/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:12:39,063 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:12:39,148 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 00:12:39,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:12:39,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:12:39,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:12:39,185 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:12:39,185 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:12:39,186 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:12:39,189 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:12:39,190 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:12:39,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:12:39,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:12:39,191 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:12:39,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:12:39,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:12:39,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:12:39,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:12:39,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:12:39,192 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:12:39,193 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:12:39,194 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:12:39,194 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:12:39,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:12:39,194 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:12:39,195 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:12:39,195 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:12:39,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:12:39,195 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:12:39,196 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:12:39,196 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:12:39,197 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:12:39,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:12:39,197 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:12:39,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:12:39,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:12:39,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:12:39,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:12:39,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:12:39,530 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:12:39,531 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:12:39,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-24 00:12:40,771 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:12:41,097 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:12:41,097 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-24 00:12:41,117 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6ffb0eff/72975ea0655344329b21144db332b40d/FLAGd5cdc081b [2023-08-24 00:12:41,132 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6ffb0eff/72975ea0655344329b21144db332b40d [2023-08-24 00:12:41,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:12:41,138 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:12:41,140 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:12:41,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:12:41,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:12:41,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ea7178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41, skipping insertion in model container [2023-08-24 00:12:41,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,200 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:12:41,595 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_79-equ_racefree.i[47038,47051] [2023-08-24 00:12:41,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:12:41,651 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:12:41,677 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:12:41,679 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:12:41,693 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_79-equ_racefree.i[47038,47051] [2023-08-24 00:12:41,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:12:41,762 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:12:41,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41 WrapperNode [2023-08-24 00:12:41,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:12:41,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:12:41,763 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:12:41,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:12:41,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,812 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 206 [2023-08-24 00:12:41,813 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:12:41,814 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:12:41,814 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:12:41,814 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:12:41,824 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,838 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,838 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,846 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,858 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,861 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:12:41,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:12:41,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:12:41,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:12:41,867 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (1/1) ... [2023-08-24 00:12:41,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:12:41,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:41,898 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 00:12:41,925 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 00:12:41,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:12:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:12:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:12:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:12:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:12:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:12:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:12:41,938 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:12:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:12:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:12:41,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:12:41,940 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 00:12:42,052 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:12:42,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:12:42,393 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:12:42,401 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:12:42,401 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-24 00:12:42,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:12:42 BoogieIcfgContainer [2023-08-24 00:12:42,403 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:12:42,405 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:12:42,405 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:12:42,407 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:12:42,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:12:41" (1/3) ... [2023-08-24 00:12:42,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70232d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:12:42, skipping insertion in model container [2023-08-24 00:12:42,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:12:41" (2/3) ... [2023-08-24 00:12:42,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70232d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:12:42, skipping insertion in model container [2023-08-24 00:12:42,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:12:42" (3/3) ... [2023-08-24 00:12:42,413 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2023-08-24 00:12:42,428 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:12:42,428 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 00:12:42,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:12:42,517 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:12:42,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 203 transitions, 414 flow [2023-08-24 00:12:42,668 INFO L124 PetriNetUnfolderBase]: 43/275 cut-off events. [2023-08-24 00:12:42,668 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:12:42,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 275 events. 43/275 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 838 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-24 00:12:42,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 203 transitions, 414 flow [2023-08-24 00:12:42,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 196 transitions, 397 flow [2023-08-24 00:12:42,685 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:12:42,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 196 transitions, 397 flow [2023-08-24 00:12:42,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 196 transitions, 397 flow [2023-08-24 00:12:42,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 196 transitions, 397 flow [2023-08-24 00:12:42,732 INFO L124 PetriNetUnfolderBase]: 41/268 cut-off events. [2023-08-24 00:12:42,733 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:42,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 268 events. 41/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 820 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-24 00:12:42,738 INFO L119 LiptonReduction]: Number of co-enabled transitions 8892 [2023-08-24 00:12:48,230 INFO L134 LiptonReduction]: Checked pairs total: 16908 [2023-08-24 00:12:48,231 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-24 00:12:48,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:12:48,248 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;@b7a1307, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:12:48,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 00:12:48,253 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:12:48,253 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-08-24 00:12:48,253 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:48,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:48,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:12:48,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:12:48,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:48,259 INFO L85 PathProgramCache]: Analyzing trace with hash 732800108, now seen corresponding path program 1 times [2023-08-24 00:12:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:48,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171932233] [2023-08-24 00:12:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:48,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:48,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:48,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171932233] [2023-08-24 00:12:48,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171932233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:48,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:12:48,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:12:48,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540544128] [2023-08-24 00:12:48,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:48,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:12:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:12:48,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:12:48,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 364 [2023-08-24 00:12:48,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 64 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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 00:12:48,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:48,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 364 [2023-08-24 00:12:48,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:48,785 INFO L124 PetriNetUnfolderBase]: 274/651 cut-off events. [2023-08-24 00:12:48,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:48,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 651 events. 274/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3523 event pairs, 0 based on Foata normal form. 119/685 useless extension candidates. Maximal degree in co-relation 1175. Up to 529 conditions per place. [2023-08-24 00:12:48,791 INFO L140 encePairwiseOnDemand]: 339/364 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-24 00:12:48,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 225 flow [2023-08-24 00:12:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:12:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:12:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-08-24 00:12:48,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-08-24 00:12:48,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-08-24 00:12:48,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-08-24 00:12:48,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:48,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-08-24 00:12:48,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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 00:12:48,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 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 00:12:48,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 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 00:12:48,822 INFO L175 Difference]: Start difference. First operand has 44 places, 64 transitions, 133 flow. Second operand 3 states and 585 transitions. [2023-08-24 00:12:48,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 225 flow [2023-08-24 00:12:48,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:12:48,827 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 97 flow [2023-08-24 00:12:48,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-24 00:12:48,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-24 00:12:48,832 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 97 flow [2023-08-24 00:12:48,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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 00:12:48,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:48,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 00:12:48,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:12:48,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:12:48,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:48,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1234902606, now seen corresponding path program 1 times [2023-08-24 00:12:48,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:48,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894586010] [2023-08-24 00:12:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:48,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:48,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:12:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:48,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:12:48,932 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:12:48,934 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-24 00:12:48,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 00:12:48,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-24 00:12:48,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 00:12:48,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:12:48,936 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 00:12:48,938 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:12:48,938 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:12:48,975 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:12:48,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 262 transitions, 542 flow [2023-08-24 00:12:49,038 INFO L124 PetriNetUnfolderBase]: 72/431 cut-off events. [2023-08-24 00:12:49,039 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:12:49,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 431 events. 72/431 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1629 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 277. Up to 12 conditions per place. [2023-08-24 00:12:49,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 262 transitions, 542 flow [2023-08-24 00:12:49,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 260 transitions, 538 flow [2023-08-24 00:12:49,048 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:12:49,048 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 260 transitions, 538 flow [2023-08-24 00:12:49,048 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 260 transitions, 538 flow [2023-08-24 00:12:49,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 260 transitions, 538 flow [2023-08-24 00:12:49,101 INFO L124 PetriNetUnfolderBase]: 71/429 cut-off events. [2023-08-24 00:12:49,101 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:12:49,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 429 events. 71/429 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1645 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-08-24 00:12:49,120 INFO L119 LiptonReduction]: Number of co-enabled transitions 25536 [2023-08-24 00:12:54,967 INFO L134 LiptonReduction]: Checked pairs total: 52691 [2023-08-24 00:12:54,967 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-08-24 00:12:54,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:12:54,978 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;@b7a1307, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:12:54,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 00:12:54,982 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:12:54,982 INFO L124 PetriNetUnfolderBase]: 7/28 cut-off events. [2023-08-24 00:12:54,982 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:12:54,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:54,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:12:54,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:54,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1234531666, now seen corresponding path program 1 times [2023-08-24 00:12:54,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:54,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049261026] [2023-08-24 00:12:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:55,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:55,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049261026] [2023-08-24 00:12:55,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049261026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:55,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:12:55,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:12:55,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908475031] [2023-08-24 00:12:55,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:55,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:12:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:55,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:12:55,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:12:55,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 467 [2023-08-24 00:12:55,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 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 00:12:55,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:55,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 467 [2023-08-24 00:12:55,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:56,114 INFO L124 PetriNetUnfolderBase]: 8666/13887 cut-off events. [2023-08-24 00:12:56,114 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-24 00:12:56,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26861 conditions, 13887 events. 8666/13887 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 96622 event pairs, 3885 based on Foata normal form. 3325/14938 useless extension candidates. Maximal degree in co-relation 2307. Up to 12844 conditions per place. [2023-08-24 00:12:56,296 INFO L140 encePairwiseOnDemand]: 433/467 looper letters, 66 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-24 00:12:56,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 320 flow [2023-08-24 00:12:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:12:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:12:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2023-08-24 00:12:56,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324768022840828 [2023-08-24 00:12:56,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2023-08-24 00:12:56,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2023-08-24 00:12:56,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:56,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2023-08-24 00:12:56,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 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 00:12:56,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 467.0) internal successors, (1868), 4 states have internal predecessors, (1868), 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 00:12:56,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 467.0) internal successors, (1868), 4 states have internal predecessors, (1868), 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 00:12:56,309 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 214 flow. Second operand 3 states and 746 transitions. [2023-08-24 00:12:56,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 320 flow [2023-08-24 00:12:56,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:12:56,313 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 164 flow [2023-08-24 00:12:56,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=467, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-08-24 00:12:56,314 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-24 00:12:56,314 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 164 flow [2023-08-24 00:12:56,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 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 00:12:56,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:56,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:56,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 00:12:56,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:56,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:56,315 INFO L85 PathProgramCache]: Analyzing trace with hash 534013653, now seen corresponding path program 1 times [2023-08-24 00:12:56,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:56,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536584703] [2023-08-24 00:12:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:56,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:56,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:56,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536584703] [2023-08-24 00:12:56,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536584703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:12:56,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:12:56,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:12:56,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487827730] [2023-08-24 00:12:56,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:12:56,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 00:12:56,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 00:12:56,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 00:12:56,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 467 [2023-08-24 00:12:56,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 170.5) internal successors, (682), 4 states have internal predecessors, (682), 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 00:12:56,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:56,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 467 [2023-08-24 00:12:56,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:57,870 INFO L124 PetriNetUnfolderBase]: 10858/17603 cut-off events. [2023-08-24 00:12:57,870 INFO L125 PetriNetUnfolderBase]: For 754/754 co-relation queries the response was YES. [2023-08-24 00:12:57,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35008 conditions, 17603 events. 10858/17603 cut-off events. For 754/754 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 128254 event pairs, 3224 based on Foata normal form. 0/15413 useless extension candidates. Maximal degree in co-relation 34900. Up to 10872 conditions per place. [2023-08-24 00:12:57,942 INFO L140 encePairwiseOnDemand]: 454/467 looper letters, 115 selfloop transitions, 13 changer transitions 7/150 dead transitions. [2023-08-24 00:12:57,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 150 transitions, 626 flow [2023-08-24 00:12:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 00:12:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 00:12:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 813 transitions. [2023-08-24 00:12:57,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4352248394004283 [2023-08-24 00:12:57,945 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 813 transitions. [2023-08-24 00:12:57,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 813 transitions. [2023-08-24 00:12:57,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:57,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 813 transitions. [2023-08-24 00:12:57,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 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 00:12:57,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 467.0) internal successors, (2335), 5 states have internal predecessors, (2335), 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 00:12:57,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 467.0) internal successors, (2335), 5 states have internal predecessors, (2335), 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 00:12:57,952 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 164 flow. Second operand 4 states and 813 transitions. [2023-08-24 00:12:57,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 150 transitions, 626 flow [2023-08-24 00:12:57,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 150 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:12:57,960 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 268 flow [2023-08-24 00:12:57,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=467, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2023-08-24 00:12:57,962 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-24 00:12:57,962 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 268 flow [2023-08-24 00:12:57,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.5) internal successors, (682), 4 states have internal predecessors, (682), 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 00:12:57,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:57,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:12:57,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 00:12:57,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:57,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:57,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1075537034, now seen corresponding path program 1 times [2023-08-24 00:12:57,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:57,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534155133] [2023-08-24 00:12:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:57,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:58,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:12:58,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534155133] [2023-08-24 00:12:58,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534155133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:12:58,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462035839] [2023-08-24 00:12:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:58,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:58,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:12:58,037 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 00:12:58,066 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 00:12:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:12:58,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:12:58,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:12:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:58,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:12:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:12:58,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462035839] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:12:58,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:12:58,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 00:12:58,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33455299] [2023-08-24 00:12:58,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:12:58,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:12:58,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:12:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:12:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 00:12:58,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 467 [2023-08-24 00:12:58,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 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 00:12:58,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:12:58,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 467 [2023-08-24 00:12:58,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:12:58,533 INFO L124 PetriNetUnfolderBase]: 1325/2516 cut-off events. [2023-08-24 00:12:58,533 INFO L125 PetriNetUnfolderBase]: For 1094/1094 co-relation queries the response was YES. [2023-08-24 00:12:58,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6395 conditions, 2516 events. 1325/2516 cut-off events. For 1094/1094 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16072 event pairs, 34 based on Foata normal form. 296/2716 useless extension candidates. Maximal degree in co-relation 2424. Up to 1598 conditions per place. [2023-08-24 00:12:58,549 INFO L140 encePairwiseOnDemand]: 464/467 looper letters, 89 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2023-08-24 00:12:58,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 101 transitions, 514 flow [2023-08-24 00:12:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:12:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:12:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1141 transitions. [2023-08-24 00:12:58,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48865096359743043 [2023-08-24 00:12:58,553 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1141 transitions. [2023-08-24 00:12:58,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1141 transitions. [2023-08-24 00:12:58,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:12:58,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1141 transitions. [2023-08-24 00:12:58,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.2) internal successors, (1141), 5 states have internal predecessors, (1141), 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 00:12:58,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 467.0) internal successors, (2802), 6 states have internal predecessors, (2802), 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 00:12:58,653 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 467.0) internal successors, (2802), 6 states have internal predecessors, (2802), 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 00:12:58,653 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 268 flow. Second operand 5 states and 1141 transitions. [2023-08-24 00:12:58,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 101 transitions, 514 flow [2023-08-24 00:12:58,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 101 transitions, 512 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-24 00:12:58,657 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 178 flow [2023-08-24 00:12:58,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=467, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=5, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-08-24 00:12:58,658 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-24 00:12:58,658 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 178 flow [2023-08-24 00:12:58,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 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 00:12:58,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:12:58,660 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 00:12:58,672 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 00:12:58,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:12:58,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:12:58,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:12:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1945039356, now seen corresponding path program 1 times [2023-08-24 00:12:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:12:58,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022852182] [2023-08-24 00:12:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:12:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:12:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:58,885 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:12:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:12:58,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:12:58,903 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:12:58,903 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-24 00:12:58,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 00:12:58,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-24 00:12:58,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 00:12:58,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 00:12:58,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:12:58,904 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 00:12:58,905 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:12:58,905 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:12:58,933 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:12:58,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 321 transitions, 672 flow [2023-08-24 00:12:59,006 INFO L124 PetriNetUnfolderBase]: 106/620 cut-off events. [2023-08-24 00:12:59,007 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:12:59,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 620 events. 106/620 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2599 event pairs, 1 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 439. Up to 16 conditions per place. [2023-08-24 00:12:59,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 321 transitions, 672 flow [2023-08-24 00:12:59,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 319 transitions, 668 flow [2023-08-24 00:12:59,019 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:12:59,019 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 319 transitions, 668 flow [2023-08-24 00:12:59,020 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 319 transitions, 668 flow [2023-08-24 00:12:59,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 319 transitions, 668 flow [2023-08-24 00:12:59,086 INFO L124 PetriNetUnfolderBase]: 105/618 cut-off events. [2023-08-24 00:12:59,087 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:12:59,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 618 events. 105/618 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2610 event pairs, 1 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 437. Up to 16 conditions per place. [2023-08-24 00:12:59,118 INFO L119 LiptonReduction]: Number of co-enabled transitions 48564 [2023-08-24 00:13:06,789 INFO L134 LiptonReduction]: Checked pairs total: 112997 [2023-08-24 00:13:06,789 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-24 00:13:06,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:13:06,791 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;@b7a1307, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:13:06,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 00:13:06,794 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:13:06,794 INFO L124 PetriNetUnfolderBase]: 7/28 cut-off events. [2023-08-24 00:13:06,794 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:13:06,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:13:06,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:13:06,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:13:06,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:13:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1834396132, now seen corresponding path program 1 times [2023-08-24 00:13:06,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:13:06,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422680682] [2023-08-24 00:13:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:06,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:13:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:13:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:13:06,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:13:06,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422680682] [2023-08-24 00:13:06,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422680682] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:13:06,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:13:06,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:13:06,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022722179] [2023-08-24 00:13:06,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:13:06,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:13:06,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:13:06,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:13:06,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:13:06,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 570 [2023-08-24 00:13:06,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 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 00:13:06,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:13:06,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 570 [2023-08-24 00:13:06,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:13:21,971 INFO L124 PetriNetUnfolderBase]: 187412/264993 cut-off events. [2023-08-24 00:13:21,972 INFO L125 PetriNetUnfolderBase]: For 3111/3111 co-relation queries the response was YES. [2023-08-24 00:13:22,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511940 conditions, 264993 events. 187412/264993 cut-off events. For 3111/3111 co-relation queries the response was YES. Maximal size of possible extension queue 7493. Compared 2103110 event pairs, 115799 based on Foata normal form. 66267/288155 useless extension candidates. Maximal degree in co-relation 25663. Up to 244876 conditions per place. [2023-08-24 00:13:23,673 INFO L140 encePairwiseOnDemand]: 526/570 looper letters, 82 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-24 00:13:23,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 406 flow [2023-08-24 00:13:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:13:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:13:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 907 transitions. [2023-08-24 00:13:23,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304093567251462 [2023-08-24 00:13:23,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 907 transitions. [2023-08-24 00:13:23,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 907 transitions. [2023-08-24 00:13:23,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:13:23,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 907 transitions. [2023-08-24 00:13:23,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 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 00:13:23,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 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 00:13:23,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 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 00:13:23,684 INFO L175 Difference]: Start difference. First operand has 87 places, 128 transitions, 286 flow. Second operand 3 states and 907 transitions. [2023-08-24 00:13:23,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 406 flow [2023-08-24 00:13:23,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 406 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:13:23,691 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 216 flow [2023-08-24 00:13:23,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-08-24 00:13:23,692 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-24 00:13:23,692 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 216 flow [2023-08-24 00:13:23,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 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 00:13:23,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:13:23,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:13:23,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 00:13:23,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:13:23,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:13:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1210946295, now seen corresponding path program 1 times [2023-08-24 00:13:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:13:23,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193112272] [2023-08-24 00:13:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:13:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:13:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:13:23,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:13:23,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193112272] [2023-08-24 00:13:23,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193112272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:13:23,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:13:23,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:13:23,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175335065] [2023-08-24 00:13:23,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:13:23,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 00:13:23,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:13:23,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 00:13:23,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 00:13:23,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 570 [2023-08-24 00:13:23,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 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 00:13:23,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:13:23,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 570 [2023-08-24 00:13:23,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:13:44,785 INFO L124 PetriNetUnfolderBase]: 275807/390049 cut-off events. [2023-08-24 00:13:44,786 INFO L125 PetriNetUnfolderBase]: For 15102/15102 co-relation queries the response was YES. [2023-08-24 00:13:45,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775188 conditions, 390049 events. 275807/390049 cut-off events. For 15102/15102 co-relation queries the response was YES. Maximal size of possible extension queue 12096. Compared 3226243 event pairs, 65903 based on Foata normal form. 0/343631 useless extension candidates. Maximal degree in co-relation 775074. Up to 237222 conditions per place. [2023-08-24 00:13:46,560 INFO L140 encePairwiseOnDemand]: 553/570 looper letters, 160 selfloop transitions, 18 changer transitions 0/197 dead transitions. [2023-08-24 00:13:46,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 197 transitions, 838 flow [2023-08-24 00:13:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 00:13:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 00:13:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1010 transitions. [2023-08-24 00:13:46,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44298245614035087 [2023-08-24 00:13:46,564 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1010 transitions. [2023-08-24 00:13:46,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1010 transitions. [2023-08-24 00:13:46,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:13:46,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1010 transitions. [2023-08-24 00:13:46,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 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 00:13:46,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 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 00:13:46,571 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 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 00:13:46,571 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 216 flow. Second operand 4 states and 1010 transitions. [2023-08-24 00:13:46,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 197 transitions, 838 flow [2023-08-24 00:13:46,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 197 transitions, 835 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:13:46,583 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 358 flow [2023-08-24 00:13:46,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2023-08-24 00:13:46,583 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 8 predicate places. [2023-08-24 00:13:46,584 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 358 flow [2023-08-24 00:13:46,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 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 00:13:46,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:13:46,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:13:46,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 00:13:46,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:13:46,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:13:46,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1622274026, now seen corresponding path program 1 times [2023-08-24 00:13:46,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:13:46,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875653257] [2023-08-24 00:13:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:13:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:13:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:13:46,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:13:46,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875653257] [2023-08-24 00:13:46,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875653257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:13:46,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756118546] [2023-08-24 00:13:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:46,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:13:46,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:13:46,637 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 00:13:46,644 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 00:13:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:13:46,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:13:46,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:13:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:13:47,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:13:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:13:47,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756118546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:13:47,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:13:47,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 00:13:47,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477056028] [2023-08-24 00:13:47,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:13:47,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:13:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:13:47,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:13:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 00:13:47,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 570 [2023-08-24 00:13:47,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 358 flow. Second operand has 6 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 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 00:13:47,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:13:47,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 570 [2023-08-24 00:13:47,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:13:50,432 INFO L124 PetriNetUnfolderBase]: 34538/53421 cut-off events. [2023-08-24 00:13:50,433 INFO L125 PetriNetUnfolderBase]: For 30988/30988 co-relation queries the response was YES. [2023-08-24 00:13:50,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137698 conditions, 53421 events. 34538/53421 cut-off events. For 30988/30988 co-relation queries the response was YES. Maximal size of possible extension queue 2175. Compared 422766 event pairs, 1119 based on Foata normal form. 4795/55765 useless extension candidates. Maximal degree in co-relation 39534. Up to 33949 conditions per place. [2023-08-24 00:13:50,674 INFO L140 encePairwiseOnDemand]: 567/570 looper letters, 165 selfloop transitions, 4 changer transitions 0/183 dead transitions. [2023-08-24 00:13:50,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 183 transitions, 961 flow [2023-08-24 00:13:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:13:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:13:50,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1682 transitions. [2023-08-24 00:13:50,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49181286549707603 [2023-08-24 00:13:50,679 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1682 transitions. [2023-08-24 00:13:50,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1682 transitions. [2023-08-24 00:13:50,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:13:50,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1682 transitions. [2023-08-24 00:13:50,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 280.3333333333333) internal successors, (1682), 6 states have internal predecessors, (1682), 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 00:13:50,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 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 00:13:50,688 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 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 00:13:50,688 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 358 flow. Second operand 6 states and 1682 transitions. [2023-08-24 00:13:50,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 183 transitions, 961 flow [2023-08-24 00:13:50,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 183 transitions, 955 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-24 00:13:50,722 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 273 flow [2023-08-24 00:13:50,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2023-08-24 00:13:50,722 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-24 00:13:50,723 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 273 flow [2023-08-24 00:13:50,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 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 00:13:50,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:13:50,723 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 00:13:50,731 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 00:13:50,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-24 00:13:50,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:13:50,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:13:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1513410756, now seen corresponding path program 1 times [2023-08-24 00:13:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:13:50,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291008513] [2023-08-24 00:13:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:50,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:13:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:13:50,944 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:13:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:13:50,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:13:50,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:13:50,977 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-24 00:13:50,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-24 00:13:50,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-24 00:13:50,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-24 00:13:50,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-24 00:13:50,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-24 00:13:50,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 00:13:50,978 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 00:13:50,979 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:13:50,979 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:13:51,010 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:13:51,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 380 transitions, 804 flow [2023-08-24 00:13:51,129 INFO L124 PetriNetUnfolderBase]: 152/877 cut-off events. [2023-08-24 00:13:51,129 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:13:51,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 877 events. 152/877 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3988 event pairs, 6 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 640. Up to 32 conditions per place. [2023-08-24 00:13:51,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 380 transitions, 804 flow [2023-08-24 00:13:51,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 378 transitions, 800 flow [2023-08-24 00:13:51,150 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:13:51,151 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 378 transitions, 800 flow [2023-08-24 00:13:51,151 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 378 transitions, 800 flow [2023-08-24 00:13:51,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 378 transitions, 800 flow [2023-08-24 00:13:51,238 INFO L124 PetriNetUnfolderBase]: 151/875 cut-off events. [2023-08-24 00:13:51,239 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:13:51,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 875 events. 151/875 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3981 event pairs, 6 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 638. Up to 32 conditions per place. [2023-08-24 00:13:51,286 INFO L119 LiptonReduction]: Number of co-enabled transitions 78432 [2023-08-24 00:13:59,038 INFO L134 LiptonReduction]: Checked pairs total: 187060 [2023-08-24 00:13:59,039 INFO L136 LiptonReduction]: Total number of compositions: 296 [2023-08-24 00:13:59,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:13:59,041 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;@b7a1307, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:13:59,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-24 00:13:59,043 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:13:59,043 INFO L124 PetriNetUnfolderBase]: 7/28 cut-off events. [2023-08-24 00:13:59,043 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:13:59,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:13:59,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:13:59,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-24 00:13:59,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:13:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1759437994, now seen corresponding path program 1 times [2023-08-24 00:13:59,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:13:59,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311745387] [2023-08-24 00:13:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:13:59,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:13:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:13:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:13:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:13:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311745387] [2023-08-24 00:13:59,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311745387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:13:59,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:13:59,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:13:59,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719015691] [2023-08-24 00:13:59,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:13:59,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:13:59,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:13:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:13:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:13:59,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 676 [2023-08-24 00:13:59,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 162 transitions, 368 flow. Second operand has 3 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 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 00:13:59,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:13:59,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 676 [2023-08-24 00:13:59,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand