/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/goblint-regression/28-race_reach_72-funloop_hard_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 01:53:55,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 01:53:55,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 01:53:55,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 01:53:55,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 01:53:55,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 01:53:55,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 01:53:55,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 01:53:55,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 01:53:55,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 01:53:55,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 01:53:55,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 01:53:55,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 01:53:55,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 01:53:55,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 01:53:55,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 01:53:55,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 01:53:55,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 01:53:55,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 01:53:55,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 01:53:55,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 01:53:55,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 01:53:55,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 01:53:55,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 01:53:55,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 01:53:55,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 01:53:55,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 01:53:55,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 01:53:55,648 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 01:53:55,672 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 01:53:55,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 01:53:55,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 01:53:55,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 01:53:55,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 01:53:55,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 01:53:55,674 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 01:53:55,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 01:53:55,675 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 01:53:55,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 01:53:55,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 01:53:55,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 01:53:55,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 01:53:55,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:53:55,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 01:53:55,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 01:53:55,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 01:53:55,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 01:53:55,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 01:53:55,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 01:53:55,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 01:53:55,677 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 01:53:55,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 01:53:55,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 01:53:55,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 01:53:55,994 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 01:53:56,002 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 01:53:56,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-01-28 01:53:57,185 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 01:53:57,413 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 01:53:57,414 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-01-28 01:53:57,439 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4416920a2/b7273d4a44c14e1ba1f65e567d356fbe/FLAGf0ce1313b [2023-01-28 01:53:57,449 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4416920a2/b7273d4a44c14e1ba1f65e567d356fbe [2023-01-28 01:53:57,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 01:53:57,451 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 01:53:57,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 01:53:57,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 01:53:57,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 01:53:57,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6186b4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57, skipping insertion in model container [2023-01-28 01:53:57,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 01:53:57,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 01:53:57,752 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_72-funloop_hard_racing.i[41323,41336] [2023-01-28 01:53:57,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:53:57,780 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 01:53:57,801 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_72-funloop_hard_racing.i[41323,41336] [2023-01-28 01:53:57,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:53:57,843 INFO L208 MainTranslator]: Completed translation [2023-01-28 01:53:57,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57 WrapperNode [2023-01-28 01:53:57,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 01:53:57,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 01:53:57,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 01:53:57,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 01:53:57,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,876 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-01-28 01:53:57,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 01:53:57,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 01:53:57,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 01:53:57,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 01:53:57,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 01:53:57,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 01:53:57,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 01:53:57,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 01:53:57,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (1/1) ... [2023-01-28 01:53:57,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:53:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:53:57,928 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 01:53:57,939 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 01:53:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 01:53:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 01:53:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 01:53:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 01:53:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 01:53:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 01:53:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 01:53:57,963 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 01:53:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 01:53:57,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 01:53:57,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 01:53:57,966 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 01:53:58,086 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 01:53:58,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 01:53:58,336 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 01:53:58,342 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 01:53:58,342 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-01-28 01:53:58,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:53:58 BoogieIcfgContainer [2023-01-28 01:53:58,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 01:53:58,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 01:53:58,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 01:53:58,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 01:53:58,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 01:53:57" (1/3) ... [2023-01-28 01:53:58,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b2c413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:53:58, skipping insertion in model container [2023-01-28 01:53:58,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:53:57" (2/3) ... [2023-01-28 01:53:58,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b2c413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:53:58, skipping insertion in model container [2023-01-28 01:53:58,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:53:58" (3/3) ... [2023-01-28 01:53:58,349 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-01-28 01:53:58,361 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 01:53:58,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-01-28 01:53:58,362 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 01:53:58,419 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 01:53:58,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 246 transitions, 500 flow [2023-01-28 01:53:58,509 INFO L130 PetriNetUnfolder]: 73/381 cut-off events. [2023-01-28 01:53:58,510 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 01:53:58,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 381 events. 