/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-complex/bounded_buffer.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 00:50:56,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 00:50:56,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 00:50:56,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 00:50:56,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 00:50:56,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 00:50:56,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 00:50:56,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 00:50:56,980 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 00:50:56,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 00:50:56,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 00:50:56,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 00:50:56,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 00:50:56,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 00:50:56,982 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 00:50:56,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 00:50:56,982 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 00:50:56,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 00:50:56,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 00:50:56,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 00:50:56,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 00:50:56,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 00:50:56,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 00:50:56,983 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 00:50:56,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 00:50:56,983 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 00:50:56,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 00:50:56,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 00:50:56,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 00:50:56,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 00:50:56,985 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 00:50:57,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 00:50:57,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 00:50:57,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 00:50:57,183 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 00:50:57,183 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 00:50:57,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/bounded_buffer.i [2023-01-28 00:50:58,167 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 00:50:58,461 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 00:50:58,462 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/bounded_buffer.i [2023-01-28 00:50:58,479 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ab25bd4/222a819484d847a58654ae8c026d75cf/FLAG5b2fe3cc8 [2023-01-28 00:50:58,494 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ab25bd4/222a819484d847a58654ae8c026d75cf [2023-01-28 00:50:58,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 00:50:58,497 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 00:50:58,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 00:50:58,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 00:50:58,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 00:50:58,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:50:58" (1/1) ... [2023-01-28 00:50:58,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1e34ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:58, skipping insertion in model container [2023-01-28 00:50:58,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:50:58" (1/1) ... [2023-01-28 00:50:58,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 00:50:58,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 00:50:59,029 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/bounded_buffer.i[70002,70015] [2023-01-28 00:50:59,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 00:50:59,053 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 00:50:59,088 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/bounded_buffer.i[70002,70015] [2023-01-28 00:50:59,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 00:50:59,193 WARN L667 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 00:50:59,198 INFO L208 MainTranslator]: Completed translation [2023-01-28 00:50:59,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59 WrapperNode [2023-01-28 00:50:59,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 00:50:59,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 00:50:59,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 00:50:59,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 00:50:59,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,278 INFO L138 Inliner]: procedures = 428, calls = 126, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 459 [2023-01-28 00:50:59,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 00:50:59,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 00:50:59,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 00:50:59,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 00:50:59,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,330 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 00:50:59,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 00:50:59,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 00:50:59,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 00:50:59,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (1/1) ... [2023-01-28 00:50:59,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 00:50:59,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:50:59,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 00:50:59,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 00:50:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2023-01-28 00:50:59,394 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2023-01-28 00:50:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 00:50:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 00:50:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 00:50:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 00:50:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-01-28 00:50:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 00:50:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-01-28 00:50:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 00:50:59,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 00:50:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 00:50:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-01-28 00:50:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2023-01-28 00:50:59,396 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2023-01-28 00:50:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 00:50:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 00:50:59,397 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 00:50:59,532 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 00:50:59,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 00:50:59,973 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 00:50:59,985 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 00:50:59,986 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-01-28 00:50:59,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:50:59 BoogieIcfgContainer [2023-01-28 00:50:59,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 00:50:59,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 00:50:59,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 00:50:59,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 00:50:59,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 12:50:58" (1/3) ... [2023-01-28 00:50:59,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b7336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:50:59, skipping insertion in model container [2023-01-28 00:50:59,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:50:59" (2/3) ... [2023-01-28 00:50:59,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b7336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:50:59, skipping insertion in model container [2023-01-28 00:50:59,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:50:59" (3/3) ... [2023-01-28 00:51:00,000 INFO L112 eAbstractionObserver]: Analyzing ICFG bounded_buffer.i [2023-01-28 00:51:00,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 00:51:00,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 00:51:00,013 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 00:51:00,201 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 00:51:00,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 423 places, 467 transitions, 956 flow [2023-01-28 00:51:00,463 INFO L130 PetriNetUnfolder]: 109/1010 cut-off events. [2023-01-28 00:51:00,463 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 00:51:00,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 1010 events. 109/1010 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5984 event pairs, 0 based on Foata normal form. 0/893 useless extension candidates. Maximal degree in co-relation 534. Up to 16 conditions per place. [2023-01-28 00:51:00,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 423 places, 467 transitions, 956 flow [2023-01-28 00:51:00,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 423 places, 467 transitions, 956 flow [2023-01-28 00:51:00,501 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:51:00,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 423 places, 467 transitions, 956 flow [2023-01-28 00:51:00,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 423 places, 467 transitions, 956 flow [2023-01-28 00:51:00,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 423 places, 467 transitions, 956 flow [2023-01-28 00:51:00,639 INFO L130 PetriNetUnfolder]: 109/1010 cut-off events. [2023-01-28 00:51:00,640 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 00:51:00,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 1010 events. 109/1010 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5984 event pairs, 0 based on Foata normal form. 0/893 useless extension candidates. Maximal degree in co-relation 534. Up to 16 conditions per place. [2023-01-28 00:51:00,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 103794 [2023-01-28 00:51:25,532 WARN L222 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 199 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:51:35,995 WARN L222 SmtUtils]: Spent 10.46s on a formula simplification that was a NOOP. DAG size: 185 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:51:48,717 WARN L222 SmtUtils]: Spent 12.72s on a formula simplification that was a NOOP. DAG size: 199 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:51:59,151 WARN L222 SmtUtils]: Spent 10.43s on a formula simplification that was a NOOP. DAG size: 185 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:53:10,068 WARN L222 SmtUtils]: Spent 1.16m on a formula simplification. DAG size of input: 309 DAG size of output: 274 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:53:34,490 WARN L222 SmtUtils]: Spent 24.42s on a formula simplification that was a NOOP. DAG size: 263 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:54:43,447 WARN L222 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 322 DAG size of output: 282 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:55:14,893 WARN L222 SmtUtils]: Spent 31.44s on a formula simplification that was a NOOP. DAG size: 269 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:55:14,918 INFO L134 LiptonReduction]: Checked pairs total: 242585 [2023-01-28 00:55:14,918 INFO L136 LiptonReduction]: Total number of compositions: 447 [2023-01-28 00:55:14,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:55:14,930 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;@150e2ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:55:14,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 00:55:14,937 INFO L130 PetriNetUnfolder]: 7/57 cut-off events. [2023-01-28 00:55:14,937 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 00:55:14,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:55:14,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2023-01-28 00:55:14,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:55:14,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:55:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash 654676923, now seen corresponding path program 1 times [2023-01-28 00:55:14,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:55:14,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682149751] [2023-01-28 00:55:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:55:14,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:55:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:55:15,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:55:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:55:15,222 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:55:15,223 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:55:15,223 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-28 00:55:15,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-01-28 00:55:15,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 00:55:15,225 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:55:15,229 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-01-28 00:55:15,230 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:55:15,230 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 00:55:15,301 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-01-28 00:55:15,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 650 places, 719 transitions, 1486 flow [2023-01-28 00:55:16,061 INFO L130 PetriNetUnfolder]: 384/3284 cut-off events. [2023-01-28 00:55:16,061 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-01-28 00:55:16,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 3284 events. 384/3284 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 26182 event pairs, 2 based on Foata normal form. 0/2907 useless extension candidates. Maximal degree in co-relation 1846. Up to 64 conditions per place. [2023-01-28 00:55:16,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 650 places, 719 transitions, 1486 flow [2023-01-28 00:55:16,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 650 places, 719 transitions, 1486 flow [2023-01-28 00:55:16,134 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:55:16,134 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 650 places, 719 transitions, 1486 flow [2023-01-28 00:55:16,135 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 650 places, 719 transitions, 1486 flow [2023-01-28 00:55:16,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 650 places, 719 transitions, 1486 flow [2023-01-28 00:55:16,776 INFO L130 PetriNetUnfolder]: 384/3284 cut-off events. [2023-01-28 00:55:16,776 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-01-28 00:55:16,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 3284 events. 384/3284 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 26182 event pairs, 2 based on Foata normal form. 0/2907 useless extension candidates. Maximal degree in co-relation 1846. Up to 64 conditions per place. [2023-01-28 00:55:17,185 INFO L119 LiptonReduction]: Number of co-enabled transitions 333516 [2023-01-28 00:55:38,438 WARN L222 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:55:44,153 WARN L222 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:55:50,733 WARN L222 SmtUtils]: Spent 6.57s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:55:56,834 WARN L222 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:56:47,565 WARN L222 SmtUtils]: Spent 50.50s on a formula simplification that was a NOOP. DAG size: 219 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:57:31,309 WARN L222 SmtUtils]: Spent 43.74s on a formula simplification that was a NOOP. DAG size: 215 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:58:39,714 WARN L222 SmtUtils]: Spent 1.14m on a formula simplification. DAG size of input: 225 DAG size of output: 223 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 00:59:06,107 WARN L222 SmtUtils]: Spent 26.39s on a formula simplification that was a NOOP. DAG size: 218 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 01:00:02,093 WARN L222 SmtUtils]: Spent 55.23s on a formula simplification. DAG size of input: 272 DAG size of output: 267 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 01:00:32,285 WARN L222 SmtUtils]: Spent 30.19s on a formula simplification that was a NOOP. DAG size: 263 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 01:01:28,284 WARN L222 SmtUtils]: Spent 56.00s on a formula simplification. DAG size of input: 281 DAG size of output: 274 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 01:01:52,716 WARN L222 SmtUtils]: Spent 24.43s on a formula simplification that was a NOOP. DAG size: 269 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 01:01:52,726 INFO L134 LiptonReduction]: Checked pairs total: 767633 [2023-01-28 01:01:52,726 INFO L136 LiptonReduction]: Total number of compositions: 680 [2023-01-28 01:01:52,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:01:52,728 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;@150e2ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:01:52,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 01:01:52,741 INFO L130 PetriNetUnfolder]: 33/210 cut-off events. [2023-01-28 01:01:52,741 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 01:01:52,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:01:52,741 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-01-28 01:01:52,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:01:52,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:01:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1831932705, now seen corresponding path program 1 times [2023-01-28 01:01:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:01:52,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760327602] [2023-01-28 01:01:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:01:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:01:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:01:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:01:52,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:01:52,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760327602] [2023-01-28 01:01:52,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760327602] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:01:52,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009735346] [2023-01-28 01:01:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:01:52,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:01:52,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:01:52,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:01:52,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 01:01:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:01:53,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 01:01:53,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:01:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 01:01:53,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 01:01:53,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009735346] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:01:53,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 01:01:53,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-01-28 01:01:53,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162454659] [2023-01-28 01:01:53,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:01:53,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 01:01:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:01:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 01:01:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-01-28 01:01:53,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 1399 [2023-01-28 01:01:53,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 226 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 660.8) internal successors, (3304), 5 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:01:53,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:01:53,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 1399 [2023-01-28 01:01:53,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand