/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_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:40:57,546 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:40:57,619 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 22:40:57,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:40:57,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:40:57,660 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:40:57,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:40:57,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:40:57,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:40:57,665 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:40:57,665 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:40:57,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:40:57,666 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:40:57,667 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:40:57,667 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:40:57,667 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:40:57,667 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:40:57,668 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:40:57,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:40:57,668 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:40:57,668 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:40:57,669 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:40:57,669 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:40:57,670 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:40:57,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:40:57,670 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:40:57,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:40:57,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:40:57,671 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:40:57,671 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:40:57,672 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:40:57,672 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:40:57,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:40:57,672 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:40:57,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:40:57,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:40:57,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:40:57,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:40:57,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:40:57,988 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:40:57,989 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:40:57,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-23 22:40:59,061 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:40:59,344 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:40:59,344 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-23 22:40:59,365 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a04c738b5/82b7c9617fb34ec2b4d5d916862b122f/FLAG0685ba366 [2023-08-23 22:40:59,384 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a04c738b5/82b7c9617fb34ec2b4d5d916862b122f [2023-08-23 22:40:59,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:40:59,388 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:40:59,389 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:40:59,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:40:59,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:40:59,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:40:59" (1/1) ... [2023-08-23 22:40:59,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50551cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:40:59, skipping insertion in model container [2023-08-23 22:40:59,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:40:59" (1/1) ... [2023-08-23 22:40:59,459 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:40:59,870 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_longest-2.i[41530,41543] [2023-08-23 22:40:59,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:40:59,912 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:40:59,940 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-23 22:40:59,941 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-23 22:40:59,947 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-23 22:40:59,960 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_longest-2.i[41530,41543] [2023-08-23 22:40:59,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:41:00,042 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:41:00,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00 WrapperNode [2023-08-23 22:41:00,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:41:00,044 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:41:00,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:41:00,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:41:00,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,106 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-08-23 22:41:00,106 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:41:00,107 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:41:00,107 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:41:00,107 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:41:00,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,126 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,126 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,132 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,134 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,136 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,137 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:41:00,153 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:41:00,153 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:41:00,153 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:41:00,154 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (1/1) ... [2023-08-23 22:41:00,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:41:00,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:00,181 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 22:41:00,209 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 22:41:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-23 22:41:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-23 22:41:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-23 22:41:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-23 22:41:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:41:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:41:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 22:41:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:41:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-23 22:41:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:41:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:41:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:41:00,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:41:00,225 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 22:41:00,392 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:41:00,394 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:41:00,683 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:41:00,689 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:41:00,693 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-23 22:41:00,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:41:00 BoogieIcfgContainer [2023-08-23 22:41:00,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:41:00,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:41:00,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:41:00,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:41:00,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:40:59" (1/3) ... [2023-08-23 22:41:00,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42729f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:41:00, skipping insertion in model container [2023-08-23 22:41:00,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:00" (2/3) ... [2023-08-23 22:41:00,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42729f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:41:00, skipping insertion in model container [2023-08-23 22:41:00,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:41:00" (3/3) ... [2023-08-23 22:41:00,723 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-08-23 22:41:00,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:41:00,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-23 22:41:00,739 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:41:00,840 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-23 22:41:00,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 151 transitions, 318 flow [2023-08-23 22:41:00,959 INFO L124 PetriNetUnfolderBase]: 10/149 cut-off events. [2023-08-23 22:41:00,960 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:41:00,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 10/149 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. 0/137 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-08-23 22:41:00,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 151 transitions, 318 flow [2023-08-23 22:41:00,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 140 transitions, 289 flow [2023-08-23 22:41:00,979 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:41:00,991 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 140 transitions, 289 flow [2023-08-23 22:41:00,994 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 140 transitions, 289 flow [2023-08-23 22:41:00,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 140 transitions, 289 flow [2023-08-23 22:41:01,049 INFO L124 PetriNetUnfolderBase]: 10/140 cut-off events. [2023-08-23 22:41:01,049 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:41:01,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 140 events. 10/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 300 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-08-23 22:41:01,056 INFO L119 LiptonReduction]: Number of co-enabled transitions 6492 [2023-08-23 22:41:04,511 INFO L134 LiptonReduction]: Checked pairs total: 8978 [2023-08-23 22:41:04,512 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-23 22:41:04,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:41:04,537 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;@48e1a7f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:41:04,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-23 22:41:04,543 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:41:04,543 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-23 22:41:04,543 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:41:04,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:04,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:41:04,545 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 22:41:04,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:04,549 INFO L85 PathProgramCache]: Analyzing trace with hash 920078475, now seen corresponding path program 1 times [2023-08-23 22:41:04,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:04,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609675224] [2023-08-23 22:41:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:04,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:04,774 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 22:41:04,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:04,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609675224] [2023-08-23 22:41:04,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609675224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:04,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:04,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:41:04,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471247185] [2023-08-23 22:41:04,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:04,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:41:04,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:41:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:41:04,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 282 [2023-08-23 22:41:04,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 22:41:04,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:04,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 282 [2023-08-23 22:41:04,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:04,961 INFO L124 PetriNetUnfolderBase]: 661/1082 cut-off events. [2023-08-23 22:41:04,961 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-23 22:41:04,963 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 4016 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 22:41:04,969 INFO L140 encePairwiseOnDemand]: 277/282 looper letters, 50 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-23 22:41:04,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 227 flow [2023-08-23 22:41:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:41:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:41:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-23 22:41:04,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153664302600472 [2023-08-23 22:41:04,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-23 22:41:04,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-23 22:41:04,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:04,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-23 22:41:04,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 22:41:04,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 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 22:41:04,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 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 22:41:04,997 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 436 transitions. [2023-08-23 22:41:04,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 227 flow [2023-08-23 22:41:05,000 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 22:41:05,001 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-08-23 22:41:05,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, 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 22:41:05,005 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-23 22:41:05,006 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-08-23 22:41:05,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 22:41:05,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:05,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:05,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:41:05,007 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 22:41:05,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:05,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1451273937, now seen corresponding path program 1 times [2023-08-23 22:41:05,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:05,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074267783] [2023-08-23 22:41:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:05,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:05,124 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 22:41:05,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074267783] [2023-08-23 22:41:05,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074267783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:05,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:05,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:41:05,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334559752] [2023-08-23 22:41:05,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:05,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:41:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:41:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:41:05,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 282 [2023-08-23 22:41:05,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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 22:41:05,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:05,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 282 [2023-08-23 22:41:05,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:05,311 INFO L124 PetriNetUnfolderBase]: 593/1022 cut-off events. [2023-08-23 22:41:05,311 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-08-23 22:41:05,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1022 events. 593/1022 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4441 event pairs, 271 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1916. Up to 877 conditions per place. [2023-08-23 22:41:05,318 INFO L140 encePairwiseOnDemand]: 279/282 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-23 22:41:05,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-08-23 22:41:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:41:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:41:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-23 22:41:05,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-08-23 22:41:05,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-23 22:41:05,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-23 22:41:05,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:05,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-23 22:41:05,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 22:41:05,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 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 22:41:05,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 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 22:41:05,331 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 450 transitions. [2023-08-23 22:41:05,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-08-23 22:41:05,333 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 22:41:05,334 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-08-23 22:41:05,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, 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 22:41:05,335 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-23 22:41:05,335 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-08-23 22:41:05,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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 22:41:05,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:05,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:05,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:41:05,339 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 22:41:05,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1760034202, now seen corresponding path program 1 times [2023-08-23 22:41:05,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:05,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142556157] [2023-08-23 22:41:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:05,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:05,496 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 22:41:05,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142556157] [2023-08-23 22:41:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142556157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:05,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091154674] [2023-08-23 22:41:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:05,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:05,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:05,500 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 22:41:05,507 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 22:41:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:05,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-23 22:41:05,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:05,661 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 22:41:05,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:05,699 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 22:41:05,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091154674] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:05,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:05,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-23 22:41:05,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633791979] [2023-08-23 22:41:05,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:05,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-23 22:41:05,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-23 22:41:05,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-23 22:41:05,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 282 [2023-08-23 22:41:05,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 128.4) internal successors, (1284), 10 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:05,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:05,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 282 [2023-08-23 22:41:05,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:06,231 INFO L124 PetriNetUnfolderBase]: 1619/2654 cut-off events. [2023-08-23 22:41:06,232 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-08-23 22:41:06,235 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 12088 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 22:41:06,247 INFO L140 encePairwiseOnDemand]: 274/282 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2023-08-23 22:41:06,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2023-08-23 22:41:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-23 22:41:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-23 22:41:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1687 transitions. [2023-08-23 22:41:06,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4985224586288416 [2023-08-23 22:41:06,252 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1687 transitions. [2023-08-23 22:41:06,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1687 transitions. [2023-08-23 22:41:06,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:06,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1687 transitions. [2023-08-23 22:41:06,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 140.58333333333334) internal successors, (1687), 12 states have internal predecessors, (1687), 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 22:41:06,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 282.0) internal successors, (3666), 13 states have internal predecessors, (3666), 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 22:41:06,263 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 282.0) internal successors, (3666), 13 states have internal predecessors, (3666), 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 22:41:06,263 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1687 transitions. [2023-08-23 22:41:06,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2023-08-23 22:41:06,271 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 22:41:06,273 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-08-23 22:41:06,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, 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 22:41:06,274 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-08-23 22:41:06,274 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-08-23 22:41:06,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 128.4) internal successors, (1284), 10 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:06,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:06,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:06,281 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 22:41:06,481 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 22:41:06,482 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 22:41:06,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1018121817, now seen corresponding path program 1 times [2023-08-23 22:41:06,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:06,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759965186] [2023-08-23 22:41:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:06,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:06,584 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 22:41:06,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:06,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759965186] [2023-08-23 22:41:06,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759965186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:06,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:06,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:41:06,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876301730] [2023-08-23 22:41:06,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:06,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:41:06,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:06,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:41:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:41:06,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 282 [2023-08-23 22:41:06,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 22:41:06,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:06,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 282 [2023-08-23 22:41:06,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:06,713 INFO L124 PetriNetUnfolderBase]: 512/977 cut-off events. [2023-08-23 22:41:06,713 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2023-08-23 22:41:06,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 977 events. 512/977 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4170 event pairs, 98 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 2360. Up to 670 conditions per place. [2023-08-23 22:41:06,718 INFO L140 encePairwiseOnDemand]: 277/282 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-08-23 22:41:06,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 342 flow [2023-08-23 22:41:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:41:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:41:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-23 22:41:06,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059101654846335 [2023-08-23 22:41:06,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-23 22:41:06,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-23 22:41:06,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:06,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-23 22:41:06,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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 22:41:06,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 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 22:41:06,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 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 22:41:06,725 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 428 transitions. [2023-08-23 22:41:06,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 342 flow [2023-08-23 22:41:06,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 321 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-23 22:41:06,732 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-08-23 22:41:06,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, 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 22:41:06,733 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-08-23 22:41:06,734 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-08-23 22:41:06,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 22:41:06,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:06,734 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 22:41:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:41:06,734 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 22:41:06,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1945408692, now seen corresponding path program 1 times [2023-08-23 22:41:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:06,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950872869] [2023-08-23 22:41:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:06,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:06,789 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 22:41:06,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:06,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950872869] [2023-08-23 22:41:06,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950872869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:06,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:06,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:41:06,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450057527] [2023-08-23 22:41:06,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:06,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:41:06,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:41:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:41:06,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 282 [2023-08-23 22:41:06,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 22:41:06,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:06,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 282 [2023-08-23 22:41:06,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:06,955 INFO L124 PetriNetUnfolderBase]: 624/1145 cut-off events. [2023-08-23 22:41:06,955 INFO L125 PetriNetUnfolderBase]: For 351/351 co-relation queries the response was YES. [2023-08-23 22:41:06,957 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 4699 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 22:41:06,960 INFO L140 encePairwiseOnDemand]: 276/282 looper letters, 56 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-23 22:41:06,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 383 flow [2023-08-23 22:41:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:41:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:41:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-23 22:41:06,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2023-08-23 22:41:06,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-23 22:41:06,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-23 22:41:06,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:06,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-23 22:41:06,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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 22:41:06,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 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 22:41:06,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 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 22:41:06,966 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 432 transitions. [2023-08-23 22:41:06,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 383 flow [2023-08-23 22:41:06,969 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 22:41:06,970 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-08-23 22:41:06,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, 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 22:41:06,972 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-08-23 22:41:06,973 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-08-23 22:41:06,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 22:41:06,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:06,973 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 22:41:06,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:41:06,973 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 22:41:06,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash 498757517, now seen corresponding path program 1 times [2023-08-23 22:41:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:06,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678735165] [2023-08-23 22:41:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:06,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:07,639 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 22:41:07,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:07,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678735165] [2023-08-23 22:41:07,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678735165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:07,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:07,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-23 22:41:07,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532851773] [2023-08-23 22:41:07,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:07,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-23 22:41:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-23 22:41:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-23 22:41:07,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 282 [2023-08-23 22:41:07,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 106.81818181818181) internal successors, (1175), 11 states have internal predecessors, (1175), 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 22:41:07,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:07,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 282 [2023-08-23 22:41:07,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:08,330 INFO L124 PetriNetUnfolderBase]: 844/1612 cut-off events. [2023-08-23 22:41:08,330 INFO L125 PetriNetUnfolderBase]: For 1177/1177 co-relation queries the response was YES. [2023-08-23 22:41:08,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4119 conditions, 1612 events. 844/1612 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7869 event pairs, 249 based on Foata normal form. 0/1590 useless extension candidates. Maximal degree in co-relation 2456. Up to 886 conditions per place. [2023-08-23 22:41:08,339 INFO L140 encePairwiseOnDemand]: 272/282 looper letters, 89 selfloop transitions, 11 changer transitions 13/122 dead transitions. [2023-08-23 22:41:08,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 717 flow [2023-08-23 22:41:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-23 22:41:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-23 22:41:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1046 transitions. [2023-08-23 22:41:08,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41213553979511425 [2023-08-23 22:41:08,343 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1046 transitions. [2023-08-23 22:41:08,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1046 transitions. [2023-08-23 22:41:08,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:08,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1046 transitions. [2023-08-23 22:41:08,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.22222222222223) internal successors, (1046), 9 states have internal predecessors, (1046), 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 22:41:08,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 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 22:41:08,352 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 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 22:41:08,352 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1046 transitions. [2023-08-23 22:41:08,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 717 flow [2023-08-23 22:41:08,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 122 transitions, 677 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-23 22:41:08,358 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 310 flow [2023-08-23 22:41:08,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-23 22:41:08,361 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-08-23 22:41:08,361 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 310 flow [2023-08-23 22:41:08,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.81818181818181) internal successors, (1175), 11 states have internal predecessors, (1175), 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 22:41:08,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:08,362 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 22:41:08,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:41:08,362 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 22:41:08,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash 858373001, now seen corresponding path program 2 times [2023-08-23 22:41:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:08,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081877905] [2023-08-23 22:41:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:09,048 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 22:41:09,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081877905] [2023-08-23 22:41:09,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081877905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:09,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:09,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-23 22:41:09,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022068050] [2023-08-23 22:41:09,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:09,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-23 22:41:09,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:09,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-23 22:41:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-23 22:41:09,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 282 [2023-08-23 22:41:09,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 310 flow. Second operand has 11 states, 11 states have (on average 106.81818181818181) internal successors, (1175), 11 states have internal predecessors, (1175), 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 22:41:09,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:09,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 282 [2023-08-23 22:41:09,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:09,754 INFO L124 PetriNetUnfolderBase]: 1096/2088 cut-off events. [2023-08-23 22:41:09,755 INFO L125 PetriNetUnfolderBase]: For 1260/1260 co-relation queries the response was YES. [2023-08-23 22:41:09,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 2088 events. 1096/2088 cut-off events. For 1260/1260 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10771 event pairs, 301 based on Foata normal form. 0/2061 useless extension candidates. Maximal degree in co-relation 3995. Up to 839 conditions per place. [2023-08-23 22:41:09,768 INFO L140 encePairwiseOnDemand]: 273/282 looper letters, 89 selfloop transitions, 16 changer transitions 13/127 dead transitions. [2023-08-23 22:41:09,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 784 flow [2023-08-23 22:41:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-23 22:41:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-23 22:41:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1046 transitions. [2023-08-23 22:41:09,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41213553979511425 [2023-08-23 22:41:09,771 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1046 transitions. [2023-08-23 22:41:09,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1046 transitions. [2023-08-23 22:41:09,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:09,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1046 transitions. [2023-08-23 22:41:09,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.22222222222223) internal successors, (1046), 9 states have internal predecessors, (1046), 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 22:41:09,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 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 22:41:09,777 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 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 22:41:09,778 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 310 flow. Second operand 9 states and 1046 transitions. [2023-08-23 22:41:09,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 784 flow [2023-08-23 22:41:09,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:41:09,785 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 406 flow [2023-08-23 22:41:09,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-08-23 22:41:09,786 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2023-08-23 22:41:09,786 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 406 flow [2023-08-23 22:41:09,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.81818181818181) internal successors, (1175), 11 states have internal predecessors, (1175), 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 22:41:09,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:09,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:09,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 22:41:09,787 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:41:09,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2064601814, now seen corresponding path program 1 times [2023-08-23 22:41:09,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:09,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516346889] [2023-08-23 22:41:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:09,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:09,904 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 22:41:09,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:09,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516346889] [2023-08-23 22:41:09,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516346889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:09,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835662635] [2023-08-23 22:41:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:09,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:09,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:09,907 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 22:41:09,939 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 22:41:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:10,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-23 22:41:10,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:41:10,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-23 22:41:10,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835662635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:10,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-23 22:41:10,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-23 22:41:10,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279658873] [2023-08-23 22:41:10,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:10,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 22:41:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 22:41:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-23 22:41:10,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 282 [2023-08-23 22:41:10,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 126.83333333333333) internal successors, (761), 6 states have internal predecessors, (761), 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 22:41:10,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:10,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 282 [2023-08-23 22:41:10,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:10,370 INFO L124 PetriNetUnfolderBase]: 1190/2211 cut-off events. [2023-08-23 22:41:10,370 INFO L125 PetriNetUnfolderBase]: For 1999/1999 co-relation queries the response was YES. [2023-08-23 22:41:10,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 2211 events. 1190/2211 cut-off events. For 1999/1999 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10876 event pairs, 493 based on Foata normal form. 34/2225 useless extension candidates. Maximal degree in co-relation 4719. Up to 933 conditions per place. [2023-08-23 22:41:10,384 INFO L140 encePairwiseOnDemand]: 274/282 looper letters, 101 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2023-08-23 22:41:10,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 862 flow [2023-08-23 22:41:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:41:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:41:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 822 transitions. [2023-08-23 22:41:10,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858156028368794 [2023-08-23 22:41:10,387 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 822 transitions. [2023-08-23 22:41:10,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 822 transitions. [2023-08-23 22:41:10,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:10,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 822 transitions. [2023-08-23 22:41:10,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 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 22:41:10,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 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 22:41:10,392 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 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 22:41:10,392 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 406 flow. Second operand 6 states and 822 transitions. [2023-08-23 22:41:10,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 862 flow [2023-08-23 22:41:10,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 834 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-23 22:41:10,401 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 507 flow [2023-08-23 22:41:10,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-08-23 22:41:10,402 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-08-23 22:41:10,402 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 507 flow [2023-08-23 22:41:10,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.83333333333333) internal successors, (761), 6 states have internal predecessors, (761), 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 22:41:10,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:10,403 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 22:41:10,411 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 22:41:10,608 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,SelfDestructingSolverStorable7 [2023-08-23 22:41:10,609 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 22:41:10,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1688431302, now seen corresponding path program 2 times [2023-08-23 22:41:10,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:10,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411453330] [2023-08-23 22:41:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:10,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:10,804 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 22:41:10,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:10,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411453330] [2023-08-23 22:41:10,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411453330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:10,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208351814] [2023-08-23 22:41:10,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:41:10,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:10,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:10,806 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 22:41:10,806 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 22:41:10,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:41:10,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:10,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-23 22:41:10,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:11,030 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 22:41:11,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:11,125 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 22:41:11,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208351814] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:11,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:11,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-08-23 22:41:11,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870539317] [2023-08-23 22:41:11,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:11,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-23 22:41:11,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-23 22:41:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-08-23 22:41:11,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 282 [2023-08-23 22:41:11,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 507 flow. Second operand has 20 states, 20 states have (on average 123.3) internal successors, (2466), 20 states have internal predecessors, (2466), 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 22:41:11,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:11,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 282 [2023-08-23 22:41:11,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:11,800 INFO L124 PetriNetUnfolderBase]: 1638/3035 cut-off events. [2023-08-23 22:41:11,800 INFO L125 PetriNetUnfolderBase]: For 3963/3963 co-relation queries the response was YES. [2023-08-23 22:41:11,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9050 conditions, 3035 events. 1638/3035 cut-off events. For 3963/3963 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 14014 event pairs, 352 based on Foata normal form. 32/3047 useless extension candidates. Maximal degree in co-relation 7670. Up to 936 conditions per place. [2023-08-23 22:41:11,822 INFO L140 encePairwiseOnDemand]: 274/282 looper letters, 214 selfloop transitions, 45 changer transitions 6/265 dead transitions. [2023-08-23 22:41:11,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 265 transitions, 1820 flow [2023-08-23 22:41:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-23 22:41:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-23 22:41:11,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2760 transitions. [2023-08-23 22:41:11,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46605876393110435 [2023-08-23 22:41:11,829 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2760 transitions. [2023-08-23 22:41:11,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2760 transitions. [2023-08-23 22:41:11,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:11,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2760 transitions. [2023-08-23 22:41:11,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 131.42857142857142) internal successors, (2760), 21 states have internal predecessors, (2760), 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 22:41:11,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 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 22:41:11,844 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 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 22:41:11,845 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 507 flow. Second operand 21 states and 2760 transitions. [2023-08-23 22:41:11,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 265 transitions, 1820 flow [2023-08-23 22:41:11,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 265 transitions, 1816 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-23 22:41:11,860 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 888 flow [2023-08-23 22:41:11,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=888, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2023-08-23 22:41:11,861 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2023-08-23 22:41:11,861 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 888 flow [2023-08-23 22:41:11,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 123.3) internal successors, (2466), 20 states have internal predecessors, (2466), 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 22:41:11,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:11,863 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 22:41:11,868 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 22:41:12,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:12,068 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 22:41:12,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:12,069 INFO L85 PathProgramCache]: Analyzing trace with hash 878136134, now seen corresponding path program 3 times [2023-08-23 22:41:12,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:12,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873802337] [2023-08-23 22:41:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:12,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:12,638 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 22:41:12,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:12,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873802337] [2023-08-23 22:41:12,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873802337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:12,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:12,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-23 22:41:12,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57102276] [2023-08-23 22:41:12,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:12,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 22:41:12,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:12,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 22:41:12,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-23 22:41:12,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-08-23 22:41:12,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 888 flow. Second operand has 15 states, 15 states have (on average 90.86666666666666) internal successors, (1363), 15 states have internal predecessors, (1363), 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 22:41:12,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:12,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-08-23 22:41:12,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:14,412 INFO L124 PetriNetUnfolderBase]: 2736/5048 cut-off events. [2023-08-23 22:41:14,412 INFO L125 PetriNetUnfolderBase]: For 10240/10240 co-relation queries the response was YES. [2023-08-23 22:41:14,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17212 conditions, 5048 events. 2736/5048 cut-off events. For 10240/10240 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 26377 event pairs, 757 based on Foata normal form. 0/5023 useless extension candidates. Maximal degree in co-relation 15582. Up to 1610 conditions per place. [2023-08-23 22:41:14,450 INFO L140 encePairwiseOnDemand]: 264/282 looper letters, 162 selfloop transitions, 131 changer transitions 4/297 dead transitions. [2023-08-23 22:41:14,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 297 transitions, 2729 flow [2023-08-23 22:41:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-23 22:41:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-23 22:41:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2566 transitions. [2023-08-23 22:41:14,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33701076963488313 [2023-08-23 22:41:14,462 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2566 transitions. [2023-08-23 22:41:14,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2566 transitions. [2023-08-23 22:41:14,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:14,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2566 transitions. [2023-08-23 22:41:14,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 95.03703703703704) internal successors, (2566), 27 states have internal predecessors, (2566), 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 22:41:14,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 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 22:41:14,487 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 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 22:41:14,487 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 888 flow. Second operand 27 states and 2566 transitions. [2023-08-23 22:41:14,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 297 transitions, 2729 flow [2023-08-23 22:41:14,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 297 transitions, 2503 flow, removed 78 selfloop flow, removed 8 redundant places. [2023-08-23 22:41:14,534 INFO L231 Difference]: Finished difference. Result has 135 places, 191 transitions, 1927 flow [2023-08-23 22:41:14,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1927, PETRI_PLACES=135, PETRI_TRANSITIONS=191} [2023-08-23 22:41:14,535 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2023-08-23 22:41:14,535 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 191 transitions, 1927 flow [2023-08-23 22:41:14,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 90.86666666666666) internal successors, (1363), 15 states have internal predecessors, (1363), 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 22:41:14,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:14,536 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 22:41:14,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-23 22:41:14,536 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 22:41:14,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash -7541718, now seen corresponding path program 4 times [2023-08-23 22:41:14,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:14,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001991427] [2023-08-23 22:41:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:15,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:15,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001991427] [2023-08-23 22:41:15,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001991427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:15,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231329033] [2023-08-23 22:41:15,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:41:15,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:15,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:15,238 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 22:41:15,253 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 22:41:15,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:41:15,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:15,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-23 22:41:15,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:15,410 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-23 22:41:15,411 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 22:41:15,738 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 22:41:15,792 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 22:41:16,119 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 22:41:16,176 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 22:41:16,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:16,614 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:41:16,614 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 22:41:16,623 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:41:16,624 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 22:41:16,632 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 22:41:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:16,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231329033] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:16,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:16,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 44 [2023-08-23 22:41:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068581109] [2023-08-23 22:41:16,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:16,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-23 22:41:16,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:16,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-23 22:41:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1898, Unknown=6, NotChecked=0, Total=2070 [2023-08-23 22:41:16,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-23 22:41:16,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 191 transitions, 1927 flow. Second operand has 46 states, 46 states have (on average 86.82608695652173) internal successors, (3994), 46 states have internal predecessors, (3994), 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 22:41:16,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:16,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-23 22:41:16,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:23,241 INFO L124 PetriNetUnfolderBase]: 3432/6372 cut-off events. [2023-08-23 22:41:23,241 INFO L125 PetriNetUnfolderBase]: For 15992/15992 co-relation queries the response was YES. [2023-08-23 22:41:23,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23527 conditions, 6372 events. 3432/6372 cut-off events. For 15992/15992 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 35771 event pairs, 544 based on Foata normal form. 54/6389 useless extension candidates. Maximal degree in co-relation 19378. Up to 1562 conditions per place. [2023-08-23 22:41:23,293 INFO L140 encePairwiseOnDemand]: 264/282 looper letters, 277 selfloop transitions, 247 changer transitions 15/539 dead transitions. [2023-08-23 22:41:23,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 539 transitions, 4788 flow [2023-08-23 22:41:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-23 22:41:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-23 22:41:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5551 transitions. [2023-08-23 22:41:23,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32269503546099293 [2023-08-23 22:41:23,303 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5551 transitions. [2023-08-23 22:41:23,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5551 transitions. [2023-08-23 22:41:23,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:23,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5551 transitions. [2023-08-23 22:41:23,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 91.0) internal successors, (5551), 61 states have internal predecessors, (5551), 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 22:41:23,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 282.0) internal successors, (17484), 62 states have internal predecessors, (17484), 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 22:41:23,343 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 282.0) internal successors, (17484), 62 states have internal predecessors, (17484), 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 22:41:23,343 INFO L175 Difference]: Start difference. First operand has 135 places, 191 transitions, 1927 flow. Second operand 61 states and 5551 transitions. [2023-08-23 22:41:23,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 539 transitions, 4788 flow [2023-08-23 22:41:23,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 539 transitions, 4567 flow, removed 60 selfloop flow, removed 6 redundant places. [2023-08-23 22:41:23,439 INFO L231 Difference]: Finished difference. Result has 200 places, 293 transitions, 3436 flow [2023-08-23 22:41:23,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=3436, PETRI_PLACES=200, PETRI_TRANSITIONS=293} [2023-08-23 22:41:23,440 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 166 predicate places. [2023-08-23 22:41:23,440 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 293 transitions, 3436 flow [2023-08-23 22:41:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 86.82608695652173) internal successors, (3994), 46 states have internal predecessors, (3994), 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 22:41:23,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:23,441 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 22:41:23,447 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 22:41:23,646 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 22:41:23,647 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 22:41:23,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash 366211873, now seen corresponding path program 1 times [2023-08-23 22:41:23,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:23,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175351420] [2023-08-23 22:41:23,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:23,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:24,930 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 22:41:24,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:24,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175351420] [2023-08-23 22:41:24,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175351420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:24,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54201955] [2023-08-23 22:41:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:24,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:24,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:24,932 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 22:41:24,934 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 22:41:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:25,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-23 22:41:25,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:25,253 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 22:41:25,563 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 30 [2023-08-23 22:41:32,378 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-23 22:41:32,378 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 82 treesize of output 35 [2023-08-23 22:41:32,452 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 22:41:32,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:34,848 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 22:41:35,242 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 22:41:35,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54201955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:35,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:35,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 64 [2023-08-23 22:41:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140755251] [2023-08-23 22:41:35,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:35,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-23 22:41:35,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:35,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-23 22:41:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=3924, Unknown=3, NotChecked=0, Total=4290 [2023-08-23 22:41:35,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-08-23 22:41:35,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 293 transitions, 3436 flow. Second operand has 66 states, 66 states have (on average 90.63636363636364) internal successors, (5982), 66 states have internal predecessors, (5982), 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 22:41:35,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:35,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-08-23 22:41:35,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:59,191 WARN L234 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 93 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:42:05,385 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 22:42:07,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:42:19,940 WARN L539 Checker$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 22:42:23,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:42:47,600 WARN L539 Checker$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 22:42:49,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:42:51,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:42:54,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:42:56,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:42:58,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:43:27,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:43:29,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:43:31,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:43:33,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:43:35,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:43:40,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:43:42,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:43:49,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:43:55,075 WARN L539 Checker$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 22:43:56,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:44:05,510 WARN L539 Checker$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 22:44:07,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:44:10,401 WARN L539 Checker$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 22:44:13,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:44:15,451 WARN L539 Checker$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 22:44:16,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:44:23,029 INFO L124 PetriNetUnfolderBase]: 6430/12006 cut-off events. [2023-08-23 22:44:23,029 INFO L125 PetriNetUnfolderBase]: For 35166/35166 co-relation queries the response was YES. [2023-08-23 22:44:23,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47164 conditions, 12006 events. 6430/12006 cut-off events. For 35166/35166 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 76669 event pairs, 1490 based on Foata normal form. 68/12015 useless extension candidates. Maximal degree in co-relation 39959. Up to 4370 conditions per place. [2023-08-23 22:44:23,111 INFO L140 encePairwiseOnDemand]: 263/282 looper letters, 642 selfloop transitions, 420 changer transitions 214/1276 dead transitions. [2023-08-23 22:44:23,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1276 transitions, 11839 flow [2023-08-23 22:44:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2023-08-23 22:44:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2023-08-23 22:44:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 15674 transitions. [2023-08-23 22:44:23,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3348286764077587 [2023-08-23 22:44:23,132 INFO L72 ComplementDD]: Start complementDD. Operand 166 states and 15674 transitions. [2023-08-23 22:44:23,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 166 states and 15674 transitions. [2023-08-23 22:44:23,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:44:23,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 166 states and 15674 transitions. [2023-08-23 22:44:23,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 167 states, 166 states have (on average 94.42168674698796) internal successors, (15674), 166 states have internal predecessors, (15674), 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 22:44:23,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 167 states, 167 states have (on average 282.0) internal successors, (47094), 167 states have internal predecessors, (47094), 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 22:44:23,217 INFO L81 ComplementDD]: Finished complementDD. Result has 167 states, 167 states have (on average 282.0) internal successors, (47094), 167 states have internal predecessors, (47094), 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 22:44:23,217 INFO L175 Difference]: Start difference. First operand has 200 places, 293 transitions, 3436 flow. Second operand 166 states and 15674 transitions. [2023-08-23 22:44:23,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1276 transitions, 11839 flow [2023-08-23 22:44:23,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1276 transitions, 10912 flow, removed 363 selfloop flow, removed 12 redundant places. [2023-08-23 22:44:23,529 INFO L231 Difference]: Finished difference. Result has 379 places, 634 transitions, 7576 flow [2023-08-23 22:44:23,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=166, PETRI_FLOW=7576, PETRI_PLACES=379, PETRI_TRANSITIONS=634} [2023-08-23 22:44:23,530 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 345 predicate places. [2023-08-23 22:44:23,530 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 634 transitions, 7576 flow [2023-08-23 22:44:23,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 90.63636363636364) internal successors, (5982), 66 states have internal predecessors, (5982), 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 22:44:23,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:44:23,531 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 22:44:23,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-23 22:44:23,738 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 22:44:23,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:44:23,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:44:23,739 INFO L85 PathProgramCache]: Analyzing trace with hash -765198685, now seen corresponding path program 2 times [2023-08-23 22:44:23,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:44:23,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846356242] [2023-08-23 22:44:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:44:23,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:44:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:44:25,079 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 22:44:25,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:44:25,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846356242] [2023-08-23 22:44:25,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846356242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:44:25,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482198257] [2023-08-23 22:44:25,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:44:25,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:44:25,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:44:25,085 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 22:44:25,089 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 22:44:25,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:44:25,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:44:25,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 95 conjunts are in the unsatisfiable core [2023-08-23 22:44:25,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:44:25,401 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-23 22:44:25,401 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 22:44:25,569 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 22:44:25,618 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 22:44:25,918 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-23 22:44:25,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 30 treesize of output 33 [2023-08-23 22:44:26,466 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 22:44:26,524 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 22:44:26,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:44:27,340 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:44:27,340 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 22:44:27,349 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:44:27,350 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 22:44:27,355 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 22:44:27,578 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 22:44:27,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482198257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:44:27,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:44:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 57 [2023-08-23 22:44:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568794894] [2023-08-23 22:44:27,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:44:27,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-23 22:44:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:44:27,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-23 22:44:27,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3210, Unknown=6, NotChecked=0, Total=3422 [2023-08-23 22:44:27,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-23 22:44:27,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 634 transitions, 7576 flow. Second operand has 59 states, 59 states have (on average 86.76271186440678) internal successors, (5119), 59 states have internal predecessors, (5119), 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 22:44:27,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:44:27,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-23 22:44:27,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:45:11,715 INFO L124 PetriNetUnfolderBase]: 11003/20687 cut-off events. [2023-08-23 22:45:11,715 INFO L125 PetriNetUnfolderBase]: For 75615/75615 co-relation queries the response was YES. [2023-08-23 22:45:11,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84562 conditions, 20687 events. 11003/20687 cut-off events. For 75615/75615 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 145146 event pairs, 1272 based on Foata normal form. 268/20860 useless extension candidates. Maximal degree in co-relation 82805. Up to 3749 conditions per place. [2023-08-23 22:45:11,938 INFO L140 encePairwiseOnDemand]: 258/282 looper letters, 573 selfloop transitions, 1167 changer transitions 115/1855 dead transitions. [2023-08-23 22:45:11,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 1855 transitions, 20789 flow [2023-08-23 22:45:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2023-08-23 22:45:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2023-08-23 22:45:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 15588 transitions. [2023-08-23 22:45:11,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.319517894477924 [2023-08-23 22:45:11,963 INFO L72 ComplementDD]: Start complementDD. Operand 173 states and 15588 transitions. [2023-08-23 22:45:11,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 173 states and 15588 transitions. [2023-08-23 22:45:11,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:45:11,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 173 states and 15588 transitions. [2023-08-23 22:45:11,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 174 states, 173 states have (on average 90.10404624277457) internal successors, (15588), 173 states have internal predecessors, (15588), 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 22:45:12,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 174 states, 174 states have (on average 282.0) internal successors, (49068), 174 states have internal predecessors, (49068), 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 22:45:12,042 INFO L81 ComplementDD]: Finished complementDD. Result has 174 states, 174 states have (on average 282.0) internal successors, (49068), 174 states have internal predecessors, (49068), 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 22:45:12,042 INFO L175 Difference]: Start difference. First operand has 379 places, 634 transitions, 7576 flow. Second operand 173 states and 15588 transitions. [2023-08-23 22:45:12,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 1855 transitions, 20789 flow [2023-08-23 22:45:12,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1855 transitions, 19943 flow, removed 333 selfloop flow, removed 16 redundant places. [2023-08-23 22:45:12,879 INFO L231 Difference]: Finished difference. Result has 531 places, 1270 transitions, 17304 flow [2023-08-23 22:45:12,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=173, PETRI_FLOW=17304, PETRI_PLACES=531, PETRI_TRANSITIONS=1270} [2023-08-23 22:45:12,880 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 497 predicate places. [2023-08-23 22:45:12,880 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1270 transitions, 17304 flow [2023-08-23 22:45:12,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 86.76271186440678) internal successors, (5119), 59 states have internal predecessors, (5119), 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 22:45:12,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:45:12,881 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 22:45:12,886 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 22:45:13,082 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 22:45:13,082 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:45:13,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:45:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash -395420042, now seen corresponding path program 2 times [2023-08-23 22:45:13,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:45:13,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999202315] [2023-08-23 22:45:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:45:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:45:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:45:13,317 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 22:45:13,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:45:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999202315] [2023-08-23 22:45:13,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999202315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:45:13,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379415693] [2023-08-23 22:45:13,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:45:13,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:45:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:45:13,321 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 22:45:13,324 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 22:45:13,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:45:13,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:45:13,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-23 22:45:13,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:45:13,536 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 22:45:13,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:45:13,664 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 22:45:13,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379415693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:45:13,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:45:13,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-08-23 22:45:13,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522667745] [2023-08-23 22:45:13,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:45:13,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-23 22:45:13,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:45:13,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-23 22:45:13,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-23 22:45:13,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 282 [2023-08-23 22:45:13,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1270 transitions, 17304 flow. Second operand has 22 states, 22 states have (on average 122.04545454545455) internal successors, (2685), 22 states have internal predecessors, (2685), 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 22:45:13,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:45:13,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 282 [2023-08-23 22:45:13,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:45:20,886 INFO L124 PetriNetUnfolderBase]: 11876/22473 cut-off events. [2023-08-23 22:45:20,887 INFO L125 PetriNetUnfolderBase]: For 111585/111585 co-relation queries the response was YES. [2023-08-23 22:45:21,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111684 conditions, 22473 events. 11876/22473 cut-off events. For 111585/111585 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 160638 event pairs, 3272 based on Foata normal form. 116/22558 useless extension candidates. Maximal degree in co-relation 110065. Up to 8295 conditions per place. [2023-08-23 22:45:21,290 INFO L140 encePairwiseOnDemand]: 272/282 looper letters, 967 selfloop transitions, 757 changer transitions 12/1736 dead transitions. [2023-08-23 22:45:21,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1736 transitions, 26082 flow [2023-08-23 22:45:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-23 22:45:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-23 22:45:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3429 transitions. [2023-08-23 22:45:21,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450354609929078 [2023-08-23 22:45:21,296 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3429 transitions. [2023-08-23 22:45:21,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3429 transitions. [2023-08-23 22:45:21,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:45:21,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3429 transitions. [2023-08-23 22:45:21,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 127.0) internal successors, (3429), 27 states have internal predecessors, (3429), 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 22:45:21,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 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 22:45:21,310 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 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 22:45:21,310 INFO L175 Difference]: Start difference. First operand has 531 places, 1270 transitions, 17304 flow. Second operand 27 states and 3429 transitions. [2023-08-23 22:45:21,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1736 transitions, 26082 flow [2023-08-23 22:45:22,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 1736 transitions, 24302 flow, removed 767 selfloop flow, removed 21 redundant places. [2023-08-23 22:45:22,763 INFO L231 Difference]: Finished difference. Result has 538 places, 1357 transitions, 19769 flow [2023-08-23 22:45:22,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=15390, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=19769, PETRI_PLACES=538, PETRI_TRANSITIONS=1357} [2023-08-23 22:45:22,764 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 504 predicate places. [2023-08-23 22:45:22,765 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1357 transitions, 19769 flow [2023-08-23 22:45:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 122.04545454545455) internal successors, (2685), 22 states have internal predecessors, (2685), 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 22:45:22,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:45:22,765 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:45:22,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-23 22:45:22,970 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 22:45:22,970 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 22:45:22,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:45:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1225616750, now seen corresponding path program 3 times [2023-08-23 22:45:22,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:45:22,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087446952] [2023-08-23 22:45:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:45:22,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:45:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:45:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:45:24,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:45:24,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087446952] [2023-08-23 22:45:24,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087446952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:45:24,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238360932] [2023-08-23 22:45:24,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:45:24,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:45:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:45:24,383 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 22:45:24,385 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 22:45:24,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-23 22:45:24,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:45:24,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-23 22:45:24,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:45:24,696 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-23 22:45:24,697 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 22:45:25,110 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 22:45:25,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:45:25,550 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 22:45:25,629 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 22:45:26,102 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 22:45:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:45:26,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:45:26,605 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_657 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_657) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset| (- 4))) 4294967296)))) is different from false [2023-08-23 22:45:27,893 INFO L322 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-23 22:45:27,894 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 22:45:27,904 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:45:27,904 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 22:45:27,909 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 22:45:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 16 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:45:32,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238360932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:45:32,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:45:32,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 22] total 70 [2023-08-23 22:45:32,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132283431] [2023-08-23 22:45:32,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:45:32,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-08-23 22:45:32,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:45:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-08-23 22:45:32,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=4612, Unknown=30, NotChecked=138, Total=5112 [2023-08-23 22:45:32,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-23 22:45:32,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1357 transitions, 19769 flow. Second operand has 72 states, 72 states have (on average 86.79166666666667) internal successors, (6249), 72 states have internal predecessors, (6249), 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 22:45:32,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:45:32,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-23 22:45:32,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:46:04,341 INFO L124 PetriNetUnfolderBase]: 15223/28786 cut-off events. [2023-08-23 22:46:04,342 INFO L125 PetriNetUnfolderBase]: For 157665/157665 co-relation queries the response was YES. [2023-08-23 22:46:04,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144887 conditions, 28786 events. 15223/28786 cut-off events. For 157665/157665 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 213364 event pairs, 2424 based on Foata normal form. 150/28889 useless extension candidates. Maximal degree in co-relation 143273. Up to 10614 conditions per place. [2023-08-23 22:46:04,826 INFO L140 encePairwiseOnDemand]: 259/282 looper letters, 540 selfloop transitions, 1685 changer transitions 48/2273 dead transitions. [2023-08-23 22:46:04,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 2273 transitions, 33457 flow [2023-08-23 22:46:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2023-08-23 22:46:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2023-08-23 22:46:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 13480 transitions. [2023-08-23 22:46:04,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3186761229314421 [2023-08-23 22:46:04,841 INFO L72 ComplementDD]: Start complementDD. Operand 150 states and 13480 transitions. [2023-08-23 22:46:04,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 13480 transitions. [2023-08-23 22:46:04,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:46:04,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 150 states and 13480 transitions. [2023-08-23 22:46:04,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 151 states, 150 states have (on average 89.86666666666666) internal successors, (13480), 150 states have internal predecessors, (13480), 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 22:46:04,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 151 states, 151 states have (on average 282.0) internal successors, (42582), 151 states have internal predecessors, (42582), 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 22:46:04,899 INFO L81 ComplementDD]: Finished complementDD. Result has 151 states, 151 states have (on average 282.0) internal successors, (42582), 151 states have internal predecessors, (42582), 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 22:46:04,899 INFO L175 Difference]: Start difference. First operand has 538 places, 1357 transitions, 19769 flow. Second operand 150 states and 13480 transitions. [2023-08-23 22:46:04,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 2273 transitions, 33457 flow [2023-08-23 22:46:06,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 2273 transitions, 32061 flow, removed 354 selfloop flow, removed 11 redundant places. [2023-08-23 22:46:06,729 INFO L231 Difference]: Finished difference. Result has 693 places, 1793 transitions, 29021 flow [2023-08-23 22:46:06,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=18519, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=150, PETRI_FLOW=29021, PETRI_PLACES=693, PETRI_TRANSITIONS=1793} [2023-08-23 22:46:06,730 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 659 predicate places. [2023-08-23 22:46:06,730 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 1793 transitions, 29021 flow [2023-08-23 22:46:06,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 86.79166666666667) internal successors, (6249), 72 states have internal predecessors, (6249), 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 22:46:06,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:46:06,731 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 22:46:06,736 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 22:46:06,932 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 22:46:06,932 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:46:06,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:46:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1476584369, now seen corresponding path program 4 times [2023-08-23 22:46:06,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:46:06,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129658000] [2023-08-23 22:46:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:46:06,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:46:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:46:08,526 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 22:46:08,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:46:08,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129658000] [2023-08-23 22:46:08,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129658000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:46:08,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288168965] [2023-08-23 22:46:08,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:46:08,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:46:08,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:46:08,533 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 22:46:08,535 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 22:46:08,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:46:08,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:46:08,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-23 22:46:08,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:46:08,845 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 22:46:09,258 INFO L322 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-23 22:46:09,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 38 treesize of output 41 [2023-08-23 22:46:09,744 INFO L322 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-23 22:46:09,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 51 treesize of output 54 [2023-08-23 22:46:10,938 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-23 22:46:10,938 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 80 treesize of output 35 [2023-08-23 22:46:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:46:11,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:46:26,141 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 22:46:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:46:26,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288168965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:46:26,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:46:26,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 26] total 79 [2023-08-23 22:46:26,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697020598] [2023-08-23 22:46:26,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:46:26,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-08-23 22:46:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:46:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-08-23 22:46:26,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=5944, Unknown=5, NotChecked=0, Total=6480 [2023-08-23 22:46:26,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-08-23 22:46:26,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 1793 transitions, 29021 flow. Second operand has 81 states, 81 states have (on average 90.88888888888889) internal successors, (7362), 81 states have internal predecessors, (7362), 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 22:46:26,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:46:26,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-08-23 22:46:26,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:47:01,587 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 22:47:10,980 WARN L234 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 73 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:47:18,275 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:47:20,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:47:23,252 WARN L539 Checker$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 22:47:25,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:47:27,276 WARN L539 Checker$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 22:47:29,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:47:31,298 WARN L539 Checker$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 22:47:48,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:47:50,550 WARN L539 Checker$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 22:47:52,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:47:54,862 WARN L539 Checker$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 22:48:05,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:48:06,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:48:18,773 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-23 22:48:20,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:48:22,796 WARN L539 Checker$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 22:48:24,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:48:26,936 WARN L539 Checker$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 22:48:29,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:48:31,972 WARN L539 Checker$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 22:48:33,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:48:35,999 WARN L539 Checker$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 22:48:38,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:48:40,023 WARN L539 Checker$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 22:49:27,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:49:34,509 WARN L539 Checker$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 22:49:43,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:49:44,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-23 22:49:47,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-23 22:49:50,527 WARN L539 Checker$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 22:50:02,525 INFO L124 PetriNetUnfolderBase]: 35379/67023 cut-off events. [2023-08-23 22:50:02,525 INFO L125 PetriNetUnfolderBase]: For 637173/637173 co-relation queries the response was YES. [2023-08-23 22:50:04,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444807 conditions, 67023 events. 35379/67023 cut-off events. For 637173/637173 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 547198 event pairs, 5304 based on Foata normal form. 376/67340 useless extension candidates. Maximal degree in co-relation 432965. Up to 25408 conditions per place. [2023-08-23 22:50:04,571 INFO L140 encePairwiseOnDemand]: 263/282 looper letters, 1937 selfloop transitions, 3045 changer transitions 386/5368 dead transitions. [2023-08-23 22:50:04,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1020 places, 5368 transitions, 90146 flow [2023-08-23 22:50:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 328 states. [2023-08-23 22:50:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2023-08-23 22:50:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 30945 transitions. [2023-08-23 22:50:04,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3345550077841204 [2023-08-23 22:50:04,603 INFO L72 ComplementDD]: Start complementDD. Operand 328 states and 30945 transitions. [2023-08-23 22:50:04,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 328 states and 30945 transitions. [2023-08-23 22:50:04,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:50:04,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 328 states and 30945 transitions. [2023-08-23 22:50:04,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 329 states, 328 states have (on average 94.34451219512195) internal successors, (30945), 328 states have internal predecessors, (30945), 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 22:50:04,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 329 states, 329 states have (on average 282.0) internal successors, (92778), 329 states have internal predecessors, (92778), 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 22:50:04,730 INFO L81 ComplementDD]: Finished complementDD. Result has 329 states, 329 states have (on average 282.0) internal successors, (92778), 329 states have internal predecessors, (92778), 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 22:50:04,730 INFO L175 Difference]: Start difference. First operand has 693 places, 1793 transitions, 29021 flow. Second operand 328 states and 30945 transitions. [2023-08-23 22:50:04,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1020 places, 5368 transitions, 90146 flow [2023-08-23 22:50:12,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 970 places, 5368 transitions, 88181 flow, removed 596 selfloop flow, removed 50 redundant places. [2023-08-23 22:50:12,318 INFO L231 Difference]: Finished difference. Result has 1033 places, 3929 transitions, 73232 flow [2023-08-23 22:50:12,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=27850, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=328, PETRI_FLOW=73232, PETRI_PLACES=1033, PETRI_TRANSITIONS=3929} [2023-08-23 22:50:12,321 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 999 predicate places. [2023-08-23 22:50:12,321 INFO L495 AbstractCegarLoop]: Abstraction has has 1033 places, 3929 transitions, 73232 flow [2023-08-23 22:50:12,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 90.88888888888889) internal successors, (7362), 81 states have internal predecessors, (7362), 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 22:50:12,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:12,322 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 22:50:12,328 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 22:50:12,527 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 22:50:12,527 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:50:12,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash -809020241, now seen corresponding path program 5 times [2023-08-23 22:50:12,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:12,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123041622] [2023-08-23 22:50:12,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:12,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:14,560 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 22:50:14,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123041622] [2023-08-23 22:50:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123041622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:50:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589179287] [2023-08-23 22:50:14,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:50:14,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:50:14,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:50:14,577 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 22:50:14,581 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 22:50:14,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-23 22:50:14,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:50:14,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 121 conjunts are in the unsatisfiable core [2023-08-23 22:50:14,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:50:14,832 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-23 22:50:14,832 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 22:50:15,088 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 22:50:15,148 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 22:50:15,565 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 22:50:15,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:50:15,980 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 22:50:16,926 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 22:50:17,033 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 22:50:17,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:50:18,994 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:50:18,994 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 22:50:19,003 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:50:19,003 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 22:50:19,007 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 22:50:19,263 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 22:50:19,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589179287] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:50:19,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:50:19,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 78 [2023-08-23 22:50:19,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404590044] [2023-08-23 22:50:19,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:50:19,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-08-23 22:50:19,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-08-23 22:50:19,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=6008, Unknown=10, NotChecked=0, Total=6320 [2023-08-23 22:50:19,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-23 22:50:19,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1033 places, 3929 transitions, 73232 flow. Second operand has 80 states, 80 states have (on average 86.875) internal successors, (6950), 80 states have internal predecessors, (6950), 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 22:50:19,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:19,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-23 22:50:19,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:52:55,270 INFO L124 PetriNetUnfolderBase]: 50664/96649 cut-off events. [2023-08-23 22:52:55,271 INFO L125 PetriNetUnfolderBase]: For 1095957/1095957 co-relation queries the response was YES. [2023-08-23 22:52:59,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679032 conditions, 96649 events. 50664/96649 cut-off events. For 1095957/1095957 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 834416 event pairs, 5949 based on Foata normal form. 876/97437 useless extension candidates. Maximal degree in co-relation 675392. Up to 37059 conditions per place. [2023-08-23 22:52:59,868 INFO L140 encePairwiseOnDemand]: 262/282 looper letters, 1036 selfloop transitions, 5491 changer transitions 163/6690 dead transitions. [2023-08-23 22:52:59,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1160 places, 6690 transitions, 127883 flow [2023-08-23 22:52:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2023-08-23 22:52:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2023-08-23 22:52:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 24720 transitions. [2023-08-23 22:52:59,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3187620889748549 [2023-08-23 22:52:59,889 INFO L72 ComplementDD]: Start complementDD. Operand 275 states and 24720 transitions. [2023-08-23 22:52:59,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 275 states and 24720 transitions. [2023-08-23 22:52:59,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:52:59,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 275 states and 24720 transitions. [2023-08-23 22:52:59,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 276 states, 275 states have (on average 89.89090909090909) internal successors, (24720), 275 states have internal predecessors, (24720), 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 22:52:59,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 276 states, 276 states have (on average 282.0) internal successors, (77832), 276 states have internal predecessors, (77832), 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 22:52:59,980 INFO L81 ComplementDD]: Finished complementDD. Result has 276 states, 276 states have (on average 282.0) internal successors, (77832), 276 states have internal predecessors, (77832), 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 22:52:59,980 INFO L175 Difference]: Start difference. First operand has 1033 places, 3929 transitions, 73232 flow. Second operand 275 states and 24720 transitions. [2023-08-23 22:52:59,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1160 places, 6690 transitions, 127883 flow [2023-08-23 22:53:20,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1122 places, 6690 transitions, 124595 flow, removed 1539 selfloop flow, removed 38 redundant places. [2023-08-23 22:53:20,638 INFO L231 Difference]: Finished difference. Result has 1159 places, 5695 transitions, 116014 flow [2023-08-23 22:53:20,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=59241, PETRI_DIFFERENCE_MINUEND_PLACES=848, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=275, PETRI_FLOW=116014, PETRI_PLACES=1159, PETRI_TRANSITIONS=5695} [2023-08-23 22:53:20,641 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1125 predicate places. [2023-08-23 22:53:20,642 INFO L495 AbstractCegarLoop]: Abstraction has has 1159 places, 5695 transitions, 116014 flow [2023-08-23 22:53:20,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 86.875) internal successors, (6950), 80 states have internal predecessors, (6950), 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 22:53:20,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:53:20,643 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 22:53:20,651 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 22:53:20,847 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 22:53:20,848 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:53:20,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:53:20,848 INFO L85 PathProgramCache]: Analyzing trace with hash -912492965, now seen corresponding path program 6 times [2023-08-23 22:53:20,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:53:20,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372529000] [2023-08-23 22:53:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:53:20,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:53:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:53:22,931 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 22:53:22,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:53:22,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372529000] [2023-08-23 22:53:22,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372529000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:53:22,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368954584] [2023-08-23 22:53:22,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-23 22:53:22,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:53:22,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:53:22,932 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 22:53:22,934 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 22:53:23,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-23 22:53:23,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:53:23,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 109 conjunts are in the unsatisfiable core [2023-08-23 22:53:23,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:53:23,163 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-23 22:53:23,163 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 22:53:23,387 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 22:53:23,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-23 22:53:23,730 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 22:53:23,799 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 22:53:24,122 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-23 22:53:24,122 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 30 treesize of output 33 [2023-08-23 22:53:24,827 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 22:53:24,889 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 22:53:24,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:53:25,960 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_930 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_930) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset| (- 4))) 4294967296)))) is different from false [2023-08-23 22:53:29,408 INFO L322 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-23 22:53:29,409 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 22:53:29,420 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-23 22:53:29,420 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 22:53:29,425 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 22:53:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:53:33,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368954584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:53:33,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:53:33,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 27] total 84 [2023-08-23 22:53:33,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863778842] [2023-08-23 22:53:33,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:53:33,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-08-23 22:53:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:53:33,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-08-23 22:53:33,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=6631, Unknown=58, NotChecked=166, Total=7310 [2023-08-23 22:53:33,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-23 22:53:33,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1159 places, 5695 transitions, 116014 flow. Second operand has 86 states, 86 states have (on average 86.77906976744185) internal successors, (7463), 86 states have internal predecessors, (7463), 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 22:53:33,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:53:33,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-23 22:53:33,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-23 22:54:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-23 22:54:10,047 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-23 22:54:10,053 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 22:54:10,058 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-23 22:54:10,058 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 22:54:10,248 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 22:54:10,248 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 140 known predicates. [2023-08-23 22:54:10,249 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-23 22:54:10,250 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-23 22:54:10,250 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-23 22:54:10,250 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-23 22:54:10,250 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-23 22:54:10,250 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 1, 1, 1, 1] [2023-08-23 22:54:10,254 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-23 22:54:10,254 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-23 22:54:10,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.08 10:54:10 BasicIcfg [2023-08-23 22:54:10,256 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-23 22:54:10,256 INFO L158 Benchmark]: Toolchain (without parser) took 790868.43ms. Allocated memory was 369.1MB in the beginning and 9.4GB in the end (delta: 9.0GB). Free memory was 344.1MB in the beginning and 5.1GB in the end (delta: -4.7GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. [2023-08-23 22:54:10,256 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 369.1MB. Free memory is still 346.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 22:54:10,257 INFO L158 Benchmark]: CACSL2BoogieTranslator took 654.62ms. Allocated memory is still 369.1MB. Free memory was 344.1MB in the beginning and 314.7MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-23 22:54:10,257 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.14ms. Allocated memory is still 369.1MB. Free memory was 314.7MB in the beginning and 311.9MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:54:10,257 INFO L158 Benchmark]: Boogie Preprocessor took 32.75ms. Allocated memory is still 369.1MB. Free memory was 311.9MB in the beginning and 310.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:54:10,257 INFO L158 Benchmark]: RCFGBuilder took 542.86ms. Allocated memory is still 369.1MB. Free memory was 310.2MB in the beginning and 292.7MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-23 22:54:10,257 INFO L158 Benchmark]: TraceAbstraction took 789539.22ms. Allocated memory was 369.1MB in the beginning and 9.4GB in the end (delta: 9.0GB). Free memory was 345.9MB in the beginning and 5.1GB in the end (delta: -4.7GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. [2023-08-23 22:54:10,258 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 369.1MB. Free memory is still 346.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 654.62ms. Allocated memory is still 369.1MB. Free memory was 344.1MB in the beginning and 314.7MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 62.14ms. Allocated memory is still 369.1MB. Free memory was 314.7MB in the beginning and 311.9MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.75ms. Allocated memory is still 369.1MB. Free memory was 311.9MB in the beginning and 310.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 542.86ms. Allocated memory is still 369.1MB. Free memory was 310.2MB in the beginning and 292.7MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 789539.22ms. Allocated memory was 369.1MB in the beginning and 9.4GB in the end (delta: 9.0GB). Free memory was 345.9MB in the beginning and 5.1GB in the end (delta: -4.7GB). Peak memory consumption was 4.2GB. 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: 3.5s, 137 PlacesBefore, 34 PlacesAfterwards, 140 TransitionsBefore, 32 TransitionsAfterwards, 6492 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 74 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 26 ConcurrentYvCompositions, 5 ChoiceCompositions, 131 TotalNumberOfCompositions, 8978 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6450, independent: 6265, independent conditional: 0, independent unconditional: 6265, dependent: 185, dependent conditional: 0, dependent unconditional: 185, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3562, independent: 3515, independent conditional: 0, independent unconditional: 3515, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6450, independent: 2750, independent conditional: 0, independent unconditional: 2750, dependent: 138, dependent conditional: 0, dependent unconditional: 138, unknown: 3562, unknown conditional: 0, unknown unconditional: 3562] , Statistics on independence cache: Total cache size (in pairs): 142, Positive cache size: 127, Positive conditional cache size: 0, Positive unconditional cache size: 127, 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 PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 140 known predicates. - TimeoutResultAtElement [Line: 1021]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 140 known predicates. - 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 PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 140 known predicates. - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 140 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 236 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: 789.4s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 712.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 843 mSolverCounterUnknown, 15302 SdHoareTripleChecker+Valid, 203.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15302 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 195.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 897 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 1754 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 92954 IncrementalHoareTripleChecker+Invalid, 96448 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1754 mSolverCounterUnsat, 3 mSDtfsCounter, 92954 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2272 GetRequests, 429 SyntacticMatches, 40 SemanticMatches, 1802 ConstructedPredicates, 2 IntricatePredicates, 5 DeprecatedPredicates, 165099 ImplicationChecksByTransitivity, 384.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116014occurred in iteration=17, InterpolantAutomatonStates: 1276, 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, 1.3s SatisfiabilityAnalysisTime, 67.8s InterpolantComputationTime, 915 NumberOfCodeBlocks, 915 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1250 ConstructedInterpolants, 136 QuantifiedInterpolants, 22327 SizeOfPredicates, 277 NumberOfNonLiveVariables, 3467 ConjunctsInSsa, 681 ConjunctsInUnsatCore, 39 InterpolantComputations, 8 PerfectInterpolantSequences, 84/805 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