/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.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 06:42:45,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 06:42:46,035 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 06:42:46,040 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 06:42:46,041 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 06:42:46,077 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 06:42:46,077 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 06:42:46,078 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 06:42:46,078 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 06:42:46,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 06:42:46,082 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 06:42:46,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 06:42:46,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 06:42:46,084 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 06:42:46,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 06:42:46,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 06:42:46,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 06:42:46,085 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 06:42:46,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 06:42:46,085 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 06:42:46,085 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 06:42:46,086 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 06:42:46,086 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 06:42:46,086 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 06:42:46,087 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 06:42:46,087 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 06:42:46,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 06:42:46,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:42:46,088 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 06:42:46,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 06:42:46,089 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 06:42:46,089 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 06:42:46,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 06:42:46,089 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 06:42:46,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 06:42:46,090 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 06:42:46,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 06:42:46,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 06:42:46,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 06:42:46,430 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 06:42:46,430 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 06:42:46,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-24 06:42:47,731 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 06:42:48,042 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 06:42:48,043 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-24 06:42:48,065 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6a4fc6f/5984618f33cb4fddad9851c132f7caa0/FLAG0fad26a63 [2023-08-24 06:42:48,082 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6a4fc6f/5984618f33cb4fddad9851c132f7caa0 [2023-08-24 06:42:48,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 06:42:48,089 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 06:42:48,092 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 06:42:48,092 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 06:42:48,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 06:42:48,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6738184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48, skipping insertion in model container [2023-08-24 06:42:48,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,158 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 06:42:48,566 WARN L240 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_70-funloop_racefree.i[41323,41336] [2023-08-24 06:42:48,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:42:48,613 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 06:42:48,640 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:42:48,642 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:42:48,648 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-24 06:42:48,659 WARN L240 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_70-funloop_racefree.i[41323,41336] [2023-08-24 06:42:48,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:42:48,741 INFO L206 MainTranslator]: Completed translation [2023-08-24 06:42:48,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48 WrapperNode [2023-08-24 06:42:48,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 06:42:48,742 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 06:42:48,742 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 06:42:48,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 06:42:48,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,780 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,812 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 198 [2023-08-24 06:42:48,812 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 06:42:48,813 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 06:42:48,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 06:42:48,813 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 06:42:48,821 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,845 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,849 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,851 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 06:42:48,867 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 06:42:48,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 06:42:48,867 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 06:42:48,868 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (1/1) ... [2023-08-24 06:42:48,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:42:48,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:42:48,898 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) [2023-08-24 06:42:48,905 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 [2023-08-24 06:42:48,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 06:42:48,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 06:42:48,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 06:42:48,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 06:42:48,936 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 06:42:48,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 06:42:48,936 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 06:42:48,936 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 06:42:48,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 06:42:48,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 06:42:48,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 06:42:48,938 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 06:42:49,045 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 06:42:49,047 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 06:42:49,292 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 06:42:49,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 06:42:49,298 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-08-24 06:42:49,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:42:49 BoogieIcfgContainer [2023-08-24 06:42:49,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 06:42:49,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 06:42:49,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 06:42:49,308 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 06:42:49,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:42:48" (1/3) ... [2023-08-24 06:42:49,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362ccc55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:42:49, skipping insertion in model container [2023-08-24 06:42:49,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:42:48" (2/3) ... [2023-08-24 06:42:49,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362ccc55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:42:49, skipping insertion in model container [2023-08-24 06:42:49,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:42:49" (3/3) ... [2023-08-24 06:42:49,311 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-08-24 06:42:49,325 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 06:42:49,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 06:42:49,326 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 06:42:49,402 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 06:42:49,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 195 transitions, 398 flow [2023-08-24 06:42:49,552 INFO L124 PetriNetUnfolderBase]: 49/278 cut-off events. [2023-08-24 06:42:49,553 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 06:42:49,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 278 events. 49/278 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 982 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2023-08-24 06:42:49,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 195 transitions, 398 flow [2023-08-24 06:42:49,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 190 transitions, 385 flow [2023-08-24 06:42:49,570 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:42:49,581 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 190 transitions, 385 flow [2023-08-24 06:42:49,583 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 190 transitions, 385 flow [2023-08-24 06:42:49,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 190 transitions, 385 flow [2023-08-24 06:42:49,647 INFO L124 PetriNetUnfolderBase]: 48/273 cut-off events. [2023-08-24 06:42:49,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:42:49,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 273 events. 48/273 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 933 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2023-08-24 06:42:49,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 12282 [2023-08-24 06:42:52,308 INFO L134 LiptonReduction]: Checked pairs total: 18484 [2023-08-24 06:42:52,308 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-24 06:42:52,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:42:52,330 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;@1aaca4c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:42:52,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:42:52,335 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:42:52,335 INFO L124 PetriNetUnfolderBase]: 9/29 cut-off events. [2023-08-24 06:42:52,335 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:42:52,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:42:52,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-24 06:42:52,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:42:52,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:42:52,340 INFO L85 PathProgramCache]: Analyzing trace with hash 881123594, now seen corresponding path program 1 times [2023-08-24 06:42:52,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:42:52,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864728766] [2023-08-24 06:42:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:42:52,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:42:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:42:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:42:52,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:42:52,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864728766] [2023-08-24 06:42:52,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864728766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:42:52,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:42:52,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:42:52,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059797552] [2023-08-24 06:42:52,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:42:52,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:42:52,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:42:52,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:42:52,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:42:52,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 348 [2023-08-24 06:42:52,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 70 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:42:52,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:42:52,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 348 [2023-08-24 06:42:52,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:42:52,776 INFO L124 PetriNetUnfolderBase]: 380/772 cut-off events. [2023-08-24 06:42:52,776 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:42:52,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 772 events. 380/772 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3504 event pairs, 306 based on Foata normal form. 76/711 useless extension candidates. Maximal degree in co-relation 1428. Up to 707 conditions per place. [2023-08-24 06:42:52,779 INFO L140 encePairwiseOnDemand]: 322/348 looper letters, 24 selfloop transitions, 2 changer transitions 19/48 dead transitions. [2023-08-24 06:42:52,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 185 flow [2023-08-24 06:42:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:42:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:42:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-08-24 06:42:52,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114942528735632 [2023-08-24 06:42:52,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-08-24 06:42:52,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-08-24 06:42:52,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:42:52,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-08-24 06:42:52,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:42:52,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 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) [2023-08-24 06:42:52,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 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) [2023-08-24 06:42:52,809 INFO L175 Difference]: Start difference. First operand has 46 places, 70 transitions, 145 flow. Second operand 3 states and 534 transitions. [2023-08-24 06:42:52,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 185 flow [2023-08-24 06:42:52,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 185 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:42:52,813 INFO L231 Difference]: Finished difference. Result has 48 places, 29 transitions, 73 flow [2023-08-24 06:42:52,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=48, PETRI_TRANSITIONS=29} [2023-08-24 06:42:52,818 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-24 06:42:52,818 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 29 transitions, 73 flow [2023-08-24 06:42:52,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:42:52,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:42:52,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 06:42:52,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 06:42:52,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:42:52,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:42:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1352906050, now seen corresponding path program 1 times [2023-08-24 06:42:52,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:42:52,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445449804] [2023-08-24 06:42:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:42:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:42:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:42:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:42:52,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:42:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445449804] [2023-08-24 06:42:52,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445449804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:42:52,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969571918] [2023-08-24 06:42:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:42:52,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:42:52,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:42:52,922 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) [2023-08-24 06:42:53,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 06:42:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:42:53,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:42:53,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:42:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:42:53,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:42:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:42:53,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969571918] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:42:53,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:42:53,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:42:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747092122] [2023-08-24 06:42:53,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:42:53,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:42:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:42:53,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:42:53,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:42:53,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 348 [2023-08-24 06:42:53,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 157.57142857142858) internal successors, (1103), 7 states have internal predecessors, (1103), 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) [2023-08-24 06:42:53,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:42:53,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 348 [2023-08-24 06:42:53,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:42:53,468 INFO L124 PetriNetUnfolderBase]: 60/146 cut-off events. [2023-08-24 06:42:53,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:42:53,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 146 events. 60/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 399 event pairs, 51 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 287. Up to 133 conditions per place. [2023-08-24 06:42:53,469 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 24 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-24 06:42:53,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 143 flow [2023-08-24 06:42:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:42:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:42:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 968 transitions. [2023-08-24 06:42:53,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46360153256704983 [2023-08-24 06:42:53,473 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 968 transitions. [2023-08-24 06:42:53,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 968 transitions. [2023-08-24 06:42:53,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:42:53,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 968 transitions. [2023-08-24 06:42:53,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 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) [2023-08-24 06:42:53,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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) [2023-08-24 06:42:53,482 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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) [2023-08-24 06:42:53,482 INFO L175 Difference]: Start difference. First operand has 48 places, 29 transitions, 73 flow. Second operand 6 states and 968 transitions. [2023-08-24 06:42:53,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 143 flow [2023-08-24 06:42:53,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 06:42:53,483 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-08-24 06:42:53,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, 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} [2023-08-24 06:42:53,484 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -8 predicate places. [2023-08-24 06:42:53,484 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-08-24 06:42:53,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.57142857142858) internal successors, (1103), 7 states have internal predecessors, (1103), 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) [2023-08-24 06:42:53,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:42:53,485 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-24 06:42:53,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 06:42:53,692 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 [2023-08-24 06:42:53,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:42:53,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:42:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1347145974, now seen corresponding path program 2 times [2023-08-24 06:42:53,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:42:53,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640599708] [2023-08-24 06:42:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:42:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:42:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:42:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:42:53,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:42:53,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640599708] [2023-08-24 06:42:53,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640599708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:42:53,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884088520] [2023-08-24 06:42:53,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:42:53,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:42:53,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:42:53,810 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) [2023-08-24 06:42:53,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 06:42:53,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:42:53,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:42:53,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:42:53,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:42:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:42:53,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:42:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:42:53,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884088520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:42:53,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:42:53,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:42:53,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521157658] [2023-08-24 06:42:53,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:42:53,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:42:53,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:42:53,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:42:53,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:42:53,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 348 [2023-08-24 06:42:53,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 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) [2023-08-24 06:42:53,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:42:53,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 348 [2023-08-24 06:42:53,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:42:54,048 INFO L124 PetriNetUnfolderBase]: 60/152 cut-off events. [2023-08-24 06:42:54,049 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-24 06:42:54,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 152 events. 60/152 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 395 event pairs, 51 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 278. Up to 133 conditions per place. [2023-08-24 06:42:54,050 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 24 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-08-24 06:42:54,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 211 flow [2023-08-24 06:42:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:42:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:42:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1913 transitions. [2023-08-24 06:42:54,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4580938697318008 [2023-08-24 06:42:54,055 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1913 transitions. [2023-08-24 06:42:54,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1913 transitions. [2023-08-24 06:42:54,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:42:54,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1913 transitions. [2023-08-24 06:42:54,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.41666666666666) internal successors, (1913), 12 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) [2023-08-24 06:42:54,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 348.0) internal successors, (4524), 13 states have internal predecessors, (4524), 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) [2023-08-24 06:42:54,069 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 348.0) internal successors, (4524), 13 states have internal predecessors, (4524), 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) [2023-08-24 06:42:54,069 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 1913 transitions. [2023-08-24 06:42:54,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 211 flow [2023-08-24 06:42:54,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 197 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:42:54,072 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-08-24 06:42:54,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, 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} [2023-08-24 06:42:54,073 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-24 06:42:54,073 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-08-24 06:42:54,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 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) [2023-08-24 06:42:54,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:42:54,074 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-24 06:42:54,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 06:42:54,280 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 [2023-08-24 06:42:54,280 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:42:54,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:42:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1727005706, now seen corresponding path program 3 times [2023-08-24 06:42:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:42:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953431025] [2023-08-24 06:42:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:42:54,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:42:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:42:54,311 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:42:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:42:54,343 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:42:54,344 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:42:54,344 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:42:54,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 06:42:54,346 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:42:54,347 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:42:54,348 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:42:54,348 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 06:42:54,386 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 06:42:54,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 266 transitions, 550 flow [2023-08-24 06:42:54,444 INFO L124 PetriNetUnfolderBase]: 82/457 cut-off events. [2023-08-24 06:42:54,444 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 06:42:54,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 457 events. 82/457 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2002 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 280. Up to 12 conditions per place. [2023-08-24 06:42:54,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 266 transitions, 550 flow [2023-08-24 06:42:54,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 266 transitions, 550 flow [2023-08-24 06:42:54,452 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:42:54,452 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 266 transitions, 550 flow [2023-08-24 06:42:54,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 266 transitions, 550 flow [2023-08-24 06:42:54,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 266 transitions, 550 flow [2023-08-24 06:42:54,501 INFO L124 PetriNetUnfolderBase]: 82/457 cut-off events. [2023-08-24 06:42:54,501 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 06:42:54,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 457 events. 82/457 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2002 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 280. Up to 12 conditions per place. [2023-08-24 06:42:54,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 35604 [2023-08-24 06:42:57,271 INFO L134 LiptonReduction]: Checked pairs total: 53318 [2023-08-24 06:42:57,271 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-08-24 06:42:57,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:42:57,274 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;@1aaca4c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:42:57,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:42:57,281 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:42:57,281 INFO L124 PetriNetUnfolderBase]: 39/113 cut-off events. [2023-08-24 06:42:57,281 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 06:42:57,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:42:57,281 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:42:57,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:42:57,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:42:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1703552633, now seen corresponding path program 1 times [2023-08-24 06:42:57,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:42:57,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257621480] [2023-08-24 06:42:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:42:57,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:42:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:42:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:42:57,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:42:57,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257621480] [2023-08-24 06:42:57,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257621480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:42:57,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:42:57,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:42:57,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226516534] [2023-08-24 06:42:57,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:42:57,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:42:57,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:42:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:42:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:42:57,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 471 [2023-08-24 06:42:57,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 106 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-08-24 06:42:57,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:42:57,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 471 [2023-08-24 06:42:57,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:42:58,837 INFO L124 PetriNetUnfolderBase]: 12109/18691 cut-off events. [2023-08-24 06:42:58,837 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-24 06:42:58,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35981 conditions, 18691 events. 12109/18691 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 120109 event pairs, 10328 based on Foata normal form. 3243/18283 useless extension candidates. Maximal degree in co-relation 12239. Up to 17187 conditions per place. [2023-08-24 06:42:58,891 INFO L140 encePairwiseOnDemand]: 437/471 looper letters, 40 selfloop transitions, 2 changer transitions 25/76 dead transitions. [2023-08-24 06:42:58,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 294 flow [2023-08-24 06:42:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:42:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:42:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-24 06:42:58,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166312809624911 [2023-08-24 06:42:58,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-24 06:42:58,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-24 06:42:58,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:42:58,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-24 06:42:58,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 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) [2023-08-24 06:42:58,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 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) [2023-08-24 06:42:58,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 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) [2023-08-24 06:42:58,899 INFO L175 Difference]: Start difference. First operand has 71 places, 106 transitions, 230 flow. Second operand 3 states and 730 transitions. [2023-08-24 06:42:58,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 294 flow [2023-08-24 06:42:58,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:42:58,904 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 124 flow [2023-08-24 06:42:58,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2023-08-24 06:42:58,906 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-24 06:42:58,906 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 124 flow [2023-08-24 06:42:58,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-08-24 06:42:58,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:42:58,907 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-24 06:42:58,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 06:42:58,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:42:58,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:42:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1459253906, now seen corresponding path program 1 times [2023-08-24 06:42:58,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:42:58,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243006064] [2023-08-24 06:42:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:42:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:42:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:42:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:42:58,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:42:58,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243006064] [2023-08-24 06:42:58,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243006064] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:42:58,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032737425] [2023-08-24 06:42:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:42:58,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:42:58,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:42:58,973 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) [2023-08-24 06:42:59,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 06:42:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:42:59,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:42:59,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:42:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:42:59,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:42:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:42:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032737425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:42:59,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:42:59,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:42:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956065319] [2023-08-24 06:42:59,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:42:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:42:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:42:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:42:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:42:59,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 471 [2023-08-24 06:42:59,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 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) [2023-08-24 06:42:59,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:42:59,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 471 [2023-08-24 06:42:59,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:42:59,378 INFO L124 PetriNetUnfolderBase]: 2090/3401 cut-off events. [2023-08-24 06:42:59,379 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-24 06:42:59,385 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 18269 event pairs, 1833 based on Foata normal form. 0/2684 useless extension candidates. Maximal degree in co-relation 6596. Up to 3127 conditions per place. [2023-08-24 06:42:59,402 INFO L140 encePairwiseOnDemand]: 468/471 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-08-24 06:42:59,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 226 flow [2023-08-24 06:42:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:42:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:42:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1320 transitions. [2023-08-24 06:42:59,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46709129511677283 [2023-08-24 06:42:59,406 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1320 transitions. [2023-08-24 06:42:59,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1320 transitions. [2023-08-24 06:42:59,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:42:59,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1320 transitions. [2023-08-24 06:42:59,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 220.0) internal successors, (1320), 6 states have internal predecessors, (1320), 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) [2023-08-24 06:42:59,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 471.0) internal successors, (3297), 7 states have internal predecessors, (3297), 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) [2023-08-24 06:42:59,414 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 471.0) internal successors, (3297), 7 states have internal predecessors, (3297), 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) [2023-08-24 06:42:59,414 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 124 flow. Second operand 6 states and 1320 transitions. [2023-08-24 06:42:59,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 226 flow [2023-08-24 06:42:59,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 06:42:59,417 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 154 flow [2023-08-24 06:42:59,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, 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} [2023-08-24 06:42:59,420 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2023-08-24 06:42:59,420 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 154 flow [2023-08-24 06:42:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 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) [2023-08-24 06:42:59,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:42:59,421 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:42:59,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 06:42:59,632 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 [2023-08-24 06:42:59,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:42:59,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:42:59,633 INFO L85 PathProgramCache]: Analyzing trace with hash -480689081, now seen corresponding path program 2 times [2023-08-24 06:42:59,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:42:59,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533280563] [2023-08-24 06:42:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:42:59,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:42:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:42:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:42:59,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:42:59,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533280563] [2023-08-24 06:42:59,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533280563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:42:59,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544513673] [2023-08-24 06:42:59,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:42:59,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:42:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:42:59,748 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) [2023-08-24 06:42:59,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 06:42:59,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:42:59,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:42:59,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:42:59,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:42:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:42:59,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:42:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:42:59,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544513673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:42:59,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:42:59,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:42:59,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280225992] [2023-08-24 06:42:59,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:42:59,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:42:59,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:42:59,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:42:59,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:42:59,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 471 [2023-08-24 06:42:59,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 154 flow. Second operand has 13 states, 13 states have (on average 213.3846153846154) internal successors, (2774), 13 states have internal predecessors, (2774), 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) [2023-08-24 06:42:59,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:42:59,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 471 [2023-08-24 06:42:59,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:43:00,243 INFO L124 PetriNetUnfolderBase]: 2090/3407 cut-off events. [2023-08-24 06:43:00,243 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-08-24 06:43:00,250 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 18271 event pairs, 1833 based on Foata normal form. 6/2697 useless extension candidates. Maximal degree in co-relation 6580. Up to 3127 conditions per place. [2023-08-24 06:43:00,262 INFO L140 encePairwiseOnDemand]: 468/471 looper letters, 40 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-08-24 06:43:00,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 292 flow [2023-08-24 06:43:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:43:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:43:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2601 transitions. [2023-08-24 06:43:00,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601910828025478 [2023-08-24 06:43:00,269 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2601 transitions. [2023-08-24 06:43:00,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2601 transitions. [2023-08-24 06:43:00,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:43:00,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2601 transitions. [2023-08-24 06:43:00,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 216.75) internal successors, (2601), 12 states have internal predecessors, (2601), 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) [2023-08-24 06:43:00,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 states have internal predecessors, (6123), 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) [2023-08-24 06:43:00,285 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 471.0) internal successors, (6123), 13 states have internal predecessors, (6123), 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) [2023-08-24 06:43:00,285 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 154 flow. Second operand 12 states and 2601 transitions. [2023-08-24 06:43:00,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 292 flow [2023-08-24 06:43:00,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:43:00,288 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 224 flow [2023-08-24 06:43:00,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, 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} [2023-08-24 06:43:00,289 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-08-24 06:43:00,289 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 224 flow [2023-08-24 06:43:00,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 213.3846153846154) internal successors, (2774), 13 states have internal predecessors, (2774), 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) [2023-08-24 06:43:00,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:43:00,290 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:43:00,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 06:43:00,495 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 [2023-08-24 06:43:00,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:43:00,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:43:00,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1667952537, now seen corresponding path program 3 times [2023-08-24 06:43:00,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:43:00,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551961239] [2023-08-24 06:43:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:43:00,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:43:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:43:00,528 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:43:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:43:00,557 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:43:00,557 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:43:00,557 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:43:00,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 06:43:00,558 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:43:00,558 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:43:00,558 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:43:00,558 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 06:43:00,601 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 06:43:00,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 337 transitions, 704 flow [2023-08-24 06:43:00,703 INFO L124 PetriNetUnfolderBase]: 120/669 cut-off events. [2023-08-24 06:43:00,704 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 06:43:00,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 669 events. 120/669 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3198 event pairs, 1 based on Foata normal form. 0/538 useless extension candidates. Maximal degree in co-relation 465. Up to 16 conditions per place. [2023-08-24 06:43:00,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 337 transitions, 704 flow [2023-08-24 06:43:00,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 337 transitions, 704 flow [2023-08-24 06:43:00,717 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:43:00,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 337 transitions, 704 flow [2023-08-24 06:43:00,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 337 transitions, 704 flow [2023-08-24 06:43:00,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 337 transitions, 704 flow [2023-08-24 06:43:00,780 INFO L124 PetriNetUnfolderBase]: 120/669 cut-off events. [2023-08-24 06:43:00,780 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 06:43:00,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 669 events. 120/669 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3198 event pairs, 1 based on Foata normal form. 0/538 useless extension candidates. Maximal degree in co-relation 465. Up to 16 conditions per place. [2023-08-24 06:43:00,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 68310 [2023-08-24 06:43:04,141 INFO L134 LiptonReduction]: Checked pairs total: 105146 [2023-08-24 06:43:04,141 INFO L136 LiptonReduction]: Total number of compositions: 261 [2023-08-24 06:43:04,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:43:04,143 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;@1aaca4c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:43:04,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:43:04,153 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:43:04,154 INFO L124 PetriNetUnfolderBase]: 62/181 cut-off events. [2023-08-24 06:43:04,154 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 06:43:04,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:43:04,154 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:43:04,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:43:04,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:43:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1574839875, now seen corresponding path program 1 times [2023-08-24 06:43:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:43:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087975228] [2023-08-24 06:43:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:43:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:43:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:43:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:43:04,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:43:04,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087975228] [2023-08-24 06:43:04,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087975228] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:43:04,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:43:04,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:43:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215789494] [2023-08-24 06:43:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:43:04,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:43:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:43:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:43:04,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:43:04,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 598 [2023-08-24 06:43:04,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 138 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 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) [2023-08-24 06:43:04,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:43:04,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 598 [2023-08-24 06:43:04,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:43:27,411 INFO L124 PetriNetUnfolderBase]: 292031/404805 cut-off events. [2023-08-24 06:43:27,412 INFO L125 PetriNetUnfolderBase]: For 4196/4196 co-relation queries the response was YES. [2023-08-24 06:43:28,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780322 conditions, 404805 events. 292031/404805 cut-off events. For 4196/4196 co-relation queries the response was YES. Maximal size of possible extension queue 8958. Compared 3062387 event pairs, 255919 based on Foata normal form. 69863/397825 useless extension candidates. Maximal degree in co-relation 87052. Up to 373221 conditions per place. [2023-08-24 06:43:28,418 INFO L140 encePairwiseOnDemand]: 554/598 looper letters, 57 selfloop transitions, 2 changer transitions 26/98 dead transitions. [2023-08-24 06:43:28,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 98 transitions, 386 flow [2023-08-24 06:43:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:43:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:43:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 926 transitions. [2023-08-24 06:43:28,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5161649944258639 [2023-08-24 06:43:28,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 926 transitions. [2023-08-24 06:43:28,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 926 transitions. [2023-08-24 06:43:28,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:43:28,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 926 transitions. [2023-08-24 06:43:28,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 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) [2023-08-24 06:43:28,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 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) [2023-08-24 06:43:28,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 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) [2023-08-24 06:43:28,431 INFO L175 Difference]: Start difference. First operand has 92 places, 138 transitions, 306 flow. Second operand 3 states and 926 transitions. [2023-08-24 06:43:28,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 98 transitions, 386 flow [2023-08-24 06:43:28,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:43:28,435 INFO L231 Difference]: Finished difference. Result has 95 places, 72 transitions, 175 flow [2023-08-24 06:43:28,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=95, PETRI_TRANSITIONS=72} [2023-08-24 06:43:28,436 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2023-08-24 06:43:28,436 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 72 transitions, 175 flow [2023-08-24 06:43:28,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 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) [2023-08-24 06:43:28,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:43:28,437 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:43:28,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 06:43:28,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:43:28,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:43:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash -444370129, now seen corresponding path program 1 times [2023-08-24 06:43:28,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:43:28,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068950916] [2023-08-24 06:43:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:43:28,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:43:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:43:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:43:28,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:43:28,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068950916] [2023-08-24 06:43:28,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068950916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:43:28,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489852045] [2023-08-24 06:43:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:43:28,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:43:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:43:28,493 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) [2023-08-24 06:43:28,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 06:43:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:43:28,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:43:28,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:43:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:43:28,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:43:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:43:28,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489852045] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:43:28,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:43:28,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:43:28,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448962121] [2023-08-24 06:43:28,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:43:28,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:43:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:43:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:43:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:43:28,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 598 [2023-08-24 06:43:28,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 72 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 269.85714285714283) internal successors, (1889), 7 states have internal predecessors, (1889), 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) [2023-08-24 06:43:28,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:43:28,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 598 [2023-08-24 06:43:28,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:43:32,573 INFO L124 PetriNetUnfolderBase]: 52726/74726 cut-off events. [2023-08-24 06:43:32,574 INFO L125 PetriNetUnfolderBase]: For 1909/1909 co-relation queries the response was YES. [2023-08-24 06:43:32,698 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 1967. Compared 500721 event pairs, 46777 based on Foata normal form. 0/59674 useless extension candidates. Maximal degree in co-relation 144799. Up to 68679 conditions per place. [2023-08-24 06:43:32,861 INFO L140 encePairwiseOnDemand]: 595/598 looper letters, 57 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-08-24 06:43:32,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 311 flow [2023-08-24 06:43:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:43:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:43:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1673 transitions. [2023-08-24 06:43:32,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46627647714604237 [2023-08-24 06:43:32,866 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1673 transitions. [2023-08-24 06:43:32,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1673 transitions. [2023-08-24 06:43:32,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:43:32,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1673 transitions. [2023-08-24 06:43:32,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 278.8333333333333) internal successors, (1673), 6 states have internal predecessors, (1673), 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) [2023-08-24 06:43:32,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 598.0) internal successors, (4186), 7 states have internal predecessors, (4186), 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) [2023-08-24 06:43:32,875 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 598.0) internal successors, (4186), 7 states have internal predecessors, (4186), 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) [2023-08-24 06:43:32,875 INFO L175 Difference]: Start difference. First operand has 95 places, 72 transitions, 175 flow. Second operand 6 states and 1673 transitions. [2023-08-24 06:43:32,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 311 flow [2023-08-24 06:43:32,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 301 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 06:43:32,878 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 201 flow [2023-08-24 06:43:32,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, 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} [2023-08-24 06:43:32,878 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -11 predicate places. [2023-08-24 06:43:32,878 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 201 flow [2023-08-24 06:43:32,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 269.85714285714283) internal successors, (1889), 7 states have internal predecessors, (1889), 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) [2023-08-24 06:43:32,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:43:32,879 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:43:32,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 06:43:33,083 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 [2023-08-24 06:43:33,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:43:33,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:43:33,084 INFO L85 PathProgramCache]: Analyzing trace with hash 980788797, now seen corresponding path program 2 times [2023-08-24 06:43:33,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:43:33,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929876498] [2023-08-24 06:43:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:43:33,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:43:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:43:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:43:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:43:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929876498] [2023-08-24 06:43:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929876498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:43:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214073930] [2023-08-24 06:43:33,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:43:33,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:43:33,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:43:33,161 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) [2023-08-24 06:43:33,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 06:43:33,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:43:33,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:43:33,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:43:33,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:43:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:43:33,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:43:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:43:33,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214073930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:43:33,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:43:33,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:43:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045695442] [2023-08-24 06:43:33,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:43:33,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:43:33,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:43:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:43:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:43:33,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 598 [2023-08-24 06:43:33,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 269.46153846153845) internal successors, (3503), 13 states have internal predecessors, (3503), 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) [2023-08-24 06:43:33,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:43:33,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 598 [2023-08-24 06:43:33,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:43:37,728 INFO L124 PetriNetUnfolderBase]: 52726/74732 cut-off events. [2023-08-24 06:43:37,728 INFO L125 PetriNetUnfolderBase]: For 868/868 co-relation queries the response was YES. [2023-08-24 06:43:37,898 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 1964. Compared 500964 event pairs, 46777 based on Foata normal form. 6/59687 useless extension candidates. Maximal degree in co-relation 144350. Up to 68679 conditions per place. [2023-08-24 06:43:38,062 INFO L140 encePairwiseOnDemand]: 595/598 looper letters, 57 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-08-24 06:43:38,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 373 flow [2023-08-24 06:43:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:43:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:43:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3290 transitions. [2023-08-24 06:43:38,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584726867335563 [2023-08-24 06:43:38,069 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3290 transitions. [2023-08-24 06:43:38,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3290 transitions. [2023-08-24 06:43:38,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:43:38,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3290 transitions. [2023-08-24 06:43:38,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 274.1666666666667) internal successors, (3290), 12 states have internal predecessors, (3290), 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) [2023-08-24 06:43:38,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 598.0) internal successors, (7774), 13 states have internal predecessors, (7774), 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) [2023-08-24 06:43:38,085 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 598.0) internal successors, (7774), 13 states have internal predecessors, (7774), 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) [2023-08-24 06:43:38,085 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 201 flow. Second operand 12 states and 3290 transitions. [2023-08-24 06:43:38,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 373 flow [2023-08-24 06:43:38,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 81 transitions, 359 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:43:38,087 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 271 flow [2023-08-24 06:43:38,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, 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} [2023-08-24 06:43:38,088 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2023-08-24 06:43:38,088 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 271 flow [2023-08-24 06:43:38,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 269.46153846153845) internal successors, (3503), 13 states have internal predecessors, (3503), 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) [2023-08-24 06:43:38,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:43:38,089 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:43:38,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 06:43:38,294 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 [2023-08-24 06:43:38,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:43:38,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:43:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1722801923, now seen corresponding path program 3 times [2023-08-24 06:43:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:43:38,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900746821] [2023-08-24 06:43:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:43:38,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:43:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:43:38,319 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:43:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:43:38,334 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:43:38,335 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:43:38,335 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:43:38,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 06:43:38,335 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:43:38,335 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:43:38,336 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:43:38,336 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 06:43:38,371 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 06:43:38,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 408 transitions, 860 flow [2023-08-24 06:43:38,503 INFO L124 PetriNetUnfolderBase]: 170/949 cut-off events. [2023-08-24 06:43:38,504 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 06:43:38,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 949 events. 170/949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4834 event pairs, 6 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 689. Up to 32 conditions per place. [2023-08-24 06:43:38,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 408 transitions, 860 flow [2023-08-24 06:43:38,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 408 transitions, 860 flow [2023-08-24 06:43:38,534 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:43:38,534 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 339 places, 408 transitions, 860 flow [2023-08-24 06:43:38,535 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 339 places, 408 transitions, 860 flow [2023-08-24 06:43:38,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 408 transitions, 860 flow [2023-08-24 06:43:38,652 INFO L124 PetriNetUnfolderBase]: 170/949 cut-off events. [2023-08-24 06:43:38,652 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 06:43:38,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 949 events. 170/949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4834 event pairs, 6 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 689. Up to 32 conditions per place. [2023-08-24 06:43:38,704 INFO L119 LiptonReduction]: Number of co-enabled transitions 110952 [2023-08-24 06:43:42,126 INFO L134 LiptonReduction]: Checked pairs total: 192300 [2023-08-24 06:43:42,126 INFO L136 LiptonReduction]: Total number of compositions: 313 [2023-08-24 06:43:42,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:43:42,128 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;@1aaca4c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:43:42,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:43:42,140 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:43:42,140 INFO L124 PetriNetUnfolderBase]: 93/260 cut-off events. [2023-08-24 06:43:42,140 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 06:43:42,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:43:42,140 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:43:42,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:43:42,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:43:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1883559231, now seen corresponding path program 1 times [2023-08-24 06:43:42,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:43:42,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349255722] [2023-08-24 06:43:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:43:42,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:43:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:43:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-24 06:43:42,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:43:42,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349255722] [2023-08-24 06:43:42,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349255722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:43:42,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:43:42,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:43:42,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827283882] [2023-08-24 06:43:42,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:43:42,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:43:42,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:43:42,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:43:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:43:42,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 721 [2023-08-24 06:43:42,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 171 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 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) [2023-08-24 06:43:42,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:43:42,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 721 [2023-08-24 06:43:42,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand