 438 based on Foata normal form. 16/1888 useless extension candidates. Maximal degree in co-relation 3928. Up to 1659 conditions per place. [2023-01-27 19:07:45,553 INFO L137 encePairwiseOnDemand]: 261/265 looper letters, 38 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-01-27 19:07:45,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 208 flow [2023-01-27 19:07:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:07:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:07:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-01-27 19:07:45,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49937106918238994 [2023-01-27 19:07:45,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-01-27 19:07:45,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-01-27 19:07:45,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:45,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-01-27 19:07:45,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:45,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 19:07:45,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 19:07:45,559 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 88 flow. Second operand 3 states and 397 transitions. [2023-01-27 19:07:45,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 208 flow [2023-01-27 19:07:45,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 203 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:07:45,561 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 103 flow [2023-01-27 19:07:45,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-01-27 19:07:45,562 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2023-01-27 19:07:45,562 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 103 flow [2023-01-27 19:07:45,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 19:07:45,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:45,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:07:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:07:45,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:45,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1552769436, now seen corresponding path program 1 times [2023-01-27 19:07:45,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:45,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10546038] [2023-01-27 19:07:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:45,575 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:07:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:45,587 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:07:45,588 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:07:45,588 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:07:45,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:07:45,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:07:45,588 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:07:45,589 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:07:45,589 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:07:45,604 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:07:45,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 181 transitions, 392 flow [2023-01-27 19:07:45,638 INFO L130 PetriNetUnfolder]: 62/386 cut-off events. [2023-01-27 19:07:45,639 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:07:45,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 386 events. 62/386 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-01-27 19:07:45,641 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 181 transitions, 392 flow [2023-01-27 19:07:45,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 181 transitions, 392 flow [2023-01-27 19:07:45,643 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:07:45,643 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 181 transitions, 392 flow [2023-01-27 19:07:45,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 181 transitions, 392 flow [2023-01-27 19:07:45,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 181 transitions, 392 flow [2023-01-27 19:07:45,674 INFO L130 PetriNetUnfolder]: 62/386 cut-off events. [2023-01-27 19:07:45,674 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:07:45,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 386 events. 62/386 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-01-27 19:07:45,686 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2023-01-27 19:07:48,445 INFO L134 LiptonReduction]: Checked pairs total: 34795 [2023-01-27 19:07:48,445 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-01-27 19:07:48,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:07:48,454 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;@66ac1f20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:07:48,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:07:48,458 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-27 19:07:48,458 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:48,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:48,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:07:48,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:48,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash 33981215, now seen corresponding path program 1 times [2023-01-27 19:07:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:48,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439499295] [2023-01-27 19:07:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:48,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:48,503 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 19:07:48,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:48,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439499295] [2023-01-27 19:07:48,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439499295] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:48,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:48,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:07:48,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597174420] [2023-01-27 19:07:48,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:48,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:48,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:48,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:48,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 310 [2023-01-27 19:07:48,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 19:07:48,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:48,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 310 [2023-01-27 19:07:48,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:50,685 INFO L130 PetriNetUnfolder]: 17546/26877 cut-off events. [2023-01-27 19:07:50,685 INFO L131 PetriNetUnfolder]: For 709/709 co-relation queries the response was YES. [2023-01-27 19:07:50,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52212 conditions, 26877 events. 17546/26877 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 195571 event pairs, 14971 based on Foata normal form. 6596/30238 useless extension candidates. Maximal degree in co-relation 9920. Up to 24769 conditions per place. [2023-01-27 19:07:50,792 INFO L137 encePairwiseOnDemand]: 285/310 looper letters, 35 selfloop transitions, 2 changer transitions 13/65 dead transitions. [2023-01-27 19:07:50,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 258 flow [2023-01-27 19:07:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:07:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:07:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 510 transitions. [2023-01-27 19:07:50,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2023-01-27 19:07:50,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 510 transitions. [2023-01-27 19:07:50,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 510 transitions. [2023-01-27 19:07:50,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:50,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 510 transitions. [2023-01-27 19:07:50,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 19:07:50,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 19:07:50,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 19:07:50,799 INFO L175 Difference]: Start difference. First operand has 60 places, 78 transitions, 186 flow. Second operand 3 states and 510 transitions. [2023-01-27 19:07:50,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 258 flow [2023-01-27 19:07:50,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:07:50,803 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 121 flow [2023-01-27 19:07:50,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-01-27 19:07:50,806 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-01-27 19:07:50,806 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 121 flow [2023-01-27 19:07:50,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 19:07:50,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:50,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:07:50,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:07:50,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:50,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:50,807 INFO L85 PathProgramCache]: Analyzing trace with hash 208662509, now seen corresponding path program 1 times [2023-01-27 19:07:50,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:50,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960186004] [2023-01-27 19:07:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:50,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:07:50,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:50,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960186004] [2023-01-27 19:07:50,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960186004] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:50,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:50,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:07:50,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138895200] [2023-01-27 19:07:50,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:50,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:50,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:50,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:50,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 310 [2023-01-27 19:07:50,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 19:07:50,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:50,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 310 [2023-01-27 19:07:50,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:52,538 INFO L130 PetriNetUnfolder]: 14619/21485 cut-off events. [2023-01-27 19:07:52,538 INFO L131 PetriNetUnfolder]: For 2659/2659 co-relation queries the response was YES. [2023-01-27 19:07:52,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44620 conditions, 21485 events. 14619/21485 cut-off events. For 2659/2659 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 131954 event pairs, 6373 based on Foata normal form. 52/21474 useless extension candidates. Maximal degree in co-relation 44543. Up to 19928 conditions per place. [2023-01-27 19:07:52,640 INFO L137 encePairwiseOnDemand]: 305/310 looper letters, 49 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-01-27 19:07:52,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 280 flow [2023-01-27 19:07:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:07:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:07:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-01-27 19:07:52,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4978494623655914 [2023-01-27 19:07:52,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-01-27 19:07:52,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-01-27 19:07:52,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:52,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-01-27 19:07:52,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:07:52,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 19:07:52,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 19:07:52,647 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 121 flow. Second operand 3 states and 463 transitions. [2023-01-27 19:07:52,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 280 flow [2023-01-27 19:07:52,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 269 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-27 19:07:52,654 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 139 flow [2023-01-27 19:07:52,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-01-27 19:07:52,656 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2023-01-27 19:07:52,656 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 139 flow [2023-01-27 19:07:52,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 19:07:52,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:52,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:07:52,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:07:52,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:52,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1102521948, now seen corresponding path program 1 times [2023-01-27 19:07:52,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:52,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228511025] [2023-01-27 19:07:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:52,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:52,732 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 19:07:52,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:52,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228511025] [2023-01-27 19:07:52,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228511025] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:07:52,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123079599] [2023-01-27 19:07:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:52,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:07:52,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:07:52,739 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 19:07:52,743 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 19:07:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:52,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:07:52,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:07:52,886 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 19:07:52,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:07:52,934 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 19:07:52,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123079599] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:07:52,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:07:52,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:07:52,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336794330] [2023-01-27 19:07:52,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:07:52,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:07:52,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:52,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:07:52,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:07:52,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 310 [2023-01-27 19:07:52,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 139 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 19:07:52,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:52,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 310 [2023-01-27 19:07:52,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:07:53,387 INFO L130 PetriNetUnfolder]: 3846/6423 cut-off events. [2023-01-27 19:07:53,387 INFO L131 PetriNetUnfolder]: For 1053/1053 co-relation queries the response was YES. [2023-01-27 19:07:53,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13681 conditions, 6423 events. 3846/6423 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 42405 event pairs, 525 based on Foata normal form. 619/6994 useless extension candidates. Maximal degree in co-relation 8733. Up to 3794 conditions per place. [2023-01-27 19:07:53,495 INFO L137 encePairwiseOnDemand]: 307/310 looper letters, 70 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-01-27 19:07:53,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 91 transitions, 381 flow [2023-01-27 19:07:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:07:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:07:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 938 transitions. [2023-01-27 19:07:53,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043010752688172 [2023-01-27 19:07:53,499 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 938 transitions. [2023-01-27 19:07:53,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 938 transitions. [2023-01-27 19:07:53,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:07:53,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 938 transitions. [2023-01-27 19:07:53,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 19:07:53,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states 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 19:07:53,505 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states 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 19:07:53,505 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 139 flow. Second operand 6 states and 938 transitions. [2023-01-27 19:07:53,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 91 transitions, 381 flow [2023-01-27 19:07:53,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 91 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:07:53,508 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 137 flow [2023-01-27 19:07:53,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=137, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-01-27 19:07:53,508 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-01-27 19:07:53,508 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 137 flow [2023-01-27 19:07:53,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 19:07:53,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:53,509 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:07:53,517 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 19:07:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:07:53,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:53,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1306786674, now seen corresponding path program 1 times [2023-01-27 19:07:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046024836] [2023-01-27 19:07:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:53,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:07:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:07:53,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:07:53,755 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:07:53,756 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:07:53,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:07:53,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:07:53,756 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-27 19:07:53,757 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:07:53,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:07:53,777 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:07:53,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 211 transitions, 466 flow [2023-01-27 19:07:53,831 INFO L130 PetriNetUnfolder]: 96/577 cut-off events. [2023-01-27 19:07:53,832 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:07:53,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 577 events. 96/577 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2109 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 406. Up to 32 conditions per place. [2023-01-27 19:07:53,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 211 transitions, 466 flow [2023-01-27 19:07:53,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 211 transitions, 466 flow [2023-01-27 19:07:53,839 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:07:53,839 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 211 transitions, 466 flow [2023-01-27 19:07:53,840 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 211 transitions, 466 flow [2023-01-27 19:07:53,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 211 transitions, 466 flow [2023-01-27 19:07:53,890 INFO L130 PetriNetUnfolder]: 96/577 cut-off events. [2023-01-27 19:07:53,890 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:07:53,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 577 events. 96/577 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2109 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 406. Up to 32 conditions per place. [2023-01-27 19:07:53,910 INFO L119 LiptonReduction]: Number of co-enabled transitions 22064 [2023-01-27 19:07:57,023 INFO L134 LiptonReduction]: Checked pairs total: 57997 [2023-01-27 19:07:57,023 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-01-27 19:07:57,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:07:57,025 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;@66ac1f20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:07:57,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:07:57,027 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 19:07:57,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:07:57,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:07:57,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:07:57,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:07:57,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:07:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash 45924686, now seen corresponding path program 1 times [2023-01-27 19:07:57,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:07:57,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695103253] [2023-01-27 19:07:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:07:57,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:07:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:07:57,059 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 19:07:57,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:07:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695103253] [2023-01-27 19:07:57,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695103253] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:07:57,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:07:57,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:07:57,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215110752] [2023-01-27 19:07:57,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:07:57,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:07:57,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:07:57,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:07:57,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:07:57,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 358 [2023-01-27 19:07:57,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 19:07:57,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:07:57,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 358 [2023-01-27 19:07:57,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:08:22,866 INFO L130 PetriNetUnfolder]: 298488/413993 cut-off events. [2023-01-27 19:08:22,866 INFO L131 PetriNetUnfolder]: For 14774/14774 co-relation queries the response was YES. [2023-01-27 19:08:23,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810088 conditions, 413993 events. 298488/413993 cut-off events. For 14774/14774 co-relation queries the response was YES. Maximal size of possible extension queue 9173. Compared 3259963 event pairs, 214740 based on Foata normal form. 66901/448051 useless extension candidates. Maximal degree in co-relation 70928. Up to 387778 conditions per place. [2023-01-27 19:08:24,243 INFO L137 encePairwiseOnDemand]: 328/358 looper letters, 49 selfloop transitions, 2 changer transitions 13/79 dead transitions. [2023-01-27 19:08:24,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-01-27 19:08:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:08:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:08:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-01-27 19:08:24,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540037243947858 [2023-01-27 19:08:24,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-01-27 19:08:24,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-01-27 19:08:24,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:08:24,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-01-27 19:08:24,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states 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 19:08:24,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 19:08:24,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 19:08:24,250 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 595 transitions. [2023-01-27 19:08:24,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-01-27 19:08:24,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:08:24,255 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 156 flow [2023-01-27 19:08:24,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-01-27 19:08:24,255 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-01-27 19:08:24,256 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 156 flow [2023-01-27 19:08:24,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 19:08:24,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:08:24,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:08:24,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 19:08:24,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:08:24,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:08:24,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1252548333, now seen corresponding path program 1 times [2023-01-27 19:08:24,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:08:24,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695203668] [2023-01-27 19:08:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:08:24,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:08:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:08:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:08:24,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:08:24,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695203668] [2023-01-27 19:08:24,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695203668] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:08:24,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:08:24,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:08:24,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726321659] [2023-01-27 19:08:24,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:08:24,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:08:24,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:08:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:08:24,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:08:24,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 358 [2023-01-27 19:08:24,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 19:08:24,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:08:24,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 358 [2023-01-27 19:08:24,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:08:40,596 INFO L130 PetriNetUnfolder]: 241132/313464 cut-off events. [2023-01-27 19:08:40,596 INFO L131 PetriNetUnfolder]: For 34500/34500 co-relation queries the response was YES. [2023-01-27 19:08:41,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655703 conditions, 313464 events. 241132/313464 cut-off events. For 34500/34500 co-relation queries the response was YES. Maximal size of possible extension queue 6424. Compared 2027255 event pairs, 118333 based on Foata normal form. 192/313593 useless extension candidates. Maximal degree in co-relation 655630. Up to 309513 conditions per place. [2023-01-27 19:08:42,168 INFO L137 encePairwiseOnDemand]: 352/358 looper letters, 65 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-01-27 19:08:42,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 368 flow [2023-01-27 19:08:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:08:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:08:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-01-27 19:08:42,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972067039106145 [2023-01-27 19:08:42,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-01-27 19:08:42,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-01-27 19:08:42,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:08:42,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-01-27 19:08:42,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 19:08:42,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 19:08:42,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 19:08:42,178 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 156 flow. Second operand 3 states and 534 transitions. [2023-01-27 19:08:42,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 368 flow [2023-01-27 19:08:42,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 347 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-01-27 19:08:42,190 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 175 flow [2023-01-27 19:08:42,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-01-27 19:08:42,190 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-01-27 19:08:42,191 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 175 flow [2023-01-27 19:08:42,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 19:08:42,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:08:42,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:08:42,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:08:42,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:08:42,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:08:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash -738651694, now seen corresponding path program 1 times [2023-01-27 19:08:42,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:08:42,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807502492] [2023-01-27 19:08:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:08:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:08:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:08:42,238 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 19:08:42,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:08:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807502492] [2023-01-27 19:08:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807502492] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:08:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048712530] [2023-01-27 19:08:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:08:42,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:08:42,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:08:42,240 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 19:08:42,242 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 19:08:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:08:42,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:08:42,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:08:42,330 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 19:08:42,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:08:42,371 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 19:08:42,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048712530] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:08:42,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:08:42,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:08:42,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586702684] [2023-01-27 19:08:42,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:08:42,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:08:42,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:08:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:08:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:08:42,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 358 [2023-01-27 19:08:42,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 19:08:42,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:08:42,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 358 [2023-01-27 19:08:42,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:08:51,196 INFO L130 PetriNetUnfolder]: 123388/165483 cut-off events. [2023-01-27 19:08:51,196 INFO L131 PetriNetUnfolder]: For 21309/21309 co-relation queries the response was YES. [2023-01-27 19:08:51,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364249 conditions, 165483 events. 123388/165483 cut-off events. For 21309/21309 co-relation queries the response was YES. Maximal size of possible extension queue 4100. Compared 1142012 event pairs, 8326 based on Foata normal form. 738/166219 useless extension candidates. Maximal degree in co-relation 282508. Up to 105544 conditions per place. [2023-01-27 19:08:51,997 INFO L137 encePairwiseOnDemand]: 354/358 looper letters, 133 selfloop transitions, 6 changer transitions 0/154 dead transitions. [2023-01-27 19:08:51,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 154 transitions, 691 flow [2023-01-27 19:08:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:08:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:08:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1125 transitions. [2023-01-27 19:08:52,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5237430167597765 [2023-01-27 19:08:52,001 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1125 transitions. [2023-01-27 19:08:52,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1125 transitions. [2023-01-27 19:08:52,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:08:52,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1125 transitions. [2023-01-27 19:08:52,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 187.5) internal successors, (1125), 6 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states 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 19:08:52,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states 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 19:08:52,007 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states 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 19:08:52,007 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 175 flow. Second operand 6 states and 1125 transitions. [2023-01-27 19:08:52,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 154 transitions, 691 flow [2023-01-27 19:08:52,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 154 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:08:52,010 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 210 flow [2023-01-27 19:08:52,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2023-01-27 19:08:52,011 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 5 predicate places. [2023-01-27 19:08:52,011 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 210 flow [2023-01-27 19:08:52,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 19:08:52,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:08:52,012 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:08:52,020 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 19:08:52,216 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,SelfDestructingSolverStorable11 [2023-01-27 19:08:52,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:08:52,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:08:52,217 INFO L85 PathProgramCache]: Analyzing trace with hash 988704650, now seen corresponding path program 1 times [2023-01-27 19:08:52,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:08:52,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402878615] [2023-01-27 19:08:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:08:52,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:08:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:08:52,233 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:08:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:08:52,255 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:08:52,256 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:08:52,256 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:08:52,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:08:52,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-27 19:08:52,256 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-27 19:08:52,257 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:08:52,257 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:08:52,279 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:08:52,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 241 transitions, 542 flow [2023-01-27 19:08:52,364 INFO L130 PetriNetUnfolder]: 158/900 cut-off events. [2023-01-27 19:08:52,364 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:08:52,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 158/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3855 event pairs, 23 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 622. Up to 80 conditions per place. [2023-01-27 19:08:52,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 241 transitions, 542 flow [2023-01-27 19:08:52,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 241 transitions, 542 flow [2023-01-27 19:08:52,375 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:08:52,375 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 241 transitions, 542 flow [2023-01-27 19:08:52,375 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 241 transitions, 542 flow [2023-01-27 19:08:52,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 241 transitions, 542 flow [2023-01-27 19:08:52,436 INFO L130 PetriNetUnfolder]: 158/900 cut-off events. [2023-01-27 19:08:52,437 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:08:52,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 158/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3855 event pairs, 23 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 622. Up to 80 conditions per place. [2023-01-27 19:08:52,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 31920 [2023-01-27 19:08:55,450 INFO L134 LiptonReduction]: Checked pairs total: 89022 [2023-01-27 19:08:55,450 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-01-27 19:08:55,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:08:55,452 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;@66ac1f20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:08:55,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:08:55,453 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 19:08:55,453 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:08:55,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:08:55,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:08:55,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:08:55,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:08:55,454 INFO L85 PathProgramCache]: Analyzing trace with hash 59255213, now seen corresponding path program 1 times [2023-01-27 19:08:55,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:08:55,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721759668] [2023-01-27 19:08:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:08:55,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:08:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:08:55,478 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 19:08:55,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:08:55,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721759668] [2023-01-27 19:08:55,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721759668] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:08:55,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:08:55,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:08:55,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655161911] [2023-01-27 19:08:55,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:08:55,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:08:55,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:08:55,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:08:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:08:55,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 403 [2023-01-27 19:08:55,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 19:08:55,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:08:55,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 403 [2023-01-27 19:08:55,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand