/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/pthread/stack-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:29:15,686 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:29:15,764 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 [2023-08-23 22:29:15,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:29:15,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:29:15,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:29:15,788 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:29:15,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:29:15,789 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:29:15,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:29:15,793 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:29:15,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:29:15,793 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:29:15,794 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:29:15,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:29:15,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:29:15,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:29:15,795 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:29:15,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:29:15,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:29:15,795 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:29:15,796 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:29:15,797 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:29:15,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:29:15,797 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:29:15,798 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:29:15,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:29:15,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:29:15,798 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:29:15,798 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:29:15,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:29:15,799 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:29:15,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:29:15,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:29:15,800 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:29:15,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:29:16,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:29:16,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:29:16,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:29:16,089 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:29:16,090 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:29:16,091 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2023-08-23 22:29:17,213 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:29:17,542 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:29:17,542 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2023-08-23 22:29:17,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d2640113/c97c22f5607e4a5aabf61d5ef8af4955/FLAG20520f4af [2023-08-23 22:29:17,572 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d2640113/c97c22f5607e4a5aabf61d5ef8af4955 [2023-08-23 22:29:17,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:29:17,577 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:29:17,581 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:29:17,581 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:29:17,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:29:17,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:29:17" (1/1) ... [2023-08-23 22:29:17,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17abab41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:17, skipping insertion in model container [2023-08-23 22:29:17,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:29:17" (1/1) ... [2023-08-23 22:29:17,641 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:29:18,034 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2023-08-23 22:29:18,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:29:18,068 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:29:18,097 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-23 22:29:18,099 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-23 22:29:18,105 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-23 22:29:18,118 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2023-08-23 22:29:18,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:29:18,206 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:29:18,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18 WrapperNode [2023-08-23 22:29:18,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:29:18,209 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:29:18,209 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:29:18,209 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:29:18,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,277 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 153 [2023-08-23 22:29:18,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:29:18,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:29:18,278 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:29:18,278 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:29:18,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,298 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,313 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,314 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,315 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,318 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:29:18,318 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:29:18,318 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:29:18,318 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:29:18,319 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (1/1) ... [2023-08-23 22:29:18,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:29:18,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:29:18,353 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) [2023-08-23 22:29:18,361 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 [2023-08-23 22:29:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-23 22:29:18,380 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-23 22:29:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-23 22:29:18,381 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-23 22:29:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:29:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:29:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 22:29:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:29:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-23 22:29:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:29:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:29:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:29:18,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:29:18,383 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:29:18,491 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:29:18,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:29:18,706 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:29:18,714 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:29:18,714 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-23 22:29:18,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:29:18 BoogieIcfgContainer [2023-08-23 22:29:18,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:29:18,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:29:18,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:29:18,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:29:18,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:29:17" (1/3) ... [2023-08-23 22:29:18,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3a1ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:29:18, skipping insertion in model container [2023-08-23 22:29:18,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:29:18" (2/3) ... [2023-08-23 22:29:18,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3a1ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:29:18, skipping insertion in model container [2023-08-23 22:29:18,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:29:18" (3/3) ... [2023-08-23 22:29:18,722 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2023-08-23 22:29:18,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:29:18,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-23 22:29:18,741 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:29:18,851 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-23 22:29:18,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 155 transitions, 326 flow [2023-08-23 22:29:18,980 INFO L124 PetriNetUnfolderBase]: 10/153 cut-off events. [2023-08-23 22:29:18,980 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:29:18,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 10/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 348 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-08-23 22:29:18,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 155 transitions, 326 flow [2023-08-23 22:29:18,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 144 transitions, 297 flow [2023-08-23 22:29:18,997 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:29:19,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 144 transitions, 297 flow [2023-08-23 22:29:19,009 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 144 transitions, 297 flow [2023-08-23 22:29:19,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 144 transitions, 297 flow [2023-08-23 22:29:19,053 INFO L124 PetriNetUnfolderBase]: 10/144 cut-off events. [2023-08-23 22:29:19,053 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:29:19,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 144 events. 10/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 309 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-08-23 22:29:19,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 6492 [2023-08-23 22:29:22,676 INFO L134 LiptonReduction]: Checked pairs total: 8991 [2023-08-23 22:29:22,676 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-23 22:29:22,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:29:22,693 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;@4d19d135, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:29:22,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-23 22:29:22,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:29:22,697 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-23 22:29:22,697 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:29:22,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:22,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:29:22,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:22,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1268975004, now seen corresponding path program 1 times [2023-08-23 22:29:22,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:22,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602109922] [2023-08-23 22:29:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:22,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:22,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:22,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602109922] [2023-08-23 22:29:22,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602109922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:29:22,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:29:22,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:29:22,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59760058] [2023-08-23 22:29:22,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:29:22,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:29:22,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:22,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:29:22,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:29:22,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 290 [2023-08-23 22:29:22,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2023-08-23 22:29:22,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:22,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 290 [2023-08-23 22:29:22,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:23,116 INFO L124 PetriNetUnfolderBase]: 661/1082 cut-off events. [2023-08-23 22:29:23,116 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-23 22:29:23,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 1082 events. 661/1082 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4006 event pairs, 283 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 2034. Up to 687 conditions per place. [2023-08-23 22:29:23,124 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 50 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-23 22:29:23,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 227 flow [2023-08-23 22:29:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:29:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:29:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-23 22:29:23,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149425287356322 [2023-08-23 22:29:23,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-23 22:29:23,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-23 22:29:23,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:23,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-23 22:29:23,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:29:23,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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) [2023-08-23 22:29:23,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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) [2023-08-23 22:29:23,151 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 448 transitions. [2023-08-23 22:29:23,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 227 flow [2023-08-23 22:29:23,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 53 transitions, 219 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-23 22:29:23,155 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-08-23 22:29:23,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-08-23 22:29:23,159 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-23 22:29:23,160 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-08-23 22:29:23,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2023-08-23 22:29:23,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:23,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:23,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:29:23,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:23,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash -575844582, now seen corresponding path program 1 times [2023-08-23 22:29:23,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532271637] [2023-08-23 22:29:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:23,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:23,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532271637] [2023-08-23 22:29:23,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532271637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:29:23,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:29:23,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:29:23,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646283982] [2023-08-23 22:29:23,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:29:23,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:29:23,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:23,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:29:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:29:23,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 290 [2023-08-23 22:29:23,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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) [2023-08-23 22:29:23,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:23,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 290 [2023-08-23 22:29:23,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:23,429 INFO L124 PetriNetUnfolderBase]: 625/1064 cut-off events. [2023-08-23 22:29:23,429 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-08-23 22:29:23,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2244 conditions, 1064 events. 625/1064 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4657 event pairs, 314 based on Foata normal form. 0/906 useless extension candidates. Maximal degree in co-relation 2008. Up to 926 conditions per place. [2023-08-23 22:29:23,435 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-23 22:29:23,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-08-23 22:29:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:29:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:29:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-23 22:29:23,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5310344827586206 [2023-08-23 22:29:23,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-23 22:29:23,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-23 22:29:23,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:23,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-23 22:29:23,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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) [2023-08-23 22:29:23,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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) [2023-08-23 22:29:23,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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) [2023-08-23 22:29:23,447 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 462 transitions. [2023-08-23 22:29:23,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-08-23 22:29:23,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:29:23,450 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-08-23 22:29:23,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-08-23 22:29:23,452 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-23 22:29:23,453 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-08-23 22:29:23,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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) [2023-08-23 22:29:23,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:23,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:23,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:29:23,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:23,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash -884871179, now seen corresponding path program 1 times [2023-08-23 22:29:23,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:23,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387070470] [2023-08-23 22:29:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:23,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:23,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387070470] [2023-08-23 22:29:23,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387070470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:29:23,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771988331] [2023-08-23 22:29:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:23,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:29:23,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:29:23,613 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) [2023-08-23 22:29:23,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-23 22:29:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:23,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-23 22:29:23,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:29:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:23,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:29:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:23,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771988331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:29:23,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:29:23,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-23 22:29:23,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036143910] [2023-08-23 22:29:23,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:29:23,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-23 22:29:23,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-23 22:29:23,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-23 22:29:23,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 290 [2023-08-23 22:29:23,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 132.4) internal successors, (1324), 10 states have internal predecessors, (1324), 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) [2023-08-23 22:29:23,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:23,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 290 [2023-08-23 22:29:23,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:24,285 INFO L124 PetriNetUnfolderBase]: 1619/2654 cut-off events. [2023-08-23 22:29:24,285 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-08-23 22:29:24,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6125 conditions, 2654 events. 1619/2654 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12096 event pairs, 246 based on Foata normal form. 82/2392 useless extension candidates. Maximal degree in co-relation 5686. Up to 795 conditions per place. [2023-08-23 22:29:24,300 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2023-08-23 22:29:24,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2023-08-23 22:29:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-23 22:29:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-23 22:29:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1735 transitions. [2023-08-23 22:29:24,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4985632183908046 [2023-08-23 22:29:24,305 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1735 transitions. [2023-08-23 22:29:24,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1735 transitions. [2023-08-23 22:29:24,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:24,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1735 transitions. [2023-08-23 22:29:24,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 144.58333333333334) internal successors, (1735), 12 states have internal predecessors, (1735), 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) [2023-08-23 22:29:24,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:29:24,317 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:29:24,317 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1735 transitions. [2023-08-23 22:29:24,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2023-08-23 22:29:24,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 184 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:29:24,327 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-08-23 22:29:24,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-08-23 22:29:24,329 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-08-23 22:29:24,329 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-08-23 22:29:24,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.4) internal successors, (1324), 10 states have internal predecessors, (1324), 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) [2023-08-23 22:29:24,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:24,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:24,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-23 22:29:24,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:29:24,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:24,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2024911666, now seen corresponding path program 1 times [2023-08-23 22:29:24,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:24,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104905290] [2023-08-23 22:29:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:24,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:24,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:24,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104905290] [2023-08-23 22:29:24,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104905290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:29:24,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:29:24,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:29:24,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267311382] [2023-08-23 22:29:24,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:29:24,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:29:24,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:29:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:29:24,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 290 [2023-08-23 22:29:24,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2023-08-23 22:29:24,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:24,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 290 [2023-08-23 22:29:24,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:24,782 INFO L124 PetriNetUnfolderBase]: 509/974 cut-off events. [2023-08-23 22:29:24,782 INFO L125 PetriNetUnfolderBase]: For 586/586 co-relation queries the response was YES. [2023-08-23 22:29:24,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 974 events. 509/974 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4145 event pairs, 98 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 2336. Up to 681 conditions per place. [2023-08-23 22:29:24,786 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 45 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-08-23 22:29:24,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 348 flow [2023-08-23 22:29:24,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:29:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:29:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-23 22:29:24,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057471264367817 [2023-08-23 22:29:24,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-23 22:29:24,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-23 22:29:24,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:24,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-23 22:29:24,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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) [2023-08-23 22:29:24,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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) [2023-08-23 22:29:24,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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) [2023-08-23 22:29:24,793 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 440 transitions. [2023-08-23 22:29:24,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 348 flow [2023-08-23 22:29:24,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 327 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-23 22:29:24,800 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-08-23 22:29:24,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-23 22:29:24,801 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-08-23 22:29:24,801 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-08-23 22:29:24,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2023-08-23 22:29:24,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:24,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:24,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:29:24,802 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:24,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2104323153, now seen corresponding path program 1 times [2023-08-23 22:29:24,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:24,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673663878] [2023-08-23 22:29:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:24,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:24,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:24,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673663878] [2023-08-23 22:29:24,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673663878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:29:24,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:29:24,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:29:24,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818342516] [2023-08-23 22:29:24,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:29:24,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:29:24,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:29:24,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:29:24,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 290 [2023-08-23 22:29:24,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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) [2023-08-23 22:29:24,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:24,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 290 [2023-08-23 22:29:24,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:24,994 INFO L124 PetriNetUnfolderBase]: 624/1145 cut-off events. [2023-08-23 22:29:24,994 INFO L125 PetriNetUnfolderBase]: For 351/351 co-relation queries the response was YES. [2023-08-23 22:29:24,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2962 conditions, 1145 events. 624/1145 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4697 event pairs, 391 based on Foata normal form. 24/1169 useless extension candidates. Maximal degree in co-relation 2382. Up to 849 conditions per place. [2023-08-23 22:29:25,000 INFO L140 encePairwiseOnDemand]: 284/290 looper letters, 56 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-23 22:29:25,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 383 flow [2023-08-23 22:29:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:29:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:29:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-08-23 22:29:25,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103448275862069 [2023-08-23 22:29:25,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-08-23 22:29:25,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-08-23 22:29:25,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:25,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-08-23 22:29:25,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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) [2023-08-23 22:29:25,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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) [2023-08-23 22:29:25,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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) [2023-08-23 22:29:25,005 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 444 transitions. [2023-08-23 22:29:25,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 383 flow [2023-08-23 22:29:25,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:29:25,009 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-08-23 22:29:25,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-08-23 22:29:25,011 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-08-23 22:29:25,011 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-08-23 22:29:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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) [2023-08-23 22:29:25,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:25,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:25,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:29:25,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:25,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1299614568, now seen corresponding path program 1 times [2023-08-23 22:29:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859903054] [2023-08-23 22:29:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:25,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:25,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859903054] [2023-08-23 22:29:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859903054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:29:25,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:29:25,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 22:29:25,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225550073] [2023-08-23 22:29:25,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:29:25,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 22:29:25,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:25,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 22:29:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-23 22:29:25,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 290 [2023-08-23 22:29:25,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 15 states, 15 states have (on average 91.4) internal successors, (1371), 15 states have internal predecessors, (1371), 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) [2023-08-23 22:29:25,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:25,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 290 [2023-08-23 22:29:25,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:27,309 INFO L124 PetriNetUnfolderBase]: 930/1729 cut-off events. [2023-08-23 22:29:27,309 INFO L125 PetriNetUnfolderBase]: For 1197/1197 co-relation queries the response was YES. [2023-08-23 22:29:27,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4454 conditions, 1729 events. 930/1729 cut-off events. For 1197/1197 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7889 event pairs, 174 based on Foata normal form. 32/1747 useless extension candidates. Maximal degree in co-relation 2915. Up to 973 conditions per place. [2023-08-23 22:29:27,317 INFO L140 encePairwiseOnDemand]: 272/290 looper letters, 111 selfloop transitions, 38 changer transitions 30/179 dead transitions. [2023-08-23 22:29:27,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 179 transitions, 984 flow [2023-08-23 22:29:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-23 22:29:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-23 22:29:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2326 transitions. [2023-08-23 22:29:27,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3341954022988506 [2023-08-23 22:29:27,325 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2326 transitions. [2023-08-23 22:29:27,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2326 transitions. [2023-08-23 22:29:27,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:27,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2326 transitions. [2023-08-23 22:29:27,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.91666666666667) internal successors, (2326), 24 states have internal predecessors, (2326), 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) [2023-08-23 22:29:27,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 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) [2023-08-23 22:29:27,340 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 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) [2023-08-23 22:29:27,340 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 24 states and 2326 transitions. [2023-08-23 22:29:27,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 179 transitions, 984 flow [2023-08-23 22:29:27,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 954 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-23 22:29:27,347 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 542 flow [2023-08-23 22:29:27,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=542, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-23 22:29:27,348 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2023-08-23 22:29:27,348 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 542 flow [2023-08-23 22:29:27,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.4) internal successors, (1371), 15 states have internal predecessors, (1371), 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) [2023-08-23 22:29:27,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:27,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:27,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:29:27,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:27,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1750382990, now seen corresponding path program 2 times [2023-08-23 22:29:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025369304] [2023-08-23 22:29:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:28,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:28,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025369304] [2023-08-23 22:29:28,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025369304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:29:28,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:29:28,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-23 22:29:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643757736] [2023-08-23 22:29:28,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:29:28,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-23 22:29:28,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-23 22:29:28,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-08-23 22:29:28,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-23 22:29:28,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 542 flow. Second operand has 16 states, 16 states have (on average 87.3125) internal successors, (1397), 16 states have internal predecessors, (1397), 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) [2023-08-23 22:29:28,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:28,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-23 22:29:28,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:29,330 INFO L124 PetriNetUnfolderBase]: 1208/2259 cut-off events. [2023-08-23 22:29:29,330 INFO L125 PetriNetUnfolderBase]: For 2489/2489 co-relation queries the response was YES. [2023-08-23 22:29:29,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6977 conditions, 2259 events. 1208/2259 cut-off events. For 2489/2489 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 10806 event pairs, 374 based on Foata normal form. 16/2261 useless extension candidates. Maximal degree in co-relation 5574. Up to 1405 conditions per place. [2023-08-23 22:29:29,343 INFO L140 encePairwiseOnDemand]: 272/290 looper letters, 117 selfloop transitions, 32 changer transitions 23/172 dead transitions. [2023-08-23 22:29:29,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 172 transitions, 1221 flow [2023-08-23 22:29:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-23 22:29:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-23 22:29:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1329 transitions. [2023-08-23 22:29:29,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32733990147783254 [2023-08-23 22:29:29,349 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1329 transitions. [2023-08-23 22:29:29,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1329 transitions. [2023-08-23 22:29:29,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:29,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1329 transitions. [2023-08-23 22:29:29,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 94.92857142857143) internal successors, (1329), 14 states have internal predecessors, (1329), 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) [2023-08-23 22:29:29,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 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) [2023-08-23 22:29:29,359 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 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) [2023-08-23 22:29:29,359 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 542 flow. Second operand 14 states and 1329 transitions. [2023-08-23 22:29:29,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 172 transitions, 1221 flow [2023-08-23 22:29:29,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1209 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-23 22:29:29,371 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 756 flow [2023-08-23 22:29:29,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=756, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2023-08-23 22:29:29,372 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 74 predicate places. [2023-08-23 22:29:29,372 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 756 flow [2023-08-23 22:29:29,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.3125) internal successors, (1397), 16 states have internal predecessors, (1397), 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) [2023-08-23 22:29:29,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:29,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:29,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 22:29:29,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:29,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash 954194670, now seen corresponding path program 3 times [2023-08-23 22:29:29,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:29,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026168111] [2023-08-23 22:29:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:29,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:30,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:30,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026168111] [2023-08-23 22:29:30,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026168111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:29:30,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:29:30,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-23 22:29:30,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774460883] [2023-08-23 22:29:30,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:29:30,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-23 22:29:30,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:30,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-23 22:29:30,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-23 22:29:30,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-23 22:29:30,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 756 flow. Second operand has 16 states, 16 states have (on average 87.3125) internal successors, (1397), 16 states have internal predecessors, (1397), 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) [2023-08-23 22:29:30,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:30,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-23 22:29:30,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:31,369 INFO L124 PetriNetUnfolderBase]: 1356/2543 cut-off events. [2023-08-23 22:29:31,369 INFO L125 PetriNetUnfolderBase]: For 3554/3554 co-relation queries the response was YES. [2023-08-23 22:29:31,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8329 conditions, 2543 events. 1356/2543 cut-off events. For 3554/3554 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12525 event pairs, 371 based on Foata normal form. 16/2545 useless extension candidates. Maximal degree in co-relation 6506. Up to 1368 conditions per place. [2023-08-23 22:29:31,387 INFO L140 encePairwiseOnDemand]: 273/290 looper letters, 117 selfloop transitions, 40 changer transitions 24/181 dead transitions. [2023-08-23 22:29:31,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 181 transitions, 1431 flow [2023-08-23 22:29:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-23 22:29:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-23 22:29:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1329 transitions. [2023-08-23 22:29:31,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32733990147783254 [2023-08-23 22:29:31,392 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1329 transitions. [2023-08-23 22:29:31,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1329 transitions. [2023-08-23 22:29:31,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:31,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1329 transitions. [2023-08-23 22:29:31,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 94.92857142857143) internal successors, (1329), 14 states have internal predecessors, (1329), 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) [2023-08-23 22:29:31,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 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) [2023-08-23 22:29:31,402 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 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) [2023-08-23 22:29:31,402 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 756 flow. Second operand 14 states and 1329 transitions. [2023-08-23 22:29:31,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 181 transitions, 1431 flow [2023-08-23 22:29:31,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 181 transitions, 1403 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-23 22:29:31,427 INFO L231 Difference]: Finished difference. Result has 122 places, 108 transitions, 951 flow [2023-08-23 22:29:31,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=951, PETRI_PLACES=122, PETRI_TRANSITIONS=108} [2023-08-23 22:29:31,429 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 88 predicate places. [2023-08-23 22:29:31,429 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 108 transitions, 951 flow [2023-08-23 22:29:31,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.3125) internal successors, (1397), 16 states have internal predecessors, (1397), 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) [2023-08-23 22:29:31,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:31,429 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 22:29:31,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 22:29:31,430 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:31,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1380599275, now seen corresponding path program 2 times [2023-08-23 22:29:31,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:31,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806228888] [2023-08-23 22:29:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:31,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:31,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:31,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806228888] [2023-08-23 22:29:31,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806228888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:29:31,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521476319] [2023-08-23 22:29:31,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:29:31,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:29:31,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:29:31,637 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) [2023-08-23 22:29:31,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-23 22:29:31,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:29:31,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:29:31,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-23 22:29:31,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:29:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:31,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:29:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:31,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521476319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:29:31,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:29:31,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2023-08-23 22:29:31,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290483605] [2023-08-23 22:29:31,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:29:31,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 22:29:31,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 22:29:31,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-08-23 22:29:31,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 290 [2023-08-23 22:29:31,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 108 transitions, 951 flow. Second operand has 15 states, 15 states have (on average 127.4) internal successors, (1911), 15 states have internal predecessors, (1911), 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) [2023-08-23 22:29:31,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:31,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 290 [2023-08-23 22:29:31,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:32,480 INFO L124 PetriNetUnfolderBase]: 1580/2955 cut-off events. [2023-08-23 22:29:32,480 INFO L125 PetriNetUnfolderBase]: For 5876/5876 co-relation queries the response was YES. [2023-08-23 22:29:32,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10280 conditions, 2955 events. 1580/2955 cut-off events. For 5876/5876 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 14576 event pairs, 426 based on Foata normal form. 16/2957 useless extension candidates. Maximal degree in co-relation 7325. Up to 1002 conditions per place. [2023-08-23 22:29:32,509 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 198 selfloop transitions, 48 changer transitions 6/252 dead transitions. [2023-08-23 22:29:32,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 252 transitions, 2170 flow [2023-08-23 22:29:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-23 22:29:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-23 22:29:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2294 transitions. [2023-08-23 22:29:32,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46531440162271803 [2023-08-23 22:29:32,515 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2294 transitions. [2023-08-23 22:29:32,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2294 transitions. [2023-08-23 22:29:32,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:32,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2294 transitions. [2023-08-23 22:29:32,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.94117647058823) internal successors, (2294), 17 states have internal predecessors, (2294), 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) [2023-08-23 22:29:32,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 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) [2023-08-23 22:29:32,528 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 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) [2023-08-23 22:29:32,529 INFO L175 Difference]: Start difference. First operand has 122 places, 108 transitions, 951 flow. Second operand 17 states and 2294 transitions. [2023-08-23 22:29:32,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 252 transitions, 2170 flow [2023-08-23 22:29:32,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 252 transitions, 2107 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-23 22:29:32,559 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 1259 flow [2023-08-23 22:29:32,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1259, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2023-08-23 22:29:32,561 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 107 predicate places. [2023-08-23 22:29:32,561 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 1259 flow [2023-08-23 22:29:32,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 127.4) internal successors, (1911), 15 states have internal predecessors, (1911), 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) [2023-08-23 22:29:32,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:32,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:32,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-23 22:29:32,766 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 [2023-08-23 22:29:32,767 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:32,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash 934646639, now seen corresponding path program 4 times [2023-08-23 22:29:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:32,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256407602] [2023-08-23 22:29:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:33,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256407602] [2023-08-23 22:29:33,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256407602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:29:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171249179] [2023-08-23 22:29:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:29:33,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:29:33,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:29:33,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:29:33,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-23 22:29:33,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:29:33,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:29:33,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-23 22:29:33,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:29:33,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-23 22:29:34,198 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-23 22:29:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:34,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:29:34,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-23 22:29:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:29:34,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171249179] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-23 22:29:34,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-23 22:29:34,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15, 15] total 43 [2023-08-23 22:29:34,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618781865] [2023-08-23 22:29:34,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:29:34,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-23 22:29:34,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-23 22:29:34,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1751, Unknown=0, NotChecked=0, Total=1892 [2023-08-23 22:29:34,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 290 [2023-08-23 22:29:34,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 1259 flow. Second operand has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 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) [2023-08-23 22:29:34,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:34,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 290 [2023-08-23 22:29:34,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:37,366 INFO L124 PetriNetUnfolderBase]: 2832/5250 cut-off events. [2023-08-23 22:29:37,366 INFO L125 PetriNetUnfolderBase]: For 14501/14501 co-relation queries the response was YES. [2023-08-23 22:29:37,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19586 conditions, 5250 events. 2832/5250 cut-off events. For 14501/14501 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 29424 event pairs, 686 based on Foata normal form. 0/5221 useless extension candidates. Maximal degree in co-relation 14314. Up to 1634 conditions per place. [2023-08-23 22:29:37,423 INFO L140 encePairwiseOnDemand]: 274/290 looper letters, 194 selfloop transitions, 140 changer transitions 4/338 dead transitions. [2023-08-23 22:29:37,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 338 transitions, 3324 flow [2023-08-23 22:29:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-23 22:29:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-23 22:29:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2708 transitions. [2023-08-23 22:29:37,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3334975369458128 [2023-08-23 22:29:37,432 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2708 transitions. [2023-08-23 22:29:37,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2708 transitions. [2023-08-23 22:29:37,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:37,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2708 transitions. [2023-08-23 22:29:37,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 96.71428571428571) internal successors, (2708), 28 states have internal predecessors, (2708), 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) [2023-08-23 22:29:37,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 290.0) internal successors, (8410), 29 states have internal predecessors, (8410), 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) [2023-08-23 22:29:37,460 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 290.0) internal successors, (8410), 29 states have internal predecessors, (8410), 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) [2023-08-23 22:29:37,461 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 1259 flow. Second operand 28 states and 2708 transitions. [2023-08-23 22:29:37,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 338 transitions, 3324 flow [2023-08-23 22:29:37,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 338 transitions, 3094 flow, removed 73 selfloop flow, removed 8 redundant places. [2023-08-23 22:29:37,530 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 2262 flow [2023-08-23 22:29:37,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2262, PETRI_PLACES=167, PETRI_TRANSITIONS=204} [2023-08-23 22:29:37,531 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 133 predicate places. [2023-08-23 22:29:37,531 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 2262 flow [2023-08-23 22:29:37,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 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) [2023-08-23 22:29:37,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:37,532 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:37,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-23 22:29:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:29:37,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:37,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1979329675, now seen corresponding path program 5 times [2023-08-23 22:29:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:37,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535360958] [2023-08-23 22:29:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:37,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:38,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535360958] [2023-08-23 22:29:38,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535360958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:29:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135001702] [2023-08-23 22:29:38,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:29:38,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:29:38,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:29:38,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:29:38,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-23 22:29:38,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:29:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:29:38,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-23 22:29:38,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:29:38,716 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-23 22:29:38,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-23 22:29:39,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-23 22:29:39,153 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-23 22:29:39,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-23 22:29:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:39,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:29:39,670 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_315) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-23 22:29:39,680 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_315) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2023-08-23 22:29:39,750 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:29:39,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-23 22:29:39,759 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:29:39,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-23 22:29:39,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-23 22:29:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-08-23 22:29:39,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135001702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:29:39,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:29:39,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 46 [2023-08-23 22:29:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534747128] [2023-08-23 22:29:39,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:29:39,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-23 22:29:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-23 22:29:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1894, Unknown=9, NotChecked=178, Total=2256 [2023-08-23 22:29:39,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-23 22:29:39,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 2262 flow. Second operand has 48 states, 48 states have (on average 87.75) internal successors, (4212), 48 states have internal predecessors, (4212), 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) [2023-08-23 22:29:39,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:39,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-23 22:29:39,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:29:50,229 INFO L124 PetriNetUnfolderBase]: 7231/13702 cut-off events. [2023-08-23 22:29:50,229 INFO L125 PetriNetUnfolderBase]: For 52431/52431 co-relation queries the response was YES. [2023-08-23 22:29:50,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53829 conditions, 13702 events. 7231/13702 cut-off events. For 52431/52431 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 94570 event pairs, 1167 based on Foata normal form. 52/13673 useless extension candidates. Maximal degree in co-relation 38281. Up to 2495 conditions per place. [2023-08-23 22:29:50,325 INFO L140 encePairwiseOnDemand]: 266/290 looper letters, 398 selfloop transitions, 578 changer transitions 17/993 dead transitions. [2023-08-23 22:29:50,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 993 transitions, 10610 flow [2023-08-23 22:29:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-23 22:29:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-23 22:29:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 7042 transitions. [2023-08-23 22:29:50,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3195099818511797 [2023-08-23 22:29:50,339 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 7042 transitions. [2023-08-23 22:29:50,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 7042 transitions. [2023-08-23 22:29:50,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:29:50,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 7042 transitions. [2023-08-23 22:29:50,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 92.65789473684211) internal successors, (7042), 76 states have internal predecessors, (7042), 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) [2023-08-23 22:29:50,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 290.0) internal successors, (22330), 77 states have internal predecessors, (22330), 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) [2023-08-23 22:29:50,383 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 290.0) internal successors, (22330), 77 states have internal predecessors, (22330), 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) [2023-08-23 22:29:50,384 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 2262 flow. Second operand 76 states and 7042 transitions. [2023-08-23 22:29:50,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 993 transitions, 10610 flow [2023-08-23 22:29:50,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 993 transitions, 9958 flow, removed 246 selfloop flow, removed 6 redundant places. [2023-08-23 22:29:50,640 INFO L231 Difference]: Finished difference. Result has 270 places, 657 transitions, 8537 flow [2023-08-23 22:29:50,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=8537, PETRI_PLACES=270, PETRI_TRANSITIONS=657} [2023-08-23 22:29:50,641 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 236 predicate places. [2023-08-23 22:29:50,641 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 657 transitions, 8537 flow [2023-08-23 22:29:50,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 87.75) internal successors, (4212), 48 states have internal predecessors, (4212), 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) [2023-08-23 22:29:50,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:29:50,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:29:50,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-23 22:29:50,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:29:50,847 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:29:50,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:29:50,848 INFO L85 PathProgramCache]: Analyzing trace with hash -723822503, now seen corresponding path program 6 times [2023-08-23 22:29:50,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:29:50,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022456786] [2023-08-23 22:29:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:29:50,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:29:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:29:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:29:51,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:29:51,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022456786] [2023-08-23 22:29:51,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022456786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:29:51,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165585471] [2023-08-23 22:29:51,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-23 22:29:51,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:29:51,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:29:51,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:29:51,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-23 22:29:51,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-23 22:29:51,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:29:51,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-23 22:29:51,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:29:51,827 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-23 22:29:51,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-23 22:29:52,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-23 22:29:52,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-08-23 22:29:52,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2023-08-23 22:29:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:29:52,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:29:52,641 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_369 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_369) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2023-08-23 22:29:52,706 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:29:52,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-23 22:29:52,713 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:29:52,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-23 22:29:52,722 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-23 22:29:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:29:52,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165585471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:29:52,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:29:52,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2023-08-23 22:29:52,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304740565] [2023-08-23 22:29:52,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:29:52,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-23 22:29:52,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:29:52,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-23 22:29:52,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1820, Unknown=15, NotChecked=86, Total=2070 [2023-08-23 22:29:52,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-23 22:29:52,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 657 transitions, 8537 flow. Second operand has 46 states, 46 states have (on average 87.82608695652173) internal successors, (4040), 46 states have internal predecessors, (4040), 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) [2023-08-23 22:29:52,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:29:52,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-23 22:29:52,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:30:07,252 INFO L124 PetriNetUnfolderBase]: 11458/22159 cut-off events. [2023-08-23 22:30:07,253 INFO L125 PetriNetUnfolderBase]: For 772795/772795 co-relation queries the response was YES. [2023-08-23 22:30:07,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209142 conditions, 22159 events. 11458/22159 cut-off events. For 772795/772795 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 162737 event pairs, 1585 based on Foata normal form. 85/22113 useless extension candidates. Maximal degree in co-relation 178278. Up to 10105 conditions per place. [2023-08-23 22:30:07,555 INFO L140 encePairwiseOnDemand]: 268/290 looper letters, 435 selfloop transitions, 1092 changer transitions 15/1542 dead transitions. [2023-08-23 22:30:07,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1542 transitions, 24538 flow [2023-08-23 22:30:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-23 22:30:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-23 22:30:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6810 transitions. [2023-08-23 22:30:07,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3173345759552656 [2023-08-23 22:30:07,575 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6810 transitions. [2023-08-23 22:30:07,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6810 transitions. [2023-08-23 22:30:07,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:30:07,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6810 transitions. [2023-08-23 22:30:07,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 92.02702702702703) internal successors, (6810), 74 states have internal predecessors, (6810), 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) [2023-08-23 22:30:07,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 290.0) internal successors, (21750), 75 states have internal predecessors, (21750), 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) [2023-08-23 22:30:07,618 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 290.0) internal successors, (21750), 75 states have internal predecessors, (21750), 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) [2023-08-23 22:30:07,618 INFO L175 Difference]: Start difference. First operand has 270 places, 657 transitions, 8537 flow. Second operand 74 states and 6810 transitions. [2023-08-23 22:30:07,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1542 transitions, 24538 flow [2023-08-23 22:30:09,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1542 transitions, 23798 flow, removed 337 selfloop flow, removed 12 redundant places. [2023-08-23 22:30:09,421 INFO L231 Difference]: Finished difference. Result has 343 places, 1199 transitions, 17632 flow [2023-08-23 22:30:09,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=7960, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=17632, PETRI_PLACES=343, PETRI_TRANSITIONS=1199} [2023-08-23 22:30:09,422 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 309 predicate places. [2023-08-23 22:30:09,422 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1199 transitions, 17632 flow [2023-08-23 22:30:09,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 87.82608695652173) internal successors, (4040), 46 states have internal predecessors, (4040), 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) [2023-08-23 22:30:09,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:30:09,423 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:30:09,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-23 22:30:09,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-23 22:30:09,628 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:30:09,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:30:09,629 INFO L85 PathProgramCache]: Analyzing trace with hash -277182823, now seen corresponding path program 1 times [2023-08-23 22:30:09,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:30:09,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351037233] [2023-08-23 22:30:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:30:09,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:30:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:30:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:30:09,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:30:09,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351037233] [2023-08-23 22:30:09,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351037233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:30:09,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323628481] [2023-08-23 22:30:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:30:09,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:30:09,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:30:09,897 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:30:09,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-23 22:30:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:30:10,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-23 22:30:10,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:30:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-23 22:30:10,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:30:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-23 22:30:10,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323628481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:30:10,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:30:10,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-08-23 22:30:10,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256961722] [2023-08-23 22:30:10,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:30:10,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-23 22:30:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:30:10,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-23 22:30:10,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-23 22:30:10,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 290 [2023-08-23 22:30:10,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1199 transitions, 17632 flow. Second operand has 13 states, 13 states have (on average 126.6923076923077) internal successors, (1647), 13 states have internal predecessors, (1647), 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) [2023-08-23 22:30:10,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:30:10,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 290 [2023-08-23 22:30:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:30:18,138 INFO L124 PetriNetUnfolderBase]: 12339/23924 cut-off events. [2023-08-23 22:30:18,138 INFO L125 PetriNetUnfolderBase]: For 1035123/1035123 co-relation queries the response was YES. [2023-08-23 22:30:18,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244881 conditions, 23924 events. 12339/23924 cut-off events. For 1035123/1035123 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 180361 event pairs, 2794 based on Foata normal form. 67/23860 useless extension candidates. Maximal degree in co-relation 211540. Up to 11821 conditions per place. [2023-08-23 22:30:18,449 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 1123 selfloop transitions, 435 changer transitions 14/1572 dead transitions. [2023-08-23 22:30:18,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1572 transitions, 26399 flow [2023-08-23 22:30:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-23 22:30:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-23 22:30:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2117 transitions. [2023-08-23 22:30:18,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2023-08-23 22:30:18,453 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2117 transitions. [2023-08-23 22:30:18,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2117 transitions. [2023-08-23 22:30:18,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:30:18,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2117 transitions. [2023-08-23 22:30:18,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 132.3125) internal successors, (2117), 16 states have internal predecessors, (2117), 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) [2023-08-23 22:30:18,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 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) [2023-08-23 22:30:18,460 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 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) [2023-08-23 22:30:18,461 INFO L175 Difference]: Start difference. First operand has 343 places, 1199 transitions, 17632 flow. Second operand 16 states and 2117 transitions. [2023-08-23 22:30:18,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1572 transitions, 26399 flow [2023-08-23 22:30:20,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1572 transitions, 24702 flow, removed 505 selfloop flow, removed 15 redundant places. [2023-08-23 22:30:20,562 INFO L231 Difference]: Finished difference. Result has 351 places, 1268 transitions, 18868 flow [2023-08-23 22:30:20,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=16117, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=18868, PETRI_PLACES=351, PETRI_TRANSITIONS=1268} [2023-08-23 22:30:20,563 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 317 predicate places. [2023-08-23 22:30:20,563 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1268 transitions, 18868 flow [2023-08-23 22:30:20,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 126.6923076923077) internal successors, (1647), 13 states have internal predecessors, (1647), 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) [2023-08-23 22:30:20,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:30:20,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:30:20,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-23 22:30:20,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:30:20,771 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:30:20,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:30:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2131210369, now seen corresponding path program 1 times [2023-08-23 22:30:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:30:20,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304993712] [2023-08-23 22:30:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:30:20,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:30:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:30:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:30:21,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:30:21,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304993712] [2023-08-23 22:30:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304993712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:30:21,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699428171] [2023-08-23 22:30:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:30:21,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:30:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:30:21,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:30:21,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-23 22:30:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:30:22,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-23 22:30:22,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:30:22,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-23 22:30:22,476 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-08-23 22:30:22,930 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-23 22:30:22,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 32 [2023-08-23 22:30:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:30:22,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:30:23,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-08-23 22:30:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:30:24,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699428171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:30:24,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:30:24,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 60 [2023-08-23 22:30:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369278292] [2023-08-23 22:30:24,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:30:24,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-08-23 22:30:24,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:30:24,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-08-23 22:30:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=3406, Unknown=0, NotChecked=0, Total=3782 [2023-08-23 22:30:24,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 290 [2023-08-23 22:30:24,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1268 transitions, 18868 flow. Second operand has 62 states, 62 states have (on average 91.74193548387096) internal successors, (5688), 62 states have internal predecessors, (5688), 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) [2023-08-23 22:30:24,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:30:24,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 290 [2023-08-23 22:30:24,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:30:41,626 INFO L124 PetriNetUnfolderBase]: 15357/30143 cut-off events. [2023-08-23 22:30:41,626 INFO L125 PetriNetUnfolderBase]: For 1324961/1324961 co-relation queries the response was YES. [2023-08-23 22:30:41,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307587 conditions, 30143 events. 15357/30143 cut-off events. For 1324961/1324961 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 238200 event pairs, 3285 based on Foata normal form. 306/30318 useless extension candidates. Maximal degree in co-relation 274453. Up to 15311 conditions per place. [2023-08-23 22:30:42,082 INFO L140 encePairwiseOnDemand]: 272/290 looper letters, 1285 selfloop transitions, 727 changer transitions 105/2117 dead transitions. [2023-08-23 22:30:42,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 2117 transitions, 37014 flow [2023-08-23 22:30:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-23 22:30:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-23 22:30:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6637 transitions. [2023-08-23 22:30:42,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3316841579210395 [2023-08-23 22:30:42,090 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6637 transitions. [2023-08-23 22:30:42,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6637 transitions. [2023-08-23 22:30:42,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:30:42,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6637 transitions. [2023-08-23 22:30:42,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 96.18840579710145) internal successors, (6637), 69 states have internal predecessors, (6637), 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) [2023-08-23 22:30:42,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 290.0) internal successors, (20300), 70 states have internal predecessors, (20300), 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) [2023-08-23 22:30:42,113 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 290.0) internal successors, (20300), 70 states have internal predecessors, (20300), 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) [2023-08-23 22:30:42,113 INFO L175 Difference]: Start difference. First operand has 351 places, 1268 transitions, 18868 flow. Second operand 69 states and 6637 transitions. [2023-08-23 22:30:42,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 2117 transitions, 37014 flow [2023-08-23 22:30:45,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 2117 transitions, 36541 flow, removed 228 selfloop flow, removed 3 redundant places. [2023-08-23 22:30:45,276 INFO L231 Difference]: Finished difference. Result has 450 places, 1606 transitions, 26857 flow [2023-08-23 22:30:45,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=18683, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=26857, PETRI_PLACES=450, PETRI_TRANSITIONS=1606} [2023-08-23 22:30:45,278 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 416 predicate places. [2023-08-23 22:30:45,278 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1606 transitions, 26857 flow [2023-08-23 22:30:45,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 91.74193548387096) internal successors, (5688), 62 states have internal predecessors, (5688), 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) [2023-08-23 22:30:45,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:30:45,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:30:45,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-23 22:30:45,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:30:45,479 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:30:45,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:30:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1071599769, now seen corresponding path program 2 times [2023-08-23 22:30:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:30:45,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621210339] [2023-08-23 22:30:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:30:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:30:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:30:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:30:46,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:30:46,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621210339] [2023-08-23 22:30:46,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621210339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:30:46,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099843027] [2023-08-23 22:30:46,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:30:46,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:30:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:30:46,556 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:30:46,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-23 22:30:46,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:30:46,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:30:46,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-23 22:30:46,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:30:46,691 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-23 22:30:46,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-23 22:30:46,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-23 22:30:46,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-23 22:30:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:30:47,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-23 22:30:47,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-23 22:30:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:30:47,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:30:48,186 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_552 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_552) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-23 22:30:48,192 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:30:48,192 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-23 22:30:48,198 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:30:48,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-23 22:30:48,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-23 22:30:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:30:48,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099843027] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:30:48,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:30:48,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 59 [2023-08-23 22:30:48,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203324030] [2023-08-23 22:30:48,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:30:48,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-08-23 22:30:48,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:30:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-08-23 22:30:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3326, Unknown=1, NotChecked=116, Total=3660 [2023-08-23 22:30:48,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-23 22:30:48,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1606 transitions, 26857 flow. Second operand has 61 states, 61 states have (on average 87.70491803278688) internal successors, (5350), 61 states have internal predecessors, (5350), 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) [2023-08-23 22:30:48,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:30:48,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-23 22:30:48,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:31:27,022 INFO L124 PetriNetUnfolderBase]: 23304/46354 cut-off events. [2023-08-23 22:31:27,023 INFO L125 PetriNetUnfolderBase]: For 2278806/2278806 co-relation queries the response was YES. [2023-08-23 22:31:28,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502095 conditions, 46354 events. 23304/46354 cut-off events. For 2278806/2278806 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 394750 event pairs, 2861 based on Foata normal form. 416/46574 useless extension candidates. Maximal degree in co-relation 481138. Up to 20559 conditions per place. [2023-08-23 22:31:28,217 INFO L140 encePairwiseOnDemand]: 273/290 looper letters, 762 selfloop transitions, 2344 changer transitions 83/3189 dead transitions. [2023-08-23 22:31:28,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 3189 transitions, 62691 flow [2023-08-23 22:31:28,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-08-23 22:31:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-08-23 22:31:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 9016 transitions. [2023-08-23 22:31:28,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31724137931034485 [2023-08-23 22:31:28,228 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 9016 transitions. [2023-08-23 22:31:28,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 9016 transitions. [2023-08-23 22:31:28,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:31:28,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 9016 transitions. [2023-08-23 22:31:28,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 92.0) internal successors, (9016), 98 states have internal predecessors, (9016), 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) [2023-08-23 22:31:28,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 290.0) internal successors, (28710), 99 states have internal predecessors, (28710), 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) [2023-08-23 22:31:28,414 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 290.0) internal successors, (28710), 99 states have internal predecessors, (28710), 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) [2023-08-23 22:31:28,415 INFO L175 Difference]: Start difference. First operand has 450 places, 1606 transitions, 26857 flow. Second operand 98 states and 9016 transitions. [2023-08-23 22:31:28,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 3189 transitions, 62691 flow [2023-08-23 22:31:33,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 3189 transitions, 60542 flow, removed 1050 selfloop flow, removed 12 redundant places. [2023-08-23 22:31:33,976 INFO L231 Difference]: Finished difference. Result has 546 places, 2566 transitions, 48729 flow [2023-08-23 22:31:33,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=25886, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=48729, PETRI_PLACES=546, PETRI_TRANSITIONS=2566} [2023-08-23 22:31:33,978 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 512 predicate places. [2023-08-23 22:31:33,978 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 2566 transitions, 48729 flow [2023-08-23 22:31:33,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 87.70491803278688) internal successors, (5350), 61 states have internal predecessors, (5350), 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) [2023-08-23 22:31:33,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:31:33,979 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:31:33,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-23 22:31:34,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-23 22:31:34,185 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:31:34,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:31:34,185 INFO L85 PathProgramCache]: Analyzing trace with hash -288350104, now seen corresponding path program 2 times [2023-08-23 22:31:34,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:31:34,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655041953] [2023-08-23 22:31:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:31:34,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:31:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:31:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:31:34,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:31:34,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655041953] [2023-08-23 22:31:34,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655041953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:31:34,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029286994] [2023-08-23 22:31:34,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:31:34,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:31:34,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:31:34,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:31:34,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-23 22:31:34,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:31:34,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:31:34,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-23 22:31:34,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:31:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:31:34,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:31:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:31:34,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029286994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:31:34,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:31:34,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2023-08-23 22:31:34,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893581735] [2023-08-23 22:31:34,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:31:34,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-23 22:31:34,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:31:34,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-23 22:31:34,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-23 22:31:34,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 290 [2023-08-23 22:31:34,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 2566 transitions, 48729 flow. Second operand has 19 states, 19 states have (on average 126.3157894736842) internal successors, (2400), 19 states have internal predecessors, (2400), 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) [2023-08-23 22:31:34,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:31:34,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 290 [2023-08-23 22:31:34,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:32:07,905 INFO L124 PetriNetUnfolderBase]: 25751/51375 cut-off events. [2023-08-23 22:32:07,905 INFO L125 PetriNetUnfolderBase]: For 2617098/2617098 co-relation queries the response was YES. [2023-08-23 22:32:09,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569513 conditions, 51375 events. 25751/51375 cut-off events. For 2617098/2617098 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 445496 event pairs, 6219 based on Foata normal form. 185/51425 useless extension candidates. Maximal degree in co-relation 543364. Up to 22660 conditions per place. [2023-08-23 22:32:09,438 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 1474 selfloop transitions, 1972 changer transitions 16/3462 dead transitions. [2023-08-23 22:32:09,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 3462 transitions, 72618 flow [2023-08-23 22:32:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-23 22:32:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-23 22:32:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3140 transitions. [2023-08-23 22:32:09,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511494252873563 [2023-08-23 22:32:09,442 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3140 transitions. [2023-08-23 22:32:09,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3140 transitions. [2023-08-23 22:32:09,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:32:09,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3140 transitions. [2023-08-23 22:32:09,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 130.83333333333334) internal successors, (3140), 24 states have internal predecessors, (3140), 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) [2023-08-23 22:32:09,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 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) [2023-08-23 22:32:09,450 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 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) [2023-08-23 22:32:09,451 INFO L175 Difference]: Start difference. First operand has 546 places, 2566 transitions, 48729 flow. Second operand 24 states and 3140 transitions. [2023-08-23 22:32:09,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 3462 transitions, 72618 flow [2023-08-23 22:32:18,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 3462 transitions, 68680 flow, removed 1893 selfloop flow, removed 22 redundant places. [2023-08-23 22:32:18,099 INFO L231 Difference]: Finished difference. Result has 552 places, 2792 transitions, 56627 flow [2023-08-23 22:32:18,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=45705, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=56627, PETRI_PLACES=552, PETRI_TRANSITIONS=2792} [2023-08-23 22:32:18,101 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 518 predicate places. [2023-08-23 22:32:18,102 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 2792 transitions, 56627 flow [2023-08-23 22:32:18,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 126.3157894736842) internal successors, (2400), 19 states have internal predecessors, (2400), 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) [2023-08-23 22:32:18,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:32:18,102 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-08-23 22:32:18,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-23 22:32:18,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-23 22:32:18,307 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:32:18,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:32:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash 674057269, now seen corresponding path program 3 times [2023-08-23 22:32:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:32:18,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867013600] [2023-08-23 22:32:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:32:18,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:32:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:32:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:32:18,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:32:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867013600] [2023-08-23 22:32:18,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867013600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:32:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780476230] [2023-08-23 22:32:18,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:32:18,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:32:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:32:18,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:32:18,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-23 22:32:18,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-23 22:32:18,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:32:18,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-23 22:32:18,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:32:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:32:18,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-23 22:32:18,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780476230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:32:18,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-23 22:32:18,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-23 22:32:18,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329534578] [2023-08-23 22:32:18,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:32:18,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-23 22:32:18,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:32:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-23 22:32:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-23 22:32:18,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 290 [2023-08-23 22:32:18,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 2792 transitions, 56627 flow. Second operand has 8 states, 8 states have (on average 142.5) internal successors, (1140), 8 states have internal predecessors, (1140), 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) [2023-08-23 22:32:18,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:32:18,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 290 [2023-08-23 22:32:18,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:32:50,078 INFO L124 PetriNetUnfolderBase]: 23139/46296 cut-off events. [2023-08-23 22:32:50,078 INFO L125 PetriNetUnfolderBase]: For 2170920/2170946 co-relation queries the response was YES. [2023-08-23 22:32:51,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496234 conditions, 46296 events. 23139/46296 cut-off events. For 2170920/2170946 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 404629 event pairs, 4800 based on Foata normal form. 1496/47773 useless extension candidates. Maximal degree in co-relation 478413. Up to 23884 conditions per place. [2023-08-23 22:32:51,388 INFO L140 encePairwiseOnDemand]: 286/290 looper letters, 1265 selfloop transitions, 13 changer transitions 1711/3176 dead transitions. [2023-08-23 22:32:51,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 3176 transitions, 68424 flow [2023-08-23 22:32:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-23 22:32:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-23 22:32:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1237 transitions. [2023-08-23 22:32:51,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331896551724138 [2023-08-23 22:32:51,390 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1237 transitions. [2023-08-23 22:32:51,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1237 transitions. [2023-08-23 22:32:51,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:32:51,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1237 transitions. [2023-08-23 22:32:51,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.625) internal successors, (1237), 8 states have internal predecessors, (1237), 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) [2023-08-23 22:32:51,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 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) [2023-08-23 22:32:51,394 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 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) [2023-08-23 22:32:51,394 INFO L175 Difference]: Start difference. First operand has 552 places, 2792 transitions, 56627 flow. Second operand 8 states and 1237 transitions. [2023-08-23 22:32:51,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 3176 transitions, 68424 flow [2023-08-23 22:32:59,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 3176 transitions, 65390 flow, removed 905 selfloop flow, removed 11 redundant places. [2023-08-23 22:32:59,365 INFO L231 Difference]: Finished difference. Result has 548 places, 1126 transitions, 19807 flow [2023-08-23 22:32:59,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=35968, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1912, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19807, PETRI_PLACES=548, PETRI_TRANSITIONS=1126} [2023-08-23 22:32:59,366 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 514 predicate places. [2023-08-23 22:32:59,367 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 1126 transitions, 19807 flow [2023-08-23 22:32:59,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.5) internal successors, (1140), 8 states have internal predecessors, (1140), 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) [2023-08-23 22:32:59,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:32:59,367 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:32:59,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-23 22:32:59,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-23 22:32:59,576 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:32:59,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:32:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1429281689, now seen corresponding path program 3 times [2023-08-23 22:32:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:32:59,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187563440] [2023-08-23 22:32:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:32:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:32:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:32:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:32:59,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:32:59,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187563440] [2023-08-23 22:32:59,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187563440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:32:59,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044819900] [2023-08-23 22:32:59,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:32:59,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:32:59,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:32:59,875 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:32:59,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-23 22:33:00,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-23 22:33:00,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:33:00,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-23 22:33:00,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:33:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-23 22:33:00,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:33:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-23 22:33:00,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044819900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:33:00,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:33:00,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 17 [2023-08-23 22:33:00,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512917442] [2023-08-23 22:33:00,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:33:00,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-23 22:33:00,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:33:00,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-23 22:33:00,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-08-23 22:33:00,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 290 [2023-08-23 22:33:00,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 1126 transitions, 19807 flow. Second operand has 18 states, 18 states have (on average 126.33333333333333) internal successors, (2274), 18 states have internal predecessors, (2274), 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) [2023-08-23 22:33:00,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:33:00,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 290 [2023-08-23 22:33:00,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:33:10,359 INFO L124 PetriNetUnfolderBase]: 11067/23000 cut-off events. [2023-08-23 22:33:10,359 INFO L125 PetriNetUnfolderBase]: For 1087240/1087240 co-relation queries the response was YES. [2023-08-23 22:33:10,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255571 conditions, 23000 events. 11067/23000 cut-off events. For 1087240/1087240 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 187174 event pairs, 2440 based on Foata normal form. 14/23014 useless extension candidates. Maximal degree in co-relation 245619. Up to 10937 conditions per place. [2023-08-23 22:33:10,736 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 735 selfloop transitions, 560 changer transitions 80/1375 dead transitions. [2023-08-23 22:33:10,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1375 transitions, 26615 flow [2023-08-23 22:33:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-23 22:33:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-23 22:33:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2507 transitions. [2023-08-23 22:33:10,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45499092558983667 [2023-08-23 22:33:10,743 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2507 transitions. [2023-08-23 22:33:10,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2507 transitions. [2023-08-23 22:33:10,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:33:10,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2507 transitions. [2023-08-23 22:33:10,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 131.94736842105263) internal successors, (2507), 19 states have internal predecessors, (2507), 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) [2023-08-23 22:33:10,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 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) [2023-08-23 22:33:10,750 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 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) [2023-08-23 22:33:10,750 INFO L175 Difference]: Start difference. First operand has 548 places, 1126 transitions, 19807 flow. Second operand 19 states and 2507 transitions. [2023-08-23 22:33:10,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1375 transitions, 26615 flow [2023-08-23 22:33:13,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1375 transitions, 23516 flow, removed 570 selfloop flow, removed 40 redundant places. [2023-08-23 22:33:13,877 INFO L231 Difference]: Finished difference. Result has 525 places, 1115 transitions, 18058 flow [2023-08-23 22:33:13,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=16903, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=18058, PETRI_PLACES=525, PETRI_TRANSITIONS=1115} [2023-08-23 22:33:13,878 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 491 predicate places. [2023-08-23 22:33:13,878 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 1115 transitions, 18058 flow [2023-08-23 22:33:13,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 126.33333333333333) internal successors, (2274), 18 states have internal predecessors, (2274), 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) [2023-08-23 22:33:13,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:33:13,878 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:33:13,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-23 22:33:14,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-23 22:33:14,079 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:33:14,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:33:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1088570660, now seen corresponding path program 3 times [2023-08-23 22:33:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:33:14,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313514040] [2023-08-23 22:33:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:33:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:33:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:33:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:33:15,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:33:15,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313514040] [2023-08-23 22:33:15,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313514040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:33:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587976393] [2023-08-23 22:33:15,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:33:15,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:33:15,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:33:15,359 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:33:15,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-23 22:33:15,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-23 22:33:15,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:33:15,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-23 22:33:15,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:33:15,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-23 22:33:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:33:16,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-23 22:33:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:33:16,325 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-23 22:33:16,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-23 22:33:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:33:16,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:33:18,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-23 22:33:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:33:18,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587976393] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:33:18,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:33:18,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2023-08-23 22:33:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987854535] [2023-08-23 22:33:18,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:33:18,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-08-23 22:33:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:33:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-08-23 22:33:18,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=5427, Unknown=0, NotChecked=0, Total=5700 [2023-08-23 22:33:18,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 290 [2023-08-23 22:33:18,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1115 transitions, 18058 flow. Second operand has 76 states, 76 states have (on average 92.01315789473684) internal successors, (6993), 76 states have internal predecessors, (6993), 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) [2023-08-23 22:33:18,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:33:18,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 290 [2023-08-23 22:33:18,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:34:06,894 INFO L124 PetriNetUnfolderBase]: 10822/23455 cut-off events. [2023-08-23 22:34:06,894 INFO L125 PetriNetUnfolderBase]: For 717227/717227 co-relation queries the response was YES. [2023-08-23 22:34:07,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215486 conditions, 23455 events. 10822/23455 cut-off events. For 717227/717227 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 197236 event pairs, 1429 based on Foata normal form. 81/23536 useless extension candidates. Maximal degree in co-relation 212291. Up to 9917 conditions per place. [2023-08-23 22:34:07,258 INFO L140 encePairwiseOnDemand]: 274/290 looper letters, 780 selfloop transitions, 1153 changer transitions 623/2556 dead transitions. [2023-08-23 22:34:07,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 2556 transitions, 44628 flow [2023-08-23 22:34:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-08-23 22:34:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2023-08-23 22:34:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 13760 transitions. [2023-08-23 22:34:07,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3272294887039239 [2023-08-23 22:34:07,271 INFO L72 ComplementDD]: Start complementDD. Operand 145 states and 13760 transitions. [2023-08-23 22:34:07,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 145 states and 13760 transitions. [2023-08-23 22:34:07,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:34:07,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 145 states and 13760 transitions. [2023-08-23 22:34:07,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 146 states, 145 states have (on average 94.89655172413794) internal successors, (13760), 145 states have internal predecessors, (13760), 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) [2023-08-23 22:34:07,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 146 states, 146 states have (on average 290.0) internal successors, (42340), 146 states have internal predecessors, (42340), 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) [2023-08-23 22:34:07,322 INFO L81 ComplementDD]: Finished complementDD. Result has 146 states, 146 states have (on average 290.0) internal successors, (42340), 146 states have internal predecessors, (42340), 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) [2023-08-23 22:34:07,322 INFO L175 Difference]: Start difference. First operand has 525 places, 1115 transitions, 18058 flow. Second operand 145 states and 13760 transitions. [2023-08-23 22:34:07,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 2556 transitions, 44628 flow [2023-08-23 22:34:09,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 2556 transitions, 43134 flow, removed 146 selfloop flow, removed 18 redundant places. [2023-08-23 22:34:10,009 INFO L231 Difference]: Finished difference. Result has 665 places, 1359 transitions, 22513 flow [2023-08-23 22:34:10,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=16963, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=145, PETRI_FLOW=22513, PETRI_PLACES=665, PETRI_TRANSITIONS=1359} [2023-08-23 22:34:10,010 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 631 predicate places. [2023-08-23 22:34:10,011 INFO L495 AbstractCegarLoop]: Abstraction has has 665 places, 1359 transitions, 22513 flow [2023-08-23 22:34:10,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 92.01315789473684) internal successors, (6993), 76 states have internal predecessors, (6993), 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) [2023-08-23 22:34:10,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:34:10,012 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:34:10,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-23 22:34:10,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:34:10,218 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:34:10,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:34:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1909042378, now seen corresponding path program 4 times [2023-08-23 22:34:10,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:34:10,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564727603] [2023-08-23 22:34:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:34:10,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:34:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:34:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:34:11,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:34:11,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564727603] [2023-08-23 22:34:11,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564727603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:34:11,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252967123] [2023-08-23 22:34:11,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:34:11,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:34:11,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:34:11,804 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:34:11,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-23 22:34:11,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:34:11,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:34:11,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 107 conjunts are in the unsatisfiable core [2023-08-23 22:34:11,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:34:11,957 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-23 22:34:11,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-23 22:34:12,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-23 22:34:12,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-23 22:34:12,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:34:12,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-23 22:34:12,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:34:12,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-23 22:34:13,255 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-23 22:34:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:34:13,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:34:15,401 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:34:15,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-23 22:34:15,409 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:34:15,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-23 22:34:15,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-23 22:34:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:34:15,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252967123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:34:15,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:34:15,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 26] total 80 [2023-08-23 22:34:15,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810869205] [2023-08-23 22:34:15,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:34:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-08-23 22:34:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:34:15,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-08-23 22:34:15,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=6226, Unknown=0, NotChecked=0, Total=6642 [2023-08-23 22:34:15,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-23 22:34:15,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 665 places, 1359 transitions, 22513 flow. Second operand has 82 states, 82 states have (on average 87.86585365853658) internal successors, (7205), 82 states have internal predecessors, (7205), 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) [2023-08-23 22:34:15,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:34:15,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-23 22:34:15,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:34:37,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:34:42,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:34:44,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:34:57,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:35:10,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:35:12,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:35:37,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:36:00,195 WARN L234 SmtUtils]: Spent 21.25s on a formula simplification. DAG size of input: 135 DAG size of output: 121 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:36:12,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:36:14,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:36:32,201 WARN L234 SmtUtils]: Spent 9.51s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:37:05,214 WARN L234 SmtUtils]: Spent 32.54s on a formula simplification. DAG size of input: 119 DAG size of output: 119 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:37:08,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:37:36,961 WARN L234 SmtUtils]: Spent 27.87s on a formula simplification. DAG size of input: 127 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:37:39,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:37:42,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:37:45,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:37:47,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:37:50,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:38:08,724 WARN L234 SmtUtils]: Spent 16.55s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:38:17,962 WARN L234 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 148 DAG size of output: 135 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:38:24,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:38:27,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:38:29,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:38:32,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:38:34,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:38:36,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:38:38,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:39:23,483 WARN L234 SmtUtils]: Spent 7.59s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:39:47,002 WARN L234 SmtUtils]: Spent 11.42s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:39:53,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:40:18,794 WARN L234 SmtUtils]: Spent 11.94s on a formula simplification. DAG size of input: 120 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:40:37,527 WARN L234 SmtUtils]: Spent 17.88s on a formula simplification. DAG size of input: 129 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:40:49,645 WARN L234 SmtUtils]: Spent 9.85s on a formula simplification. DAG size of input: 129 DAG size of output: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:41:12,412 WARN L234 SmtUtils]: Spent 22.20s on a formula simplification. DAG size of input: 138 DAG size of output: 120 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:41:18,302 INFO L124 PetriNetUnfolderBase]: 11195/23948 cut-off events. [2023-08-23 22:41:18,302 INFO L125 PetriNetUnfolderBase]: For 710180/710180 co-relation queries the response was YES. [2023-08-23 22:41:18,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224807 conditions, 23948 events. 11195/23948 cut-off events. For 710180/710180 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 199429 event pairs, 1501 based on Foata normal form. 89/24037 useless extension candidates. Maximal degree in co-relation 220372. Up to 10120 conditions per place. [2023-08-23 22:41:18,920 INFO L140 encePairwiseOnDemand]: 269/290 looper letters, 896 selfloop transitions, 928 changer transitions 911/2735 dead transitions. [2023-08-23 22:41:18,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 792 places, 2735 transitions, 50330 flow [2023-08-23 22:41:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-08-23 22:41:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2023-08-23 22:41:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 13409 transitions. [2023-08-23 22:41:18,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31454374853389633 [2023-08-23 22:41:18,933 INFO L72 ComplementDD]: Start complementDD. Operand 147 states and 13409 transitions. [2023-08-23 22:41:18,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 147 states and 13409 transitions. [2023-08-23 22:41:18,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:18,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 147 states and 13409 transitions. [2023-08-23 22:41:18,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 148 states, 147 states have (on average 91.21768707482993) internal successors, (13409), 147 states have internal predecessors, (13409), 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) [2023-08-23 22:41:18,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 148 states, 148 states have (on average 290.0) internal successors, (42920), 148 states have internal predecessors, (42920), 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) [2023-08-23 22:41:18,979 INFO L81 ComplementDD]: Finished complementDD. Result has 148 states, 148 states have (on average 290.0) internal successors, (42920), 148 states have internal predecessors, (42920), 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) [2023-08-23 22:41:18,979 INFO L175 Difference]: Start difference. First operand has 665 places, 1359 transitions, 22513 flow. Second operand 147 states and 13409 transitions. [2023-08-23 22:41:18,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 792 places, 2735 transitions, 50330 flow [2023-08-23 22:41:22,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 721 places, 2735 transitions, 48362 flow, removed 372 selfloop flow, removed 71 redundant places. [2023-08-23 22:41:22,514 INFO L231 Difference]: Finished difference. Result has 800 places, 1298 transitions, 23388 flow [2023-08-23 22:41:22,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=21187, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=147, PETRI_FLOW=23388, PETRI_PLACES=800, PETRI_TRANSITIONS=1298} [2023-08-23 22:41:22,515 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 766 predicate places. [2023-08-23 22:41:22,515 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 1298 transitions, 23388 flow [2023-08-23 22:41:22,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 87.86585365853658) internal successors, (7205), 82 states have internal predecessors, (7205), 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) [2023-08-23 22:41:22,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:22,516 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:22,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:22,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-23 22:41:22,716 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:41:22,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:22,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1701532650, now seen corresponding path program 5 times [2023-08-23 22:41:22,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:22,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893864469] [2023-08-23 22:41:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:22,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:25,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:25,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893864469] [2023-08-23 22:41:25,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893864469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:25,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410491836] [2023-08-23 22:41:25,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:41:25,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:25,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:25,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:41:25,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-23 22:41:25,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-23 22:41:25,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:25,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-23 22:41:25,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:26,021 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-23 22:41:26,021 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-23 22:41:26,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-23 22:41:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:41:27,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-23 22:41:28,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:41:28,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-23 22:41:28,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-23 22:41:30,701 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-23 22:41:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:30,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:32,481 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1044 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1044) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset| (- 8))) 4294967296)))) is different from false [2023-08-23 22:41:55,404 INFO L322 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-23 22:41:55,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2023-08-23 22:41:55,423 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:41:55,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2023-08-23 22:41:55,430 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-23 22:42:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:08,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410491836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:08,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:08,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 29] total 90 [2023-08-23 22:42:08,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869712024] [2023-08-23 22:42:08,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:08,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-08-23 22:42:08,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-08-23 22:42:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=7717, Unknown=56, NotChecked=178, Total=8372 [2023-08-23 22:42:08,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-23 22:42:08,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 1298 transitions, 23388 flow. Second operand has 92 states, 92 states have (on average 87.66304347826087) internal successors, (8065), 92 states have internal predecessors, (8065), 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) [2023-08-23 22:42:08,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:08,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-23 22:42:08,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-23 22:42:44,122 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-23 22:42:44,122 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-23 22:42:45,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:45,323 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-08-23 22:42:45,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2023-08-23 22:42:45,347 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-23 22:42:45,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-23 22:42:45,347 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-23 22:42:45,348 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-23 22:42:45,348 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-23 22:42:45,348 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-23 22:42:45,348 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-23 22:42:45,349 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-23 22:42:45,349 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 3, 3, 1, 1, 1, 1] [2023-08-23 22:42:45,352 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-23 22:42:45,352 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-23 22:42:45,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.08 10:42:45 BasicIcfg [2023-08-23 22:42:45,358 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-23 22:42:45,358 INFO L158 Benchmark]: Toolchain (without parser) took 807781.03ms. Allocated memory was 356.5MB in the beginning and 12.9GB in the end (delta: 12.6GB). Free memory was 331.8MB in the beginning and 10.6GB in the end (delta: -10.2GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2023-08-23 22:42:45,358 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 356.5MB. Free memory is still 333.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 22:42:45,359 INFO L158 Benchmark]: CACSL2BoogieTranslator took 627.23ms. Allocated memory is still 356.5MB. Free memory was 331.8MB in the beginning and 302.4MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-23 22:42:45,359 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.64ms. Allocated memory is still 356.5MB. Free memory was 302.4MB in the beginning and 299.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:42:45,361 INFO L158 Benchmark]: Boogie Preprocessor took 39.71ms. Allocated memory is still 356.5MB. Free memory was 299.6MB in the beginning and 297.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:42:45,362 INFO L158 Benchmark]: RCFGBuilder took 398.01ms. Allocated memory is still 356.5MB. Free memory was 297.7MB in the beginning and 332.4MB in the end (delta: -34.8MB). Peak memory consumption was 22.9MB. Max. memory is 16.0GB. [2023-08-23 22:42:45,362 INFO L158 Benchmark]: TraceAbstraction took 806640.20ms. Allocated memory was 356.5MB in the beginning and 12.9GB in the end (delta: 12.6GB). Free memory was 331.4MB in the beginning and 10.6GB in the end (delta: -10.2GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2023-08-23 22:42:45,367 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 356.5MB. Free memory is still 333.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 627.23ms. Allocated memory is still 356.5MB. Free memory was 331.8MB in the beginning and 302.4MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 68.64ms. Allocated memory is still 356.5MB. Free memory was 302.4MB in the beginning and 299.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 39.71ms. Allocated memory is still 356.5MB. Free memory was 299.6MB in the beginning and 297.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 398.01ms. Allocated memory is still 356.5MB. Free memory was 297.7MB in the beginning and 332.4MB in the end (delta: -34.8MB). Peak memory consumption was 22.9MB. Max. memory is 16.0GB. * TraceAbstraction took 806640.20ms. Allocated memory was 356.5MB in the beginning and 12.9GB in the end (delta: 12.6GB). Free memory was 331.4MB in the beginning and 10.6GB in the end (delta: -10.2GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 753]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [753] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 141 PlacesBefore, 34 PlacesAfterwards, 144 TransitionsBefore, 32 TransitionsAfterwards, 6492 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 75 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 25 ConcurrentYvCompositions, 5 ChoiceCompositions, 135 TotalNumberOfCompositions, 8991 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6737, independent: 6555, independent conditional: 0, independent unconditional: 6555, dependent: 182, dependent conditional: 0, dependent unconditional: 182, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3666, independent: 3614, independent conditional: 0, independent unconditional: 3614, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6737, independent: 2941, independent conditional: 0, independent unconditional: 2941, dependent: 130, dependent conditional: 0, dependent unconditional: 130, unknown: 3666, unknown conditional: 0, unknown unconditional: 3666] , Statistics on independence cache: Total cache size (in pairs): 171, Positive cache size: 156, Positive conditional cache size: 0, Positive unconditional cache size: 156, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1022]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1023]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 240 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 806.5s, OverallIterations: 21, TraceHistogramMax: 6, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 726.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 446 mSolverCounterUnknown, 8876 SdHoareTripleChecker+Valid, 113.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8876 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 108.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2123 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 712 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66795 IncrementalHoareTripleChecker+Invalid, 70077 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 712 mSolverCounterUnsat, 2 mSDtfsCounter, 66795 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2036 GetRequests, 648 SyntacticMatches, 47 SemanticMatches, 1341 ConstructedPredicates, 5 IntricatePredicates, 13 DeprecatedPredicates, 58969 ImplicationChecksByTransitivity, 476.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56627occurred in iteration=16, InterpolantAutomatonStates: 797, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 70.5s InterpolantComputationTime, 1120 NumberOfCodeBlocks, 1113 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 1535 ConstructedInterpolants, 54 QuantifiedInterpolants, 21304 SizeOfPredicates, 289 NumberOfNonLiveVariables, 4464 ConjunctsInSsa, 716 ConjunctsInUnsatCore, 48 InterpolantComputations, 9 PerfectInterpolantSequences, 243/1118 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown