/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_24-sound_lock_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:13:42,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:13:42,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:13:42,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-27 19:13:42,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:13:42,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:13:42,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:13:42,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:13:42,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:13:42,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:13:42,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:13:42,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:13:42,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:13:42,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:13:42,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:13:42,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:13:42,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:13:42,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:13:42,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:13:42,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:13:42,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 19:13:42,447 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:13:42,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:13:42,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:13:42,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:13:42,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:13:42,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:13:42,449 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:13:42,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:13:42,449 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:13:42,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:13:42,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:13:42,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:13:42,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:13:42,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:13:42,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:13:42,450 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:13:42,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:13:42,450 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:13:42,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:13:42,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:13:42,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:13:42,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:13:42,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:13:42,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:13:42,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:13:42,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:13:42,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:13:42,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:13:42,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:13:42,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:13:42,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:13:42,452 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:13:42,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:13:42,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:13:42,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:13:42,667 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:13:42,667 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:13:42,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-01-27 19:13:43,681 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:13:43,926 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:13:43,927 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-01-27 19:13:43,938 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32eb63b07/547ce5491e0245cfb8655713b2e2481f/FLAG4be96d749 [2023-01-27 19:13:43,953 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32eb63b07/547ce5491e0245cfb8655713b2e2481f [2023-01-27 19:13:43,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:13:43,956 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:13:43,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:13:43,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:13:43,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:13:43,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:13:43" (1/1) ... [2023-01-27 19:13:43,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34357cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:43, skipping insertion in model container [2023-01-27 19:13:43,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:13:43" (1/1) ... [2023-01-27 19:13:43,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:13:43,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:13:44,237 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_24-sound_lock_racing.i[30176,30189] [2023-01-27 19:13:44,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:13:44,263 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:13:44,296 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_24-sound_lock_racing.i[30176,30189] [2023-01-27 19:13:44,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:13:44,332 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:13:44,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44 WrapperNode [2023-01-27 19:13:44,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:13:44,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:13:44,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:13:44,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:13:44,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,377 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-01-27 19:13:44,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:13:44,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:13:44,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:13:44,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:13:44,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,404 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:13:44,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:13:44,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:13:44,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:13:44,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (1/1) ... [2023-01-27 19:13:44,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:13:44,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:13:44,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 19:13:44,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 19:13:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:13:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:13:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:13:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:13:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:13:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:13:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:13:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:13:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:13:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:13:44,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:13:44,456 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:13:44,536 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:13:44,537 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:13:44,680 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:13:44,685 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:13:44,685 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-27 19:13:44,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:13:44 BoogieIcfgContainer [2023-01-27 19:13:44,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:13:44,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:13:44,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:13:44,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:13:44,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:13:43" (1/3) ... [2023-01-27 19:13:44,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a641982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:13:44, skipping insertion in model container [2023-01-27 19:13:44,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:13:44" (2/3) ... [2023-01-27 19:13:44,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a641982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:13:44, skipping insertion in model container [2023-01-27 19:13:44,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:13:44" (3/3) ... [2023-01-27 19:13:44,692 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-01-27 19:13:44,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:13:44,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:13:44,703 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:13:44,774 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:13:44,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 114 transitions, 236 flow [2023-01-27 19:13:44,832 INFO L130 PetriNetUnfolder]: 18/147 cut-off events. [2023-01-27 19:13:44,833 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:13:44,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 147 events. 18/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-01-27 19:13:44,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 114 transitions, 236 flow [2023-01-27 19:13:44,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 223 flow [2023-01-27 19:13:44,843 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:13:44,848 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 223 flow [2023-01-27 19:13:44,850 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 223 flow [2023-01-27 19:13:44,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 223 flow [2023-01-27 19:13:44,872 INFO L130 PetriNetUnfolder]: 17/142 cut-off events. [2023-01-27 19:13:44,872 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:44,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 17/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 289 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-01-27 19:13:44,874 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-01-27 19:13:47,933 INFO L134 LiptonReduction]: Checked pairs total: 3935 [2023-01-27 19:13:47,934 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-01-27 19:13:47,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:13:47,967 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;@4e9f504, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:13:47,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:13:47,971 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 19:13:47,971 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:47,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:47,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:13:47,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:47,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:47,975 INFO L85 PathProgramCache]: Analyzing trace with hash 13523618, now seen corresponding path program 1 times [2023-01-27 19:13:47,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:47,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860845961] [2023-01-27 19:13:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:47,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:48,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:48,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860845961] [2023-01-27 19:13:48,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860845961] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:13:48,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:13:48,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:13:48,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148778362] [2023-01-27 19:13:48,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:13:48,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:13:48,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:48,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:13:48,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:13:48,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 210 [2023-01-27 19:13:48,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:48,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:48,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 210 [2023-01-27 19:13:48,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:48,307 INFO L130 PetriNetUnfolder]: 69/171 cut-off events. [2023-01-27 19:13:48,307 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:48,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 171 events. 69/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 548 event pairs, 21 based on Foata normal form. 9/163 useless extension candidates. Maximal degree in co-relation 316. Up to 114 conditions per place. [2023-01-27 19:13:48,309 INFO L137 encePairwiseOnDemand]: 197/210 looper letters, 17 selfloop transitions, 2 changer transitions 8/29 dead transitions. [2023-01-27 19:13:48,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 117 flow [2023-01-27 19:13:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:13:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:13:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-01-27 19:13:48,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-01-27 19:13:48,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-01-27 19:13:48,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-01-27 19:13:48,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:48,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-01-27 19:13:48,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:48,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:48,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:48,327 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 324 transitions. [2023-01-27 19:13:48,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 117 flow [2023-01-27 19:13:48,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 117 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:13:48,329 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 47 flow [2023-01-27 19:13:48,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-01-27 19:13:48,333 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-01-27 19:13:48,333 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 47 flow [2023-01-27 19:13:48,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:48,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:48,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:13:48,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:13:48,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:48,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash 120607350, now seen corresponding path program 1 times [2023-01-27 19:13:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:48,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649726667] [2023-01-27 19:13:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:48,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:48,370 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:13:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:48,405 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:13:48,405 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:13:48,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:13:48,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:13:48,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:13:48,408 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:13:48,410 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:13:48,410 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:13:48,421 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:13:48,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-01-27 19:13:48,443 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-01-27 19:13:48,443 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:13:48,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-01-27 19:13:48,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 306 flow [2023-01-27 19:13:48,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 306 flow [2023-01-27 19:13:48,446 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:13:48,446 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 144 transitions, 306 flow [2023-01-27 19:13:48,446 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 144 transitions, 306 flow [2023-01-27 19:13:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-01-27 19:13:48,464 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-01-27 19:13:48,464 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:13:48,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-01-27 19:13:48,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-01-27 19:13:51,068 INFO L134 LiptonReduction]: Checked pairs total: 16853 [2023-01-27 19:13:51,068 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-01-27 19:13:51,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:13:51,070 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;@4e9f504, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:13:51,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:13:51,072 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-01-27 19:13:51,072 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:51,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:51,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:13:51,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:51,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash 22205296, now seen corresponding path program 1 times [2023-01-27 19:13:51,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:51,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241560473] [2023-01-27 19:13:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:51,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:51,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:51,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241560473] [2023-01-27 19:13:51,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241560473] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:13:51,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:13:51,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:13:51,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259093247] [2023-01-27 19:13:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:13:51,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:13:51,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:13:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:13:51,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 252 [2023-01-27 19:13:51,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:51,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:51,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 252 [2023-01-27 19:13:51,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:51,324 INFO L130 PetriNetUnfolder]: 1818/3178 cut-off events. [2023-01-27 19:13:51,324 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2023-01-27 19:13:51,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6215 conditions, 3178 events. 1818/3178 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 17663 event pairs, 639 based on Foata normal form. 555/3412 useless extension candidates. Maximal degree in co-relation 4478. Up to 2714 conditions per place. [2023-01-27 19:13:51,335 INFO L137 encePairwiseOnDemand]: 233/252 looper letters, 33 selfloop transitions, 3 changer transitions 14/57 dead transitions. [2023-01-27 19:13:51,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 235 flow [2023-01-27 19:13:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:13:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:13:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-01-27 19:13:51,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-01-27 19:13:51,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-01-27 19:13:51,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-01-27 19:13:51,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:51,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-01-27 19:13:51,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:51,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:51,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:51,340 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 408 transitions. [2023-01-27 19:13:51,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 235 flow [2023-01-27 19:13:51,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 235 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:13:51,342 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 95 flow [2023-01-27 19:13:51,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-01-27 19:13:51,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-01-27 19:13:51,343 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 95 flow [2023-01-27 19:13:51,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:51,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:51,344 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:13:51,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:13:51,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:51,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:51,344 INFO L85 PathProgramCache]: Analyzing trace with hash 586384534, now seen corresponding path program 1 times [2023-01-27 19:13:51,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:51,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441835] [2023-01-27 19:13:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:51,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:51,357 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:13:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:51,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:13:51,368 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:13:51,368 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:13:51,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:13:51,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:13:51,369 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:13:51,369 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:13:51,369 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:13:51,382 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:13:51,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-01-27 19:13:51,405 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-01-27 19:13:51,405 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:13:51,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-01-27 19:13:51,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 174 transitions, 378 flow [2023-01-27 19:13:51,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 174 transitions, 378 flow [2023-01-27 19:13:51,409 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:13:51,409 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 174 transitions, 378 flow [2023-01-27 19:13:51,409 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 174 transitions, 378 flow [2023-01-27 19:13:51,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-01-27 19:13:51,430 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-01-27 19:13:51,430 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:13:51,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-01-27 19:13:51,439 INFO L119 LiptonReduction]: Number of co-enabled transitions 12432 [2023-01-27 19:13:54,350 INFO L134 LiptonReduction]: Checked pairs total: 32754 [2023-01-27 19:13:54,350 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-01-27 19:13:54,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:13:54,352 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;@4e9f504, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:13:54,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:13:54,355 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-01-27 19:13:54,355 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:54,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:54,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:13:54,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:54,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:54,355 INFO L85 PathProgramCache]: Analyzing trace with hash 32301211, now seen corresponding path program 1 times [2023-01-27 19:13:54,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:54,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281969731] [2023-01-27 19:13:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:54,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:54,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:54,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281969731] [2023-01-27 19:13:54,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281969731] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:13:54,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:13:54,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:13:54,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586893920] [2023-01-27 19:13:54,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:13:54,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:13:54,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:54,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:13:54,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:13:54,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 298 [2023-01-27 19:13:54,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:54,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:54,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 298 [2023-01-27 19:13:54,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:56,713 INFO L130 PetriNetUnfolder]: 29246/43200 cut-off events. [2023-01-27 19:13:56,713 INFO L131 PetriNetUnfolder]: For 1215/1215 co-relation queries the response was YES. [2023-01-27 19:13:56,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85148 conditions, 43200 events. 29246/43200 cut-off events. For 1215/1215 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 290406 event pairs, 12184 based on Foata normal form. 8202/48183 useless extension candidates. Maximal degree in co-relation 48393. Up to 39840 conditions per place. [2023-01-27 19:13:56,867 INFO L137 encePairwiseOnDemand]: 273/298 looper letters, 47 selfloop transitions, 4 changer transitions 15/75 dead transitions. [2023-01-27 19:13:56,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 322 flow [2023-01-27 19:13:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:13:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:13:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2023-01-27 19:13:56,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413870246085011 [2023-01-27 19:13:56,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2023-01-27 19:13:56,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2023-01-27 19:13:56,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:56,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2023-01-27 19:13:56,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:56,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:56,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:56,873 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 484 transitions. [2023-01-27 19:13:56,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 322 flow [2023-01-27 19:13:56,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:13:56,876 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 135 flow [2023-01-27 19:13:56,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-01-27 19:13:56,877 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-01-27 19:13:56,877 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 135 flow [2023-01-27 19:13:56,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:56,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:56,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:13:56,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:13:56,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:56,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1728934857, now seen corresponding path program 1 times [2023-01-27 19:13:56,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:56,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727864209] [2023-01-27 19:13:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:56,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:56,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:56,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727864209] [2023-01-27 19:13:56,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727864209] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:13:56,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344272328] [2023-01-27 19:13:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:56,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:13:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:13:56,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:13:56,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:13:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:57,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:13:57,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:13:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:57,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:13:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:57,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344272328] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:13:57,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:13:57,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-27 19:13:57,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812112875] [2023-01-27 19:13:57,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:13:57,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:13:57,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:57,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:13:57,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 19:13:57,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 298 [2023-01-27 19:13:57,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 135 flow. Second operand has 6 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:57,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:57,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 298 [2023-01-27 19:13:57,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:57,800 INFO L130 PetriNetUnfolder]: 5560/9112 cut-off events. [2023-01-27 19:13:57,800 INFO L131 PetriNetUnfolder]: For 3196/3196 co-relation queries the response was YES. [2023-01-27 19:13:57,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20567 conditions, 9112 events. 5560/9112 cut-off events. For 3196/3196 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 60965 event pairs, 0 based on Foata normal form. 0/9112 useless extension candidates. Maximal degree in co-relation 13268. Up to 5346 conditions per place. [2023-01-27 19:13:57,845 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 87 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-01-27 19:13:57,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 102 transitions, 453 flow [2023-01-27 19:13:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:13:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:13:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 909 transitions. [2023-01-27 19:13:57,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083892617449665 [2023-01-27 19:13:57,847 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 909 transitions. [2023-01-27 19:13:57,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 909 transitions. [2023-01-27 19:13:57,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:57,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 909 transitions. [2023-01-27 19:13:57,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:57,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:57,852 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:57,852 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 135 flow. Second operand 6 states and 909 transitions. [2023-01-27 19:13:57,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 102 transitions, 453 flow [2023-01-27 19:13:57,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 102 transitions, 437 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 19:13:57,859 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 129 flow [2023-01-27 19:13:57,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-01-27 19:13:57,862 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-01-27 19:13:57,862 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 129 flow [2023-01-27 19:13:57,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:57,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:57,863 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:13:57,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 19:13:58,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 19:13:58,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:58,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash 966560219, now seen corresponding path program 1 times [2023-01-27 19:13:58,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:58,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811033409] [2023-01-27 19:13:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:58,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:58,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:13:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:58,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:13:58,131 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:13:58,131 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:13:58,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:13:58,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:13:58,132 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:13:58,132 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:13:58,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:13:58,154 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:13:58,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-01-27 19:13:58,191 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-01-27 19:13:58,191 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:13:58,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-01-27 19:13:58,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 204 transitions, 452 flow [2023-01-27 19:13:58,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 204 transitions, 452 flow [2023-01-27 19:13:58,197 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:13:58,197 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 204 transitions, 452 flow [2023-01-27 19:13:58,197 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 204 transitions, 452 flow [2023-01-27 19:13:58,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-01-27 19:13:58,232 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-01-27 19:13:58,232 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:13:58,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-01-27 19:13:58,249 INFO L119 LiptonReduction]: Number of co-enabled transitions 20048 [2023-01-27 19:14:01,345 INFO L134 LiptonReduction]: Checked pairs total: 61661 [2023-01-27 19:14:01,345 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-01-27 19:14:01,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:14:01,347 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;@4e9f504, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:14:01,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:14:01,348 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-01-27 19:14:01,348 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:14:01,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:01,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:14:01,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:01,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:01,348 INFO L85 PathProgramCache]: Analyzing trace with hash 43872769, now seen corresponding path program 1 times [2023-01-27 19:14:01,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:01,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872525716] [2023-01-27 19:14:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:01,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:01,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:01,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872525716] [2023-01-27 19:14:01,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872525716] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:14:01,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:14:01,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:14:01,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723657801] [2023-01-27 19:14:01,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:14:01,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:14:01,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:14:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:14:01,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 346 [2023-01-27 19:14:01,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:01,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:01,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 346 [2023-01-27 19:14:01,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:14:38,190 INFO L130 PetriNetUnfolder]: 501939/671464 cut-off events. [2023-01-27 19:14:38,190 INFO L131 PetriNetUnfolder]: For 24372/24372 co-relation queries the response was YES. [2023-01-27 19:14:39,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335973 conditions, 671464 events. 501939/671464 cut-off events. For 24372/24372 co-relation queries the response was YES. Maximal size of possible extension queue 12093. Compared 4851151 event pairs, 241195 based on Foata normal form. 99336/729983 useless extension candidates. Maximal degree in co-relation 576890. Up to 644905 conditions per place. [2023-01-27 19:14:40,732 INFO L137 encePairwiseOnDemand]: 314/346 looper letters, 63 selfloop transitions, 5 changer transitions 16/93 dead transitions. [2023-01-27 19:14:40,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 417 flow [2023-01-27 19:14:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:14:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:14:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-01-27 19:14:40,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433526011560693 [2023-01-27 19:14:40,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-01-27 19:14:40,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-01-27 19:14:40,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:14:40,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-01-27 19:14:40,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:40,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:40,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:40,737 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 564 transitions. [2023-01-27 19:14:40,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 417 flow [2023-01-27 19:14:40,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 417 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:14:40,768 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 177 flow [2023-01-27 19:14:40,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2023-01-27 19:14:40,768 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-01-27 19:14:40,768 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 177 flow [2023-01-27 19:14:40,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:40,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:40,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:40,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:14:40,769 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:40,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -647969914, now seen corresponding path program 1 times [2023-01-27 19:14:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:40,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075247517] [2023-01-27 19:14:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:40,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:40,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075247517] [2023-01-27 19:14:40,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075247517] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:14:40,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494786049] [2023-01-27 19:14:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:40,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:14:40,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:14:40,815 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 19:14:40,857 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 19:14:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:14:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:14:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:40,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:14:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:40,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494786049] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:14:40,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:14:40,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-27 19:14:40,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467956378] [2023-01-27 19:14:40,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:14:40,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:14:40,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:40,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:14:40,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 19:14:40,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 346 [2023-01-27 19:14:40,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:40,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:40,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 346 [2023-01-27 19:14:40,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:14:48,670 INFO L130 PetriNetUnfolder]: 107481/144564 cut-off events. [2023-01-27 19:14:48,671 INFO L131 PetriNetUnfolder]: For 16337/16337 co-relation queries the response was YES. [2023-01-27 19:14:48,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307978 conditions, 144564 events. 107481/144564 cut-off events. For 16337/16337 co-relation queries the response was YES. Maximal size of possible extension queue 3837. Compared 1009435 event pairs, 8613 based on Foata normal form. 0/138475 useless extension candidates. Maximal degree in co-relation 185401. Up to 91786 conditions per place. [2023-01-27 19:14:49,453 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 120 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-01-27 19:14:49,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 144 transitions, 630 flow [2023-01-27 19:14:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:14:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:14:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1075 transitions. [2023-01-27 19:14:49,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178227360308285 [2023-01-27 19:14:49,455 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1075 transitions. [2023-01-27 19:14:49,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1075 transitions. [2023-01-27 19:14:49,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:14:49,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1075 transitions. [2023-01-27 19:14:49,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:49,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 346.0) internal successors, (2422), 7 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:49,460 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 346.0) internal successors, (2422), 7 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:49,460 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 177 flow. Second operand 6 states and 1075 transitions. [2023-01-27 19:14:49,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 144 transitions, 630 flow [2023-01-27 19:14:49,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 144 transitions, 606 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:14:49,468 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 202 flow [2023-01-27 19:14:49,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2023-01-27 19:14:49,469 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2023-01-27 19:14:49,469 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 202 flow [2023-01-27 19:14:49,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:49,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:49,469 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:49,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 19:14:49,673 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,SelfDestructingSolverStorable8 [2023-01-27 19:14:49,674 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:49,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:49,674 INFO L85 PathProgramCache]: Analyzing trace with hash -978959003, now seen corresponding path program 1 times [2023-01-27 19:14:49,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:49,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105788841] [2023-01-27 19:14:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:49,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:49,689 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:14:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:49,705 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:14:49,705 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:14:49,706 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:14:49,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:14:49,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 19:14:49,707 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:14:49,707 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:14:49,707 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:14:49,729 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:14:49,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 234 transitions, 528 flow [2023-01-27 19:14:49,796 INFO L130 PetriNetUnfolder]: 141/848 cut-off events. [2023-01-27 19:14:49,796 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:14:49,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 848 events. 141/848 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3650 event pairs, 23 based on Foata normal form. 0/717 useless extension candidates. Maximal degree in co-relation 579. Up to 80 conditions per place. [2023-01-27 19:14:49,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 234 transitions, 528 flow [2023-01-27 19:14:49,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 234 transitions, 528 flow [2023-01-27 19:14:49,811 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:14:49,812 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 234 transitions, 528 flow [2023-01-27 19:14:49,812 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 234 transitions, 528 flow [2023-01-27 19:14:49,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 234 transitions, 528 flow [2023-01-27 19:14:49,872 INFO L130 PetriNetUnfolder]: 141/848 cut-off events. [2023-01-27 19:14:49,872 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:14:49,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 848 events. 141/848 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3650 event pairs, 23 based on Foata normal form. 0/717 useless extension candidates. Maximal degree in co-relation 579. Up to 80 conditions per place. [2023-01-27 19:14:49,898 INFO L119 LiptonReduction]: Number of co-enabled transitions 29400 [2023-01-27 19:14:53,035 INFO L134 LiptonReduction]: Checked pairs total: 84233 [2023-01-27 19:14:53,035 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-01-27 19:14:53,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:14:53,036 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;@4e9f504, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:14:53,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:14:53,037 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-27 19:14:53,038 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:14:53,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:53,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:14:53,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:53,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:53,038 INFO L85 PathProgramCache]: Analyzing trace with hash 56713108, now seen corresponding path program 1 times [2023-01-27 19:14:53,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:53,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853707436] [2023-01-27 19:14:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:53,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:53,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:53,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853707436] [2023-01-27 19:14:53,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853707436] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:14:53,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:14:53,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:14:53,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247124831] [2023-01-27 19:14:53,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:14:53,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:14:53,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:14:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:14:53,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 387 [2023-01-27 19:14:53,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 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 19:14:53,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:53,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 387 [2023-01-27 19:14:53,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand