/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:11:56,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:11:56,745 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 09:11:56,749 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:11:56,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:11:56,771 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:11:56,772 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:11:56,772 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:11:56,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:11:56,775 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:11:56,775 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:11:56,775 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:11:56,775 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:11:56,776 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:11:56,776 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:11:56,777 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:11:56,777 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:11:56,777 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:11:56,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:11:56,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:11:56,777 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:11:56,778 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:11:56,778 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:11:56,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:11:56,779 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:11:56,779 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:11:56,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:11:56,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:11:56,779 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:11:56,779 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:11:56,780 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:11:56,780 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:11:56,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:11:56,780 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:11:56,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:11:56,781 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:11:57,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:11:57,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:11:57,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:11:57,024 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:11:57,025 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:11:57,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-24 09:11:57,918 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:11:58,093 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:11:58,094 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-24 09:11:58,100 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fdcf245b/371b484df6524beaa005481edc4fd425/FLAGaae2a45db [2023-08-24 09:11:58,108 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fdcf245b/371b484df6524beaa005481edc4fd425 [2023-08-24 09:11:58,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:11:58,112 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:11:58,112 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:11:58,112 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:11:58,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:11:58,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1af712d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58, skipping insertion in model container [2023-08-24 09:11:58,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,132 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:11:58,276 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-24 09:11:58,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:11:58,297 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:11:58,325 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-24 09:11:58,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:11:58,338 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:11:58,338 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:11:58,342 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:11:58,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58 WrapperNode [2023-08-24 09:11:58,343 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:11:58,343 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:11:58,344 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:11:58,344 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:11:58,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,365 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,397 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 280 [2023-08-24 09:11:58,397 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:11:58,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:11:58,398 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:11:58,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:11:58,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,417 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,417 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,422 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,425 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,426 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,427 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,442 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:11:58,442 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:11:58,442 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:11:58,442 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:11:58,443 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (1/1) ... [2023-08-24 09:11:58,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:11:58,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:11:58,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 09:11:58,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 09:11:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:11:58,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:11:58,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:11:58,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:11:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:11:58,493 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:11:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:11:58,493 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:11:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 09:11:58,493 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 09:11:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:11:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 09:11:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 09:11:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 09:11:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:11:58,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:11:58,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:11:58,496 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 09:11:58,574 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:11:58,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:11:58,902 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:11:59,079 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:11:59,079 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-24 09:11:59,081 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:11:59 BoogieIcfgContainer [2023-08-24 09:11:59,081 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:11:59,083 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:11:59,083 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:11:59,085 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:11:59,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:11:58" (1/3) ... [2023-08-24 09:11:59,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3356d854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:11:59, skipping insertion in model container [2023-08-24 09:11:59,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:11:58" (2/3) ... [2023-08-24 09:11:59,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3356d854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:11:59, skipping insertion in model container [2023-08-24 09:11:59,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:11:59" (3/3) ... [2023-08-24 09:11:59,088 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2023-08-24 09:11:59,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:11:59,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:11:59,100 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:11:59,152 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 09:11:59,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 185 transitions, 394 flow [2023-08-24 09:11:59,266 INFO L124 PetriNetUnfolderBase]: 16/182 cut-off events. [2023-08-24 09:11:59,266 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:11:59,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 182 events. 16/182 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 121 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2023-08-24 09:11:59,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 185 transitions, 394 flow [2023-08-24 09:11:59,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 172 transitions, 362 flow [2023-08-24 09:11:59,284 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:11:59,293 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 172 transitions, 362 flow [2023-08-24 09:11:59,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 172 transitions, 362 flow [2023-08-24 09:11:59,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 172 transitions, 362 flow [2023-08-24 09:11:59,344 INFO L124 PetriNetUnfolderBase]: 16/172 cut-off events. [2023-08-24 09:11:59,346 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:11:59,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 172 events. 16/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 120 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2023-08-24 09:11:59,350 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-08-24 09:12:04,732 INFO L134 LiptonReduction]: Checked pairs total: 1610 [2023-08-24 09:12:04,732 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-24 09:12:04,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:12:04,748 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;@55f1121, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:12:04,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 09:12:04,756 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:12:04,756 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-08-24 09:12:04,756 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:12:04,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:04,757 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] [2023-08-24 09:12:04,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:04,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1685240423, now seen corresponding path program 1 times [2023-08-24 09:12:04,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:04,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131642231] [2023-08-24 09:12:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:04,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:12:05,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131642231] [2023-08-24 09:12:05,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131642231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:12:05,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:12:05,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:12:05,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087653673] [2023-08-24 09:12:05,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:12:05,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:12:05,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:05,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:12:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 09:12:05,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 365 [2023-08-24 09:12:05,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:05,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 365 [2023-08-24 09:12:05,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:05,482 INFO L124 PetriNetUnfolderBase]: 341/476 cut-off events. [2023-08-24 09:12:05,482 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-08-24 09:12:05,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 476 events. 341/476 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1453 event pairs, 132 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 756. Up to 366 conditions per place. [2023-08-24 09:12:05,486 INFO L140 encePairwiseOnDemand]: 357/365 looper letters, 30 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2023-08-24 09:12:05,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 180 flow [2023-08-24 09:12:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:12:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:12:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 694 transitions. [2023-08-24 09:12:05,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802739726027397 [2023-08-24 09:12:05,497 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 694 transitions. [2023-08-24 09:12:05,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 694 transitions. [2023-08-24 09:12:05,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:05,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 694 transitions. [2023-08-24 09:12:05,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 365.0) internal successors, (2190), 6 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,508 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 365.0) internal successors, (2190), 6 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,509 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 5 states and 694 transitions. [2023-08-24 09:12:05,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 180 flow [2023-08-24 09:12:05,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 09:12:05,512 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 106 flow [2023-08-24 09:12:05,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-08-24 09:12:05,515 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-08-24 09:12:05,515 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 106 flow [2023-08-24 09:12:05,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:05,516 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, 1] [2023-08-24 09:12:05,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:12:05,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:05,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1243308718, now seen corresponding path program 1 times [2023-08-24 09:12:05,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:05,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456639684] [2023-08-24 09:12:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:05,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:12:05,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:05,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456639684] [2023-08-24 09:12:05,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456639684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:12:05,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:12:05,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:12:05,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682966868] [2023-08-24 09:12:05,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:12:05,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:12:05,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:12:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:12:05,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 365 [2023-08-24 09:12:05,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:05,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 365 [2023-08-24 09:12:05,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:05,780 INFO L124 PetriNetUnfolderBase]: 339/475 cut-off events. [2023-08-24 09:12:05,780 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-08-24 09:12:05,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 475 events. 339/475 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1450 event pairs, 177 based on Foata normal form. 3/318 useless extension candidates. Maximal degree in co-relation 1077. Up to 469 conditions per place. [2023-08-24 09:12:05,783 INFO L140 encePairwiseOnDemand]: 360/365 looper letters, 23 selfloop transitions, 4 changer transitions 1/30 dead transitions. [2023-08-24 09:12:05,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 157 flow [2023-08-24 09:12:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:12:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:12:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 522 transitions. [2023-08-24 09:12:05,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35753424657534244 [2023-08-24 09:12:05,785 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 522 transitions. [2023-08-24 09:12:05,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 522 transitions. [2023-08-24 09:12:05,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:05,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 522 transitions. [2023-08-24 09:12:05,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,789 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,789 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 106 flow. Second operand 4 states and 522 transitions. [2023-08-24 09:12:05,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 157 flow [2023-08-24 09:12:05,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 152 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 09:12:05,791 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 100 flow [2023-08-24 09:12:05,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-24 09:12:05,792 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-24 09:12:05,792 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 100 flow [2023-08-24 09:12:05,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:05,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:05,793 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, 1, 1, 1] [2023-08-24 09:12:05,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 09:12:05,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:05,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:05,793 INFO L85 PathProgramCache]: Analyzing trace with hash -305089118, now seen corresponding path program 1 times [2023-08-24 09:12:05,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:05,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614284128] [2023-08-24 09:12:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:05,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:12:05,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:05,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614284128] [2023-08-24 09:12:05,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614284128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:12:05,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73052721] [2023-08-24 09:12:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:05,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:05,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:12:05,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:12:05,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 09:12:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:06,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 09:12:06,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:12:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:12:06,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:12:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:12:06,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73052721] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:12:06,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:12:06,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 09:12:06,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002062314] [2023-08-24 09:12:06,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:12:06,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:12:06,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:06,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:12:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 09:12:06,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 365 [2023-08-24 09:12:06,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:06,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:06,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 365 [2023-08-24 09:12:06,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:06,215 INFO L124 PetriNetUnfolderBase]: 312/456 cut-off events. [2023-08-24 09:12:06,215 INFO L125 PetriNetUnfolderBase]: For 26/39 co-relation queries the response was YES. [2023-08-24 09:12:06,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 456 events. 312/456 cut-off events. For 26/39 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1481 event pairs, 74 based on Foata normal form. 13/328 useless extension candidates. Maximal degree in co-relation 983. Up to 352 conditions per place. [2023-08-24 09:12:06,217 INFO L140 encePairwiseOnDemand]: 360/365 looper letters, 34 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-08-24 09:12:06,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 204 flow [2023-08-24 09:12:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:12:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:12:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2023-08-24 09:12:06,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36767123287671233 [2023-08-24 09:12:06,220 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2023-08-24 09:12:06,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2023-08-24 09:12:06,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:06,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2023-08-24 09:12:06,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:06,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 365.0) internal successors, (2190), 6 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:06,224 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 365.0) internal successors, (2190), 6 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:06,224 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 100 flow. Second operand 5 states and 671 transitions. [2023-08-24 09:12:06,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 204 flow [2023-08-24 09:12:06,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 191 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 09:12:06,226 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 103 flow [2023-08-24 09:12:06,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-24 09:12:06,226 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-24 09:12:06,226 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 103 flow [2023-08-24 09:12:06,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:06,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:06,227 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, 1, 1, 1, 1] [2023-08-24 09:12:06,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 09:12:06,432 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 [2023-08-24 09:12:06,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:06,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:06,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1306086369, now seen corresponding path program 1 times [2023-08-24 09:12:06,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:06,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137610406] [2023-08-24 09:12:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:06,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:12:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137610406] [2023-08-24 09:12:07,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137610406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:12:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547214457] [2023-08-24 09:12:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:07,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:07,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:12:07,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:12:07,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 09:12:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:07,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 09:12:07,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:12:08,020 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:12:08,033 INFO L322 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2023-08-24 09:12:08,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 25 [2023-08-24 09:12:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:08,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:12:08,148 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:08,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-08-24 09:12:08,276 INFO L322 Elim1Store]: treesize reduction 57, result has 26.0 percent of original size [2023-08-24 09:12:08,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2023-08-24 09:12:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:08,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547214457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:12:08,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:12:08,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 28 [2023-08-24 09:12:08,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751752362] [2023-08-24 09:12:08,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:12:08,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:12:08,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:08,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:12:08,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-08-24 09:12:08,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 365 [2023-08-24 09:12:08,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 103 flow. Second operand has 30 states, 30 states have (on average 85.0) internal successors, (2550), 30 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:08,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:08,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 365 [2023-08-24 09:12:08,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:09,525 INFO L124 PetriNetUnfolderBase]: 884/1285 cut-off events. [2023-08-24 09:12:09,525 INFO L125 PetriNetUnfolderBase]: For 463/463 co-relation queries the response was YES. [2023-08-24 09:12:09,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3325 conditions, 1285 events. 884/1285 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4550 event pairs, 121 based on Foata normal form. 1/1032 useless extension candidates. Maximal degree in co-relation 2211. Up to 719 conditions per place. [2023-08-24 09:12:09,531 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 101 selfloop transitions, 62 changer transitions 1/164 dead transitions. [2023-08-24 09:12:09,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 164 transitions, 819 flow [2023-08-24 09:12:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 09:12:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 09:12:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2072 transitions. [2023-08-24 09:12:09,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24681357951161406 [2023-08-24 09:12:09,536 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2072 transitions. [2023-08-24 09:12:09,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2072 transitions. [2023-08-24 09:12:09,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:09,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2072 transitions. [2023-08-24 09:12:09,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 90.08695652173913) internal successors, (2072), 23 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:09,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 365.0) internal successors, (8760), 24 states have internal predecessors, (8760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:09,547 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 365.0) internal successors, (8760), 24 states have internal predecessors, (8760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:09,547 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 103 flow. Second operand 23 states and 2072 transitions. [2023-08-24 09:12:09,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 164 transitions, 819 flow [2023-08-24 09:12:09,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 164 transitions, 777 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-24 09:12:09,550 INFO L231 Difference]: Finished difference. Result has 68 places, 89 transitions, 502 flow [2023-08-24 09:12:09,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=502, PETRI_PLACES=68, PETRI_TRANSITIONS=89} [2023-08-24 09:12:09,551 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2023-08-24 09:12:09,551 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 89 transitions, 502 flow [2023-08-24 09:12:09,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 85.0) internal successors, (2550), 30 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:09,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:09,552 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, 1, 1, 1, 1] [2023-08-24 09:12:09,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 09:12:09,756 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,SelfDestructingSolverStorable3 [2023-08-24 09:12:09,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:09,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1252683873, now seen corresponding path program 2 times [2023-08-24 09:12:09,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:09,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152454668] [2023-08-24 09:12:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:09,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:10,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:10,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152454668] [2023-08-24 09:12:10,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152454668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:12:10,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032588978] [2023-08-24 09:12:10,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:12:10,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:10,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:12:10,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:12:10,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 09:12:10,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:12:10,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:12:10,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-24 09:12:10,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:12:11,003 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 09:12:11,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 09:12:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:11,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:12:11,159 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:11,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-08-24 09:12:11,288 INFO L322 Elim1Store]: treesize reduction 57, result has 26.0 percent of original size [2023-08-24 09:12:11,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2023-08-24 09:12:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032588978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:12:11,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:12:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2023-08-24 09:12:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099984041] [2023-08-24 09:12:11,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:12:11,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:12:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:12:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-08-24 09:12:11,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 09:12:11,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 89 transitions, 502 flow. Second operand has 30 states, 30 states have (on average 98.06666666666666) internal successors, (2942), 30 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:11,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:11,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 09:12:11,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:14,057 INFO L124 PetriNetUnfolderBase]: 1321/1930 cut-off events. [2023-08-24 09:12:14,057 INFO L125 PetriNetUnfolderBase]: For 3697/3697 co-relation queries the response was YES. [2023-08-24 09:12:14,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7240 conditions, 1930 events. 1321/1930 cut-off events. For 3697/3697 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7626 event pairs, 49 based on Foata normal form. 2/1926 useless extension candidates. Maximal degree in co-relation 5529. Up to 1119 conditions per place. [2023-08-24 09:12:14,066 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 140 selfloop transitions, 155 changer transitions 9/304 dead transitions. [2023-08-24 09:12:14,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 304 transitions, 2088 flow [2023-08-24 09:12:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 09:12:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 09:12:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3889 transitions. [2023-08-24 09:12:14,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2803893294881038 [2023-08-24 09:12:14,075 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3889 transitions. [2023-08-24 09:12:14,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3889 transitions. [2023-08-24 09:12:14,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:14,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3889 transitions. [2023-08-24 09:12:14,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 102.34210526315789) internal successors, (3889), 38 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:14,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 365.0) internal successors, (14235), 39 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:14,096 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 365.0) internal successors, (14235), 39 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:14,096 INFO L175 Difference]: Start difference. First operand has 68 places, 89 transitions, 502 flow. Second operand 38 states and 3889 transitions. [2023-08-24 09:12:14,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 304 transitions, 2088 flow [2023-08-24 09:12:14,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 304 transitions, 2056 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-24 09:12:14,112 INFO L231 Difference]: Finished difference. Result has 113 places, 210 transitions, 1643 flow [2023-08-24 09:12:14,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1643, PETRI_PLACES=113, PETRI_TRANSITIONS=210} [2023-08-24 09:12:14,114 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 82 predicate places. [2023-08-24 09:12:14,114 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 210 transitions, 1643 flow [2023-08-24 09:12:14,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 98.06666666666666) internal successors, (2942), 30 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:14,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:14,115 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, 1, 1, 1, 1] [2023-08-24 09:12:14,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 09:12:14,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:14,320 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:14,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2065015699, now seen corresponding path program 3 times [2023-08-24 09:12:14,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:14,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829284052] [2023-08-24 09:12:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:14,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:15,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:15,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829284052] [2023-08-24 09:12:15,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829284052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:12:15,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694707038] [2023-08-24 09:12:15,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:12:15,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:15,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:12:15,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:12:15,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 09:12:15,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:12:15,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:12:15,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 09:12:15,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:12:15,487 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 09:12:15,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 09:12:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:15,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:12:15,694 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:15,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 87 [2023-08-24 09:12:15,813 INFO L322 Elim1Store]: treesize reduction 57, result has 26.0 percent of original size [2023-08-24 09:12:15,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 29 [2023-08-24 09:12:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:16,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694707038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:12:16,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:12:16,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2023-08-24 09:12:16,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967759094] [2023-08-24 09:12:16,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:12:16,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:12:16,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:12:16,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2023-08-24 09:12:16,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 09:12:16,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 210 transitions, 1643 flow. Second operand has 30 states, 30 states have (on average 98.33333333333333) internal successors, (2950), 30 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:16,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:16,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 09:12:16,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:20,913 INFO L124 PetriNetUnfolderBase]: 2362/3509 cut-off events. [2023-08-24 09:12:20,914 INFO L125 PetriNetUnfolderBase]: For 10488/10488 co-relation queries the response was YES. [2023-08-24 09:12:20,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15683 conditions, 3509 events. 2362/3509 cut-off events. For 10488/10488 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16295 event pairs, 104 based on Foata normal form. 3/3512 useless extension candidates. Maximal degree in co-relation 15579. Up to 1665 conditions per place. [2023-08-24 09:12:20,933 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 320 selfloop transitions, 325 changer transitions 12/657 dead transitions. [2023-08-24 09:12:20,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 657 transitions, 5380 flow [2023-08-24 09:12:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-24 09:12:20,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-24 09:12:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 6925 transitions. [2023-08-24 09:12:20,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28317317521979146 [2023-08-24 09:12:20,945 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 6925 transitions. [2023-08-24 09:12:20,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 6925 transitions. [2023-08-24 09:12:20,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:20,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 6925 transitions. [2023-08-24 09:12:20,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 103.35820895522389) internal successors, (6925), 67 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:20,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 365.0) internal successors, (24820), 68 states have internal predecessors, (24820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:20,977 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 365.0) internal successors, (24820), 68 states have internal predecessors, (24820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:20,977 INFO L175 Difference]: Start difference. First operand has 113 places, 210 transitions, 1643 flow. Second operand 67 states and 6925 transitions. [2023-08-24 09:12:20,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 657 transitions, 5380 flow [2023-08-24 09:12:21,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 657 transitions, 4691 flow, removed 332 selfloop flow, removed 7 redundant places. [2023-08-24 09:12:21,046 INFO L231 Difference]: Finished difference. Result has 190 places, 407 transitions, 3490 flow [2023-08-24 09:12:21,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=3490, PETRI_PLACES=190, PETRI_TRANSITIONS=407} [2023-08-24 09:12:21,046 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 159 predicate places. [2023-08-24 09:12:21,046 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 407 transitions, 3490 flow [2023-08-24 09:12:21,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 98.33333333333333) internal successors, (2950), 30 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:21,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:21,048 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, 1, 1, 1, 1] [2023-08-24 09:12:21,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 09:12:21,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:21,253 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:21,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:21,253 INFO L85 PathProgramCache]: Analyzing trace with hash 158646507, now seen corresponding path program 4 times [2023-08-24 09:12:21,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:21,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218495599] [2023-08-24 09:12:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:21,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:22,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:22,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218495599] [2023-08-24 09:12:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218495599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:12:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834667540] [2023-08-24 09:12:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:12:22,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:12:22,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:12:22,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 09:12:22,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:12:22,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:12:22,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-24 09:12:22,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:12:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:22,482 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:12:22,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 09:12:22,609 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 09:12:22,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 09:12:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:22,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:12:22,851 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:22,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 170 [2023-08-24 09:12:22,860 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:22,860 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 94 treesize of output 78 [2023-08-24 09:12:23,120 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:12:23,120 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:12:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:23,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:23,129 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:23,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 23 [2023-08-24 09:12:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:23,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834667540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:12:23,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:12:23,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-08-24 09:12:23,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444905863] [2023-08-24 09:12:23,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:12:23,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 09:12:23,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:23,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 09:12:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1039, Unknown=1, NotChecked=0, Total=1190 [2023-08-24 09:12:23,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 365 [2023-08-24 09:12:23,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 407 transitions, 3490 flow. Second operand has 35 states, 35 states have (on average 90.77142857142857) internal successors, (3177), 35 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:23,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:23,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 365 [2023-08-24 09:12:23,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:24,943 INFO L124 PetriNetUnfolderBase]: 2544/3835 cut-off events. [2023-08-24 09:12:24,943 INFO L125 PetriNetUnfolderBase]: For 16630/16630 co-relation queries the response was YES. [2023-08-24 09:12:24,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19216 conditions, 3835 events. 2544/3835 cut-off events. For 16630/16630 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18446 event pairs, 383 based on Foata normal form. 1/3830 useless extension candidates. Maximal degree in co-relation 19099. Up to 3210 conditions per place. [2023-08-24 09:12:24,975 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 350 selfloop transitions, 173 changer transitions 6/529 dead transitions. [2023-08-24 09:12:24,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 529 transitions, 5590 flow [2023-08-24 09:12:24,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 09:12:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 09:12:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1528 transitions. [2023-08-24 09:12:24,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26164383561643834 [2023-08-24 09:12:24,977 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1528 transitions. [2023-08-24 09:12:24,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1528 transitions. [2023-08-24 09:12:24,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:24,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1528 transitions. [2023-08-24 09:12:24,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 95.5) internal successors, (1528), 16 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:24,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 365.0) internal successors, (6205), 17 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:24,983 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 365.0) internal successors, (6205), 17 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:24,983 INFO L175 Difference]: Start difference. First operand has 190 places, 407 transitions, 3490 flow. Second operand 16 states and 1528 transitions. [2023-08-24 09:12:24,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 529 transitions, 5590 flow [2023-08-24 09:12:25,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 529 transitions, 5037 flow, removed 223 selfloop flow, removed 14 redundant places. [2023-08-24 09:12:25,040 INFO L231 Difference]: Finished difference. Result has 196 places, 482 transitions, 4189 flow [2023-08-24 09:12:25,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4189, PETRI_PLACES=196, PETRI_TRANSITIONS=482} [2023-08-24 09:12:25,041 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 165 predicate places. [2023-08-24 09:12:25,041 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 482 transitions, 4189 flow [2023-08-24 09:12:25,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 90.77142857142857) internal successors, (3177), 35 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:25,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:25,042 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, 1, 1, 1, 1] [2023-08-24 09:12:25,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 09:12:25,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:25,249 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:25,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1520683317, now seen corresponding path program 5 times [2023-08-24 09:12:25,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:25,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905967461] [2023-08-24 09:12:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:25,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:12:26,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905967461] [2023-08-24 09:12:26,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905967461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:12:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807549175] [2023-08-24 09:12:26,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:12:26,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:12:26,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:12:26,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 09:12:26,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:12:26,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:12:26,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 09:12:26,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:12:26,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:26,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:26,576 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:12:26,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 09:12:26,667 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 09:12:26,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 09:12:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:26,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:12:26,902 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_358 (Array Int Int)) (~M~0 Int)) (or (<= c_~res1~0 (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_358)) (.cse1 (* ~M~0 4))) (+ (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset))))) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (forall ((v_ArrVal_358 (Array Int Int)) (~M~0 Int)) (or (< (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_358)) (.cse3 (* ~M~0 4))) (+ (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3)) c_~res2~0 (select (select .cse2 c_~B~0.base) (+ .cse3 c_~B~0.offset)))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 09:12:26,979 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:26,979 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 166 [2023-08-24 09:12:26,990 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:26,990 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 90 treesize of output 74 [2023-08-24 09:12:27,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:12:27,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:12:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:27,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:27,333 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:27,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 25 [2023-08-24 09:12:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-24 09:12:27,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807549175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:12:27,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:12:27,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 10] total 30 [2023-08-24 09:12:27,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252159749] [2023-08-24 09:12:27,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:12:27,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:12:27,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:12:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=818, Unknown=1, NotChecked=58, Total=992 [2023-08-24 09:12:27,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 09:12:27,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 482 transitions, 4189 flow. Second operand has 32 states, 32 states have (on average 86.9375) internal successors, (2782), 32 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:27,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:27,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 09:12:27,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:35,803 INFO L124 PetriNetUnfolderBase]: 4580/6877 cut-off events. [2023-08-24 09:12:35,803 INFO L125 PetriNetUnfolderBase]: For 34892/34892 co-relation queries the response was YES. [2023-08-24 09:12:35,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34945 conditions, 6877 events. 4580/6877 cut-off events. For 34892/34892 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37240 event pairs, 520 based on Foata normal form. 1/6778 useless extension candidates. Maximal degree in co-relation 34824. Up to 3443 conditions per place. [2023-08-24 09:12:35,844 INFO L140 encePairwiseOnDemand]: 345/365 looper letters, 537 selfloop transitions, 404 changer transitions 1/942 dead transitions. [2023-08-24 09:12:35,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 942 transitions, 9842 flow [2023-08-24 09:12:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 09:12:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 09:12:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3394 transitions. [2023-08-24 09:12:35,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25829528158295284 [2023-08-24 09:12:35,849 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3394 transitions. [2023-08-24 09:12:35,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3394 transitions. [2023-08-24 09:12:35,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:35,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3394 transitions. [2023-08-24 09:12:35,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 94.27777777777777) internal successors, (3394), 36 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:35,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 365.0) internal successors, (13505), 37 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:35,860 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 365.0) internal successors, (13505), 37 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:35,860 INFO L175 Difference]: Start difference. First operand has 196 places, 482 transitions, 4189 flow. Second operand 36 states and 3394 transitions. [2023-08-24 09:12:35,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 942 transitions, 9842 flow [2023-08-24 09:12:35,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 942 transitions, 9676 flow, removed 49 selfloop flow, removed 5 redundant places. [2023-08-24 09:12:35,988 INFO L231 Difference]: Finished difference. Result has 241 places, 734 transitions, 7795 flow [2023-08-24 09:12:35,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7795, PETRI_PLACES=241, PETRI_TRANSITIONS=734} [2023-08-24 09:12:35,989 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 210 predicate places. [2023-08-24 09:12:35,989 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 734 transitions, 7795 flow [2023-08-24 09:12:35,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 86.9375) internal successors, (2782), 32 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:35,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:35,989 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, 1, 1, 1, 1] [2023-08-24 09:12:35,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 09:12:36,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:36,190 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:36,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:36,190 INFO L85 PathProgramCache]: Analyzing trace with hash -541688475, now seen corresponding path program 6 times [2023-08-24 09:12:36,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:36,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570626893] [2023-08-24 09:12:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:36,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:12:37,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:37,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570626893] [2023-08-24 09:12:37,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570626893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:12:37,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536443502] [2023-08-24 09:12:37,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:12:37,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:37,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:12:37,013 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) [2023-08-24 09:12:37,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 09:12:37,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:12:37,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:12:37,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 09:12:37,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:12:37,379 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:37,379 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 40 treesize of output 24 [2023-08-24 09:12:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:37,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:12:37,532 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:37,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-08-24 09:12:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:37,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536443502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:12:37,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:12:37,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 26 [2023-08-24 09:12:37,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697183883] [2023-08-24 09:12:37,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:12:37,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 09:12:37,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:12:37,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 09:12:37,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2023-08-24 09:12:37,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 09:12:37,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 734 transitions, 7795 flow. Second operand has 28 states, 28 states have (on average 87.10714285714286) internal successors, (2439), 28 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:37,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:12:37,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 09:12:37,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:12:39,733 INFO L124 PetriNetUnfolderBase]: 4742/7120 cut-off events. [2023-08-24 09:12:39,733 INFO L125 PetriNetUnfolderBase]: For 58057/58057 co-relation queries the response was YES. [2023-08-24 09:12:39,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45174 conditions, 7120 events. 4742/7120 cut-off events. For 58057/58057 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38770 event pairs, 1040 based on Foata normal form. 1/7081 useless extension candidates. Maximal degree in co-relation 45023. Up to 6356 conditions per place. [2023-08-24 09:12:39,786 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 641 selfloop transitions, 178 changer transitions 3/822 dead transitions. [2023-08-24 09:12:39,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 822 transitions, 10260 flow [2023-08-24 09:12:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 09:12:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 09:12:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1928 transitions. [2023-08-24 09:12:39,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25153294194390086 [2023-08-24 09:12:39,790 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1928 transitions. [2023-08-24 09:12:39,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1928 transitions. [2023-08-24 09:12:39,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:12:39,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1928 transitions. [2023-08-24 09:12:39,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 91.80952380952381) internal successors, (1928), 21 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:39,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 365.0) internal successors, (8030), 22 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:39,797 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 365.0) internal successors, (8030), 22 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:39,797 INFO L175 Difference]: Start difference. First operand has 241 places, 734 transitions, 7795 flow. Second operand 21 states and 1928 transitions. [2023-08-24 09:12:39,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 822 transitions, 10260 flow [2023-08-24 09:12:40,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 822 transitions, 9776 flow, removed 180 selfloop flow, removed 14 redundant places. [2023-08-24 09:12:40,043 INFO L231 Difference]: Finished difference. Result has 252 places, 761 transitions, 8017 flow [2023-08-24 09:12:40,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=7311, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8017, PETRI_PLACES=252, PETRI_TRANSITIONS=761} [2023-08-24 09:12:40,045 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 221 predicate places. [2023-08-24 09:12:40,045 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 761 transitions, 8017 flow [2023-08-24 09:12:40,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 87.10714285714286) internal successors, (2439), 28 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:12:40,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:12:40,046 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, 1, 1, 1, 1] [2023-08-24 09:12:40,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 09:12:40,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:40,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:12:40,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:12:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1678646093, now seen corresponding path program 7 times [2023-08-24 09:12:40,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:12:40,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398423630] [2023-08-24 09:12:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:12:40,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:12:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:12:41,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:12:41,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398423630] [2023-08-24 09:12:41,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398423630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:12:41,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123404398] [2023-08-24 09:12:41,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:12:41,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:12:41,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:12:41,020 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) [2023-08-24 09:12:41,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 09:12:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:12:41,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 77 conjunts are in the unsatisfiable core [2023-08-24 09:12:41,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:12:41,276 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 [2023-08-24 09:12:41,344 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 6 treesize of output 5 [2023-08-24 09:12:41,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:41,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:41,536 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:12:41,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 09:12:41,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:41,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:12:41,612 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:12:41,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 09:12:41,792 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 09:12:41,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 09:12:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:12:41,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:12:42,018 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int))) (or (< (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse1 (* ~M~0 4))) (+ c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)) (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int))) (or (<= c_~res1~0 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse3 (* ~M~0 4))) (+ c_~res2~0 (select (select .cse2 c_~B~0.base) (+ .cse3 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3))))) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 09:12:42,066 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (<= c_~N~0 ~M~0) (<= c_~res1~0 (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse1 (* ~M~0 4))) (+ (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)) c_~res2~0 (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1))))) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (< (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse3 (* ~M~0 4))) (+ (select (select .cse2 c_~B~0.base) (+ .cse3 c_~B~0.offset)) c_~res2~0 (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3)))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 09:12:42,105 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse1 (select (select |c_#memory_int| c_~B~0.base) (+ .cse6 c_~B~0.offset)))) (and (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (<= (+ .cse0 .cse1 c_~res1~0) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse3 (* ~M~0 4))) (+ (select (select .cse2 c_~B~0.base) (+ .cse3 c_~B~0.offset)) c_~res2~0 (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3))))) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (< (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse5 (* ~M~0 4))) (+ (select (select .cse4 c_~B~0.base) (+ .cse5 c_~B~0.offset)) c_~res2~0 (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse5)))) (+ .cse0 .cse1 c_~res1~0 1)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))))) is different from false [2023-08-24 09:12:42,126 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (.cse3 (select (select |c_#memory_int| c_~B~0.base) c_~B~0.offset))) (and (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (<= c_~N~0 ~M~0) (< (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse1 (* ~M~0 4))) (+ (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)) c_~res2~0 (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)))) (+ .cse2 .cse3 c_~res1~0 1)) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (<= c_~N~0 ~M~0) (<= (+ .cse2 .cse3 c_~res1~0) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse5 (* ~M~0 4))) (+ (select (select .cse4 c_~B~0.base) (+ .cse5 c_~B~0.offset)) c_~res2~0 (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse5))))) (< (+ ~M~0 1) c_~N~0))))) is different from false [2023-08-24 09:12:42,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:42,715 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 105 treesize of output 70 [2023-08-24 09:12:42,767 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:42,768 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38390 treesize of output 32314 [2023-08-24 09:12:42,877 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:42,878 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 2006 treesize of output 1630 [2023-08-24 09:12:42,939 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:42,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1622 treesize of output 1454 [2023-08-24 09:12:42,980 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:12:42,981 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 1398 treesize of output 1214 [2023-08-24 09:13:48,514 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:13:48,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 71 [2023-08-24 09:13:48,517 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:13:48,518 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:13:48,518 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:13:48,519 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:13:48,546 INFO L322 Elim1Store]: treesize reduction 49, result has 29.0 percent of original size [2023-08-24 09:13:48,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 630 treesize of output 457 [2023-08-24 09:13:48,573 INFO L322 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2023-08-24 09:13:48,574 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 77 [2023-08-24 09:13:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 09:13:48,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123404398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:13:48,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:13:48,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 30 [2023-08-24 09:13:48,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30262067] [2023-08-24 09:13:48,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:13:48,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:13:48,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:13:48,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=636, Unknown=13, NotChecked=220, Total=992 [2023-08-24 09:13:48,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 365 [2023-08-24 09:13:48,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 761 transitions, 8017 flow. Second operand has 32 states, 32 states have (on average 90.84375) internal successors, (2907), 32 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:48,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:48,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 365 [2023-08-24 09:13:48,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:50,795 INFO L124 PetriNetUnfolderBase]: 5046/7647 cut-off events. [2023-08-24 09:13:50,795 INFO L125 PetriNetUnfolderBase]: For 59238/59397 co-relation queries the response was YES. [2023-08-24 09:13:50,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47732 conditions, 7647 events. 5046/7647 cut-off events. For 59238/59397 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 43629 event pairs, 900 based on Foata normal form. 38/7537 useless extension candidates. Maximal degree in co-relation 47367. Up to 5858 conditions per place. [2023-08-24 09:13:50,857 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 621 selfloop transitions, 202 changer transitions 3/857 dead transitions. [2023-08-24 09:13:50,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 857 transitions, 10585 flow [2023-08-24 09:13:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:13:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:13:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1073 transitions. [2023-08-24 09:13:50,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2672478206724782 [2023-08-24 09:13:50,858 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1073 transitions. [2023-08-24 09:13:50,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1073 transitions. [2023-08-24 09:13:50,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:50,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1073 transitions. [2023-08-24 09:13:50,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 97.54545454545455) internal successors, (1073), 11 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:50,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:50,862 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:50,862 INFO L175 Difference]: Start difference. First operand has 252 places, 761 transitions, 8017 flow. Second operand 11 states and 1073 transitions. [2023-08-24 09:13:50,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 857 transitions, 10585 flow [2023-08-24 09:13:51,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 857 transitions, 10457 flow, removed 37 selfloop flow, removed 7 redundant places. [2023-08-24 09:13:51,203 INFO L231 Difference]: Finished difference. Result has 258 places, 799 transitions, 8978 flow [2023-08-24 09:13:51,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8978, PETRI_PLACES=258, PETRI_TRANSITIONS=799} [2023-08-24 09:13:51,203 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 227 predicate places. [2023-08-24 09:13:51,204 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 799 transitions, 8978 flow [2023-08-24 09:13:51,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 90.84375) internal successors, (2907), 32 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:51,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:51,204 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, 1, 1, 1, 1] [2023-08-24 09:13:51,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-24 09:13:51,411 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,SelfDestructingSolverStorable9 [2023-08-24 09:13:51,411 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:13:51,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash 57363835, now seen corresponding path program 8 times [2023-08-24 09:13:51,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:51,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237683027] [2023-08-24 09:13:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:13:52,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237683027] [2023-08-24 09:13:52,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237683027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:13:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329168579] [2023-08-24 09:13:52,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:13:52,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:13:52,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:13:52,435 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) [2023-08-24 09:13:52,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 09:13:52,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:13:52,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:13:52,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 09:13:52,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:13:52,907 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:13:52,917 INFO L322 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-08-24 09:13:52,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 27 [2023-08-24 09:13:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:52,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:13:53,081 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:13:53,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-08-24 09:13:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:53,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329168579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:13:53,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:13:53,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2023-08-24 09:13:53,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795767724] [2023-08-24 09:13:53,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:13:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:13:53,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:13:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2023-08-24 09:13:53,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 365 [2023-08-24 09:13:53,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 799 transitions, 8978 flow. Second operand has 32 states, 32 states have (on average 83.8125) internal successors, (2682), 32 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:53,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:53,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 365 [2023-08-24 09:13:53,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:13:56,022 INFO L124 PetriNetUnfolderBase]: 5543/8367 cut-off events. [2023-08-24 09:13:56,022 INFO L125 PetriNetUnfolderBase]: For 72140/72140 co-relation queries the response was YES. [2023-08-24 09:13:56,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54560 conditions, 8367 events. 5543/8367 cut-off events. For 72140/72140 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47244 event pairs, 1234 based on Foata normal form. 1/8328 useless extension candidates. Maximal degree in co-relation 54190. Up to 7702 conditions per place. [2023-08-24 09:13:56,082 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 683 selfloop transitions, 259 changer transitions 6/948 dead transitions. [2023-08-24 09:13:56,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 948 transitions, 12432 flow [2023-08-24 09:13:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:13:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:13:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1582 transitions. [2023-08-24 09:13:56,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24079147640791476 [2023-08-24 09:13:56,084 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1582 transitions. [2023-08-24 09:13:56,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1582 transitions. [2023-08-24 09:13:56,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:13:56,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1582 transitions. [2023-08-24 09:13:56,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.88888888888889) internal successors, (1582), 18 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:56,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 365.0) internal successors, (6935), 19 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:56,089 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 365.0) internal successors, (6935), 19 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:56,089 INFO L175 Difference]: Start difference. First operand has 258 places, 799 transitions, 8978 flow. Second operand 18 states and 1582 transitions. [2023-08-24 09:13:56,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 948 transitions, 12432 flow [2023-08-24 09:13:56,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 948 transitions, 12350 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-24 09:13:56,484 INFO L231 Difference]: Finished difference. Result has 276 places, 905 transitions, 10921 flow [2023-08-24 09:13:56,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=8896, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10921, PETRI_PLACES=276, PETRI_TRANSITIONS=905} [2023-08-24 09:13:56,485 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 245 predicate places. [2023-08-24 09:13:56,485 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 905 transitions, 10921 flow [2023-08-24 09:13:56,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 83.8125) internal successors, (2682), 32 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:56,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:13:56,486 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, 1, 1, 1, 1] [2023-08-24 09:13:56,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 09:13:56,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:13:56,686 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:13:56,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:13:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1913852367, now seen corresponding path program 9 times [2023-08-24 09:13:56,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:13:56,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143304736] [2023-08-24 09:13:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:13:56,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:13:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:13:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:13:57,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:13:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143304736] [2023-08-24 09:13:57,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143304736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:13:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764109862] [2023-08-24 09:13:57,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:13:57,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:13:57,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:13:57,533 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) [2023-08-24 09:13:57,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 09:13:57,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:13:57,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:13:57,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 09:13:57,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:13:57,979 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 09:13:57,979 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 09:13:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:58,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:13:58,194 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:13:58,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-08-24 09:13:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:13:58,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764109862] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:13:58,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:13:58,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 27 [2023-08-24 09:13:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867328816] [2023-08-24 09:13:58,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:13:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 09:13:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:13:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 09:13:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2023-08-24 09:13:58,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 09:13:58,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 905 transitions, 10921 flow. Second operand has 29 states, 29 states have (on average 87.10344827586206) internal successors, (2526), 29 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:13:58,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:13:58,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 09:13:58,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:02,029 INFO L124 PetriNetUnfolderBase]: 4886/7448 cut-off events. [2023-08-24 09:14:02,029 INFO L125 PetriNetUnfolderBase]: For 86927/86927 co-relation queries the response was YES. [2023-08-24 09:14:02,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54174 conditions, 7448 events. 4886/7448 cut-off events. For 86927/86927 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 42050 event pairs, 1076 based on Foata normal form. 18/7466 useless extension candidates. Maximal degree in co-relation 54090. Up to 5760 conditions per place. [2023-08-24 09:14:02,079 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 453 selfloop transitions, 407 changer transitions 9/869 dead transitions. [2023-08-24 09:14:02,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 869 transitions, 13044 flow [2023-08-24 09:14:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 09:14:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 09:14:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3112 transitions. [2023-08-24 09:14:02,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2507655116841257 [2023-08-24 09:14:02,083 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3112 transitions. [2023-08-24 09:14:02,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3112 transitions. [2023-08-24 09:14:02,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:02,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3112 transitions. [2023-08-24 09:14:02,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.52941176470588) internal successors, (3112), 34 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:02,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 365.0) internal successors, (12775), 35 states have internal predecessors, (12775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:02,093 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 365.0) internal successors, (12775), 35 states have internal predecessors, (12775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:02,093 INFO L175 Difference]: Start difference. First operand has 276 places, 905 transitions, 10921 flow. Second operand 34 states and 3112 transitions. [2023-08-24 09:14:02,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 869 transitions, 13044 flow [2023-08-24 09:14:02,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 869 transitions, 12446 flow, removed 226 selfloop flow, removed 19 redundant places. [2023-08-24 09:14:02,463 INFO L231 Difference]: Finished difference. Result has 252 places, 755 transitions, 10897 flow [2023-08-24 09:14:02,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=8722, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10897, PETRI_PLACES=252, PETRI_TRANSITIONS=755} [2023-08-24 09:14:02,464 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 221 predicate places. [2023-08-24 09:14:02,464 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 755 transitions, 10897 flow [2023-08-24 09:14:02,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 87.10344827586206) internal successors, (2526), 29 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:02,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:02,465 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, 1, 1, 1, 1] [2023-08-24 09:14:02,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:02,667 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,SelfDestructingSolverStorable11 [2023-08-24 09:14:02,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:02,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:02,668 INFO L85 PathProgramCache]: Analyzing trace with hash -572010343, now seen corresponding path program 10 times [2023-08-24 09:14:02,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:02,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451957899] [2023-08-24 09:14:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:02,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:03,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:03,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451957899] [2023-08-24 09:14:03,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451957899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:03,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800227516] [2023-08-24 09:14:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:14:03,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:03,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:03,238 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) [2023-08-24 09:14:03,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 09:14:03,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:14:03,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:03,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 09:14:03,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:03,670 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:14:03,680 INFO L322 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-08-24 09:14:03,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 27 [2023-08-24 09:14:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:03,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:03,885 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:14:03,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-08-24 09:14:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:04,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800227516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:04,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:04,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 27 [2023-08-24 09:14:04,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496400651] [2023-08-24 09:14:04,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:04,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 09:14:04,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:04,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 09:14:04,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-08-24 09:14:04,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 09:14:04,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 755 transitions, 10897 flow. Second operand has 29 states, 29 states have (on average 98.06896551724138) internal successors, (2844), 29 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:04,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:04,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 09:14:04,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:07,794 INFO L124 PetriNetUnfolderBase]: 5518/8420 cut-off events. [2023-08-24 09:14:07,794 INFO L125 PetriNetUnfolderBase]: For 84898/84898 co-relation queries the response was YES. [2023-08-24 09:14:07,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61338 conditions, 8420 events. 5518/8420 cut-off events. For 84898/84898 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 48711 event pairs, 1262 based on Foata normal form. 2/8422 useless extension candidates. Maximal degree in co-relation 61259. Up to 7237 conditions per place. [2023-08-24 09:14:07,853 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 631 selfloop transitions, 450 changer transitions 3/1084 dead transitions. [2023-08-24 09:14:07,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1084 transitions, 17846 flow [2023-08-24 09:14:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 09:14:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 09:14:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3659 transitions. [2023-08-24 09:14:07,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2784627092846271 [2023-08-24 09:14:07,860 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3659 transitions. [2023-08-24 09:14:07,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3659 transitions. [2023-08-24 09:14:07,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:07,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3659 transitions. [2023-08-24 09:14:07,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 101.63888888888889) internal successors, (3659), 36 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:07,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 365.0) internal successors, (13505), 37 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:07,870 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 365.0) internal successors, (13505), 37 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:07,870 INFO L175 Difference]: Start difference. First operand has 252 places, 755 transitions, 10897 flow. Second operand 36 states and 3659 transitions. [2023-08-24 09:14:07,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1084 transitions, 17846 flow [2023-08-24 09:14:08,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 1084 transitions, 17122 flow, removed 215 selfloop flow, removed 20 redundant places. [2023-08-24 09:14:08,271 INFO L231 Difference]: Finished difference. Result has 280 places, 999 transitions, 15658 flow [2023-08-24 09:14:08,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=10379, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15658, PETRI_PLACES=280, PETRI_TRANSITIONS=999} [2023-08-24 09:14:08,272 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 249 predicate places. [2023-08-24 09:14:08,272 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 999 transitions, 15658 flow [2023-08-24 09:14:08,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.06896551724138) internal successors, (2844), 29 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:08,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:08,273 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, 1, 1] [2023-08-24 09:14:08,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:08,477 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,SelfDestructingSolverStorable12 [2023-08-24 09:14:08,478 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:08,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:08,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1924477852, now seen corresponding path program 11 times [2023-08-24 09:14:08,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:08,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124726227] [2023-08-24 09:14:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:08,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:08,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124726227] [2023-08-24 09:14:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124726227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162110498] [2023-08-24 09:14:08,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:14:08,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:08,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:08,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 09:14:08,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:14:08,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:08,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:14:08,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:08,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:08,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162110498] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:08,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:08,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 09:14:08,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355384899] [2023-08-24 09:14:08,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:08,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:14:08,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:08,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:14:08,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:14:08,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 365 [2023-08-24 09:14:08,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 999 transitions, 15658 flow. Second operand has 14 states, 14 states have (on average 129.64285714285714) internal successors, (1815), 14 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:08,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:08,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 365 [2023-08-24 09:14:08,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:10,560 INFO L124 PetriNetUnfolderBase]: 4683/7534 cut-off events. [2023-08-24 09:14:10,560 INFO L125 PetriNetUnfolderBase]: For 111111/112115 co-relation queries the response was YES. [2023-08-24 09:14:10,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57340 conditions, 7534 events. 4683/7534 cut-off events. For 111111/112115 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 49605 event pairs, 805 based on Foata normal form. 835/8085 useless extension candidates. Maximal degree in co-relation 57248. Up to 3469 conditions per place. [2023-08-24 09:14:10,624 INFO L140 encePairwiseOnDemand]: 357/365 looper letters, 808 selfloop transitions, 117 changer transitions 45/1058 dead transitions. [2023-08-24 09:14:10,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1058 transitions, 17573 flow [2023-08-24 09:14:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:14:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:14:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1214 transitions. [2023-08-24 09:14:10,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369558599695586 [2023-08-24 09:14:10,626 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1214 transitions. [2023-08-24 09:14:10,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1214 transitions. [2023-08-24 09:14:10,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:10,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1214 transitions. [2023-08-24 09:14:10,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 134.88888888888889) internal successors, (1214), 9 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:10,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 365.0) internal successors, (3650), 10 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:10,629 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 365.0) internal successors, (3650), 10 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:10,629 INFO L175 Difference]: Start difference. First operand has 280 places, 999 transitions, 15658 flow. Second operand 9 states and 1214 transitions. [2023-08-24 09:14:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1058 transitions, 17573 flow [2023-08-24 09:14:11,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 1058 transitions, 16727 flow, removed 339 selfloop flow, removed 12 redundant places. [2023-08-24 09:14:11,185 INFO L231 Difference]: Finished difference. Result has 279 places, 818 transitions, 12523 flow [2023-08-24 09:14:11,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=12438, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12523, PETRI_PLACES=279, PETRI_TRANSITIONS=818} [2023-08-24 09:14:11,185 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 248 predicate places. [2023-08-24 09:14:11,185 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 818 transitions, 12523 flow [2023-08-24 09:14:11,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.64285714285714) internal successors, (1815), 14 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:11,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:11,186 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, 1, 1] [2023-08-24 09:14:11,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:11,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 09:14:11,393 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:11,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:11,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1796478652, now seen corresponding path program 12 times [2023-08-24 09:14:11,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:11,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116300259] [2023-08-24 09:14:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:11,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:11,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116300259] [2023-08-24 09:14:11,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116300259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934288934] [2023-08-24 09:14:11,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:14:11,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:11,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:11,524 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:11,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 09:14:11,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:14:11,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:11,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:14:11,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:11,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:11,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934288934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:11,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:11,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 09:14:11,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451639069] [2023-08-24 09:14:11,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:11,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:14:11,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:11,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:14:11,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:14:11,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 365 [2023-08-24 09:14:11,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 818 transitions, 12523 flow. Second operand has 17 states, 17 states have (on average 126.0) internal successors, (2142), 17 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:11,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:11,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 365 [2023-08-24 09:14:11,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:13,435 INFO L124 PetriNetUnfolderBase]: 4443/7249 cut-off events. [2023-08-24 09:14:13,435 INFO L125 PetriNetUnfolderBase]: For 102365/102707 co-relation queries the response was YES. [2023-08-24 09:14:13,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56427 conditions, 7249 events. 4443/7249 cut-off events. For 102365/102707 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 47890 event pairs, 1006 based on Foata normal form. 438/7512 useless extension candidates. Maximal degree in co-relation 56332. Up to 3123 conditions per place. [2023-08-24 09:14:13,496 INFO L140 encePairwiseOnDemand]: 357/365 looper letters, 420 selfloop transitions, 136 changer transitions 219/831 dead transitions. [2023-08-24 09:14:13,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 831 transitions, 14202 flow [2023-08-24 09:14:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:14:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:14:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1303 transitions. [2023-08-24 09:14:13,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35698630136986303 [2023-08-24 09:14:13,498 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1303 transitions. [2023-08-24 09:14:13,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1303 transitions. [2023-08-24 09:14:13,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:13,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1303 transitions. [2023-08-24 09:14:13,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.3) internal successors, (1303), 10 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:13,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:13,501 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:13,501 INFO L175 Difference]: Start difference. First operand has 279 places, 818 transitions, 12523 flow. Second operand 10 states and 1303 transitions. [2023-08-24 09:14:13,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 831 transitions, 14202 flow [2023-08-24 09:14:14,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 831 transitions, 14077 flow, removed 40 selfloop flow, removed 7 redundant places. [2023-08-24 09:14:14,145 INFO L231 Difference]: Finished difference. Result has 282 places, 564 transitions, 8610 flow [2023-08-24 09:14:14,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=11917, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8610, PETRI_PLACES=282, PETRI_TRANSITIONS=564} [2023-08-24 09:14:14,146 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 251 predicate places. [2023-08-24 09:14:14,146 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 564 transitions, 8610 flow [2023-08-24 09:14:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 126.0) internal successors, (2142), 17 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:14,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:14,146 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, 1, 1] [2023-08-24 09:14:14,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:14,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 09:14:14,349 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:14,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1827025797, now seen corresponding path program 13 times [2023-08-24 09:14:14,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:14,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435805047] [2023-08-24 09:14:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:14,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:14,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:14,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435805047] [2023-08-24 09:14:14,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435805047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:14,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788814177] [2023-08-24 09:14:14,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:14:14,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:14,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:14,443 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:14,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 09:14:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:14,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:14,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:14,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788814177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:14,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:14,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-24 09:14:14,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446491978] [2023-08-24 09:14:14,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:14,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 09:14:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 09:14:14,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-24 09:14:14,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 365 [2023-08-24 09:14:14,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 564 transitions, 8610 flow. Second operand has 15 states, 15 states have (on average 133.26666666666668) internal successors, (1999), 15 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:14,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:14,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 365 [2023-08-24 09:14:14,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:15,811 INFO L124 PetriNetUnfolderBase]: 3617/5922 cut-off events. [2023-08-24 09:14:15,812 INFO L125 PetriNetUnfolderBase]: For 118842/119881 co-relation queries the response was YES. [2023-08-24 09:14:15,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48393 conditions, 5922 events. 3617/5922 cut-off events. For 118842/119881 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 38575 event pairs, 1538 based on Foata normal form. 226/5791 useless extension candidates. Maximal degree in co-relation 48297. Up to 3582 conditions per place. [2023-08-24 09:14:15,863 INFO L140 encePairwiseOnDemand]: 360/365 looper letters, 459 selfloop transitions, 12 changer transitions 2/531 dead transitions. [2023-08-24 09:14:15,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 531 transitions, 9126 flow [2023-08-24 09:14:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 09:14:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 09:14:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1098 transitions. [2023-08-24 09:14:15,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37602739726027395 [2023-08-24 09:14:15,865 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1098 transitions. [2023-08-24 09:14:15,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1098 transitions. [2023-08-24 09:14:15,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:15,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1098 transitions. [2023-08-24 09:14:15,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 137.25) internal successors, (1098), 8 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:15,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 365.0) internal successors, (3285), 9 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:15,867 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 365.0) internal successors, (3285), 9 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:15,867 INFO L175 Difference]: Start difference. First operand has 282 places, 564 transitions, 8610 flow. Second operand 8 states and 1098 transitions. [2023-08-24 09:14:15,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 531 transitions, 9126 flow [2023-08-24 09:14:16,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 531 transitions, 8213 flow, removed 185 selfloop flow, removed 47 redundant places. [2023-08-24 09:14:16,274 INFO L231 Difference]: Finished difference. Result has 223 places, 382 transitions, 5096 flow [2023-08-24 09:14:16,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=5078, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5096, PETRI_PLACES=223, PETRI_TRANSITIONS=382} [2023-08-24 09:14:16,275 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 192 predicate places. [2023-08-24 09:14:16,275 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 382 transitions, 5096 flow [2023-08-24 09:14:16,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 133.26666666666668) internal successors, (1999), 15 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:16,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:16,275 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, 1, 1, 1, 1, 1] [2023-08-24 09:14:16,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:16,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:16,476 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:16,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1595298326, now seen corresponding path program 1 times [2023-08-24 09:14:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:16,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707889434] [2023-08-24 09:14:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:16,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:16,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707889434] [2023-08-24 09:14:16,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707889434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:16,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781408368] [2023-08-24 09:14:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:16,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:16,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:16,570 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:16,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 09:14:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:16,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:14:16,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:16,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:16,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781408368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:16,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:16,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 09:14:16,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33000814] [2023-08-24 09:14:16,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:16,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:14:16,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:14:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:14:16,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:16,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 382 transitions, 5096 flow. Second operand has 16 states, 16 states have (on average 121.5) internal successors, (1944), 16 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:16,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:16,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:16,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:17,914 INFO L124 PetriNetUnfolderBase]: 4062/6596 cut-off events. [2023-08-24 09:14:17,914 INFO L125 PetriNetUnfolderBase]: For 81666/81730 co-relation queries the response was YES. [2023-08-24 09:14:17,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48570 conditions, 6596 events. 4062/6596 cut-off events. For 81666/81730 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 41422 event pairs, 1009 based on Foata normal form. 102/6669 useless extension candidates. Maximal degree in co-relation 48493. Up to 2887 conditions per place. [2023-08-24 09:14:17,956 INFO L140 encePairwiseOnDemand]: 355/365 looper letters, 351 selfloop transitions, 77 changer transitions 29/476 dead transitions. [2023-08-24 09:14:17,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 476 transitions, 7164 flow [2023-08-24 09:14:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 09:14:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 09:14:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1530 transitions. [2023-08-24 09:14:17,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3493150684931507 [2023-08-24 09:14:17,958 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1530 transitions. [2023-08-24 09:14:17,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1530 transitions. [2023-08-24 09:14:17,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:17,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1530 transitions. [2023-08-24 09:14:17,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.5) internal successors, (1530), 12 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:17,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:17,962 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:17,962 INFO L175 Difference]: Start difference. First operand has 223 places, 382 transitions, 5096 flow. Second operand 12 states and 1530 transitions. [2023-08-24 09:14:17,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 476 transitions, 7164 flow [2023-08-24 09:14:18,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 476 transitions, 7122 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-24 09:14:18,270 INFO L231 Difference]: Finished difference. Result has 234 places, 380 transitions, 5346 flow [2023-08-24 09:14:18,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=5054, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5346, PETRI_PLACES=234, PETRI_TRANSITIONS=380} [2023-08-24 09:14:18,270 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2023-08-24 09:14:18,271 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 380 transitions, 5346 flow [2023-08-24 09:14:18,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.5) internal successors, (1944), 16 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:18,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:18,271 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, 1, 1, 1, 1, 1] [2023-08-24 09:14:18,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-24 09:14:18,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 09:14:18,477 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:18,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash -168384732, now seen corresponding path program 2 times [2023-08-24 09:14:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:18,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044667969] [2023-08-24 09:14:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:18,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:18,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044667969] [2023-08-24 09:14:18,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044667969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:18,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36791133] [2023-08-24 09:14:18,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:14:18,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:18,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:18,566 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:18,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 09:14:18,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:14:18,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:18,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:14:18,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:18,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:18,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36791133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:18,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:18,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 09:14:18,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190779736] [2023-08-24 09:14:18,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:18,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:14:18,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:14:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:14:18,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:18,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 380 transitions, 5346 flow. Second operand has 17 states, 17 states have (on average 121.23529411764706) internal successors, (2061), 17 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:18,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:18,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:18,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:19,913 INFO L124 PetriNetUnfolderBase]: 3764/6090 cut-off events. [2023-08-24 09:14:19,914 INFO L125 PetriNetUnfolderBase]: For 86284/86348 co-relation queries the response was YES. [2023-08-24 09:14:19,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47566 conditions, 6090 events. 3764/6090 cut-off events. For 86284/86348 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37869 event pairs, 779 based on Foata normal form. 190/6253 useless extension candidates. Maximal degree in co-relation 47483. Up to 2581 conditions per place. [2023-08-24 09:14:19,962 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 353 selfloop transitions, 99 changer transitions 18/489 dead transitions. [2023-08-24 09:14:19,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 489 transitions, 7752 flow [2023-08-24 09:14:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 09:14:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 09:14:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1527 transitions. [2023-08-24 09:14:19,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34863013698630135 [2023-08-24 09:14:19,964 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1527 transitions. [2023-08-24 09:14:19,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1527 transitions. [2023-08-24 09:14:19,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:19,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1527 transitions. [2023-08-24 09:14:19,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.25) internal successors, (1527), 12 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:19,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:19,968 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:19,968 INFO L175 Difference]: Start difference. First operand has 234 places, 380 transitions, 5346 flow. Second operand 12 states and 1527 transitions. [2023-08-24 09:14:19,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 489 transitions, 7752 flow [2023-08-24 09:14:20,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 489 transitions, 7432 flow, removed 114 selfloop flow, removed 10 redundant places. [2023-08-24 09:14:20,395 INFO L231 Difference]: Finished difference. Result has 237 places, 392 transitions, 5627 flow [2023-08-24 09:14:20,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=5099, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5627, PETRI_PLACES=237, PETRI_TRANSITIONS=392} [2023-08-24 09:14:20,395 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 206 predicate places. [2023-08-24 09:14:20,395 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 392 transitions, 5627 flow [2023-08-24 09:14:20,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 121.23529411764706) internal successors, (2061), 17 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:20,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:20,396 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, 1, 1, 1, 1, 1] [2023-08-24 09:14:20,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:20,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 09:14:20,596 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:20,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash -579722352, now seen corresponding path program 3 times [2023-08-24 09:14:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:20,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446068206] [2023-08-24 09:14:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:20,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:20,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:20,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446068206] [2023-08-24 09:14:20,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446068206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:20,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132040359] [2023-08-24 09:14:20,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:14:20,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:20,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:20,692 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:20,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 09:14:20,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:14:20,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:20,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:14:20,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:20,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:20,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132040359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:20,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:20,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 09:14:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876328826] [2023-08-24 09:14:20,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:14:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:14:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:14:20,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:20,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 392 transitions, 5627 flow. Second operand has 18 states, 18 states have (on average 121.16666666666667) internal successors, (2181), 18 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:20,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:20,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:20,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:21,934 INFO L124 PetriNetUnfolderBase]: 3360/5638 cut-off events. [2023-08-24 09:14:21,934 INFO L125 PetriNetUnfolderBase]: For 84522/84602 co-relation queries the response was YES. [2023-08-24 09:14:21,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43918 conditions, 5638 events. 3360/5638 cut-off events. For 84522/84602 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36491 event pairs, 801 based on Foata normal form. 286/5897 useless extension candidates. Maximal degree in co-relation 43836. Up to 2204 conditions per place. [2023-08-24 09:14:21,977 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 311 selfloop transitions, 63 changer transitions 67/458 dead transitions. [2023-08-24 09:14:21,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 458 transitions, 7286 flow [2023-08-24 09:14:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 09:14:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 09:14:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1520 transitions. [2023-08-24 09:14:21,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3470319634703196 [2023-08-24 09:14:21,979 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1520 transitions. [2023-08-24 09:14:21,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1520 transitions. [2023-08-24 09:14:21,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:21,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1520 transitions. [2023-08-24 09:14:21,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:21,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:21,983 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:21,983 INFO L175 Difference]: Start difference. First operand has 237 places, 392 transitions, 5627 flow. Second operand 12 states and 1520 transitions. [2023-08-24 09:14:21,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 458 transitions, 7286 flow [2023-08-24 09:14:22,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 458 transitions, 7055 flow, removed 33 selfloop flow, removed 14 redundant places. [2023-08-24 09:14:22,282 INFO L231 Difference]: Finished difference. Result has 233 places, 339 transitions, 4610 flow [2023-08-24 09:14:22,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=5179, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4610, PETRI_PLACES=233, PETRI_TRANSITIONS=339} [2023-08-24 09:14:22,283 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 202 predicate places. [2023-08-24 09:14:22,283 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 339 transitions, 4610 flow [2023-08-24 09:14:22,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 121.16666666666667) internal successors, (2181), 18 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:22,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:22,283 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, 1, 1, 1, 1, 1] [2023-08-24 09:14:22,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:22,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:22,488 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:22,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash -61414502, now seen corresponding path program 4 times [2023-08-24 09:14:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:22,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38344506] [2023-08-24 09:14:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:22,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:22,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:22,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38344506] [2023-08-24 09:14:22,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38344506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:22,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249808556] [2023-08-24 09:14:22,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:14:22,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:22,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:22,575 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:22,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 09:14:22,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:14:22,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:22,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:14:22,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:22,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 09:14:22,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249808556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:22,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:22,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 09:14:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746381819] [2023-08-24 09:14:22,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:22,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:14:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:14:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:14:22,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:22,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 339 transitions, 4610 flow. Second operand has 16 states, 16 states have (on average 121.4375) internal successors, (1943), 16 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:22,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:22,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:22,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:23,474 INFO L124 PetriNetUnfolderBase]: 2108/3650 cut-off events. [2023-08-24 09:14:23,474 INFO L125 PetriNetUnfolderBase]: For 53217/53283 co-relation queries the response was YES. [2023-08-24 09:14:23,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27039 conditions, 3650 events. 2108/3650 cut-off events. For 53217/53283 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22594 event pairs, 547 based on Foata normal form. 436/4063 useless extension candidates. Maximal degree in co-relation 26962. Up to 1900 conditions per place. [2023-08-24 09:14:23,495 INFO L140 encePairwiseOnDemand]: 356/365 looper letters, 194 selfloop transitions, 6 changer transitions 123/334 dead transitions. [2023-08-24 09:14:23,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 334 transitions, 5004 flow [2023-08-24 09:14:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 09:14:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 09:14:23,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1259 transitions. [2023-08-24 09:14:23,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34493150684931506 [2023-08-24 09:14:23,497 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1259 transitions. [2023-08-24 09:14:23,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1259 transitions. [2023-08-24 09:14:23,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:23,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1259 transitions. [2023-08-24 09:14:23,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 125.9) internal successors, (1259), 10 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:23,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:23,500 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:23,500 INFO L175 Difference]: Start difference. First operand has 233 places, 339 transitions, 4610 flow. Second operand 10 states and 1259 transitions. [2023-08-24 09:14:23,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 334 transitions, 5004 flow [2023-08-24 09:14:23,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 334 transitions, 4685 flow, removed 69 selfloop flow, removed 17 redundant places. [2023-08-24 09:14:23,637 INFO L231 Difference]: Finished difference. Result has 210 places, 211 transitions, 2411 flow [2023-08-24 09:14:23,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=3509, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2411, PETRI_PLACES=210, PETRI_TRANSITIONS=211} [2023-08-24 09:14:23,638 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 179 predicate places. [2023-08-24 09:14:23,638 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 211 transitions, 2411 flow [2023-08-24 09:14:23,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.4375) internal successors, (1943), 16 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:23,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:23,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:23,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:23,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:23,839 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:23,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash -838899043, now seen corresponding path program 14 times [2023-08-24 09:14:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:23,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570566442] [2023-08-24 09:14:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:14:23,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570566442] [2023-08-24 09:14:23,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570566442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612597969] [2023-08-24 09:14:23,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:14:23,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:23,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:23,923 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:23,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 09:14:24,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:14:24,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:24,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:24,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:14:24,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:14:24,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612597969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:24,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:24,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 09:14:24,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174214933] [2023-08-24 09:14:24,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:24,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:14:24,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:14:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:14:24,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 365 [2023-08-24 09:14:24,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 211 transitions, 2411 flow. Second operand has 20 states, 20 states have (on average 117.65) internal successors, (2353), 20 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:24,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:24,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 365 [2023-08-24 09:14:24,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:25,471 INFO L124 PetriNetUnfolderBase]: 1273/1926 cut-off events. [2023-08-24 09:14:25,471 INFO L125 PetriNetUnfolderBase]: For 24419/24419 co-relation queries the response was YES. [2023-08-24 09:14:25,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15458 conditions, 1926 events. 1273/1926 cut-off events. For 24419/24419 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8223 event pairs, 145 based on Foata normal form. 196/2116 useless extension candidates. Maximal degree in co-relation 15388. Up to 1176 conditions per place. [2023-08-24 09:14:25,484 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 243 selfloop transitions, 269 changer transitions 0/512 dead transitions. [2023-08-24 09:14:25,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 512 transitions, 7143 flow [2023-08-24 09:14:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 09:14:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 09:14:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 5455 transitions. [2023-08-24 09:14:25,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33211567732115677 [2023-08-24 09:14:25,489 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 5455 transitions. [2023-08-24 09:14:25,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 5455 transitions. [2023-08-24 09:14:25,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:25,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 5455 transitions. [2023-08-24 09:14:25,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 121.22222222222223) internal successors, (5455), 45 states have internal predecessors, (5455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:25,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 365.0) internal successors, (16790), 46 states have internal predecessors, (16790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:25,500 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 365.0) internal successors, (16790), 46 states have internal predecessors, (16790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:25,500 INFO L175 Difference]: Start difference. First operand has 210 places, 211 transitions, 2411 flow. Second operand 45 states and 5455 transitions. [2023-08-24 09:14:25,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 512 transitions, 7143 flow [2023-08-24 09:14:25,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 512 transitions, 6129 flow, removed 396 selfloop flow, removed 30 redundant places. [2023-08-24 09:14:25,585 INFO L231 Difference]: Finished difference. Result has 192 places, 368 transitions, 5210 flow [2023-08-24 09:14:25,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5210, PETRI_PLACES=192, PETRI_TRANSITIONS=368} [2023-08-24 09:14:25,585 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 161 predicate places. [2023-08-24 09:14:25,585 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 368 transitions, 5210 flow [2023-08-24 09:14:25,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 117.65) internal successors, (2353), 20 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:25,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:25,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:25,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:25,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:25,786 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:25,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash 571360288, now seen corresponding path program 15 times [2023-08-24 09:14:25,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:25,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098270095] [2023-08-24 09:14:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:25,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:25,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:25,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098270095] [2023-08-24 09:14:25,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098270095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:25,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88632762] [2023-08-24 09:14:25,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:14:25,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:25,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:25,875 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:25,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 09:14:25,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:14:25,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:25,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:25,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:26,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:26,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88632762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:26,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 09:14:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468628448] [2023-08-24 09:14:26,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:26,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:14:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:14:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:14:26,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:26,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 368 transitions, 5210 flow. Second operand has 18 states, 18 states have (on average 121.11111111111111) internal successors, (2180), 18 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:26,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:26,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:26,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:26,648 INFO L124 PetriNetUnfolderBase]: 1464/2208 cut-off events. [2023-08-24 09:14:26,648 INFO L125 PetriNetUnfolderBase]: For 50017/50026 co-relation queries the response was YES. [2023-08-24 09:14:26,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20060 conditions, 2208 events. 1464/2208 cut-off events. For 50017/50026 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9691 event pairs, 241 based on Foata normal form. 33/2219 useless extension candidates. Maximal degree in co-relation 19995. Up to 1398 conditions per place. [2023-08-24 09:14:26,664 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 319 selfloop transitions, 95 changer transitions 0/439 dead transitions. [2023-08-24 09:14:26,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 439 transitions, 7376 flow [2023-08-24 09:14:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:14:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:14:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1380 transitions. [2023-08-24 09:14:26,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3437110834371108 [2023-08-24 09:14:26,666 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1380 transitions. [2023-08-24 09:14:26,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1380 transitions. [2023-08-24 09:14:26,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:26,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1380 transitions. [2023-08-24 09:14:26,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 125.45454545454545) internal successors, (1380), 11 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:26,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:26,669 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:26,669 INFO L175 Difference]: Start difference. First operand has 192 places, 368 transitions, 5210 flow. Second operand 11 states and 1380 transitions. [2023-08-24 09:14:26,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 439 transitions, 7376 flow [2023-08-24 09:14:26,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 439 transitions, 5515 flow, removed 793 selfloop flow, removed 13 redundant places. [2023-08-24 09:14:26,834 INFO L231 Difference]: Finished difference. Result has 187 places, 373 transitions, 4146 flow [2023-08-24 09:14:26,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=3510, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4146, PETRI_PLACES=187, PETRI_TRANSITIONS=373} [2023-08-24 09:14:26,835 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2023-08-24 09:14:26,835 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 373 transitions, 4146 flow [2023-08-24 09:14:26,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 121.11111111111111) internal successors, (2180), 18 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:26,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:26,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:26,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:27,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 09:14:27,036 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:27,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1664455464, now seen corresponding path program 16 times [2023-08-24 09:14:27,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:27,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991235486] [2023-08-24 09:14:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:27,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:27,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991235486] [2023-08-24 09:14:27,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991235486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:27,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344877539] [2023-08-24 09:14:27,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:14:27,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:27,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:27,145 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:27,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 09:14:27,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:14:27,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:27,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:27,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:27,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:27,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344877539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:27,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:27,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 09:14:27,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507894696] [2023-08-24 09:14:27,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:27,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:14:27,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:27,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:14:27,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:14:27,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:27,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 373 transitions, 4146 flow. Second operand has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:27,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:27,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:27,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:27,929 INFO L124 PetriNetUnfolderBase]: 1780/2667 cut-off events. [2023-08-24 09:14:27,929 INFO L125 PetriNetUnfolderBase]: For 45583/45612 co-relation queries the response was YES. [2023-08-24 09:14:27,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21415 conditions, 2667 events. 1780/2667 cut-off events. For 45583/45612 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12015 event pairs, 267 based on Foata normal form. 30/2554 useless extension candidates. Maximal degree in co-relation 21352. Up to 1563 conditions per place. [2023-08-24 09:14:27,946 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 286 selfloop transitions, 140 changer transitions 0/451 dead transitions. [2023-08-24 09:14:27,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 451 transitions, 6136 flow [2023-08-24 09:14:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:14:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:14:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1379 transitions. [2023-08-24 09:14:27,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434620174346202 [2023-08-24 09:14:27,948 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1379 transitions. [2023-08-24 09:14:27,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1379 transitions. [2023-08-24 09:14:27,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:27,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1379 transitions. [2023-08-24 09:14:27,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:27,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:27,951 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:27,951 INFO L175 Difference]: Start difference. First operand has 187 places, 373 transitions, 4146 flow. Second operand 11 states and 1379 transitions. [2023-08-24 09:14:27,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 451 transitions, 6136 flow [2023-08-24 09:14:28,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 451 transitions, 5975 flow, removed 51 selfloop flow, removed 6 redundant places. [2023-08-24 09:14:28,035 INFO L231 Difference]: Finished difference. Result has 194 places, 383 transitions, 4645 flow [2023-08-24 09:14:28,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4645, PETRI_PLACES=194, PETRI_TRANSITIONS=383} [2023-08-24 09:14:28,035 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 163 predicate places. [2023-08-24 09:14:28,035 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 383 transitions, 4645 flow [2023-08-24 09:14:28,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:28,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:28,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:28,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:28,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-24 09:14:28,240 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:28,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1487590734, now seen corresponding path program 17 times [2023-08-24 09:14:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:28,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157668707] [2023-08-24 09:14:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:28,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:28,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:28,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157668707] [2023-08-24 09:14:28,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157668707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:28,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509840116] [2023-08-24 09:14:28,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:14:28,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:28,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:28,344 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:28,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 09:14:28,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:14:28,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:28,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 09:14:28,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:28,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:28,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509840116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:28,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:28,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-08-24 09:14:28,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377300385] [2023-08-24 09:14:28,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:28,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:14:28,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:28,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:14:28,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:14:28,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 365 [2023-08-24 09:14:28,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 383 transitions, 4645 flow. Second operand has 18 states, 18 states have (on average 117.88888888888889) internal successors, (2122), 18 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:28,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:28,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 365 [2023-08-24 09:14:28,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:30,001 INFO L124 PetriNetUnfolderBase]: 1954/2935 cut-off events. [2023-08-24 09:14:30,002 INFO L125 PetriNetUnfolderBase]: For 54679/54679 co-relation queries the response was YES. [2023-08-24 09:14:30,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24624 conditions, 2935 events. 1954/2935 cut-off events. For 54679/54679 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13454 event pairs, 231 based on Foata normal form. 16/2883 useless extension candidates. Maximal degree in co-relation 24558. Up to 1726 conditions per place. [2023-08-24 09:14:30,023 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 372 selfloop transitions, 276 changer transitions 0/648 dead transitions. [2023-08-24 09:14:30,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 648 transitions, 9651 flow [2023-08-24 09:14:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 09:14:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 09:14:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4715 transitions. [2023-08-24 09:14:30,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.331225851773797 [2023-08-24 09:14:30,042 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4715 transitions. [2023-08-24 09:14:30,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4715 transitions. [2023-08-24 09:14:30,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:30,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4715 transitions. [2023-08-24 09:14:30,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 120.8974358974359) internal successors, (4715), 39 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:30,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 365.0) internal successors, (14600), 40 states have internal predecessors, (14600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:30,051 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 365.0) internal successors, (14600), 40 states have internal predecessors, (14600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:30,051 INFO L175 Difference]: Start difference. First operand has 194 places, 383 transitions, 4645 flow. Second operand 39 states and 4715 transitions. [2023-08-24 09:14:30,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 648 transitions, 9651 flow [2023-08-24 09:14:30,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 648 transitions, 9221 flow, removed 51 selfloop flow, removed 8 redundant places. [2023-08-24 09:14:30,179 INFO L231 Difference]: Finished difference. Result has 232 places, 494 transitions, 7025 flow [2023-08-24 09:14:30,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=4360, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=7025, PETRI_PLACES=232, PETRI_TRANSITIONS=494} [2023-08-24 09:14:30,180 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 201 predicate places. [2023-08-24 09:14:30,180 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 494 transitions, 7025 flow [2023-08-24 09:14:30,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 117.88888888888889) internal successors, (2122), 18 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:30,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:30,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:30,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:30,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:30,385 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:30,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash 579444672, now seen corresponding path program 18 times [2023-08-24 09:14:30,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:30,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001845827] [2023-08-24 09:14:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:14:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001845827] [2023-08-24 09:14:30,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001845827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803392602] [2023-08-24 09:14:30,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:14:30,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:30,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:30,501 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:30,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 09:14:30,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:14:30,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:30,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:30,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:14:30,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 09:14:30,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803392602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:30,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:30,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-08-24 09:14:30,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082298517] [2023-08-24 09:14:30,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:30,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:14:30,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:14:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:14:30,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:30,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 494 transitions, 7025 flow. Second operand has 21 states, 21 states have (on average 121.04761904761905) internal successors, (2542), 21 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:30,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:30,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:30,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:31,773 INFO L124 PetriNetUnfolderBase]: 2120/3173 cut-off events. [2023-08-24 09:14:31,774 INFO L125 PetriNetUnfolderBase]: For 64162/64179 co-relation queries the response was YES. [2023-08-24 09:14:31,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27911 conditions, 3173 events. 2120/3173 cut-off events. For 64162/64179 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14685 event pairs, 216 based on Foata normal form. 20/3098 useless extension candidates. Maximal degree in co-relation 27838. Up to 1933 conditions per place. [2023-08-24 09:14:31,795 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 362 selfloop transitions, 271 changer transitions 0/664 dead transitions. [2023-08-24 09:14:31,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 664 transitions, 10927 flow [2023-08-24 09:14:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 09:14:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 09:14:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2531 transitions. [2023-08-24 09:14:31,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34671232876712327 [2023-08-24 09:14:31,797 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2531 transitions. [2023-08-24 09:14:31,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2531 transitions. [2023-08-24 09:14:31,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:31,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2531 transitions. [2023-08-24 09:14:31,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 126.55) internal successors, (2531), 20 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:31,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 365.0) internal successors, (7665), 21 states have internal predecessors, (7665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:31,803 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 365.0) internal successors, (7665), 21 states have internal predecessors, (7665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:31,803 INFO L175 Difference]: Start difference. First operand has 232 places, 494 transitions, 7025 flow. Second operand 20 states and 2531 transitions. [2023-08-24 09:14:31,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 664 transitions, 10927 flow [2023-08-24 09:14:31,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 664 transitions, 10214 flow, removed 278 selfloop flow, removed 9 redundant places. [2023-08-24 09:14:31,998 INFO L231 Difference]: Finished difference. Result has 244 places, 534 transitions, 7836 flow [2023-08-24 09:14:31,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7836, PETRI_PLACES=244, PETRI_TRANSITIONS=534} [2023-08-24 09:14:31,998 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 213 predicate places. [2023-08-24 09:14:31,998 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 534 transitions, 7836 flow [2023-08-24 09:14:31,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 121.04761904761905) internal successors, (2542), 21 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:31,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:31,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:32,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:32,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:32,206 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:32,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1545317160, now seen corresponding path program 19 times [2023-08-24 09:14:32,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:32,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671833020] [2023-08-24 09:14:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:32,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:32,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671833020] [2023-08-24 09:14:32,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671833020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382248165] [2023-08-24 09:14:32,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:14:32,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:32,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:32,309 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:32,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 09:14:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:32,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:32,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:32,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:32,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382248165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:32,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:32,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 09:14:32,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956858068] [2023-08-24 09:14:32,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:32,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:14:32,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:14:32,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:14:32,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:32,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 534 transitions, 7836 flow. Second operand has 21 states, 21 states have (on average 121.14285714285714) internal successors, (2544), 21 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:32,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:32,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:32,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:33,471 INFO L124 PetriNetUnfolderBase]: 2106/3141 cut-off events. [2023-08-24 09:14:33,471 INFO L125 PetriNetUnfolderBase]: For 65459/65462 co-relation queries the response was YES. [2023-08-24 09:14:33,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27967 conditions, 3141 events. 2106/3141 cut-off events. For 65459/65462 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14374 event pairs, 476 based on Foata normal form. 14/3056 useless extension candidates. Maximal degree in co-relation 27895. Up to 2287 conditions per place. [2023-08-24 09:14:33,495 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 356 selfloop transitions, 195 changer transitions 0/581 dead transitions. [2023-08-24 09:14:33,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 581 transitions, 9519 flow [2023-08-24 09:14:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 09:14:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 09:14:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1758 transitions. [2023-08-24 09:14:33,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34403131115459884 [2023-08-24 09:14:33,497 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1758 transitions. [2023-08-24 09:14:33,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1758 transitions. [2023-08-24 09:14:33,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:33,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1758 transitions. [2023-08-24 09:14:33,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 125.57142857142857) internal successors, (1758), 14 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:33,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 365.0) internal successors, (5475), 15 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:33,501 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 365.0) internal successors, (5475), 15 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:33,501 INFO L175 Difference]: Start difference. First operand has 244 places, 534 transitions, 7836 flow. Second operand 14 states and 1758 transitions. [2023-08-24 09:14:33,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 581 transitions, 9519 flow [2023-08-24 09:14:33,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 581 transitions, 9003 flow, removed 85 selfloop flow, removed 11 redundant places. [2023-08-24 09:14:33,690 INFO L231 Difference]: Finished difference. Result has 243 places, 525 transitions, 7598 flow [2023-08-24 09:14:33,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=7208, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7598, PETRI_PLACES=243, PETRI_TRANSITIONS=525} [2023-08-24 09:14:33,691 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 212 predicate places. [2023-08-24 09:14:33,691 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 525 transitions, 7598 flow [2023-08-24 09:14:33,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 121.14285714285714) internal successors, (2544), 21 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:33,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:33,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:33,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:33,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 09:14:33,896 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:33,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1054203244, now seen corresponding path program 20 times [2023-08-24 09:14:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:33,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311123087] [2023-08-24 09:14:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:34,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:34,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311123087] [2023-08-24 09:14:34,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311123087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:34,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539250589] [2023-08-24 09:14:34,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:14:34,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:34,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:34,017 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:34,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 09:14:34,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:14:34,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:34,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:34,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:34,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:34,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539250589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:34,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:34,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 09:14:34,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111575775] [2023-08-24 09:14:34,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:34,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:14:34,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:34,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:14:34,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:14:34,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:34,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 525 transitions, 7598 flow. Second operand has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:34,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:34,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:34,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:35,107 INFO L124 PetriNetUnfolderBase]: 2083/3094 cut-off events. [2023-08-24 09:14:35,107 INFO L125 PetriNetUnfolderBase]: For 61708/61711 co-relation queries the response was YES. [2023-08-24 09:14:35,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27192 conditions, 3094 events. 2083/3094 cut-off events. For 61708/61711 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14054 event pairs, 502 based on Foata normal form. 18/3033 useless extension candidates. Maximal degree in co-relation 27120. Up to 2405 conditions per place. [2023-08-24 09:14:35,132 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 372 selfloop transitions, 148 changer transitions 0/549 dead transitions. [2023-08-24 09:14:35,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 549 transitions, 8949 flow [2023-08-24 09:14:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:14:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:14:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1374 transitions. [2023-08-24 09:14:35,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3422166874221669 [2023-08-24 09:14:35,133 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1374 transitions. [2023-08-24 09:14:35,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1374 transitions. [2023-08-24 09:14:35,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:35,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1374 transitions. [2023-08-24 09:14:35,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.9090909090909) internal successors, (1374), 11 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:35,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:35,136 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:35,136 INFO L175 Difference]: Start difference. First operand has 243 places, 525 transitions, 7598 flow. Second operand 11 states and 1374 transitions. [2023-08-24 09:14:35,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 549 transitions, 8949 flow [2023-08-24 09:14:35,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 549 transitions, 8507 flow, removed 32 selfloop flow, removed 13 redundant places. [2023-08-24 09:14:35,336 INFO L231 Difference]: Finished difference. Result has 234 places, 513 transitions, 7292 flow [2023-08-24 09:14:35,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6996, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7292, PETRI_PLACES=234, PETRI_TRANSITIONS=513} [2023-08-24 09:14:35,337 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2023-08-24 09:14:35,337 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 513 transitions, 7292 flow [2023-08-24 09:14:35,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:35,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:35,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:35,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:35,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 09:14:35,540 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:35,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1204345352, now seen corresponding path program 21 times [2023-08-24 09:14:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:35,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666974731] [2023-08-24 09:14:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:35,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:35,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666974731] [2023-08-24 09:14:35,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666974731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:35,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101680820] [2023-08-24 09:14:35,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:14:35,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:35,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:35,646 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:35,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 09:14:35,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:14:35,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:35,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:35,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:35,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:35,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101680820] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:35,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:35,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 09:14:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673989975] [2023-08-24 09:14:35,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:35,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:14:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:14:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:14:35,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:35,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 513 transitions, 7292 flow. Second operand has 21 states, 21 states have (on average 120.95238095238095) internal successors, (2540), 21 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:35,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:35,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:35,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:36,766 INFO L124 PetriNetUnfolderBase]: 2047/3029 cut-off events. [2023-08-24 09:14:36,766 INFO L125 PetriNetUnfolderBase]: For 54413/54413 co-relation queries the response was YES. [2023-08-24 09:14:36,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26222 conditions, 3029 events. 2047/3029 cut-off events. For 54413/54413 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13610 event pairs, 216 based on Foata normal form. 24/2979 useless extension candidates. Maximal degree in co-relation 26151. Up to 1761 conditions per place. [2023-08-24 09:14:36,792 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 334 selfloop transitions, 254 changer transitions 0/616 dead transitions. [2023-08-24 09:14:36,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 616 transitions, 9900 flow [2023-08-24 09:14:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:14:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:14:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2275 transitions. [2023-08-24 09:14:36,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3462709284627093 [2023-08-24 09:14:36,794 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2275 transitions. [2023-08-24 09:14:36,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2275 transitions. [2023-08-24 09:14:36,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:36,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2275 transitions. [2023-08-24 09:14:36,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 126.38888888888889) internal successors, (2275), 18 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:36,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 365.0) internal successors, (6935), 19 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:36,799 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 365.0) internal successors, (6935), 19 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:36,799 INFO L175 Difference]: Start difference. First operand has 234 places, 513 transitions, 7292 flow. Second operand 18 states and 2275 transitions. [2023-08-24 09:14:36,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 616 transitions, 9900 flow [2023-08-24 09:14:36,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 616 transitions, 9569 flow, removed 34 selfloop flow, removed 10 redundant places. [2023-08-24 09:14:36,958 INFO L231 Difference]: Finished difference. Result has 237 places, 502 transitions, 7353 flow [2023-08-24 09:14:36,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6845, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7353, PETRI_PLACES=237, PETRI_TRANSITIONS=502} [2023-08-24 09:14:36,959 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 206 predicate places. [2023-08-24 09:14:36,959 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 502 transitions, 7353 flow [2023-08-24 09:14:36,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 120.95238095238095) internal successors, (2540), 21 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:36,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:36,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:36,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:37,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 09:14:37,163 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:37,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash 655996130, now seen corresponding path program 22 times [2023-08-24 09:14:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:37,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226124600] [2023-08-24 09:14:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:37,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:37,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226124600] [2023-08-24 09:14:37,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226124600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133797302] [2023-08-24 09:14:37,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:14:37,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:37,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:37,271 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:37,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 09:14:37,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:14:37,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:37,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:14:37,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:37,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 09:14:37,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133797302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:14:37,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:14:37,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 09:14:37,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082998444] [2023-08-24 09:14:37,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:14:37,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:14:37,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:14:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:14:37,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:14:37,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 09:14:37,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 502 transitions, 7353 flow. Second operand has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:37,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:14:37,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 09:14:37,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:14:38,269 INFO L124 PetriNetUnfolderBase]: 2028/2994 cut-off events. [2023-08-24 09:14:38,269 INFO L125 PetriNetUnfolderBase]: For 53428/53428 co-relation queries the response was YES. [2023-08-24 09:14:38,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26167 conditions, 2994 events. 2028/2994 cut-off events. For 53428/53428 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13259 event pairs, 464 based on Foata normal form. 14/2934 useless extension candidates. Maximal degree in co-relation 26097. Up to 2203 conditions per place. [2023-08-24 09:14:38,292 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 358 selfloop transitions, 139 changer transitions 0/524 dead transitions. [2023-08-24 09:14:38,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 524 transitions, 8670 flow [2023-08-24 09:14:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:14:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:14:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1373 transitions. [2023-08-24 09:14:38,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34196762141967624 [2023-08-24 09:14:38,294 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1373 transitions. [2023-08-24 09:14:38,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1373 transitions. [2023-08-24 09:14:38,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:14:38,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1373 transitions. [2023-08-24 09:14:38,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.81818181818181) internal successors, (1373), 11 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:38,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:38,297 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:38,297 INFO L175 Difference]: Start difference. First operand has 237 places, 502 transitions, 7353 flow. Second operand 11 states and 1373 transitions. [2023-08-24 09:14:38,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 524 transitions, 8670 flow [2023-08-24 09:14:38,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 524 transitions, 8108 flow, removed 23 selfloop flow, removed 19 redundant places. [2023-08-24 09:14:38,443 INFO L231 Difference]: Finished difference. Result has 225 places, 496 transitions, 7025 flow [2023-08-24 09:14:38,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6747, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7025, PETRI_PLACES=225, PETRI_TRANSITIONS=496} [2023-08-24 09:14:38,444 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 194 predicate places. [2023-08-24 09:14:38,444 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 496 transitions, 7025 flow [2023-08-24 09:14:38,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:14:38,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:14:38,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:14:38,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 09:14:38,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 09:14:38,645 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:14:38,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:14:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash 98513679, now seen corresponding path program 5 times [2023-08-24 09:14:38,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:14:38,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570272676] [2023-08-24 09:14:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:14:38,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:14:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:14:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:39,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:14:39,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570272676] [2023-08-24 09:14:39,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570272676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:14:39,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5079139] [2023-08-24 09:14:39,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:14:39,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:14:39,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:14:39,954 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:14:39,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 09:14:40,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:14:40,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:14:40,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 105 conjunts are in the unsatisfiable core [2023-08-24 09:14:40,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:14:40,136 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 105 treesize of output 101 [2023-08-24 09:14:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:14:40,559 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:14:40,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-24 09:14:40,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:14:40,619 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:14:40,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-24 09:14:40,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:14:40,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:14:40,834 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 09:14:40,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 37 [2023-08-24 09:14:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:14:40,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:14:41,134 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int))) (or (<= c_~res1~0 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse0 (select .cse3 c_~B~0.base)) (.cse1 (* ~M~0 4)) (.cse2 (select .cse3 c_~A~0.base))) (+ (select .cse0 (+ .cse1 c_~B~0.offset)) (select .cse0 c_~B~0.offset) c_~res2~0 (select .cse2 (+ c_~A~0.offset .cse1)) (select .cse2 c_~A~0.offset))))) (<= c_~N~0 ~M~0) (<= ~M~0 0))) (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int))) (or (< (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse4 (select .cse7 c_~B~0.base)) (.cse5 (* ~M~0 4)) (.cse6 (select .cse7 c_~A~0.base))) (+ (select .cse4 (+ .cse5 c_~B~0.offset)) (select .cse4 c_~B~0.offset) c_~res2~0 (select .cse6 (+ c_~A~0.offset .cse5)) (select .cse6 c_~A~0.offset)))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (<= ~M~0 0)))) is different from false [2023-08-24 09:14:41,178 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int)) (v_ArrVal_1595 (Array Int Int))) (or (< (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1595) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse1 (select .cse3 c_~B~0.base)) (.cse0 (select .cse3 c_~A~0.base)) (.cse2 (* ~M~0 4))) (+ (select .cse0 c_~A~0.offset) (select .cse1 (+ .cse2 c_~B~0.offset)) (select .cse1 c_~B~0.offset) c_~res2~0 (select .cse0 (+ c_~A~0.offset .cse2))))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (<= ~M~0 0))) (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int)) (v_ArrVal_1595 (Array Int Int))) (or (<= c_~res1~0 (let ((.cse7 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1595) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse5 (select .cse7 c_~B~0.base)) (.cse4 (select .cse7 c_~A~0.base)) (.cse6 (* ~M~0 4))) (+ (select .cse4 c_~A~0.offset) (select .cse5 (+ .cse6 c_~B~0.offset)) (select .cse5 c_~B~0.offset) c_~res2~0 (select .cse4 (+ c_~A~0.offset .cse6)))))) (<= c_~N~0 ~M~0) (<= ~M~0 0)))) is different from false [2023-08-24 09:14:41,202 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse4 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse10))) (.cse5 (select (select |c_#memory_int| c_~B~0.base) (+ .cse10 c_~B~0.offset)))) (and (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int)) (v_ArrVal_1595 (Array Int Int))) (or (< (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1595) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse1 (select .cse3 c_~B~0.base)) (.cse0 (select .cse3 c_~A~0.base)) (.cse2 (* ~M~0 4))) (+ (select .cse0 c_~A~0.offset) (select .cse1 (+ .cse2 c_~B~0.offset)) (select .cse1 c_~B~0.offset) c_~res2~0 (select .cse0 (+ c_~A~0.offset .cse2))))) (+ .cse4 .cse5 c_~res1~0 1)) (<= c_~N~0 ~M~0) (<= ~M~0 0))) (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int)) (v_ArrVal_1595 (Array Int Int))) (or (<= c_~N~0 ~M~0) (<= ~M~0 0) (<= (+ .cse4 .cse5 c_~res1~0) (let ((.cse9 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1595) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse7 (select .cse9 c_~B~0.base)) (.cse6 (select .cse9 c_~A~0.base)) (.cse8 (* ~M~0 4))) (+ (select .cse6 c_~A~0.offset) (select .cse7 (+ .cse8 c_~B~0.offset)) (select .cse7 c_~B~0.offset) c_~res2~0 (select .cse6 (+ c_~A~0.offset .cse8))))))))))) is different from false [2023-08-24 09:14:41,541 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 09:14:41,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 4790 treesize of output 2542 [2023-08-24 09:14:41,581 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:14:41,583 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:14:41,604 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:14:41,604 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 550 treesize of output 526 [2023-08-24 09:14:41,627 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:14:41,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:14:41,654 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:14:41,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 486 treesize of output 398 [2023-08-24 09:15:03,041 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:15:03,042 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:15:03,042 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:15:03,042 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:15:03,142 INFO L322 Elim1Store]: treesize reduction 248, result has 24.6 percent of original size [2023-08-24 09:15:03,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 95 [2023-08-24 09:15:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-24 09:15:03,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5079139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:15:03,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:15:03,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 41 [2023-08-24 09:15:03,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936166700] [2023-08-24 09:15:03,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:15:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 09:15:03,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:15:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 09:15:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1412, Unknown=3, NotChecked=234, Total=1806 [2023-08-24 09:15:03,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 365 [2023-08-24 09:15:03,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 496 transitions, 7025 flow. Second operand has 43 states, 43 states have (on average 83.67441860465117) internal successors, (3598), 43 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:03,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:15:03,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 365 [2023-08-24 09:15:03,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:15:08,261 INFO L124 PetriNetUnfolderBase]: 3530/5199 cut-off events. [2023-08-24 09:15:08,261 INFO L125 PetriNetUnfolderBase]: For 92034/92034 co-relation queries the response was YES. [2023-08-24 09:15:08,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46418 conditions, 5199 events. 3530/5199 cut-off events. For 92034/92034 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25514 event pairs, 221 based on Foata normal form. 2/5119 useless extension candidates. Maximal degree in co-relation 46350. Up to 3496 conditions per place. [2023-08-24 09:15:08,301 INFO L140 encePairwiseOnDemand]: 349/365 looper letters, 679 selfloop transitions, 382 changer transitions 1/1062 dead transitions. [2023-08-24 09:15:08,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1062 transitions, 17831 flow [2023-08-24 09:15:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 09:15:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 09:15:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3334 transitions. [2023-08-24 09:15:08,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2468715290633099 [2023-08-24 09:15:08,304 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3334 transitions. [2023-08-24 09:15:08,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3334 transitions. [2023-08-24 09:15:08,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:15:08,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3334 transitions. [2023-08-24 09:15:08,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 90.10810810810811) internal successors, (3334), 37 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:08,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 365.0) internal successors, (13870), 38 states have internal predecessors, (13870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:08,312 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 365.0) internal successors, (13870), 38 states have internal predecessors, (13870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:08,312 INFO L175 Difference]: Start difference. First operand has 225 places, 496 transitions, 7025 flow. Second operand 37 states and 3334 transitions. [2023-08-24 09:15:08,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1062 transitions, 17831 flow [2023-08-24 09:15:08,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1062 transitions, 17139 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-24 09:15:08,685 INFO L231 Difference]: Finished difference. Result has 267 places, 839 transitions, 14149 flow [2023-08-24 09:15:08,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6747, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14149, PETRI_PLACES=267, PETRI_TRANSITIONS=839} [2023-08-24 09:15:08,685 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 236 predicate places. [2023-08-24 09:15:08,685 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 839 transitions, 14149 flow [2023-08-24 09:15:08,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 83.67441860465117) internal successors, (3598), 43 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:08,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:15:08,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:15:08,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 09:15:08,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:15:08,886 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:15:08,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:15:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1669165277, now seen corresponding path program 6 times [2023-08-24 09:15:08,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:15:08,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012297612] [2023-08-24 09:15:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:15:08,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:15:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:15:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:15:09,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:15:09,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012297612] [2023-08-24 09:15:09,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012297612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:15:09,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516621409] [2023-08-24 09:15:09,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:15:09,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:15:09,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:15:09,684 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:15:09,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 09:15:09,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:15:09,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:15:09,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 09:15:09,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:15:10,286 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:15:10,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:15:10,306 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 09:15:10,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2023-08-24 09:15:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:15:10,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:15:10,813 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 09:15:10,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 326 [2023-08-24 09:15:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:15:19,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516621409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:15:19,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:15:19,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 30 [2023-08-24 09:15:19,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493488224] [2023-08-24 09:15:19,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:15:19,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 09:15:19,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:15:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 09:15:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-08-24 09:15:19,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 09:15:19,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 839 transitions, 14149 flow. Second operand has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:19,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:15:19,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 09:15:19,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:15:23,042 INFO L124 PetriNetUnfolderBase]: 5427/7870 cut-off events. [2023-08-24 09:15:23,043 INFO L125 PetriNetUnfolderBase]: For 193636/193636 co-relation queries the response was YES. [2023-08-24 09:15:23,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77818 conditions, 7870 events. 5427/7870 cut-off events. For 193636/193636 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 40312 event pairs, 440 based on Foata normal form. 2/7848 useless extension candidates. Maximal degree in co-relation 77734. Up to 5647 conditions per place. [2023-08-24 09:15:23,119 INFO L140 encePairwiseOnDemand]: 349/365 looper letters, 892 selfloop transitions, 588 changer transitions 1/1481 dead transitions. [2023-08-24 09:15:23,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1481 transitions, 28191 flow [2023-08-24 09:15:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 09:15:23,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 09:15:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3955 transitions. [2023-08-24 09:15:23,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28514780100937276 [2023-08-24 09:15:23,122 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3955 transitions. [2023-08-24 09:15:23,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3955 transitions. [2023-08-24 09:15:23,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:15:23,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3955 transitions. [2023-08-24 09:15:23,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 104.07894736842105) internal successors, (3955), 38 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:23,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 365.0) internal successors, (14235), 39 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:23,130 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 365.0) internal successors, (14235), 39 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:23,130 INFO L175 Difference]: Start difference. First operand has 267 places, 839 transitions, 14149 flow. Second operand 38 states and 3955 transitions. [2023-08-24 09:15:23,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1481 transitions, 28191 flow [2023-08-24 09:15:24,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1481 transitions, 25855 flow, removed 1160 selfloop flow, removed 5 redundant places. [2023-08-24 09:15:24,230 INFO L231 Difference]: Finished difference. Result has 321 places, 1258 transitions, 22571 flow [2023-08-24 09:15:24,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=12743, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=22571, PETRI_PLACES=321, PETRI_TRANSITIONS=1258} [2023-08-24 09:15:24,231 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 290 predicate places. [2023-08-24 09:15:24,231 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 1258 transitions, 22571 flow [2023-08-24 09:15:24,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:15:24,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:15:24,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:15:24,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 09:15:24,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:15:24,437 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:15:24,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:15:24,437 INFO L85 PathProgramCache]: Analyzing trace with hash -991842973, now seen corresponding path program 7 times [2023-08-24 09:15:24,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:15:24,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786293266] [2023-08-24 09:15:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:15:24,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:15:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:15:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:15:26,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:15:26,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786293266] [2023-08-24 09:15:26,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786293266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:15:26,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540020615] [2023-08-24 09:15:26,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:15:26,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:15:26,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:15:26,044 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:15:26,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 09:15:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:15:26,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 09:15:26,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:15:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:15:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:15:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:15:26,242 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-24 09:15:26,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 09:15:26,358 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 [2023-08-24 09:15:26,400 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 09:15:26,400 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 11 treesize of output 11 [2023-08-24 09:15:26,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:15:26,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 09:15:26,518 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 6 treesize of output 5 [2023-08-24 09:15:26,576 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 6 treesize of output 5 [2023-08-24 09:15:26,638 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 6 treesize of output 5 [2023-08-24 09:15:26,982 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:15:26,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:15:27,004 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 09:15:27,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 37 [2023-08-24 09:15:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:15:27,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:15:47,969 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:15:47,969 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 129 treesize of output 94 [2023-08-24 09:15:48,063 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:15:48,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9306102 treesize of output 8912954 [2023-08-24 09:15:48,483 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:15:48,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 8694 treesize of output 8238 [2023-08-24 09:15:48,592 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:15:48,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 8182 treesize of output 7982 [2023-08-24 09:15:48,709 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:15:48,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 7926 treesize of output 6958 [2023-08-24 09:15:48,828 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:15:48,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6902 treesize of output 4910 [2023-08-24 09:19:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:19:22,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540020615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:19:22,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:19:22,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 45 [2023-08-24 09:19:22,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722696616] [2023-08-24 09:19:22,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:19:22,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-24 09:19:22,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:19:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-24 09:19:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1911, Unknown=50, NotChecked=0, Total=2162 [2023-08-24 09:19:22,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 365 [2023-08-24 09:19:22,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1258 transitions, 22571 flow. Second operand has 47 states, 47 states have (on average 83.63829787234043) internal successors, (3931), 47 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:22,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:19:22,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 365 [2023-08-24 09:19:22,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:19:26,855 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] [2023-08-24 09:19:28,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:19:31,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:19:34,054 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] [2023-08-24 09:19:37,873 INFO L124 PetriNetUnfolderBase]: 6877/10001 cut-off events. [2023-08-24 09:19:37,873 INFO L125 PetriNetUnfolderBase]: For 242542/242542 co-relation queries the response was YES. [2023-08-24 09:19:37,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97329 conditions, 10001 events. 6877/10001 cut-off events. For 242542/242542 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 54022 event pairs, 629 based on Foata normal form. 2/9979 useless extension candidates. Maximal degree in co-relation 97223. Up to 7336 conditions per place. [2023-08-24 09:19:38,114 INFO L140 encePairwiseOnDemand]: 347/365 looper letters, 1190 selfloop transitions, 623 changer transitions 1/1814 dead transitions. [2023-08-24 09:19:38,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1814 transitions, 34944 flow [2023-08-24 09:19:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 09:19:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 09:19:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3949 transitions. [2023-08-24 09:19:38,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2458904109589041 [2023-08-24 09:19:38,118 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3949 transitions. [2023-08-24 09:19:38,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3949 transitions. [2023-08-24 09:19:38,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:19:38,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3949 transitions. [2023-08-24 09:19:38,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 89.75) internal successors, (3949), 44 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:38,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 365.0) internal successors, (16425), 45 states have internal predecessors, (16425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:38,127 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 365.0) internal successors, (16425), 45 states have internal predecessors, (16425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:38,127 INFO L175 Difference]: Start difference. First operand has 321 places, 1258 transitions, 22571 flow. Second operand 44 states and 3949 transitions. [2023-08-24 09:19:38,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1814 transitions, 34944 flow [2023-08-24 09:19:40,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1814 transitions, 33091 flow, removed 915 selfloop flow, removed 9 redundant places. [2023-08-24 09:19:40,028 INFO L231 Difference]: Finished difference. Result has 369 places, 1548 transitions, 27903 flow [2023-08-24 09:19:40,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=20868, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=27903, PETRI_PLACES=369, PETRI_TRANSITIONS=1548} [2023-08-24 09:19:40,029 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 338 predicate places. [2023-08-24 09:19:40,029 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1548 transitions, 27903 flow [2023-08-24 09:19:40,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 83.63829787234043) internal successors, (3931), 47 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:40,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:19:40,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:19:40,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 09:19:40,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-24 09:19:40,230 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:19:40,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:19:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1299037899, now seen corresponding path program 8 times [2023-08-24 09:19:40,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:19:40,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782563638] [2023-08-24 09:19:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:19:40,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:19:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:19:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:19:40,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:19:40,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782563638] [2023-08-24 09:19:40,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782563638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:19:40,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034333240] [2023-08-24 09:19:40,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:19:40,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:19:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:19:40,961 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:19:40,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 09:19:41,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:19:41,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:19:41,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 09:19:41,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:19:41,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:19:41,534 INFO L322 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2023-08-24 09:19:41,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 55 [2023-08-24 09:19:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:19:41,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:19:42,345 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 09:19:42,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 327 [2023-08-24 09:19:46,231 INFO L322 Elim1Store]: treesize reduction 47, result has 35.6 percent of original size [2023-08-24 09:19:46,231 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2023-08-24 09:19:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:19:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034333240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:19:46,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:19:46,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 35 [2023-08-24 09:19:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406642293] [2023-08-24 09:19:46,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:19:46,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 09:19:46,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:19:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 09:19:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 09:19:46,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 09:19:46,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1548 transitions, 27903 flow. Second operand has 37 states, 37 states have (on average 98.02702702702703) internal successors, (3627), 37 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:46,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:19:46,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 09:19:46,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:19:51,504 INFO L124 PetriNetUnfolderBase]: 7457/10851 cut-off events. [2023-08-24 09:19:51,504 INFO L125 PetriNetUnfolderBase]: For 284990/284990 co-relation queries the response was YES. [2023-08-24 09:19:51,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107952 conditions, 10851 events. 7457/10851 cut-off events. For 284990/284990 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 59412 event pairs, 591 based on Foata normal form. 1/10828 useless extension candidates. Maximal degree in co-relation 107831. Up to 8726 conditions per place. [2023-08-24 09:19:51,606 INFO L140 encePairwiseOnDemand]: 350/365 looper letters, 1241 selfloop transitions, 600 changer transitions 1/1842 dead transitions. [2023-08-24 09:19:51,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1842 transitions, 36783 flow [2023-08-24 09:19:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:19:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:19:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2828 transitions. [2023-08-24 09:19:51,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.286960933536276 [2023-08-24 09:19:51,609 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2828 transitions. [2023-08-24 09:19:51,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2828 transitions. [2023-08-24 09:19:51,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:19:51,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2828 transitions. [2023-08-24 09:19:51,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 104.74074074074075) internal successors, (2828), 27 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:51,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 365.0) internal successors, (10220), 28 states have internal predecessors, (10220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:51,615 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 365.0) internal successors, (10220), 28 states have internal predecessors, (10220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:51,615 INFO L175 Difference]: Start difference. First operand has 369 places, 1548 transitions, 27903 flow. Second operand 27 states and 2828 transitions. [2023-08-24 09:19:51,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1842 transitions, 36783 flow [2023-08-24 09:19:54,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1842 transitions, 35180 flow, removed 684 selfloop flow, removed 16 redundant places. [2023-08-24 09:19:54,257 INFO L231 Difference]: Finished difference. Result has 388 places, 1670 transitions, 30654 flow [2023-08-24 09:19:54,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=26300, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=30654, PETRI_PLACES=388, PETRI_TRANSITIONS=1670} [2023-08-24 09:19:54,258 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 357 predicate places. [2023-08-24 09:19:54,258 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1670 transitions, 30654 flow [2023-08-24 09:19:54,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 98.02702702702703) internal successors, (3627), 37 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:19:54,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:19:54,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:19:54,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 09:19:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:19:54,464 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:19:54,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:19:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2085320665, now seen corresponding path program 9 times [2023-08-24 09:19:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:19:54,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372047906] [2023-08-24 09:19:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:19:54,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:19:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:19:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:19:55,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:19:55,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372047906] [2023-08-24 09:19:55,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372047906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:19:55,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392921341] [2023-08-24 09:19:55,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:19:55,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:19:55,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:19:55,611 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:19:55,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 09:19:55,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:19:55,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:19:55,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 09:19:55,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:19:56,523 INFO L322 Elim1Store]: treesize reduction 48, result has 54.3 percent of original size [2023-08-24 09:19:56,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 71 [2023-08-24 09:19:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:19:56,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:19:57,099 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:19:57,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 342 [2023-08-24 09:20:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:20:15,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392921341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:20:15,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:20:15,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 43 [2023-08-24 09:20:15,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57488467] [2023-08-24 09:20:15,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:20:15,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 09:20:15,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:20:15,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 09:20:15,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2023-08-24 09:20:15,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 09:20:15,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1670 transitions, 30654 flow. Second operand has 45 states, 45 states have (on average 86.75555555555556) internal successors, (3904), 45 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:15,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:20:15,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 09:20:15,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:20:22,470 INFO L124 PetriNetUnfolderBase]: 8656/12642 cut-off events. [2023-08-24 09:20:22,471 INFO L125 PetriNetUnfolderBase]: For 353777/353777 co-relation queries the response was YES. [2023-08-24 09:20:22,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127293 conditions, 12642 events. 8656/12642 cut-off events. For 353777/353777 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 71181 event pairs, 760 based on Foata normal form. 3/12621 useless extension candidates. Maximal degree in co-relation 127162. Up to 10082 conditions per place. [2023-08-24 09:20:22,607 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 1470 selfloop transitions, 727 changer transitions 6/2203 dead transitions. [2023-08-24 09:20:22,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 2203 transitions, 44206 flow [2023-08-24 09:20:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 09:20:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 09:20:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3722 transitions. [2023-08-24 09:20:22,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2549315068493151 [2023-08-24 09:20:22,610 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3722 transitions. [2023-08-24 09:20:22,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3722 transitions. [2023-08-24 09:20:22,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:20:22,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3722 transitions. [2023-08-24 09:20:22,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 93.05) internal successors, (3722), 40 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:22,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 365.0) internal successors, (14965), 41 states have internal predecessors, (14965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:22,618 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 365.0) internal successors, (14965), 41 states have internal predecessors, (14965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:22,618 INFO L175 Difference]: Start difference. First operand has 388 places, 1670 transitions, 30654 flow. Second operand 40 states and 3722 transitions. [2023-08-24 09:20:22,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 2203 transitions, 44206 flow [2023-08-24 09:20:26,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 2203 transitions, 42627 flow, removed 505 selfloop flow, removed 9 redundant places. [2023-08-24 09:20:26,349 INFO L231 Difference]: Finished difference. Result has 432 places, 1956 transitions, 37641 flow [2023-08-24 09:20:26,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=29327, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=37641, PETRI_PLACES=432, PETRI_TRANSITIONS=1956} [2023-08-24 09:20:26,350 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 401 predicate places. [2023-08-24 09:20:26,350 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1956 transitions, 37641 flow [2023-08-24 09:20:26,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 86.75555555555556) internal successors, (3904), 45 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:26,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:20:26,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:20:26,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 09:20:26,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:20:26,551 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:20:26,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:20:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash 786262175, now seen corresponding path program 10 times [2023-08-24 09:20:26,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:20:26,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267919001] [2023-08-24 09:20:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:20:26,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:20:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:20:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:20:27,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:20:27,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267919001] [2023-08-24 09:20:27,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267919001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:20:27,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117485783] [2023-08-24 09:20:27,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:20:27,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:20:27,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:20:27,282 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:20:27,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 09:20:27,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:20:27,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:20:27,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 09:20:27,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:20:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:20:27,858 INFO L322 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2023-08-24 09:20:27,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 55 [2023-08-24 09:20:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:20:27,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:20:28,732 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 09:20:28,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 327 [2023-08-24 09:20:36,460 INFO L322 Elim1Store]: treesize reduction 47, result has 35.6 percent of original size [2023-08-24 09:20:36,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2023-08-24 09:20:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:20:36,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117485783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:20:36,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:20:36,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 35 [2023-08-24 09:20:36,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195390970] [2023-08-24 09:20:36,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:20:36,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 09:20:36,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:20:36,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 09:20:36,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 09:20:36,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 09:20:36,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1956 transitions, 37641 flow. Second operand has 37 states, 37 states have (on average 98.08108108108108) internal successors, (3629), 37 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:36,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:20:36,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 09:20:36,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:20:43,499 INFO L124 PetriNetUnfolderBase]: 9142/13306 cut-off events. [2023-08-24 09:20:43,499 INFO L125 PetriNetUnfolderBase]: For 386706/386706 co-relation queries the response was YES. [2023-08-24 09:20:43,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138444 conditions, 13306 events. 9142/13306 cut-off events. For 386706/386706 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 74833 event pairs, 735 based on Foata normal form. 2/13284 useless extension candidates. Maximal degree in co-relation 138298. Up to 10267 conditions per place. [2023-08-24 09:20:43,639 INFO L140 encePairwiseOnDemand]: 349/365 looper letters, 1364 selfloop transitions, 859 changer transitions 1/2224 dead transitions. [2023-08-24 09:20:43,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 2224 transitions, 46813 flow [2023-08-24 09:20:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 09:20:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 09:20:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3036 transitions. [2023-08-24 09:20:43,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2868209730751063 [2023-08-24 09:20:43,642 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3036 transitions. [2023-08-24 09:20:43,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3036 transitions. [2023-08-24 09:20:43,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:20:43,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3036 transitions. [2023-08-24 09:20:43,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 104.6896551724138) internal successors, (3036), 29 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:43,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 365.0) internal successors, (10950), 30 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:43,648 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 365.0) internal successors, (10950), 30 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:43,648 INFO L175 Difference]: Start difference. First operand has 432 places, 1956 transitions, 37641 flow. Second operand 29 states and 3036 transitions. [2023-08-24 09:20:43,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 2224 transitions, 46813 flow [2023-08-24 09:20:47,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 2224 transitions, 45885 flow, removed 294 selfloop flow, removed 17 redundant places. [2023-08-24 09:20:47,735 INFO L231 Difference]: Finished difference. Result has 453 places, 2055 transitions, 41234 flow [2023-08-24 09:20:47,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=36779, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=772, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=41234, PETRI_PLACES=453, PETRI_TRANSITIONS=2055} [2023-08-24 09:20:47,736 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 422 predicate places. [2023-08-24 09:20:47,736 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 2055 transitions, 41234 flow [2023-08-24 09:20:47,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 98.08108108108108) internal successors, (3629), 37 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:47,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:20:47,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:20:47,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 09:20:47,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 09:20:47,941 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:20:47,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:20:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash 63888127, now seen corresponding path program 23 times [2023-08-24 09:20:47,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:20:47,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342334690] [2023-08-24 09:20:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:20:47,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:20:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:20:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:20:49,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:20:49,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342334690] [2023-08-24 09:20:49,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342334690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:20:49,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173859536] [2023-08-24 09:20:49,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:20:49,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:20:49,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:20:49,485 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:20:49,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 09:20:49,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:20:49,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:20:49,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 09:20:49,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:20:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:20:50,266 INFO L322 Elim1Store]: treesize reduction 72, result has 52.9 percent of original size [2023-08-24 09:20:50,267 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 59 treesize of output 95 [2023-08-24 09:20:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:20:50,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:20:51,037 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:20:51,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 338 [2023-08-24 09:20:55,029 INFO L322 Elim1Store]: treesize reduction 237, result has 27.1 percent of original size [2023-08-24 09:20:55,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 102 [2023-08-24 09:20:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:20:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173859536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:20:55,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:20:55,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 38 [2023-08-24 09:20:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664629857] [2023-08-24 09:20:55,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:20:55,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 09:20:55,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:20:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 09:20:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2023-08-24 09:20:55,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 365 [2023-08-24 09:20:55,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 2055 transitions, 41234 flow. Second operand has 40 states, 40 states have (on average 84.025) internal successors, (3361), 40 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:20:55,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:20:55,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 365 [2023-08-24 09:20:55,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:21:05,151 INFO L124 PetriNetUnfolderBase]: 10396/15316 cut-off events. [2023-08-24 09:21:05,151 INFO L125 PetriNetUnfolderBase]: For 485356/485356 co-relation queries the response was YES. [2023-08-24 09:21:05,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164096 conditions, 15316 events. 10396/15316 cut-off events. For 485356/485356 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 90407 event pairs, 809 based on Foata normal form. 4/15296 useless extension candidates. Maximal degree in co-relation 163941. Up to 8993 conditions per place. [2023-08-24 09:21:05,336 INFO L140 encePairwiseOnDemand]: 347/365 looper letters, 1298 selfloop transitions, 1319 changer transitions 9/2626 dead transitions. [2023-08-24 09:21:05,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 2626 transitions, 57682 flow [2023-08-24 09:21:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 09:21:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 09:21:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3604 transitions. [2023-08-24 09:21:05,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24684931506849314 [2023-08-24 09:21:05,339 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3604 transitions. [2023-08-24 09:21:05,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3604 transitions. [2023-08-24 09:21:05,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:21:05,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3604 transitions. [2023-08-24 09:21:05,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 90.1) internal successors, (3604), 40 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:21:05,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 365.0) internal successors, (14965), 41 states have internal predecessors, (14965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:21:05,347 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 365.0) internal successors, (14965), 41 states have internal predecessors, (14965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:21:05,348 INFO L175 Difference]: Start difference. First operand has 453 places, 2055 transitions, 41234 flow. Second operand 40 states and 3604 transitions. [2023-08-24 09:21:05,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 2626 transitions, 57682 flow [2023-08-24 09:21:11,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 2626 transitions, 56362 flow, removed 380 selfloop flow, removed 12 redundant places. [2023-08-24 09:21:11,199 INFO L231 Difference]: Finished difference. Result has 494 places, 2349 transitions, 51252 flow [2023-08-24 09:21:11,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=40018, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=901, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=51252, PETRI_PLACES=494, PETRI_TRANSITIONS=2349} [2023-08-24 09:21:11,201 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 463 predicate places. [2023-08-24 09:21:11,201 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 2349 transitions, 51252 flow [2023-08-24 09:21:11,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 84.025) internal successors, (3361), 40 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:21:11,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:21:11,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:21:11,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 09:21:11,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 09:21:11,402 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:21:11,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:21:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1123629947, now seen corresponding path program 11 times [2023-08-24 09:21:11,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:21:11,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488875033] [2023-08-24 09:21:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:21:11,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:21:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:21:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:21:12,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:21:12,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488875033] [2023-08-24 09:21:12,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488875033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:21:12,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483608595] [2023-08-24 09:21:12,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:21:12,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:21:12,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:21:12,764 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:21:12,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 09:21:12,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:21:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:21:12,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 96 conjunts are in the unsatisfiable core [2023-08-24 09:21:12,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:21:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:21:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:21:13,391 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:21:13,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-24 09:21:13,635 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:21:13,655 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 09:21:13,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 37 [2023-08-24 09:21:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:21:13,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:21:14,020 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_thread3Thread1of1ForFork2_~i~2#1_188| Int) (v_ArrVal_2028 (Array Int Int))) (or (<= c_~N~0 |v_thread3Thread1of1ForFork2_~i~2#1_188|) (< (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2028))) (let ((.cse2 (select .cse3 c_~B~0.base)) (.cse1 (* |v_thread3Thread1of1ForFork2_~i~2#1_188| 4)) (.cse0 (select .cse3 c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) (select .cse2 c_~B~0.offset) (select .cse2 (+ .cse1 c_~B~0.offset)) c_~res2~0 (select .cse0 c_~A~0.offset)))) (+ c_~res1~0 1)) (< |v_thread3Thread1of1ForFork2_~i~2#1_188| 1))) (forall ((|v_thread3Thread1of1ForFork2_~i~2#1_188| Int) (v_ArrVal_2028 (Array Int Int))) (or (<= c_~res1~0 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2028))) (let ((.cse6 (select .cse7 c_~B~0.base)) (.cse5 (* |v_thread3Thread1of1ForFork2_~i~2#1_188| 4)) (.cse4 (select .cse7 c_~A~0.base))) (+ (select .cse4 (+ c_~A~0.offset .cse5)) (select .cse6 c_~B~0.offset) (select .cse6 (+ .cse5 c_~B~0.offset)) c_~res2~0 (select .cse4 c_~A~0.offset))))) (<= c_~N~0 |v_thread3Thread1of1ForFork2_~i~2#1_188|) (< |v_thread3Thread1of1ForFork2_~i~2#1_188| 1)))) is different from false [2023-08-24 09:21:14,054 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse4 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse10))) (.cse5 (select (select |c_#memory_int| c_~B~0.base) (+ .cse10 c_~B~0.offset)))) (and (forall ((|v_thread3Thread1of1ForFork2_~i~2#1_188| Int) (v_ArrVal_2028 (Array Int Int))) (or (<= c_~N~0 |v_thread3Thread1of1ForFork2_~i~2#1_188|) (< (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2028))) (let ((.cse2 (select .cse3 c_~B~0.base)) (.cse1 (* |v_thread3Thread1of1ForFork2_~i~2#1_188| 4)) (.cse0 (select .cse3 c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) (select .cse2 c_~B~0.offset) (select .cse2 (+ .cse1 c_~B~0.offset)) c_~res2~0 (select .cse0 c_~A~0.offset)))) (+ .cse4 .cse5 c_~res1~0 1)) (< |v_thread3Thread1of1ForFork2_~i~2#1_188| 1))) (forall ((|v_thread3Thread1of1ForFork2_~i~2#1_188| Int) (v_ArrVal_2028 (Array Int Int))) (or (<= (+ .cse4 .cse5 c_~res1~0) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2028))) (let ((.cse8 (select .cse9 c_~B~0.base)) (.cse7 (* |v_thread3Thread1of1ForFork2_~i~2#1_188| 4)) (.cse6 (select .cse9 c_~A~0.base))) (+ (select .cse6 (+ c_~A~0.offset .cse7)) (select .cse8 c_~B~0.offset) (select .cse8 (+ .cse7 c_~B~0.offset)) c_~res2~0 (select .cse6 c_~A~0.offset))))) (<= c_~N~0 |v_thread3Thread1of1ForFork2_~i~2#1_188|) (< |v_thread3Thread1of1ForFork2_~i~2#1_188| 1)))))) is different from false [2023-08-24 09:21:14,390 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 09:21:14,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 298 treesize of output 426 [2023-08-24 09:21:14,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:21:14,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:21:14,427 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:21:14,427 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 122 [2023-08-24 09:21:34,644 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:21:34,645 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:21:34,748 INFO L322 Elim1Store]: treesize reduction 258, result has 21.6 percent of original size [2023-08-24 09:21:34,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 85 [2023-08-24 09:21:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-08-24 09:21:35,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483608595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:21:35,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:21:35,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 41 [2023-08-24 09:21:35,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141156588] [2023-08-24 09:21:35,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:21:35,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 09:21:35,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:21:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 09:21:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1486, Unknown=2, NotChecked=158, Total=1806 [2023-08-24 09:21:35,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 09:21:35,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 2349 transitions, 51252 flow. Second operand has 43 states, 43 states have (on average 86.72093023255815) internal successors, (3729), 43 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:21:35,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:21:35,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 09:21:35,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:21:41,827 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] [2023-08-24 09:21:43,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:21:45,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:21:48,162 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] [2023-08-24 09:21:55,261 INFO L124 PetriNetUnfolderBase]: 11570/16979 cut-off events. [2023-08-24 09:21:55,261 INFO L125 PetriNetUnfolderBase]: For 638937/638937 co-relation queries the response was YES. [2023-08-24 09:21:55,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193102 conditions, 16979 events. 11570/16979 cut-off events. For 638937/638937 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 101203 event pairs, 1011 based on Foata normal form. 2/16957 useless extension candidates. Maximal degree in co-relation 192932. Up to 13376 conditions per place. [2023-08-24 09:21:55,472 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 1930 selfloop transitions, 799 changer transitions 1/2730 dead transitions. [2023-08-24 09:21:55,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2730 transitions, 63803 flow [2023-08-24 09:21:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:21:55,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:21:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2601 transitions. [2023-08-24 09:21:55,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2545009784735812 [2023-08-24 09:21:55,474 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2601 transitions. [2023-08-24 09:21:55,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2601 transitions. [2023-08-24 09:21:55,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:21:55,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2601 transitions. [2023-08-24 09:21:55,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 92.89285714285714) internal successors, (2601), 28 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:21:55,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 365.0) internal successors, (10585), 29 states have internal predecessors, (10585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:21:55,481 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 365.0) internal successors, (10585), 29 states have internal predecessors, (10585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:21:55,481 INFO L175 Difference]: Start difference. First operand has 494 places, 2349 transitions, 51252 flow. Second operand 28 states and 2601 transitions. [2023-08-24 09:21:55,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2730 transitions, 63803 flow [2023-08-24 09:22:03,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 2730 transitions, 60350 flow, removed 1350 selfloop flow, removed 19 redundant places. [2023-08-24 09:22:03,723 INFO L231 Difference]: Finished difference. Result has 516 places, 2573 transitions, 55677 flow [2023-08-24 09:22:03,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=48065, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=55677, PETRI_PLACES=516, PETRI_TRANSITIONS=2573} [2023-08-24 09:22:03,724 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 485 predicate places. [2023-08-24 09:22:03,724 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 2573 transitions, 55677 flow [2023-08-24 09:22:03,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 86.72093023255815) internal successors, (3729), 43 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:22:03,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:22:03,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:22:03,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 09:22:03,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 09:22:03,925 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:22:03,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:22:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1987755631, now seen corresponding path program 12 times [2023-08-24 09:22:03,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:22:03,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841024400] [2023-08-24 09:22:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:22:03,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:22:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:22:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:22:04,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:22:04,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841024400] [2023-08-24 09:22:04,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841024400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:22:04,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934442328] [2023-08-24 09:22:04,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:22:04,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:22:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:22:04,655 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:22:04,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 09:22:04,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:22:04,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:22:04,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 100 conjunts are in the unsatisfiable core [2023-08-24 09:22:04,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:22:05,033 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 [2023-08-24 09:22:05,083 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 6 treesize of output 5 [2023-08-24 09:22:05,120 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 6 treesize of output 5 [2023-08-24 09:22:05,173 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 6 treesize of output 5 [2023-08-24 09:22:05,514 INFO L322 Elim1Store]: treesize reduction 48, result has 54.3 percent of original size [2023-08-24 09:22:05,515 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 78 [2023-08-24 09:22:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:22:05,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:22:10,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:22:10,476 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 121 treesize of output 86 [2023-08-24 09:22:10,530 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:22:10,531 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 327670 treesize of output 299070 [2023-08-24 09:22:10,642 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:22:10,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2326 treesize of output 2226 [2023-08-24 09:22:10,700 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:22:10,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2166 treesize of output 1906 [2023-08-24 09:22:10,768 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:22:10,768 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1846 treesize of output 1266 [2023-08-24 09:22:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:22:42,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934442328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:22:42,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:22:42,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 39 [2023-08-24 09:22:42,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920999756] [2023-08-24 09:22:42,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:22:42,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 09:22:42,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:22:42,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 09:22:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1386, Unknown=23, NotChecked=0, Total=1640 [2023-08-24 09:22:42,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 09:22:42,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 2573 transitions, 55677 flow. Second operand has 41 states, 41 states have (on average 86.82926829268293) internal successors, (3560), 41 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:22:42,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:22:42,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 09:22:42,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:22:45,221 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] [2023-08-24 09:22:47,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:22:49,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:22:51,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:22:53,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:22:56,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:22:59,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:23:01,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:23:03,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:23:07,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 09:23:09,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 09:23:22,475 INFO L124 PetriNetUnfolderBase]: 16093/23599 cut-off events. [2023-08-24 09:23:22,476 INFO L125 PetriNetUnfolderBase]: For 826729/826729 co-relation queries the response was YES. [2023-08-24 09:23:22,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268192 conditions, 23599 events. 16093/23599 cut-off events. For 826729/826729 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 147688 event pairs, 1307 based on Foata normal form. 3/23578 useless extension candidates. Maximal degree in co-relation 268007. Up to 15876 conditions per place. [2023-08-24 09:23:22,825 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 2218 selfloop transitions, 1734 changer transitions 6/3958 dead transitions. [2023-08-24 09:23:22,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 3958 transitions, 93141 flow [2023-08-24 09:23:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 09:23:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 09:23:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3932 transitions. [2023-08-24 09:23:22,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25649054142204825 [2023-08-24 09:23:22,828 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3932 transitions. [2023-08-24 09:23:22,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3932 transitions. [2023-08-24 09:23:22,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:23:22,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3932 transitions. [2023-08-24 09:23:22,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 93.61904761904762) internal successors, (3932), 42 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:23:22,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 365.0) internal successors, (15695), 43 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:23:22,837 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 365.0) internal successors, (15695), 43 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:23:22,837 INFO L175 Difference]: Start difference. First operand has 516 places, 2573 transitions, 55677 flow. Second operand 42 states and 3932 transitions. [2023-08-24 09:23:22,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 3958 transitions, 93141 flow [2023-08-24 09:23:36,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 3958 transitions, 91753 flow, removed 624 selfloop flow, removed 10 redundant places. [2023-08-24 09:23:37,039 INFO L231 Difference]: Finished difference. Result has 567 places, 3485 transitions, 81941 flow [2023-08-24 09:23:37,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=54623, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=933, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=81941, PETRI_PLACES=567, PETRI_TRANSITIONS=3485} [2023-08-24 09:23:37,041 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 536 predicate places. [2023-08-24 09:23:37,041 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 3485 transitions, 81941 flow [2023-08-24 09:23:37,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 86.82926829268293) internal successors, (3560), 41 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:23:37,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:23:37,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:23:37,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 09:23:37,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:23:37,242 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:23:37,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:23:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1694342515, now seen corresponding path program 13 times [2023-08-24 09:23:37,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:23:37,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011085235] [2023-08-24 09:23:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:23:37,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:23:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:23:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:23:38,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:23:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011085235] [2023-08-24 09:23:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011085235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:23:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067333296] [2023-08-24 09:23:38,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:23:38,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:23:38,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:23:38,653 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:23:38,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 09:23:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:23:38,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 96 conjunts are in the unsatisfiable core [2023-08-24 09:23:38,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:23:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:23:39,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:23:39,282 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 09:23:39,283 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-24 09:23:39,507 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:23:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:23:39,528 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 09:23:39,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 37 [2023-08-24 09:23:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:23:39,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:23:40,329 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 09:23:40,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 298 treesize of output 426 [2023-08-24 09:23:40,343 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:23:40,344 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 09:23:40,365 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:23:40,365 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 122 [2023-08-24 09:23:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 09:23:58,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067333296] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:23:58,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:23:58,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 41 [2023-08-24 09:23:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537697400] [2023-08-24 09:23:58,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:23:58,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 09:23:58,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:23:58,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 09:23:58,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1626, Unknown=17, NotChecked=0, Total=1806 [2023-08-24 09:23:58,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 365 [2023-08-24 09:23:58,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 3485 transitions, 81941 flow. Second operand has 43 states, 43 states have (on average 83.67441860465117) internal successors, (3598), 43 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:23:58,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:23:58,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 365 [2023-08-24 09:23:58,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:24:18,130 INFO L124 PetriNetUnfolderBase]: 17722/26041 cut-off events. [2023-08-24 09:24:18,130 INFO L125 PetriNetUnfolderBase]: For 1052514/1052514 co-relation queries the response was YES. [2023-08-24 09:24:18,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311197 conditions, 26041 events. 17722/26041 cut-off events. For 1052514/1052514 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 166117 event pairs, 1584 based on Foata normal form. 3/26020 useless extension candidates. Maximal degree in co-relation 310991. Up to 20126 conditions per place. [2023-08-24 09:24:18,572 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 2738 selfloop transitions, 1258 changer transitions 1/3997 dead transitions. [2023-08-24 09:24:18,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 3997 transitions, 101132 flow [2023-08-24 09:24:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 09:24:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 09:24:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2613 transitions. [2023-08-24 09:24:18,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2468587623996221 [2023-08-24 09:24:18,575 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2613 transitions. [2023-08-24 09:24:18,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2613 transitions. [2023-08-24 09:24:18,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:24:18,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2613 transitions. [2023-08-24 09:24:18,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 90.10344827586206) internal successors, (2613), 29 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:24:18,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 365.0) internal successors, (10950), 30 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:24:18,581 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 365.0) internal successors, (10950), 30 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:24:18,581 INFO L175 Difference]: Start difference. First operand has 567 places, 3485 transitions, 81941 flow. Second operand 29 states and 2613 transitions. [2023-08-24 09:24:18,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 3997 transitions, 101132 flow [2023-08-24 09:24:37,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 3997 transitions, 98863 flow, removed 1051 selfloop flow, removed 13 redundant places. [2023-08-24 09:24:37,084 INFO L231 Difference]: Finished difference. Result has 597 places, 3804 transitions, 92212 flow [2023-08-24 09:24:37,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=80066, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=976, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=92212, PETRI_PLACES=597, PETRI_TRANSITIONS=3804} [2023-08-24 09:24:37,086 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 566 predicate places. [2023-08-24 09:24:37,087 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 3804 transitions, 92212 flow [2023-08-24 09:24:37,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 83.67441860465117) internal successors, (3598), 43 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:24:37,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:24:37,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:24:37,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 09:24:37,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 09:24:37,289 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:24:37,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:24:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1643705319, now seen corresponding path program 14 times [2023-08-24 09:24:37,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:24:37,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733543291] [2023-08-24 09:24:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:24:37,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:24:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:24:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:24:38,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:24:38,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733543291] [2023-08-24 09:24:38,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733543291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:24:38,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467988399] [2023-08-24 09:24:38,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:24:38,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:24:38,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:24:38,343 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:24:38,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 09:24:38,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:24:38,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:24:38,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 09:24:38,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:24:38,745 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 [2023-08-24 09:24:38,791 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 6 treesize of output 5 [2023-08-24 09:24:38,848 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 6 treesize of output 5 [2023-08-24 09:24:38,888 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 6 treesize of output 5 [2023-08-24 09:24:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 09:24:39,304 INFO L322 Elim1Store]: treesize reduction 48, result has 54.3 percent of original size [2023-08-24 09:24:39,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 78 [2023-08-24 09:24:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:24:39,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:25:28,683 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:25:28,684 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 125 treesize of output 90 [2023-08-24 09:25:28,734 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:25:28,734 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22518 treesize of output 20546 [2023-08-24 09:25:28,842 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:25:28,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2550 treesize of output 2422 [2023-08-24 09:25:28,917 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:25:28,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2358 treesize of output 2038 [2023-08-24 09:25:28,983 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 09:25:28,983 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1974 treesize of output 1270 Received shutdown request... [2023-08-24 09:25:29,365 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-24 09:25:29,367 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 09:25:29,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-24 09:25:29,384 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 [2023-08-24 09:25:29,384 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:25:29,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 09:25:29,573 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 7ms.. [2023-08-24 09:25:29,574 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 09:25:29,574 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 09:25:29,575 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 09:25:29,575 INFO L445 BasicCegarLoop]: Path program histogram: [23, 14, 1, 1, 1] [2023-08-24 09:25:29,577 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 09:25:29,577 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 09:25:29,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 09:25:29 BasicIcfg [2023-08-24 09:25:29,578 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 09:25:29,578 INFO L158 Benchmark]: Toolchain (without parser) took 811466.86ms. Allocated memory was 358.6MB in the beginning and 4.6GB in the end (delta: 4.3GB). Free memory was 334.8MB in the beginning and 2.2GB in the end (delta: -1.8GB). Peak memory consumption was 2.4GB. Max. memory is 16.0GB. [2023-08-24 09:25:29,578 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 358.6MB. Free memory was 336.6MB in the beginning and 336.5MB in the end (delta: 92.1kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 09:25:29,579 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.68ms. Allocated memory is still 358.6MB. Free memory was 334.3MB in the beginning and 321.1MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 09:25:29,579 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.73ms. Allocated memory is still 358.6MB. Free memory was 321.1MB in the beginning and 318.4MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:25:29,579 INFO L158 Benchmark]: Boogie Preprocessor took 43.83ms. Allocated memory is still 358.6MB. Free memory was 318.4MB in the beginning and 316.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:25:29,579 INFO L158 Benchmark]: RCFGBuilder took 638.71ms. Allocated memory is still 358.6MB. Free memory was 316.3MB in the beginning and 254.0MB in the end (delta: 62.3MB). Peak memory consumption was 62.9MB. Max. memory is 16.0GB. [2023-08-24 09:25:29,579 INFO L158 Benchmark]: TraceAbstraction took 810495.29ms. Allocated memory was 358.6MB in the beginning and 4.6GB in the end (delta: 4.3GB). Free memory was 253.4MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 2.4GB. Max. memory is 16.0GB. [2023-08-24 09:25:29,580 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 358.6MB. Free memory was 336.6MB in the beginning and 336.5MB in the end (delta: 92.1kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 230.68ms. Allocated memory is still 358.6MB. Free memory was 334.3MB in the beginning and 321.1MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 53.73ms. Allocated memory is still 358.6MB. Free memory was 321.1MB in the beginning and 318.4MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 43.83ms. Allocated memory is still 358.6MB. Free memory was 318.4MB in the beginning and 316.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 638.71ms. Allocated memory is still 358.6MB. Free memory was 316.3MB in the beginning and 254.0MB in the end (delta: 62.3MB). Peak memory consumption was 62.9MB. Max. memory is 16.0GB. * TraceAbstraction took 810495.29ms. Allocated memory was 358.6MB in the beginning and 4.6GB in the end (delta: 4.3GB). Free memory was 253.4MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 2.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 166 PlacesBefore, 31 PlacesAfterwards, 172 TransitionsBefore, 26 TransitionsAfterwards, 1518 CoEnabledTransitionPairs, 7 FixpointIterations, 109 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 24 TrivialYvCompositions, 6 ConcurrentYvCompositions, 11 ChoiceCompositions, 180 TotalNumberOfCompositions, 1610 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1498, independent: 1480, independent conditional: 0, independent unconditional: 1480, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 802, independent: 794, independent conditional: 0, independent unconditional: 794, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1498, independent: 686, independent conditional: 0, independent unconditional: 686, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 802, unknown conditional: 0, unknown unconditional: 802] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 7ms.. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 7ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 7ms.. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 203 locations, 4 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: 810.4s, OverallIterations: 40, TraceHistogramMax: 2, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 250.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.6s, HoareTripleCheckerStatistics: 35 mSolverCounterUnknown, 6942 SdHoareTripleChecker+Valid, 67.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6942 mSDsluCounter, 3559 SdHoareTripleChecker+Invalid, 63.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1990 IncrementalHoareTripleChecker+Unchecked, 3291 mSDsCounter, 920 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 43835 IncrementalHoareTripleChecker+Invalid, 46780 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 920 mSolverCounterUnsat, 268 mSDtfsCounter, 43835 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2964 GetRequests, 1305 SyntacticMatches, 91 SemanticMatches, 1568 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 21254 ImplicationChecksByTransitivity, 85.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92212occurred in iteration=39, InterpolantAutomatonStates: 921, 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: 0.6s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 487.7s InterpolantComputationTime, 2037 NumberOfCodeBlocks, 2037 NumberOfCodeBlocksAsserted, 110 NumberOfCheckSat, 2921 ConstructedInterpolants, 116 QuantifiedInterpolants, 51820 SizeOfPredicates, 687 NumberOfNonLiveVariables, 12136 ConjunctsInSsa, 1746 ConjunctsInUnsatCore, 113 InterpolantComputations, 3 PerfectInterpolantSequences, 348/841 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