73/381 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1706 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-01-28 01:53:58,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 246 transitions, 500 flow [2023-01-28 01:53:58,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 241 transitions, 487 flow [2023-01-28 01:53:58,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:53:58,530 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 241 transitions, 487 flow [2023-01-28 01:53:58,532 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 241 transitions, 487 flow [2023-01-28 01:53:58,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 241 transitions, 487 flow [2023-01-28 01:53:58,573 INFO L130 PetriNetUnfolder]: 72/376 cut-off events. [2023-01-28 01:53:58,574 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:53:58,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 376 events. 72/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1659 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-01-28 01:53:58,582 INFO L119 LiptonReduction]: Number of co-enabled transitions 19458 [2023-01-28 01:54:00,751 INFO L134 LiptonReduction]: Checked pairs total: 28650 [2023-01-28 01:54:00,751 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-01-28 01:54:00,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:54:00,767 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;@7345d115, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:54:00,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:54:00,773 INFO L130 PetriNetUnfolder]: 11/43 cut-off events. [2023-01-28 01:54:00,773 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:54:00,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:00,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 01:54:00,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:00,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash -441889917, now seen corresponding path program 1 times [2023-01-28 01:54:00,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:00,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121418620] [2023-01-28 01:54:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:00,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:00,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121418620] [2023-01-28 01:54:00,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121418620] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:54:00,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:54:00,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:54:00,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5640949] [2023-01-28 01:54:00,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:54:00,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:54:00,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:00,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:54:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:54:00,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 430 [2023-01-28 01:54:00,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 01:54:00,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:00,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 430 [2023-01-28 01:54:00,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:01,140 INFO L130 PetriNetUnfolder]: 579/1212 cut-off events. [2023-01-28 01:54:01,140 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:54:01,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 1212 events. 579/1212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6864 event pairs, 465 based on Foata normal form. 213/1209 useless extension candidates. Maximal degree in co-relation 2191. Up to 1060 conditions per place. [2023-01-28 01:54:01,144 INFO L137 encePairwiseOnDemand]: 396/430 looper letters, 22 selfloop transitions, 2 changer transitions 37/66 dead transitions. [2023-01-28 01:54:01,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 243 flow [2023-01-28 01:54:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:54:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:54:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-01-28 01:54:01,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217054263565891 [2023-01-28 01:54:01,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-01-28 01:54:01,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-01-28 01:54:01,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:01,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-01-28 01:54:01,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 01:54:01,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 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 01:54:01,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 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 01:54:01,166 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 673 transitions. [2023-01-28 01:54:01,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 243 flow [2023-01-28 01:54:01,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:54:01,170 INFO L231 Difference]: Finished difference. Result has 65 places, 29 transitions, 73 flow [2023-01-28 01:54:01,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=65, PETRI_TRANSITIONS=29} [2023-01-28 01:54:01,173 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-01-28 01:54:01,173 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 29 transitions, 73 flow [2023-01-28 01:54:01,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 01:54:01,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:01,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:54:01,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 01:54:01,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:01,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:01,175 INFO L85 PathProgramCache]: Analyzing trace with hash 584833530, now seen corresponding path program 1 times [2023-01-28 01:54:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:01,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710300370] [2023-01-28 01:54:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:01,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:01,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:01,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710300370] [2023-01-28 01:54:01,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710300370] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:01,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222057921] [2023-01-28 01:54:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:01,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:01,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:01,233 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 01:54:01,262 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 01:54:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:01,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:54:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:01,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:01,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222057921] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:01,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:01,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:54:01,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627250959] [2023-01-28 01:54:01,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:01,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:54:01,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:01,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:54:01,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:54:01,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 430 [2023-01-28 01:54:01,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 197.57142857142858) internal successors, (1383), 7 states have internal predecessors, (1383), 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 01:54:01,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:01,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 430 [2023-01-28 01:54:01,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:01,418 INFO L130 PetriNetUnfolder]: 54/139 cut-off events. [2023-01-28 01:54:01,418 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:54:01,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 139 events. 54/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 379 event pairs, 45 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 265. Up to 119 conditions per place. [2023-01-28 01:54:01,419 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 22 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-01-28 01:54:01,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 139 flow [2023-01-28 01:54:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:54:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:54:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1206 transitions. [2023-01-28 01:54:01,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2023-01-28 01:54:01,421 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1206 transitions. [2023-01-28 01:54:01,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1206 transitions. [2023-01-28 01:54:01,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:01,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1206 transitions. [2023-01-28 01:54:01,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 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 01:54:01,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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 01:54:01,429 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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 01:54:01,429 INFO L175 Difference]: Start difference. First operand has 65 places, 29 transitions, 73 flow. Second operand 6 states and 1206 transitions. [2023-01-28 01:54:01,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 139 flow [2023-01-28 01:54:01,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 135 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:01,430 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-01-28 01:54:01,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-01-28 01:54:01,431 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -25 predicate places. [2023-01-28 01:54:01,431 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-01-28 01:54:01,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 197.57142857142858) internal successors, (1383), 7 states have internal predecessors, (1383), 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 01:54:01,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:01,432 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:01,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 01:54:01,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:01,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:01,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash -451628733, now seen corresponding path program 2 times [2023-01-28 01:54:01,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:01,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361980547] [2023-01-28 01:54:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:01,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:01,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:01,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361980547] [2023-01-28 01:54:01,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361980547] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:01,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465065329] [2023-01-28 01:54:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:54:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:01,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:01,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:54:01,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 01:54:01,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:54:01,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:54:01,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:54:01,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:01,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:54:01,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465065329] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:01,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:01,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:54:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995808164] [2023-01-28 01:54:01,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:01,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:54:01,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:54:01,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:54:01,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 430 [2023-01-28 01:54:01,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 197.30769230769232) internal successors, (2565), 13 states have internal predecessors, (2565), 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 01:54:01,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:01,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 430 [2023-01-28 01:54:01,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:02,011 INFO L130 PetriNetUnfolder]: 54/145 cut-off events. [2023-01-28 01:54:02,012 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 01:54:02,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 145 events. 54/145 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 374 event pairs, 45 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 256. Up to 119 conditions per place. [2023-01-28 01:54:02,014 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 22 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-01-28 01:54:02,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 207 flow [2023-01-28 01:54:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:54:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:54:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2391 transitions. [2023-01-28 01:54:02,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633720930232558 [2023-01-28 01:54:02,018 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2391 transitions. [2023-01-28 01:54:02,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2391 transitions. [2023-01-28 01:54:02,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:02,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2391 transitions. [2023-01-28 01:54:02,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 199.25) internal successors, (2391), 12 states have internal predecessors, (2391), 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 01:54:02,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 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 01:54:02,031 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 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 01:54:02,031 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 2391 transitions. [2023-01-28 01:54:02,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 207 flow [2023-01-28 01:54:02,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 193 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:02,033 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-01-28 01:54:02,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=175, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-01-28 01:54:02,034 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-01-28 01:54:02,035 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-01-28 01:54:02,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 197.30769230769232) internal successors, (2565), 13 states have internal predecessors, (2565), 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 01:54:02,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:02,037 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:02,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 01:54:02,242 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,SelfDestructingSolverStorable2 [2023-01-28 01:54:02,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:02,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:02,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1666983395, now seen corresponding path program 3 times [2023-01-28 01:54:02,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:02,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870910387] [2023-01-28 01:54:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:02,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:02,281 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:54:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:02,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:54:02,340 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:54:02,341 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:54:02,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 01:54:02,342 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:54:02,343 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:54:02,344 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:54:02,344 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 01:54:02,368 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 01:54:02,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-01-28 01:54:02,427 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-01-28 01:54:02,428 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 01:54:02,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-01-28 01:54:02,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 317 transitions, 652 flow [2023-01-28 01:54:02,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 317 transitions, 652 flow [2023-01-28 01:54:02,436 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:54:02,436 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 317 transitions, 652 flow [2023-01-28 01:54:02,437 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 317 transitions, 652 flow [2023-01-28 01:54:02,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-01-28 01:54:02,481 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-01-28 01:54:02,481 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 01:54:02,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-01-28 01:54:02,502 INFO L119 LiptonReduction]: Number of co-enabled transitions 49956 [2023-01-28 01:54:05,114 INFO L134 LiptonReduction]: Checked pairs total: 86365 [2023-01-28 01:54:05,115 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-01-28 01:54:05,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:54:05,117 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;@7345d115, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:54:05,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:54:05,125 INFO L130 PetriNetUnfolder]: 55/157 cut-off events. [2023-01-28 01:54:05,125 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 01:54:05,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:05,125 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:05,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:05,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:05,126 INFO L85 PathProgramCache]: Analyzing trace with hash 265766007, now seen corresponding path program 1 times [2023-01-28 01:54:05,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:05,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731835889] [2023-01-28 01:54:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:05,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:05,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:05,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731835889] [2023-01-28 01:54:05,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731835889] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:54:05,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:54:05,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:54:05,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829464224] [2023-01-28 01:54:05,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:54:05,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:54:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:54:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:54:05,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 559 [2023-01-28 01:54:05,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 132 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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 01:54:05,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:05,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 559 [2023-01-28 01:54:05,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:07,046 INFO L130 PetriNetUnfolder]: 19961/30642 cut-off events. [2023-01-28 01:54:07,047 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-01-28 01:54:07,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58969 conditions, 30642 events. 19961/30642 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 212680 event pairs, 17166 based on Foata normal form. 5462/30473 useless extension candidates. Maximal degree in co-relation 20159. Up to 28224 conditions per place. [2023-01-28 01:54:07,111 INFO L137 encePairwiseOnDemand]: 516/559 looper letters, 40 selfloop transitions, 2 changer transitions 42/93 dead transitions. [2023-01-28 01:54:07,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-01-28 01:54:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:54:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:54:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2023-01-28 01:54:07,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199761478831246 [2023-01-28 01:54:07,114 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2023-01-28 01:54:07,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2023-01-28 01:54:07,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:07,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2023-01-28 01:54:07,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 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 01:54:07,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 01:54:07,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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 01:54:07,118 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 872 transitions. [2023-01-28 01:54:07,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-01-28 01:54:07,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:54:07,121 INFO L231 Difference]: Finished difference. Result has 90 places, 51 transitions, 124 flow [2023-01-28 01:54:07,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=90, PETRI_TRANSITIONS=51} [2023-01-28 01:54:07,121 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-01-28 01:54:07,121 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 51 transitions, 124 flow [2023-01-28 01:54:07,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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 01:54:07,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:07,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:54:07,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 01:54:07,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:07,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1272874103, now seen corresponding path program 1 times [2023-01-28 01:54:07,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:07,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166319769] [2023-01-28 01:54:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:07,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:07,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166319769] [2023-01-28 01:54:07,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166319769] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:07,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489928549] [2023-01-28 01:54:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:07,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:07,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:07,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:54:07,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 01:54:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:07,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:54:07,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:07,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:07,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489928549] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:07,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:07,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:54:07,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714064657] [2023-01-28 01:54:07,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:07,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:54:07,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:54:07,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:54:07,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 559 [2023-01-28 01:54:07,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 51 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 253.71428571428572) internal successors, (1776), 7 states have internal predecessors, (1776), 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 01:54:07,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:07,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 559 [2023-01-28 01:54:07,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:07,488 INFO L130 PetriNetUnfolder]: 2090/3401 cut-off events. [2023-01-28 01:54:07,488 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-01-28 01:54:07,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 3401 events. 2090/3401 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18278 event pairs, 1833 based on Foata normal form. 0/2685 useless extension candidates. Maximal degree in co-relation 6596. Up to 3127 conditions per place. [2023-01-28 01:54:07,500 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-01-28 01:54:07,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 226 flow [2023-01-28 01:54:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:54:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:54:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1560 transitions. [2023-01-28 01:54:07,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2023-01-28 01:54:07,504 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1560 transitions. [2023-01-28 01:54:07,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1560 transitions. [2023-01-28 01:54:07,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:07,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1560 transitions. [2023-01-28 01:54:07,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 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 01:54:07,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 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 01:54:07,511 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 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 01:54:07,511 INFO L175 Difference]: Start difference. First operand has 90 places, 51 transitions, 124 flow. Second operand 6 states and 1560 transitions. [2023-01-28 01:54:07,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 226 flow [2023-01-28 01:54:07,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:07,513 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 154 flow [2023-01-28 01:54:07,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-01-28 01:54:07,513 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -27 predicate places. [2023-01-28 01:54:07,513 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 154 flow [2023-01-28 01:54:07,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 253.71428571428572) internal successors, (1776), 7 states have internal predecessors, (1776), 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 01:54:07,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:07,514 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:07,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 01:54:07,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:07,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:07,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:07,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2007450743, now seen corresponding path program 2 times [2023-01-28 01:54:07,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:07,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392932590] [2023-01-28 01:54:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:07,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:07,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392932590] [2023-01-28 01:54:07,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392932590] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564689434] [2023-01-28 01:54:07,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:54:07,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:07,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:54:07,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 01:54:07,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:54:07,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:54:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:54:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:07,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:54:07,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564689434] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:07,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:07,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:54:07,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810747686] [2023-01-28 01:54:07,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:07,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:54:07,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:54:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:54:07,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 559 [2023-01-28 01:54:07,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 154 flow. Second operand has 13 states, 13 states have (on average 253.3846153846154) internal successors, (3294), 13 states have internal predecessors, (3294), 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 01:54:07,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:07,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 559 [2023-01-28 01:54:07,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:08,252 INFO L130 PetriNetUnfolder]: 2090/3407 cut-off events. [2023-01-28 01:54:08,252 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-01-28 01:54:08,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 3407 events. 2090/3407 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18322 event pairs, 1833 based on Foata normal form. 6/2698 useless extension candidates. Maximal degree in co-relation 6580. Up to 3127 conditions per place. [2023-01-28 01:54:08,265 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 40 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-01-28 01:54:08,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 292 flow [2023-01-28 01:54:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:54:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:54:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3081 transitions. [2023-01-28 01:54:08,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2023-01-28 01:54:08,271 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3081 transitions. [2023-01-28 01:54:08,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3081 transitions. [2023-01-28 01:54:08,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:08,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3081 transitions. [2023-01-28 01:54:08,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 256.75) internal successors, (3081), 12 states have internal predecessors, (3081), 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 01:54:08,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 559.0) internal successors, (7267), 13 states have internal predecessors, (7267), 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 01:54:08,284 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 559.0) internal successors, (7267), 13 states have internal predecessors, (7267), 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 01:54:08,284 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 154 flow. Second operand 12 states and 3081 transitions. [2023-01-28 01:54:08,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 292 flow [2023-01-28 01:54:08,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:08,286 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 224 flow [2023-01-28 01:54:08,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=224, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-28 01:54:08,287 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -11 predicate places. [2023-01-28 01:54:08,287 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 224 flow [2023-01-28 01:54:08,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 253.3846153846154) internal successors, (3294), 13 states have internal predecessors, (3294), 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 01:54:08,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:08,288 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:54:08,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 01:54:08,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:08,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:08,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1872804745, now seen corresponding path program 3 times [2023-01-28 01:54:08,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:08,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490205226] [2023-01-28 01:54:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:08,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:54:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:08,546 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:54:08,547 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:54:08,547 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:54:08,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 01:54:08,547 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:54:08,547 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:54:08,548 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:54:08,548 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 01:54:08,597 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 01:54:08,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-01-28 01:54:08,680 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-01-28 01:54:08,681 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 01:54:08,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-01-28 01:54:08,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 388 transitions, 806 flow [2023-01-28 01:54:08,699 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 388 transitions, 806 flow [2023-01-28 01:54:08,699 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:54:08,699 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 388 transitions, 806 flow [2023-01-28 01:54:08,699 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 388 transitions, 806 flow [2023-01-28 01:54:08,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-01-28 01:54:08,778 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-01-28 01:54:08,779 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 01:54:08,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-01-28 01:54:08,820 INFO L119 LiptonReduction]: Number of co-enabled transitions 89838 [2023-01-28 01:54:11,547 INFO L134 LiptonReduction]: Checked pairs total: 142134 [2023-01-28 01:54:11,547 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-01-28 01:54:11,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:54:11,549 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;@7345d115, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:54:11,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:54:11,560 INFO L130 PetriNetUnfolder]: 94/257 cut-off events. [2023-01-28 01:54:11,561 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 01:54:11,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:11,561 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:54:11,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:11,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash 417231055, now seen corresponding path program 1 times [2023-01-28 01:54:11,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:11,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139619901] [2023-01-28 01:54:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:11,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:54:11,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:11,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139619901] [2023-01-28 01:54:11,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139619901] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:54:11,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:54:11,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:54:11,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117274540] [2023-01-28 01:54:11,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:54:11,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:54:11,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:11,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:54:11,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:54:11,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-28 01:54:11,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 165 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 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 01:54:11,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:11,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-28 01:54:11,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:46,529 INFO L130 PetriNetUnfolder]: 477490/661421 cut-off events. [2023-01-28 01:54:46,529 INFO L131 PetriNetUnfolder]: For 4158/4158 co-relation queries the response was YES. [2023-01-28 01:54:47,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274279 conditions, 661421 events. 477490/661421 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 14829. Compared 5287189 event pairs, 422085 based on Foata normal form. 116547/658008 useless extension candidates. Maximal degree in co-relation 143396. Up to 610562 conditions per place. [2023-01-28 01:54:48,144 INFO L137 encePairwiseOnDemand]: 628/682 looper letters, 57 selfloop transitions, 2 changer transitions 43/115 dead transitions. [2023-01-28 01:54:48,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 446 flow [2023-01-28 01:54:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:54:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:54:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1069 transitions. [2023-01-28 01:54:48,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224828934506354 [2023-01-28 01:54:48,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1069 transitions. [2023-01-28 01:54:48,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1069 transitions. [2023-01-28 01:54:48,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:48,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1069 transitions. [2023-01-28 01:54:48,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.3333333333333) internal successors, (1069), 3 states have internal predecessors, (1069), 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 01:54:48,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 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 01:54:48,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 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 01:54:48,151 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 360 flow. Second operand 3 states and 1069 transitions. [2023-01-28 01:54:48,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 446 flow [2023-01-28 01:54:48,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:54:48,154 INFO L231 Difference]: Finished difference. Result has 111 places, 72 transitions, 175 flow [2023-01-28 01:54:48,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=111, PETRI_TRANSITIONS=72} [2023-01-28 01:54:48,155 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-01-28 01:54:48,155 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 72 transitions, 175 flow [2023-01-28 01:54:48,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 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 01:54:48,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:48,155 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:54:48,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 01:54:48,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:48,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1916916671, now seen corresponding path program 1 times [2023-01-28 01:54:48,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:48,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577903676] [2023-01-28 01:54:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:48,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:54:48,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:48,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577903676] [2023-01-28 01:54:48,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577903676] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:48,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256872953] [2023-01-28 01:54:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:48,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:48,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:48,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:54:48,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 01:54:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:54:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:54:48,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:54:48,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256872953] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:48,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:48,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:54:48,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215895839] [2023-01-28 01:54:48,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:48,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:54:48,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:54:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:54:48,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-28 01:54:48,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 72 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 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 01:54:48,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:48,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-28 01:54:48,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:51,912 INFO L130 PetriNetUnfolder]: 52726/74726 cut-off events. [2023-01-28 01:54:51,912 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2023-01-28 01:54:52,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144813 conditions, 74726 events. 52726/74726 cut-off events. For 1909/1909 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 500650 event pairs, 46777 based on Foata normal form. 0/59675 useless extension candidates. Maximal degree in co-relation 144799. Up to 68679 conditions per place. [2023-01-28 01:54:52,183 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 57 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-01-28 01:54:52,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 311 flow [2023-01-28 01:54:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:54:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:54:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1913 transitions. [2023-01-28 01:54:52,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4674975562072336 [2023-01-28 01:54:52,187 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1913 transitions. [2023-01-28 01:54:52,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1913 transitions. [2023-01-28 01:54:52,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:52,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1913 transitions. [2023-01-28 01:54:52,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 318.8333333333333) internal successors, (1913), 6 states have internal predecessors, (1913), 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 01:54:52,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 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 01:54:52,194 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 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 01:54:52,194 INFO L175 Difference]: Start difference. First operand has 111 places, 72 transitions, 175 flow. Second operand 6 states and 1913 transitions. [2023-01-28 01:54:52,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 311 flow [2023-01-28 01:54:52,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 301 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:52,197 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 201 flow [2023-01-28 01:54:52,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-01-28 01:54:52,198 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -27 predicate places. [2023-01-28 01:54:52,198 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 201 flow [2023-01-28 01:54:52,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 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 01:54:52,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:52,198 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:54:52,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 01:54:52,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 01:54:52,405 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:52,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash 135769295, now seen corresponding path program 2 times [2023-01-28 01:54:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:52,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313496859] [2023-01-28 01:54:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:52,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:54:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:54:52,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:54:52,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313496859] [2023-01-28 01:54:52,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313496859] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:54:52,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776185513] [2023-01-28 01:54:52,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:54:52,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:52,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:54:52,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:54:52,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 01:54:52,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:54:52,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:54:52,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:54:52,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:54:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:54:52,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:54:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:54:52,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776185513] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:54:52,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:54:52,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:54:52,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690840241] [2023-01-28 01:54:52,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:54:52,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:54:52,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:54:52,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:54:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:54:52,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-28 01:54:52,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 309.46153846153845) internal successors, (4023), 13 states have internal predecessors, (4023), 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 01:54:52,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:54:52,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-28 01:54:52,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:54:56,386 INFO L130 PetriNetUnfolder]: 52726/74732 cut-off events. [2023-01-28 01:54:56,386 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-01-28 01:54:56,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144410 conditions, 74732 events. 52726/74732 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 500798 event pairs, 46777 based on Foata normal form. 6/59688 useless extension candidates. Maximal degree in co-relation 144350. Up to 68679 conditions per place. [2023-01-28 01:54:56,705 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 57 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-01-28 01:54:56,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 373 flow [2023-01-28 01:54:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:54:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:54:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3770 transitions. [2023-01-28 01:54:56,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46065493646138805 [2023-01-28 01:54:56,719 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3770 transitions. [2023-01-28 01:54:56,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3770 transitions. [2023-01-28 01:54:56,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:54:56,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3770 transitions. [2023-01-28 01:54:56,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 314.1666666666667) internal successors, (3770), 12 states have internal predecessors, (3770), 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 01:54:56,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 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 01:54:56,762 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 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 01:54:56,762 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 201 flow. Second operand 12 states and 3770 transitions. [2023-01-28 01:54:56,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 373 flow [2023-01-28 01:54:56,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 81 transitions, 359 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:54:56,764 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 271 flow [2023-01-28 01:54:56,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=271, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-01-28 01:54:56,765 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -11 predicate places. [2023-01-28 01:54:56,765 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 271 flow [2023-01-28 01:54:56,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 309.46153846153845) internal successors, (4023), 13 states have internal predecessors, (4023), 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 01:54:56,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:54:56,766 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:54:56,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 01:54:56,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:54:56,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:54:56,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:54:56,971 INFO L85 PathProgramCache]: Analyzing trace with hash 562120399, now seen corresponding path program 3 times [2023-01-28 01:54:56,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:54:56,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354902369] [2023-01-28 01:54:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:54:56,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:54:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:56,991 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:54:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:54:57,016 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:54:57,016 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:54:57,016 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:54:57,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 01:54:57,016 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:54:57,017 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:54:57,017 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:54:57,017 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 01:54:57,043 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 01:54:57,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-01-28 01:54:57,145 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-01-28 01:54:57,145 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 01:54:57,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-01-28 01:54:57,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 459 transitions, 962 flow [2023-01-28 01:54:57,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 378 places, 459 transitions, 962 flow [2023-01-28 01:54:57,171 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:54:57,171 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 459 transitions, 962 flow [2023-01-28 01:54:57,171 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 459 transitions, 962 flow [2023-01-28 01:54:57,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-01-28 01:54:57,273 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-01-28 01:54:57,273 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 01:54:57,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-01-28 01:54:57,370 INFO L119 LiptonReduction]: Number of co-enabled transitions 139656 [2023-01-28 01:55:00,621 INFO L134 LiptonReduction]: Checked pairs total: 247744 [2023-01-28 01:55:00,621 INFO L136 LiptonReduction]: Total number of compositions: 348 [2023-01-28 01:55:00,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:55:00,623 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;@7345d115, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:55:00,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:55:00,637 INFO L130 PetriNetUnfolder]: 132/358 cut-off events. [2023-01-28 01:55:00,637 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-01-28 01:55:00,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:00,637 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:00,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:00,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:00,638 INFO L85 PathProgramCache]: Analyzing trace with hash 711047105, now seen corresponding path program 1 times [2023-01-28 01:55:00,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:00,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831055631] [2023-01-28 01:55:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:00,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-28 01:55:00,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:00,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831055631] [2023-01-28 01:55:00,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831055631] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:55:00,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:55:00,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:55:00,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617386277] [2023-01-28 01:55:00,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:55:00,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:55:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:00,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:55:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:55:00,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 807 [2023-01-28 01:55:00,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 198 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 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 01:55:00,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:00,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 807 [2023-01-28 01:55:00,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand