/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 03:05:14,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 03:05:14,515 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 03:05:14,518 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 03:05:14,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 03:05:14,543 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 03:05:14,543 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 03:05:14,544 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 03:05:14,544 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 03:05:14,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 03:05:14,547 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 03:05:14,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 03:05:14,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 03:05:14,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 03:05:14,549 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 03:05:14,549 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 03:05:14,549 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 03:05:14,549 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 03:05:14,549 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 03:05:14,549 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 03:05:14,550 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 03:05:14,550 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 03:05:14,550 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 03:05:14,551 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 03:05:14,551 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 03:05:14,551 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 03:05:14,551 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 03:05:14,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:05:14,552 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 03:05:14,552 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 03:05:14,552 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 03:05:14,553 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 03:05:14,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 03:05:14,553 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 03:05:14,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 03:05:14,553 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 03:05:14,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 03:05:14,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 03:05:14,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 03:05:14,845 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 03:05:14,847 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 03:05:14,848 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-24 03:05:15,834 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 03:05:16,049 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 03:05:16,049 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-08-24 03:05:16,055 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4530a056c/c6fe52c4d4d5426e9d8b3863e509147c/FLAGdeb8e86b8 [2023-08-24 03:05:16,065 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4530a056c/c6fe52c4d4d5426e9d8b3863e509147c [2023-08-24 03:05:16,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 03:05:16,068 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 03:05:16,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 03:05:16,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 03:05:16,070 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 03:05:16,071 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0d3a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16, skipping insertion in model container [2023-08-24 03:05:16,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,085 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 03:05:16,213 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-multiply-verify.wvr.c[3042,3055] [2023-08-24 03:05:16,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:05:16,232 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 03:05:16,262 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-multiply-verify.wvr.c[3042,3055] [2023-08-24 03:05:16,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:05:16,272 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:05:16,273 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:05:16,278 INFO L206 MainTranslator]: Completed translation [2023-08-24 03:05:16,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16 WrapperNode [2023-08-24 03:05:16,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 03:05:16,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 03:05:16,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 03:05:16,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 03:05:16,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,298 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,326 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 187 [2023-08-24 03:05:16,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 03:05:16,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 03:05:16,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 03:05:16,327 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 03:05:16,333 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,343 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,344 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,353 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 03:05:16,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 03:05:16,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 03:05:16,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 03:05:16,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (1/1) ... [2023-08-24 03:05:16,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:05:16,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:16,391 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 03:05:16,393 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 03:05:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 03:05:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 03:05:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 03:05:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 03:05:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 03:05:16,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 03:05:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 03:05:16,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 03:05:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 03:05:16,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 03:05:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 03:05:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 03:05:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 03:05:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 03:05:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 03:05:16,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 03:05:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 03:05:16,419 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 03:05:16,488 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 03:05:16,489 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 03:05:16,727 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 03:05:16,816 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 03:05:16,816 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 03:05:16,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:05:16 BoogieIcfgContainer [2023-08-24 03:05:16,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 03:05:16,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 03:05:16,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 03:05:16,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 03:05:16,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:05:16" (1/3) ... [2023-08-24 03:05:16,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2974b282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:05:16, skipping insertion in model container [2023-08-24 03:05:16,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:05:16" (2/3) ... [2023-08-24 03:05:16,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2974b282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:05:16, skipping insertion in model container [2023-08-24 03:05:16,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:05:16" (3/3) ... [2023-08-24 03:05:16,823 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-08-24 03:05:16,834 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 03:05:16,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 03:05:16,835 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 03:05:16,916 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 03:05:16,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 152 transitions, 328 flow [2023-08-24 03:05:17,008 INFO L124 PetriNetUnfolderBase]: 9/149 cut-off events. [2023-08-24 03:05:17,008 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 03:05:17,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 149 events. 9/149 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-24 03:05:17,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 152 transitions, 328 flow [2023-08-24 03:05:17,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 139 transitions, 296 flow [2023-08-24 03:05:17,019 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 03:05:17,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 139 transitions, 296 flow [2023-08-24 03:05:17,026 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 139 transitions, 296 flow [2023-08-24 03:05:17,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 139 transitions, 296 flow [2023-08-24 03:05:17,059 INFO L124 PetriNetUnfolderBase]: 9/139 cut-off events. [2023-08-24 03:05:17,059 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 03:05:17,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 9/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-24 03:05:17,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 1600 [2023-08-24 03:05:21,003 INFO L134 LiptonReduction]: Checked pairs total: 1697 [2023-08-24 03:05:21,003 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-24 03:05:21,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 03:05:21,032 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;@57f23f19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 03:05:21,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 03:05:21,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 03:05:21,049 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-08-24 03:05:21,049 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 03:05:21,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:21,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:05:21,050 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 03:05:21,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash -575482243, now seen corresponding path program 1 times [2023-08-24 03:05:21,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:21,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301026796] [2023-08-24 03:05:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:21,432 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 03:05:21,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:21,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301026796] [2023-08-24 03:05:21,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301026796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:21,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:05:21,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 03:05:21,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132568296] [2023-08-24 03:05:21,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:21,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:05:21,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:21,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:05:21,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:05:21,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 284 [2023-08-24 03:05:21,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:21,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:21,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 284 [2023-08-24 03:05:21,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:21,568 INFO L124 PetriNetUnfolderBase]: 169/271 cut-off events. [2023-08-24 03:05:21,568 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-24 03:05:21,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 271 events. 169/271 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 667 event pairs, 108 based on Foata normal form. 8/235 useless extension candidates. Maximal degree in co-relation 372. Up to 217 conditions per place. [2023-08-24 03:05:21,572 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 21 selfloop transitions, 2 changer transitions 11/34 dead transitions. [2023-08-24 03:05:21,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 163 flow [2023-08-24 03:05:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:05:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:05:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 521 transitions. [2023-08-24 03:05:21,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586267605633803 [2023-08-24 03:05:21,590 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 521 transitions. [2023-08-24 03:05:21,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 521 transitions. [2023-08-24 03:05:21,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:21,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 521 transitions. [2023-08-24 03:05:21,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:21,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:21,600 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:21,601 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 4 states and 521 transitions. [2023-08-24 03:05:21,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 163 flow [2023-08-24 03:05:21,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 03:05:21,604 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 68 flow [2023-08-24 03:05:21,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-08-24 03:05:21,607 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-24 03:05:21,608 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 68 flow [2023-08-24 03:05:21,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:21,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:21,608 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] [2023-08-24 03:05:21,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 03:05:21,609 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 03:05:21,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1768297043, now seen corresponding path program 1 times [2023-08-24 03:05:21,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:21,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529031282] [2023-08-24 03:05:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:21,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529031282] [2023-08-24 03:05:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529031282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742364479] [2023-08-24 03:05:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:21,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:21,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:21,754 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 03:05:21,796 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 03:05:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:21,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:05:21,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:21,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:05:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:22,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742364479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:05:22,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:05:22,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-08-24 03:05:22,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85243443] [2023-08-24 03:05:22,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:05:22,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 03:05:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 03:05:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-24 03:05:22,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 284 [2023-08-24 03:05:22,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 68 flow. Second operand has 11 states, 11 states have (on average 122.36363636363636) internal successors, (1346), 11 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:22,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:22,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 284 [2023-08-24 03:05:22,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:22,162 INFO L124 PetriNetUnfolderBase]: 203/328 cut-off events. [2023-08-24 03:05:22,162 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-24 03:05:22,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 328 events. 203/328 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 918 event pairs, 108 based on Foata normal form. 30/356 useless extension candidates. Maximal degree in co-relation 767. Up to 217 conditions per place. [2023-08-24 03:05:22,164 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 21 selfloop transitions, 3 changer transitions 24/48 dead transitions. [2023-08-24 03:05:22,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 228 flow [2023-08-24 03:05:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 03:05:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 03:05:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 766 transitions. [2023-08-24 03:05:22,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495305164319249 [2023-08-24 03:05:22,166 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 766 transitions. [2023-08-24 03:05:22,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 766 transitions. [2023-08-24 03:05:22,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:22,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 766 transitions. [2023-08-24 03:05:22,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.66666666666667) internal successors, (766), 6 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:22,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:22,171 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:22,171 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 68 flow. Second operand 6 states and 766 transitions. [2023-08-24 03:05:22,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 228 flow [2023-08-24 03:05:22,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 03:05:22,172 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 92 flow [2023-08-24 03:05:22,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-24 03:05:22,173 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-24 03:05:22,173 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 92 flow [2023-08-24 03:05:22,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 122.36363636363636) internal successors, (1346), 11 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:22,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:22,174 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] [2023-08-24 03:05:22,183 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 03:05:22,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:22,379 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 03:05:22,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:22,379 INFO L85 PathProgramCache]: Analyzing trace with hash 153755981, now seen corresponding path program 2 times [2023-08-24 03:05:22,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:22,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933559050] [2023-08-24 03:05:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:22,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:24,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933559050] [2023-08-24 03:05:24,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933559050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593268726] [2023-08-24 03:05:24,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:05:24,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:24,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:24,234 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 03:05:24,236 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 03:05:24,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 03:05:24,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:05:24,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:05:24,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:24,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:05:24,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-08-24 03:05:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:24,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:05:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593268726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:24,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:05:24,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-24 03:05:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352101373] [2023-08-24 03:05:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:05:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:05:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-08-24 03:05:24,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:05:24,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 92 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:24,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:24,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:05:24,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:24,887 INFO L124 PetriNetUnfolderBase]: 169/288 cut-off events. [2023-08-24 03:05:24,887 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-08-24 03:05:24,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 288 events. 169/288 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 858 event pairs, 32 based on Foata normal form. 25/312 useless extension candidates. Maximal degree in co-relation 847. Up to 137 conditions per place. [2023-08-24 03:05:24,889 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 50 selfloop transitions, 13 changer transitions 13/76 dead transitions. [2023-08-24 03:05:24,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 405 flow [2023-08-24 03:05:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:05:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:05:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 919 transitions. [2023-08-24 03:05:24,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044894366197183 [2023-08-24 03:05:24,891 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 919 transitions. [2023-08-24 03:05:24,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 919 transitions. [2023-08-24 03:05:24,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:24,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 919 transitions. [2023-08-24 03:05:24,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:24,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:24,897 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:24,897 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 92 flow. Second operand 8 states and 919 transitions. [2023-08-24 03:05:24,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 405 flow [2023-08-24 03:05:24,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 76 transitions, 357 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-24 03:05:24,901 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 181 flow [2023-08-24 03:05:24,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=181, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-24 03:05:24,902 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-08-24 03:05:24,902 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 181 flow [2023-08-24 03:05:24,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:24,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:24,903 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] [2023-08-24 03:05:24,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 03:05:25,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-24 03:05:25,108 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 03:05:25,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash -784383183, now seen corresponding path program 3 times [2023-08-24 03:05:25,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:25,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126767528] [2023-08-24 03:05:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:25,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:26,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126767528] [2023-08-24 03:05:26,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126767528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790857757] [2023-08-24 03:05:26,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:05:26,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:26,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:26,285 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 03:05:26,287 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 03:05:26,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 03:05:26,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:05:26,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 03:05:26,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:26,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:05:26,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790857757] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:26,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:05:26,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-24 03:05:26,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908674776] [2023-08-24 03:05:26,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:26,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 03:05:26,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 03:05:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:05:26,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 284 [2023-08-24 03:05:26,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 181 flow. Second operand has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:26,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:26,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 284 [2023-08-24 03:05:26,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:26,764 INFO L124 PetriNetUnfolderBase]: 245/402 cut-off events. [2023-08-24 03:05:26,764 INFO L125 PetriNetUnfolderBase]: For 864/864 co-relation queries the response was YES. [2023-08-24 03:05:26,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 402 events. 245/402 cut-off events. For 864/864 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1285 event pairs, 53 based on Foata normal form. 5/406 useless extension candidates. Maximal degree in co-relation 1480. Up to 215 conditions per place. [2023-08-24 03:05:26,766 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 52 selfloop transitions, 21 changer transitions 13/86 dead transitions. [2023-08-24 03:05:26,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 86 transitions, 560 flow [2023-08-24 03:05:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:05:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:05:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 970 transitions. [2023-08-24 03:05:26,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269366197183099 [2023-08-24 03:05:26,775 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 970 transitions. [2023-08-24 03:05:26,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 970 transitions. [2023-08-24 03:05:26,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:26,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 970 transitions. [2023-08-24 03:05:26,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.25) internal successors, (970), 8 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:26,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:26,780 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:26,780 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 181 flow. Second operand 8 states and 970 transitions. [2023-08-24 03:05:26,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 86 transitions, 560 flow [2023-08-24 03:05:26,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 524 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-24 03:05:26,785 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 341 flow [2023-08-24 03:05:26,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-24 03:05:26,786 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-08-24 03:05:26,786 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 341 flow [2023-08-24 03:05:26,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:26,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:26,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:05:26,807 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 03:05:26,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:26,993 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 03:05:26,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash 602180493, now seen corresponding path program 4 times [2023-08-24 03:05:26,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:26,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378144278] [2023-08-24 03:05:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:26,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:27,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:27,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378144278] [2023-08-24 03:05:27,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378144278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:27,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316803408] [2023-08-24 03:05:27,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:05:27,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:27,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:27,929 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 03:05:27,961 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 03:05:28,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:05:28,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:05:28,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 03:05:28,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:28,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:05:28,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 03:05:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:28,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:05:28,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316803408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:28,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:05:28,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-24 03:05:28,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918887848] [2023-08-24 03:05:28,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:28,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:05:28,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:05:28,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-08-24 03:05:28,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:05:28,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 341 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:28,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:28,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:05:28,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:28,543 INFO L124 PetriNetUnfolderBase]: 244/408 cut-off events. [2023-08-24 03:05:28,544 INFO L125 PetriNetUnfolderBase]: For 1336/1336 co-relation queries the response was YES. [2023-08-24 03:05:28,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 408 events. 244/408 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1367 event pairs, 40 based on Foata normal form. 1/408 useless extension candidates. Maximal degree in co-relation 1782. Up to 187 conditions per place. [2023-08-24 03:05:28,546 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 58 selfloop transitions, 20 changer transitions 15/93 dead transitions. [2023-08-24 03:05:28,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 693 flow [2023-08-24 03:05:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:05:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:05:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 915 transitions. [2023-08-24 03:05:28,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027288732394366 [2023-08-24 03:05:28,549 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 915 transitions. [2023-08-24 03:05:28,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 915 transitions. [2023-08-24 03:05:28,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:28,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 915 transitions. [2023-08-24 03:05:28,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.375) internal successors, (915), 8 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:28,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:28,555 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:28,555 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 341 flow. Second operand 8 states and 915 transitions. [2023-08-24 03:05:28,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 693 flow [2023-08-24 03:05:28,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 665 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-24 03:05:28,560 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 354 flow [2023-08-24 03:05:28,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=354, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-08-24 03:05:28,562 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-08-24 03:05:28,562 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 354 flow [2023-08-24 03:05:28,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:28,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:28,563 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] [2023-08-24 03:05:28,571 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 03:05:28,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:28,768 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 03:05:28,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1538024075, now seen corresponding path program 5 times [2023-08-24 03:05:28,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:28,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574397737] [2023-08-24 03:05:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:28,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:30,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:30,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574397737] [2023-08-24 03:05:30,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574397737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:30,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302272455] [2023-08-24 03:05:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:05:30,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:30,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:30,562 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 03:05:30,563 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 03:05:30,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:05:30,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:05:30,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 03:05:30,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:05:30,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:05:30,974 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:05:30,975 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 58 treesize of output 60 [2023-08-24 03:05:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:31,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302272455] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:31,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:05:31,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 23 [2023-08-24 03:05:31,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64453062] [2023-08-24 03:05:31,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:31,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 03:05:31,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 03:05:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:05:31,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 284 [2023-08-24 03:05:31,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 354 flow. Second operand has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:31,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:31,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 284 [2023-08-24 03:05:31,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:31,580 INFO L124 PetriNetUnfolderBase]: 265/438 cut-off events. [2023-08-24 03:05:31,580 INFO L125 PetriNetUnfolderBase]: For 1863/1863 co-relation queries the response was YES. [2023-08-24 03:05:31,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 438 events. 265/438 cut-off events. For 1863/1863 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1481 event pairs, 46 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 2017. Up to 217 conditions per place. [2023-08-24 03:05:31,583 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 57 selfloop transitions, 25 changer transitions 13/95 dead transitions. [2023-08-24 03:05:31,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 757 flow [2023-08-24 03:05:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:05:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:05:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 972 transitions. [2023-08-24 03:05:31,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278169014084507 [2023-08-24 03:05:31,586 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 972 transitions. [2023-08-24 03:05:31,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 972 transitions. [2023-08-24 03:05:31,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:31,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 972 transitions. [2023-08-24 03:05:31,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.5) internal successors, (972), 8 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:31,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:31,590 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:31,590 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 354 flow. Second operand 8 states and 972 transitions. [2023-08-24 03:05:31,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 757 flow [2023-08-24 03:05:31,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 95 transitions, 687 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-24 03:05:31,596 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 461 flow [2023-08-24 03:05:31,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=461, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2023-08-24 03:05:31,597 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2023-08-24 03:05:31,598 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 461 flow [2023-08-24 03:05:31,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:31,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:31,600 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] [2023-08-24 03:05:31,615 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 03:05:31,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:31,805 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 03:05:31,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:31,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1455676435, now seen corresponding path program 6 times [2023-08-24 03:05:31,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:31,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985634932] [2023-08-24 03:05:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:31,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:32,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:32,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985634932] [2023-08-24 03:05:32,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985634932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:32,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287736472] [2023-08-24 03:05:32,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:05:32,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:32,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:32,896 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 03:05:32,898 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 03:05:33,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 03:05:33,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:05:33,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 03:05:33,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:33,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:05:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287736472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:33,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:05:33,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-08-24 03:05:33,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336935963] [2023-08-24 03:05:33,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:33,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 03:05:33,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 03:05:33,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:05:33,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 284 [2023-08-24 03:05:33,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 461 flow. Second operand has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:33,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:33,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 284 [2023-08-24 03:05:33,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:33,319 INFO L124 PetriNetUnfolderBase]: 288/488 cut-off events. [2023-08-24 03:05:33,319 INFO L125 PetriNetUnfolderBase]: For 2078/2078 co-relation queries the response was YES. [2023-08-24 03:05:33,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346 conditions, 488 events. 288/488 cut-off events. For 2078/2078 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1785 event pairs, 45 based on Foata normal form. 1/488 useless extension candidates. Maximal degree in co-relation 2321. Up to 264 conditions per place. [2023-08-24 03:05:33,322 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 61 selfloop transitions, 29 changer transitions 13/103 dead transitions. [2023-08-24 03:05:33,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 873 flow [2023-08-24 03:05:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:05:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:05:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 973 transitions. [2023-08-24 03:05:33,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282570422535211 [2023-08-24 03:05:33,324 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 973 transitions. [2023-08-24 03:05:33,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 973 transitions. [2023-08-24 03:05:33,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:33,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 973 transitions. [2023-08-24 03:05:33,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.625) internal successors, (973), 8 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:33,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:33,329 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:33,329 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 461 flow. Second operand 8 states and 973 transitions. [2023-08-24 03:05:33,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 873 flow [2023-08-24 03:05:33,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 103 transitions, 830 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 03:05:33,334 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 570 flow [2023-08-24 03:05:33,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=570, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2023-08-24 03:05:33,335 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-08-24 03:05:33,335 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 570 flow [2023-08-24 03:05:33,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:33,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:33,335 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] [2023-08-24 03:05:33,363 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 03:05:33,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:33,546 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 03:05:33,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:33,546 INFO L85 PathProgramCache]: Analyzing trace with hash -342574381, now seen corresponding path program 7 times [2023-08-24 03:05:33,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:33,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840060550] [2023-08-24 03:05:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:33,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:34,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840060550] [2023-08-24 03:05:34,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840060550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484231267] [2023-08-24 03:05:34,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:05:34,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:34,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:34,268 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 03:05:34,290 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 03:05:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:34,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 03:05:34,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:34,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:05:34,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2023-08-24 03:05:34,680 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 03:05:34,680 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 85 treesize of output 41 [2023-08-24 03:05:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:34,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:05:34,939 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:05:34,939 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 86 treesize of output 89 [2023-08-24 03:05:35,097 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:05:35,098 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 20 treesize of output 7 [2023-08-24 03:05:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:35,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484231267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:05:35,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:05:35,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-24 03:05:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961811183] [2023-08-24 03:05:35,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:05:35,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 03:05:35,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 03:05:35,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2023-08-24 03:05:35,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 284 [2023-08-24 03:05:35,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 570 flow. Second operand has 32 states, 32 states have (on average 93.96875) internal successors, (3007), 32 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:35,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:35,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 284 [2023-08-24 03:05:35,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:37,770 INFO L124 PetriNetUnfolderBase]: 797/1397 cut-off events. [2023-08-24 03:05:37,770 INFO L125 PetriNetUnfolderBase]: For 8556/8556 co-relation queries the response was YES. [2023-08-24 03:05:37,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7069 conditions, 1397 events. 797/1397 cut-off events. For 8556/8556 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7065 event pairs, 162 based on Foata normal form. 1/1396 useless extension candidates. Maximal degree in co-relation 7018. Up to 475 conditions per place. [2023-08-24 03:05:37,778 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 199 selfloop transitions, 75 changer transitions 13/287 dead transitions. [2023-08-24 03:05:37,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 287 transitions, 2622 flow [2023-08-24 03:05:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 03:05:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 03:05:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2134 transitions. [2023-08-24 03:05:37,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.357813547954393 [2023-08-24 03:05:37,783 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2134 transitions. [2023-08-24 03:05:37,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2134 transitions. [2023-08-24 03:05:37,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:37,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2134 transitions. [2023-08-24 03:05:37,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.61904761904762) internal successors, (2134), 21 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:37,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:37,792 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:37,793 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 570 flow. Second operand 21 states and 2134 transitions. [2023-08-24 03:05:37,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 287 transitions, 2622 flow [2023-08-24 03:05:37,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 287 transitions, 2485 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-08-24 03:05:37,804 INFO L231 Difference]: Finished difference. Result has 90 places, 145 transitions, 1615 flow [2023-08-24 03:05:37,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1615, PETRI_PLACES=90, PETRI_TRANSITIONS=145} [2023-08-24 03:05:37,806 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2023-08-24 03:05:37,806 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 145 transitions, 1615 flow [2023-08-24 03:05:37,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 93.96875) internal successors, (3007), 32 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:37,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:37,807 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] [2023-08-24 03:05:37,812 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 03:05:38,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:38,012 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 03:05:38,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1214010809, now seen corresponding path program 8 times [2023-08-24 03:05:38,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:38,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567491980] [2023-08-24 03:05:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:38,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:38,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567491980] [2023-08-24 03:05:38,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567491980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:38,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:05:38,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 03:05:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261526664] [2023-08-24 03:05:38,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:05:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:05:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:05:38,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 284 [2023-08-24 03:05:38,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 145 transitions, 1615 flow. Second operand has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:38,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:38,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 284 [2023-08-24 03:05:38,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:38,194 INFO L124 PetriNetUnfolderBase]: 622/1101 cut-off events. [2023-08-24 03:05:38,194 INFO L125 PetriNetUnfolderBase]: For 11785/11785 co-relation queries the response was YES. [2023-08-24 03:05:38,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6245 conditions, 1101 events. 622/1101 cut-off events. For 11785/11785 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5284 event pairs, 130 based on Foata normal form. 74/1174 useless extension candidates. Maximal degree in co-relation 6196. Up to 568 conditions per place. [2023-08-24 03:05:38,201 INFO L140 encePairwiseOnDemand]: 280/284 looper letters, 95 selfloop transitions, 45 changer transitions 1/141 dead transitions. [2023-08-24 03:05:38,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 141 transitions, 1739 flow [2023-08-24 03:05:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:05:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:05:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 559 transitions. [2023-08-24 03:05:38,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4920774647887324 [2023-08-24 03:05:38,202 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 559 transitions. [2023-08-24 03:05:38,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 559 transitions. [2023-08-24 03:05:38,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:38,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 559 transitions. [2023-08-24 03:05:38,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:38,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:38,205 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:38,205 INFO L175 Difference]: Start difference. First operand has 90 places, 145 transitions, 1615 flow. Second operand 4 states and 559 transitions. [2023-08-24 03:05:38,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 141 transitions, 1739 flow [2023-08-24 03:05:38,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 141 transitions, 1583 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-24 03:05:38,228 INFO L231 Difference]: Finished difference. Result has 85 places, 128 transitions, 1362 flow [2023-08-24 03:05:38,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1362, PETRI_PLACES=85, PETRI_TRANSITIONS=128} [2023-08-24 03:05:38,229 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2023-08-24 03:05:38,229 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 128 transitions, 1362 flow [2023-08-24 03:05:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:38,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:38,229 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] [2023-08-24 03:05:38,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 03:05:38,230 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 03:05:38,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1634147313, now seen corresponding path program 9 times [2023-08-24 03:05:38,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:38,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951848370] [2023-08-24 03:05:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951848370] [2023-08-24 03:05:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951848370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774591541] [2023-08-24 03:05:39,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:05:39,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:39,038 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 03:05:39,039 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 03:05:39,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 03:05:39,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:05:39,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 03:05:39,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:05:39,236 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-24 03:05:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:05:39,270 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-24 03:05:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:39,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:05:39,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774591541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:39,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:05:39,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 19 [2023-08-24 03:05:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356134168] [2023-08-24 03:05:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:39,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 03:05:39,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:39,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 03:05:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-08-24 03:05:39,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 284 [2023-08-24 03:05:39,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 128 transitions, 1362 flow. Second operand has 11 states, 11 states have (on average 103.81818181818181) internal successors, (1142), 11 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:39,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:39,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 284 [2023-08-24 03:05:39,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:39,684 INFO L124 PetriNetUnfolderBase]: 655/1175 cut-off events. [2023-08-24 03:05:39,685 INFO L125 PetriNetUnfolderBase]: For 7928/7928 co-relation queries the response was YES. [2023-08-24 03:05:39,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6623 conditions, 1175 events. 655/1175 cut-off events. For 7928/7928 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5912 event pairs, 95 based on Foata normal form. 2/1176 useless extension candidates. Maximal degree in co-relation 5330. Up to 594 conditions per place. [2023-08-24 03:05:39,692 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 111 selfloop transitions, 48 changer transitions 14/173 dead transitions. [2023-08-24 03:05:39,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 173 transitions, 2001 flow [2023-08-24 03:05:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:05:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:05:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 891 transitions. [2023-08-24 03:05:39,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3921654929577465 [2023-08-24 03:05:39,694 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 891 transitions. [2023-08-24 03:05:39,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 891 transitions. [2023-08-24 03:05:39,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:39,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 891 transitions. [2023-08-24 03:05:39,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.375) internal successors, (891), 8 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:39,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:39,698 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:39,698 INFO L175 Difference]: Start difference. First operand has 85 places, 128 transitions, 1362 flow. Second operand 8 states and 891 transitions. [2023-08-24 03:05:39,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 173 transitions, 2001 flow [2023-08-24 03:05:39,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 173 transitions, 1953 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 03:05:39,718 INFO L231 Difference]: Finished difference. Result has 93 places, 133 transitions, 1513 flow [2023-08-24 03:05:39,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1513, PETRI_PLACES=93, PETRI_TRANSITIONS=133} [2023-08-24 03:05:39,719 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-08-24 03:05:39,719 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 133 transitions, 1513 flow [2023-08-24 03:05:39,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 103.81818181818181) internal successors, (1142), 11 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:39,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:39,720 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] [2023-08-24 03:05:39,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 03:05:39,924 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 03:05:39,925 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 03:05:39,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:39,926 INFO L85 PathProgramCache]: Analyzing trace with hash -403024087, now seen corresponding path program 10 times [2023-08-24 03:05:39,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:39,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542235095] [2023-08-24 03:05:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:39,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:40,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:40,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542235095] [2023-08-24 03:05:40,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542235095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:40,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552582030] [2023-08-24 03:05:40,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:05:40,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:40,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:40,859 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 03:05:40,861 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 03:05:40,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:05:40,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:05:40,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 03:05:40,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:41,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:05:41,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 03:05:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:05:41,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-08-24 03:05:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:41,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:05:41,445 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_480 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_480) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))) is different from false [2023-08-24 03:05:41,648 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:05:41,648 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 292 treesize of output 277 [2023-08-24 03:05:41,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:05:41,655 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 50 treesize of output 24 [2023-08-24 03:05:41,674 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:05:41,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 70 [2023-08-24 03:05:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:42,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552582030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:05:42,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:05:42,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-24 03:05:42,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877446296] [2023-08-24 03:05:42,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:05:42,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 03:05:42,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:42,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 03:05:42,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=984, Unknown=2, NotChecked=64, Total=1190 [2023-08-24 03:05:42,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 284 [2023-08-24 03:05:42,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 133 transitions, 1513 flow. Second operand has 35 states, 35 states have (on average 87.8) internal successors, (3073), 35 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:42,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:42,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 284 [2023-08-24 03:05:42,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:45,363 INFO L124 PetriNetUnfolderBase]: 890/1547 cut-off events. [2023-08-24 03:05:45,363 INFO L125 PetriNetUnfolderBase]: For 12804/12804 co-relation queries the response was YES. [2023-08-24 03:05:45,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9432 conditions, 1547 events. 890/1547 cut-off events. For 12804/12804 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8053 event pairs, 140 based on Foata normal form. 2/1545 useless extension candidates. Maximal degree in co-relation 9383. Up to 534 conditions per place. [2023-08-24 03:05:45,416 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 216 selfloop transitions, 95 changer transitions 30/341 dead transitions. [2023-08-24 03:05:45,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 341 transitions, 3747 flow [2023-08-24 03:05:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 03:05:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 03:05:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2972 transitions. [2023-08-24 03:05:45,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32702464788732394 [2023-08-24 03:05:45,424 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2972 transitions. [2023-08-24 03:05:45,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2972 transitions. [2023-08-24 03:05:45,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:45,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2972 transitions. [2023-08-24 03:05:45,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 92.875) internal successors, (2972), 32 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:45,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 284.0) internal successors, (9372), 33 states have internal predecessors, (9372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:45,443 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 284.0) internal successors, (9372), 33 states have internal predecessors, (9372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:45,444 INFO L175 Difference]: Start difference. First operand has 93 places, 133 transitions, 1513 flow. Second operand 32 states and 2972 transitions. [2023-08-24 03:05:45,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 341 transitions, 3747 flow [2023-08-24 03:05:45,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 341 transitions, 3620 flow, removed 33 selfloop flow, removed 3 redundant places. [2023-08-24 03:05:45,470 INFO L231 Difference]: Finished difference. Result has 134 places, 182 transitions, 2423 flow [2023-08-24 03:05:45,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2423, PETRI_PLACES=134, PETRI_TRANSITIONS=182} [2023-08-24 03:05:45,470 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2023-08-24 03:05:45,471 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 182 transitions, 2423 flow [2023-08-24 03:05:45,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 87.8) internal successors, (3073), 35 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:45,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:45,472 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] [2023-08-24 03:05:45,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 03:05:45,679 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 03:05:45,679 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 03:05:45,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:45,680 INFO L85 PathProgramCache]: Analyzing trace with hash -979702535, now seen corresponding path program 11 times [2023-08-24 03:05:45,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:45,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379772023] [2023-08-24 03:05:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379772023] [2023-08-24 03:05:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379772023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107098902] [2023-08-24 03:05:46,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:05:46,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:46,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:46,813 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 03:05:46,815 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 03:05:46,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:05:46,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:05:46,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:05:46,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:47,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:05:47,367 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:05:47,367 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 56 treesize of output 58 [2023-08-24 03:05:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:47,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107098902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:05:47,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:05:47,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-08-24 03:05:47,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803879259] [2023-08-24 03:05:47,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:05:47,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 03:05:47,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:47,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 03:05:47,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-08-24 03:05:47,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 284 [2023-08-24 03:05:47,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 182 transitions, 2423 flow. Second operand has 31 states, 31 states have (on average 88.03225806451613) internal successors, (2729), 31 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:47,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:47,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 284 [2023-08-24 03:05:47,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:50,370 INFO L124 PetriNetUnfolderBase]: 1002/1817 cut-off events. [2023-08-24 03:05:50,371 INFO L125 PetriNetUnfolderBase]: For 18242/18242 co-relation queries the response was YES. [2023-08-24 03:05:50,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11891 conditions, 1817 events. 1002/1817 cut-off events. For 18242/18242 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10249 event pairs, 139 based on Foata normal form. 2/1817 useless extension candidates. Maximal degree in co-relation 11835. Up to 379 conditions per place. [2023-08-24 03:05:50,384 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 182 selfloop transitions, 140 changer transitions 26/348 dead transitions. [2023-08-24 03:05:50,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 348 transitions, 4419 flow [2023-08-24 03:05:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 03:05:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 03:05:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2258 transitions. [2023-08-24 03:05:50,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312793427230047 [2023-08-24 03:05:50,387 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2258 transitions. [2023-08-24 03:05:50,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2258 transitions. [2023-08-24 03:05:50,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:50,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2258 transitions. [2023-08-24 03:05:50,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 94.08333333333333) internal successors, (2258), 24 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:50,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 284.0) internal successors, (7100), 25 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:50,395 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 284.0) internal successors, (7100), 25 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:50,395 INFO L175 Difference]: Start difference. First operand has 134 places, 182 transitions, 2423 flow. Second operand 24 states and 2258 transitions. [2023-08-24 03:05:50,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 348 transitions, 4419 flow [2023-08-24 03:05:50,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 348 transitions, 4201 flow, removed 102 selfloop flow, removed 10 redundant places. [2023-08-24 03:05:50,449 INFO L231 Difference]: Finished difference. Result has 157 places, 224 transitions, 3304 flow [2023-08-24 03:05:50,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3304, PETRI_PLACES=157, PETRI_TRANSITIONS=224} [2023-08-24 03:05:50,450 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2023-08-24 03:05:50,450 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 224 transitions, 3304 flow [2023-08-24 03:05:50,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 88.03225806451613) internal successors, (2729), 31 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:50,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:50,450 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] [2023-08-24 03:05:50,470 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 03:05:50,655 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 03:05:50,655 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 03:05:50,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1238853007, now seen corresponding path program 12 times [2023-08-24 03:05:50,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:50,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676006215] [2023-08-24 03:05:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:50,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:51,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:51,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676006215] [2023-08-24 03:05:51,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676006215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:51,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276523289] [2023-08-24 03:05:51,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:05:51,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:51,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:51,367 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 03:05:51,368 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 03:05:51,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 03:05:51,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:05:51,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 03:05:51,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:51,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:05:51,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276523289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:51,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:05:51,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-24 03:05:51,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477776296] [2023-08-24 03:05:51,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:51,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 03:05:51,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 03:05:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-08-24 03:05:51,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 284 [2023-08-24 03:05:51,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 224 transitions, 3304 flow. Second operand has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:51,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:51,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 284 [2023-08-24 03:05:51,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:51,943 INFO L124 PetriNetUnfolderBase]: 1043/1884 cut-off events. [2023-08-24 03:05:51,943 INFO L125 PetriNetUnfolderBase]: For 27927/27927 co-relation queries the response was YES. [2023-08-24 03:05:51,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13853 conditions, 1884 events. 1043/1884 cut-off events. For 27927/27927 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10558 event pairs, 194 based on Foata normal form. 2/1885 useless extension candidates. Maximal degree in co-relation 13757. Up to 1365 conditions per place. [2023-08-24 03:05:51,956 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 189 selfloop transitions, 69 changer transitions 14/272 dead transitions. [2023-08-24 03:05:51,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 272 transitions, 4383 flow [2023-08-24 03:05:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:05:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:05:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 968 transitions. [2023-08-24 03:05:51,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426056338028169 [2023-08-24 03:05:51,958 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 968 transitions. [2023-08-24 03:05:51,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 968 transitions. [2023-08-24 03:05:51,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:51,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 968 transitions. [2023-08-24 03:05:51,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:51,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:51,960 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:51,961 INFO L175 Difference]: Start difference. First operand has 157 places, 224 transitions, 3304 flow. Second operand 8 states and 968 transitions. [2023-08-24 03:05:51,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 272 transitions, 4383 flow [2023-08-24 03:05:52,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 272 transitions, 4150 flow, removed 92 selfloop flow, removed 6 redundant places. [2023-08-24 03:05:52,034 INFO L231 Difference]: Finished difference. Result has 159 places, 239 transitions, 3548 flow [2023-08-24 03:05:52,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3548, PETRI_PLACES=159, PETRI_TRANSITIONS=239} [2023-08-24 03:05:52,035 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2023-08-24 03:05:52,035 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 239 transitions, 3548 flow [2023-08-24 03:05:52,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:52,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:52,035 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] [2023-08-24 03:05:52,040 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 03:05:52,236 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 03:05:52,237 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 03:05:52,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:52,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1570608447, now seen corresponding path program 13 times [2023-08-24 03:05:52,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:52,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895514171] [2023-08-24 03:05:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:52,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:53,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895514171] [2023-08-24 03:05:53,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895514171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:05:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897256722] [2023-08-24 03:05:53,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:05:53,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:05:53,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:05:53,605 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 03:05:53,607 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 03:05:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:53,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 03:05:53,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:05:53,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:05:53,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-24 03:05:54,066 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 03:05:54,066 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 85 treesize of output 41 [2023-08-24 03:05:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:54,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:05:54,366 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:05:54,367 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 110 treesize of output 113 [2023-08-24 03:05:54,384 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:05:54,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 56 [2023-08-24 03:05:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:05:55,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897256722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:05:55,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:05:55,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-24 03:05:55,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794641406] [2023-08-24 03:05:55,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:05:55,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 03:05:55,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 03:05:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=934, Unknown=1, NotChecked=0, Total=1056 [2023-08-24 03:05:55,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 284 [2023-08-24 03:05:55,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 239 transitions, 3548 flow. Second operand has 33 states, 33 states have (on average 87.9090909090909) internal successors, (2901), 33 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:55,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:55,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 284 [2023-08-24 03:05:55,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:58,157 INFO L124 PetriNetUnfolderBase]: 1189/2236 cut-off events. [2023-08-24 03:05:58,157 INFO L125 PetriNetUnfolderBase]: For 35617/35617 co-relation queries the response was YES. [2023-08-24 03:05:58,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16176 conditions, 2236 events. 1189/2236 cut-off events. For 35617/35617 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13669 event pairs, 244 based on Foata normal form. 3/2238 useless extension candidates. Maximal degree in co-relation 16073. Up to 918 conditions per place. [2023-08-24 03:05:58,199 INFO L140 encePairwiseOnDemand]: 272/284 looper letters, 255 selfloop transitions, 92 changer transitions 22/369 dead transitions. [2023-08-24 03:05:58,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 369 transitions, 5399 flow [2023-08-24 03:05:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 03:05:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 03:05:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1882 transitions. [2023-08-24 03:05:58,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3313380281690141 [2023-08-24 03:05:58,206 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1882 transitions. [2023-08-24 03:05:58,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1882 transitions. [2023-08-24 03:05:58,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:58,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1882 transitions. [2023-08-24 03:05:58,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.1) internal successors, (1882), 20 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:58,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 284.0) internal successors, (5964), 21 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:58,214 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 284.0) internal successors, (5964), 21 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:58,214 INFO L175 Difference]: Start difference. First operand has 159 places, 239 transitions, 3548 flow. Second operand 20 states and 1882 transitions. [2023-08-24 03:05:58,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 369 transitions, 5399 flow [2023-08-24 03:05:58,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 369 transitions, 5236 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-08-24 03:05:58,317 INFO L231 Difference]: Finished difference. Result has 178 places, 257 transitions, 3928 flow [2023-08-24 03:05:58,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3928, PETRI_PLACES=178, PETRI_TRANSITIONS=257} [2023-08-24 03:05:58,317 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 149 predicate places. [2023-08-24 03:05:58,317 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 257 transitions, 3928 flow [2023-08-24 03:05:58,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 87.9090909090909) internal successors, (2901), 33 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:58,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:58,318 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] [2023-08-24 03:05:58,325 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 03:05:58,522 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 03:05:58,522 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 03:05:58,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash -527425867, now seen corresponding path program 1 times [2023-08-24 03:05:58,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:58,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108800881] [2023-08-24 03:05:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:58,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:58,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108800881] [2023-08-24 03:05:58,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108800881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:58,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:05:58,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 03:05:58,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720360793] [2023-08-24 03:05:58,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:58,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:05:58,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:05:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:05:58,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 03:05:58,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 257 transitions, 3928 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:58,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:58,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 03:05:58,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:58,912 INFO L124 PetriNetUnfolderBase]: 1148/2114 cut-off events. [2023-08-24 03:05:58,913 INFO L125 PetriNetUnfolderBase]: For 33713/33713 co-relation queries the response was YES. [2023-08-24 03:05:58,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15682 conditions, 2114 events. 1148/2114 cut-off events. For 33713/33713 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12405 event pairs, 140 based on Foata normal form. 84/2197 useless extension candidates. Maximal degree in co-relation 15580. Up to 1332 conditions per place. [2023-08-24 03:05:58,927 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 219 selfloop transitions, 92 changer transitions 0/311 dead transitions. [2023-08-24 03:05:58,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 311 transitions, 5122 flow [2023-08-24 03:05:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 03:05:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 03:05:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 796 transitions. [2023-08-24 03:05:58,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671361502347418 [2023-08-24 03:05:58,929 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 796 transitions. [2023-08-24 03:05:58,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 796 transitions. [2023-08-24 03:05:58,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:58,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 796 transitions. [2023-08-24 03:05:58,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.66666666666666) internal successors, (796), 6 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:58,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:58,931 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:58,931 INFO L175 Difference]: Start difference. First operand has 178 places, 257 transitions, 3928 flow. Second operand 6 states and 796 transitions. [2023-08-24 03:05:58,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 311 transitions, 5122 flow [2023-08-24 03:05:59,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 311 transitions, 4988 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-24 03:05:59,072 INFO L231 Difference]: Finished difference. Result has 174 places, 265 transitions, 4177 flow [2023-08-24 03:05:59,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4177, PETRI_PLACES=174, PETRI_TRANSITIONS=265} [2023-08-24 03:05:59,073 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2023-08-24 03:05:59,073 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 265 transitions, 4177 flow [2023-08-24 03:05:59,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:59,073 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] [2023-08-24 03:05:59,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 03:05:59,073 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 03:05:59,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:59,073 INFO L85 PathProgramCache]: Analyzing trace with hash 369718118, now seen corresponding path program 1 times [2023-08-24 03:05:59,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:59,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486515586] [2023-08-24 03:05:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:59,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:59,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:59,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486515586] [2023-08-24 03:05:59,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486515586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:59,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:05:59,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 03:05:59,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082262577] [2023-08-24 03:05:59,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:59,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:05:59,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:05:59,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:05:59,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 03:05:59,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 265 transitions, 4177 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:59,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 03:05:59,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:59,409 INFO L124 PetriNetUnfolderBase]: 910/1758 cut-off events. [2023-08-24 03:05:59,409 INFO L125 PetriNetUnfolderBase]: For 29983/29983 co-relation queries the response was YES. [2023-08-24 03:05:59,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13230 conditions, 1758 events. 910/1758 cut-off events. For 29983/29983 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10507 event pairs, 213 based on Foata normal form. 98/1855 useless extension candidates. Maximal degree in co-relation 13081. Up to 1163 conditions per place. [2023-08-24 03:05:59,420 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 171 selfloop transitions, 53 changer transitions 32/256 dead transitions. [2023-08-24 03:05:59,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 256 transitions, 4298 flow [2023-08-24 03:05:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:05:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:05:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-08-24 03:05:59,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676056338028169 [2023-08-24 03:05:59,421 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-08-24 03:05:59,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-08-24 03:05:59,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:59,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-08-24 03:05:59,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,423 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,423 INFO L175 Difference]: Start difference. First operand has 174 places, 265 transitions, 4177 flow. Second operand 5 states and 664 transitions. [2023-08-24 03:05:59,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 256 transitions, 4298 flow [2023-08-24 03:05:59,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 256 transitions, 4113 flow, removed 33 selfloop flow, removed 6 redundant places. [2023-08-24 03:05:59,499 INFO L231 Difference]: Finished difference. Result has 168 places, 206 transitions, 3087 flow [2023-08-24 03:05:59,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3087, PETRI_PLACES=168, PETRI_TRANSITIONS=206} [2023-08-24 03:05:59,500 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 139 predicate places. [2023-08-24 03:05:59,500 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 206 transitions, 3087 flow [2023-08-24 03:05:59,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:59,500 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] [2023-08-24 03:05:59,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 03:05:59,500 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 03:05:59,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2136284605, now seen corresponding path program 2 times [2023-08-24 03:05:59,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:59,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368261550] [2023-08-24 03:05:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:59,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:59,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:59,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368261550] [2023-08-24 03:05:59,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368261550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:59,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:05:59,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 03:05:59,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049603917] [2023-08-24 03:05:59,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:59,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:05:59,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:59,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:05:59,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:05:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 03:05:59,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 206 transitions, 3087 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:59,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 03:05:59,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:05:59,795 INFO L124 PetriNetUnfolderBase]: 916/1694 cut-off events. [2023-08-24 03:05:59,795 INFO L125 PetriNetUnfolderBase]: For 26450/26450 co-relation queries the response was YES. [2023-08-24 03:05:59,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12469 conditions, 1694 events. 916/1694 cut-off events. For 26450/26450 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9461 event pairs, 248 based on Foata normal form. 34/1727 useless extension candidates. Maximal degree in co-relation 12407. Up to 1377 conditions per place. [2023-08-24 03:05:59,806 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 171 selfloop transitions, 63 changer transitions 0/234 dead transitions. [2023-08-24 03:05:59,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 234 transitions, 3886 flow [2023-08-24 03:05:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:05:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:05:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 658 transitions. [2023-08-24 03:05:59,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46338028169014084 [2023-08-24 03:05:59,807 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 658 transitions. [2023-08-24 03:05:59,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 658 transitions. [2023-08-24 03:05:59,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:05:59,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 658 transitions. [2023-08-24 03:05:59,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,809 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,809 INFO L175 Difference]: Start difference. First operand has 168 places, 206 transitions, 3087 flow. Second operand 5 states and 658 transitions. [2023-08-24 03:05:59,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 234 transitions, 3886 flow [2023-08-24 03:05:59,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 234 transitions, 3685 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-08-24 03:05:59,866 INFO L231 Difference]: Finished difference. Result has 155 places, 211 transitions, 3116 flow [2023-08-24 03:05:59,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3116, PETRI_PLACES=155, PETRI_TRANSITIONS=211} [2023-08-24 03:05:59,867 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-24 03:05:59,867 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 211 transitions, 3116 flow [2023-08-24 03:05:59,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:05:59,867 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] [2023-08-24 03:05:59,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 03:05:59,867 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 03:05:59,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:05:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1674963003, now seen corresponding path program 3 times [2023-08-24 03:05:59,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:05:59,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921421487] [2023-08-24 03:05:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:05:59,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:05:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:05:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:05:59,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:05:59,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921421487] [2023-08-24 03:05:59,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921421487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:05:59,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:05:59,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 03:05:59,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138372885] [2023-08-24 03:05:59,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:05:59,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:05:59,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:05:59,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:05:59,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:05:59,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 03:05:59,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 211 transitions, 3116 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:05:59,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:05:59,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 03:05:59,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:00,157 INFO L124 PetriNetUnfolderBase]: 891/1665 cut-off events. [2023-08-24 03:06:00,157 INFO L125 PetriNetUnfolderBase]: For 24353/24353 co-relation queries the response was YES. [2023-08-24 03:06:00,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12125 conditions, 1665 events. 891/1665 cut-off events. For 24353/24353 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9379 event pairs, 255 based on Foata normal form. 18/1682 useless extension candidates. Maximal degree in co-relation 12067. Up to 1409 conditions per place. [2023-08-24 03:06:00,165 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 162 selfloop transitions, 55 changer transitions 2/219 dead transitions. [2023-08-24 03:06:00,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 219 transitions, 3608 flow [2023-08-24 03:06:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:06:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:06:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-08-24 03:06:00,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46056338028169014 [2023-08-24 03:06:00,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-08-24 03:06:00,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-08-24 03:06:00,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:00,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-08-24 03:06:00,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,168 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,168 INFO L175 Difference]: Start difference. First operand has 155 places, 211 transitions, 3116 flow. Second operand 5 states and 654 transitions. [2023-08-24 03:06:00,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 219 transitions, 3608 flow [2023-08-24 03:06:00,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 219 transitions, 3496 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-24 03:06:00,219 INFO L231 Difference]: Finished difference. Result has 155 places, 204 transitions, 3011 flow [2023-08-24 03:06:00,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3011, PETRI_PLACES=155, PETRI_TRANSITIONS=204} [2023-08-24 03:06:00,220 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-24 03:06:00,220 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 204 transitions, 3011 flow [2023-08-24 03:06:00,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:00,220 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] [2023-08-24 03:06:00,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 03:06:00,220 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 03:06:00,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:00,221 INFO L85 PathProgramCache]: Analyzing trace with hash -629040469, now seen corresponding path program 4 times [2023-08-24 03:06:00,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:00,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300664547] [2023-08-24 03:06:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:00,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:06:00,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:00,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300664547] [2023-08-24 03:06:00,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300664547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:06:00,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:06:00,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 03:06:00,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827181516] [2023-08-24 03:06:00,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:00,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:06:00,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:00,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:06:00,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:06:00,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 03:06:00,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 204 transitions, 3011 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:00,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 03:06:00,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:00,495 INFO L124 PetriNetUnfolderBase]: 890/1650 cut-off events. [2023-08-24 03:06:00,495 INFO L125 PetriNetUnfolderBase]: For 24340/24340 co-relation queries the response was YES. [2023-08-24 03:06:00,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11941 conditions, 1650 events. 890/1650 cut-off events. For 24340/24340 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9230 event pairs, 214 based on Foata normal form. 34/1683 useless extension candidates. Maximal degree in co-relation 11885. Up to 1251 conditions per place. [2023-08-24 03:06:00,505 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 161 selfloop transitions, 68 changer transitions 0/229 dead transitions. [2023-08-24 03:06:00,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 229 transitions, 3729 flow [2023-08-24 03:06:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:06:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:06:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 658 transitions. [2023-08-24 03:06:00,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46338028169014084 [2023-08-24 03:06:00,506 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 658 transitions. [2023-08-24 03:06:00,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 658 transitions. [2023-08-24 03:06:00,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:00,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 658 transitions. [2023-08-24 03:06:00,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,511 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,511 INFO L175 Difference]: Start difference. First operand has 155 places, 204 transitions, 3011 flow. Second operand 5 states and 658 transitions. [2023-08-24 03:06:00,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 229 transitions, 3729 flow [2023-08-24 03:06:00,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 229 transitions, 3604 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-24 03:06:00,561 INFO L231 Difference]: Finished difference. Result has 156 places, 207 transitions, 3114 flow [2023-08-24 03:06:00,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2802, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3114, PETRI_PLACES=156, PETRI_TRANSITIONS=207} [2023-08-24 03:06:00,562 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2023-08-24 03:06:00,562 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 207 transitions, 3114 flow [2023-08-24 03:06:00,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:00,562 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] [2023-08-24 03:06:00,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 03:06:00,562 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 03:06:00,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:00,563 INFO L85 PathProgramCache]: Analyzing trace with hash 961696553, now seen corresponding path program 5 times [2023-08-24 03:06:00,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:00,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010344926] [2023-08-24 03:06:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:00,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:06:00,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:00,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010344926] [2023-08-24 03:06:00,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010344926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:06:00,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:06:00,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 03:06:00,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892820332] [2023-08-24 03:06:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:00,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:06:00,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:00,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:06:00,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 03:06:00,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 284 [2023-08-24 03:06:00,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 207 transitions, 3114 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:00,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 284 [2023-08-24 03:06:00,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:00,846 INFO L124 PetriNetUnfolderBase]: 823/1528 cut-off events. [2023-08-24 03:06:00,846 INFO L125 PetriNetUnfolderBase]: For 23080/23080 co-relation queries the response was YES. [2023-08-24 03:06:00,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11657 conditions, 1528 events. 823/1528 cut-off events. For 23080/23080 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8364 event pairs, 150 based on Foata normal form. 36/1563 useless extension candidates. Maximal degree in co-relation 11600. Up to 903 conditions per place. [2023-08-24 03:06:00,855 INFO L140 encePairwiseOnDemand]: 278/284 looper letters, 151 selfloop transitions, 58 changer transitions 7/216 dead transitions. [2023-08-24 03:06:00,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 216 transitions, 3512 flow [2023-08-24 03:06:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:06:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:06:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 660 transitions. [2023-08-24 03:06:00,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647887323943662 [2023-08-24 03:06:00,856 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 660 transitions. [2023-08-24 03:06:00,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 660 transitions. [2023-08-24 03:06:00,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:00,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 660 transitions. [2023-08-24 03:06:00,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,858 INFO L175 Difference]: Start difference. First operand has 156 places, 207 transitions, 3114 flow. Second operand 5 states and 660 transitions. [2023-08-24 03:06:00,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 216 transitions, 3512 flow [2023-08-24 03:06:00,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 216 transitions, 3376 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-24 03:06:00,913 INFO L231 Difference]: Finished difference. Result has 151 places, 189 transitions, 2814 flow [2023-08-24 03:06:00,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2814, PETRI_PLACES=151, PETRI_TRANSITIONS=189} [2023-08-24 03:06:00,914 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2023-08-24 03:06:00,914 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 189 transitions, 2814 flow [2023-08-24 03:06:00,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:00,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:00,914 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:00,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-24 03:06:00,914 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 03:06:00,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:00,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1258033835, now seen corresponding path program 14 times [2023-08-24 03:06:00,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:00,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655973408] [2023-08-24 03:06:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:00,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:02,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:02,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655973408] [2023-08-24 03:06:02,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655973408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:02,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426897176] [2023-08-24 03:06:02,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:06:02,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:02,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:02,949 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 03:06:02,951 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 03:06:03,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 03:06:03,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:03,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:06:03,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:03,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:03,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-24 03:06:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:03,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:06:03,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426897176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:06:03,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:06:03,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-24 03:06:03,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606797559] [2023-08-24 03:06:03,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:03,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:03,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:03,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:03,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:06:03,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:03,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 189 transitions, 2814 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:03,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:03,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:03,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:03,730 INFO L124 PetriNetUnfolderBase]: 822/1525 cut-off events. [2023-08-24 03:06:03,730 INFO L125 PetriNetUnfolderBase]: For 23046/23046 co-relation queries the response was YES. [2023-08-24 03:06:03,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11441 conditions, 1525 events. 822/1525 cut-off events. For 23046/23046 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8346 event pairs, 154 based on Foata normal form. 1/1525 useless extension candidates. Maximal degree in co-relation 11388. Up to 966 conditions per place. [2023-08-24 03:06:03,738 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 149 selfloop transitions, 55 changer transitions 18/222 dead transitions. [2023-08-24 03:06:03,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 222 transitions, 3502 flow [2023-08-24 03:06:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:06:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:06:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 912 transitions. [2023-08-24 03:06:03,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014084507042254 [2023-08-24 03:06:03,739 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 912 transitions. [2023-08-24 03:06:03,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 912 transitions. [2023-08-24 03:06:03,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:03,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 912 transitions. [2023-08-24 03:06:03,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:03,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:03,741 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:03,741 INFO L175 Difference]: Start difference. First operand has 151 places, 189 transitions, 2814 flow. Second operand 8 states and 912 transitions. [2023-08-24 03:06:03,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 222 transitions, 3502 flow [2023-08-24 03:06:03,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 222 transitions, 3397 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 03:06:03,789 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 2813 flow [2023-08-24 03:06:03,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2813, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2023-08-24 03:06:03,789 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-24 03:06:03,789 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 2813 flow [2023-08-24 03:06:03,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:03,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:03,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:03,797 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 03:06:03,994 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,SelfDestructingSolverStorable20 [2023-08-24 03:06:03,994 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 03:06:03,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1857224947, now seen corresponding path program 15 times [2023-08-24 03:06:03,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:03,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934820292] [2023-08-24 03:06:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:03,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:04,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:04,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934820292] [2023-08-24 03:06:04,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934820292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:04,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492216917] [2023-08-24 03:06:04,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:06:04,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:04,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:04,903 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 03:06:04,905 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 03:06:05,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 03:06:05,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:05,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:06:05,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:05,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 03:06:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:05,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:06:05,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492216917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:06:05,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:06:05,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-24 03:06:05,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072659271] [2023-08-24 03:06:05,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:05,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:05,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-08-24 03:06:05,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:05,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 2813 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:05,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:05,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:05,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:05,611 INFO L124 PetriNetUnfolderBase]: 816/1514 cut-off events. [2023-08-24 03:06:05,611 INFO L125 PetriNetUnfolderBase]: For 22622/22622 co-relation queries the response was YES. [2023-08-24 03:06:05,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11413 conditions, 1514 events. 816/1514 cut-off events. For 22622/22622 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8264 event pairs, 154 based on Foata normal form. 1/1514 useless extension candidates. Maximal degree in co-relation 11357. Up to 965 conditions per place. [2023-08-24 03:06:05,619 INFO L140 encePairwiseOnDemand]: 275/284 looper letters, 149 selfloop transitions, 50 changer transitions 20/219 dead transitions. [2023-08-24 03:06:05,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 219 transitions, 3478 flow [2023-08-24 03:06:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:06:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:06:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 912 transitions. [2023-08-24 03:06:05,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014084507042254 [2023-08-24 03:06:05,620 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 912 transitions. [2023-08-24 03:06:05,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 912 transitions. [2023-08-24 03:06:05,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:05,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 912 transitions. [2023-08-24 03:06:05,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:05,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:05,623 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:05,623 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 2813 flow. Second operand 8 states and 912 transitions. [2023-08-24 03:06:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 219 transitions, 3478 flow [2023-08-24 03:06:05,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 219 transitions, 3368 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-24 03:06:05,668 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 2694 flow [2023-08-24 03:06:05,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2705, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2694, PETRI_PLACES=156, PETRI_TRANSITIONS=182} [2023-08-24 03:06:05,669 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2023-08-24 03:06:05,669 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 2694 flow [2023-08-24 03:06:05,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:05,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:05,669 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:05,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-24 03:06:05,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:05,874 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 03:06:05,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2119374045, now seen corresponding path program 16 times [2023-08-24 03:06:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901525892] [2023-08-24 03:06:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:07,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901525892] [2023-08-24 03:06:07,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901525892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692892927] [2023-08-24 03:06:07,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:06:07,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:07,623 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 03:06:07,624 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 03:06:07,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:06:07,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:07,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 03:06:07,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:07,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:07,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-24 03:06:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:06:07,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:06:08,101 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_929 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_929) c_~queue~0.base))) (or (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296))) (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296)))))) is different from false [2023-08-24 03:06:08,129 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:08,129 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 112 treesize of output 114 [2023-08-24 03:06:08,146 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:08,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-08-24 03:06:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:08,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692892927] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:08,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:06:08,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 29 [2023-08-24 03:06:08,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959650665] [2023-08-24 03:06:08,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:08,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:08,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:08,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=782, Unknown=1, NotChecked=56, Total=930 [2023-08-24 03:06:08,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:08,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 182 transitions, 2694 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:08,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:08,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:08,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:08,828 INFO L124 PetriNetUnfolderBase]: 803/1485 cut-off events. [2023-08-24 03:06:08,828 INFO L125 PetriNetUnfolderBase]: For 21989/21989 co-relation queries the response was YES. [2023-08-24 03:06:08,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11117 conditions, 1485 events. 803/1485 cut-off events. For 21989/21989 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8046 event pairs, 130 based on Foata normal form. 1/1485 useless extension candidates. Maximal degree in co-relation 11061. Up to 709 conditions per place. [2023-08-24 03:06:08,837 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 144 selfloop transitions, 63 changer transitions 20/227 dead transitions. [2023-08-24 03:06:08,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 227 transitions, 3560 flow [2023-08-24 03:06:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:06:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:06:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1023 transitions. [2023-08-24 03:06:08,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40023474178403756 [2023-08-24 03:06:08,839 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1023 transitions. [2023-08-24 03:06:08,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1023 transitions. [2023-08-24 03:06:08,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:08,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1023 transitions. [2023-08-24 03:06:08,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 113.66666666666667) internal successors, (1023), 9 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:08,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:08,842 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:08,842 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 2694 flow. Second operand 9 states and 1023 transitions. [2023-08-24 03:06:08,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 227 transitions, 3560 flow [2023-08-24 03:06:08,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 227 transitions, 3404 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-08-24 03:06:08,892 INFO L231 Difference]: Finished difference. Result has 155 places, 180 transitions, 2698 flow [2023-08-24 03:06:08,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2698, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2023-08-24 03:06:08,893 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-24 03:06:08,893 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 2698 flow [2023-08-24 03:06:08,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:08,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:08,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:08,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 03:06:09,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:09,098 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 03:06:09,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:09,099 INFO L85 PathProgramCache]: Analyzing trace with hash -68809131, now seen corresponding path program 17 times [2023-08-24 03:06:09,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:09,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749040980] [2023-08-24 03:06:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:09,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:10,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:10,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749040980] [2023-08-24 03:06:10,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749040980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:10,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132818480] [2023-08-24 03:06:10,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:06:10,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:10,482 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 03:06:10,484 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 03:06:10,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:06:10,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:10,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:06:10,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:10,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 03:06:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:06:10,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:06:11,051 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:11,052 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 87 treesize of output 89 [2023-08-24 03:06:11,154 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:11,155 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 20 treesize of output 7 [2023-08-24 03:06:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132818480] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:11,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:06:11,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-24 03:06:11,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032609090] [2023-08-24 03:06:11,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:11,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:11,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:11,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=890, Unknown=4, NotChecked=0, Total=992 [2023-08-24 03:06:11,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:11,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 2698 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:11,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:11,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:11,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:11,765 INFO L124 PetriNetUnfolderBase]: 793/1468 cut-off events. [2023-08-24 03:06:11,765 INFO L125 PetriNetUnfolderBase]: For 21301/21301 co-relation queries the response was YES. [2023-08-24 03:06:11,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11207 conditions, 1468 events. 793/1468 cut-off events. For 21301/21301 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7920 event pairs, 132 based on Foata normal form. 1/1468 useless extension candidates. Maximal degree in co-relation 11151. Up to 708 conditions per place. [2023-08-24 03:06:11,773 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 144 selfloop transitions, 58 changer transitions 24/226 dead transitions. [2023-08-24 03:06:11,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 226 transitions, 3527 flow [2023-08-24 03:06:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:06:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:06:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1025 transitions. [2023-08-24 03:06:11,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010172143974961 [2023-08-24 03:06:11,774 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1025 transitions. [2023-08-24 03:06:11,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1025 transitions. [2023-08-24 03:06:11,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:11,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1025 transitions. [2023-08-24 03:06:11,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 113.88888888888889) internal successors, (1025), 9 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:11,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:11,777 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:11,777 INFO L175 Difference]: Start difference. First operand has 155 places, 180 transitions, 2698 flow. Second operand 9 states and 1025 transitions. [2023-08-24 03:06:11,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 226 transitions, 3527 flow [2023-08-24 03:06:11,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 226 transitions, 3410 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-08-24 03:06:11,824 INFO L231 Difference]: Finished difference. Result has 156 places, 175 transitions, 2600 flow [2023-08-24 03:06:11,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2600, PETRI_PLACES=156, PETRI_TRANSITIONS=175} [2023-08-24 03:06:11,824 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2023-08-24 03:06:11,824 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 175 transitions, 2600 flow [2023-08-24 03:06:11,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:11,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:11,824 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:11,832 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 03:06:12,029 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,SelfDestructingSolverStorable23 [2023-08-24 03:06:12,029 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 03:06:12,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:12,030 INFO L85 PathProgramCache]: Analyzing trace with hash -194105519, now seen corresponding path program 18 times [2023-08-24 03:06:12,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:12,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807003432] [2023-08-24 03:06:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:12,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:14,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:14,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807003432] [2023-08-24 03:06:14,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807003432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:14,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624553336] [2023-08-24 03:06:14,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:06:14,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:14,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:14,439 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 03:06:14,441 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 03:06:14,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 03:06:14,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:14,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:06:14,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:14,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:14,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-08-24 03:06:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:14,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:06:14,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624553336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:06:14,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:06:14,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-24 03:06:14,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6386922] [2023-08-24 03:06:14,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:14,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:14,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:14,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:14,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:06:14,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:14,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 175 transitions, 2600 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:14,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:14,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:14,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:15,215 INFO L124 PetriNetUnfolderBase]: 786/1445 cut-off events. [2023-08-24 03:06:15,215 INFO L125 PetriNetUnfolderBase]: For 21124/21124 co-relation queries the response was YES. [2023-08-24 03:06:15,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11017 conditions, 1445 events. 786/1445 cut-off events. For 21124/21124 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7668 event pairs, 131 based on Foata normal form. 1/1445 useless extension candidates. Maximal degree in co-relation 10961. Up to 879 conditions per place. [2023-08-24 03:06:15,223 INFO L140 encePairwiseOnDemand]: 275/284 looper letters, 135 selfloop transitions, 47 changer transitions 21/203 dead transitions. [2023-08-24 03:06:15,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 203 transitions, 3217 flow [2023-08-24 03:06:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:06:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:06:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2023-08-24 03:06:15,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983274647887324 [2023-08-24 03:06:15,225 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2023-08-24 03:06:15,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2023-08-24 03:06:15,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:15,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2023-08-24 03:06:15,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.125) internal successors, (905), 8 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:15,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:15,227 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:15,227 INFO L175 Difference]: Start difference. First operand has 156 places, 175 transitions, 2600 flow. Second operand 8 states and 905 transitions. [2023-08-24 03:06:15,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 203 transitions, 3217 flow [2023-08-24 03:06:15,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 203 transitions, 3033 flow, removed 34 selfloop flow, removed 9 redundant places. [2023-08-24 03:06:15,275 INFO L231 Difference]: Finished difference. Result has 151 places, 169 transitions, 2473 flow [2023-08-24 03:06:15,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2473, PETRI_PLACES=151, PETRI_TRANSITIONS=169} [2023-08-24 03:06:15,275 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2023-08-24 03:06:15,275 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 169 transitions, 2473 flow [2023-08-24 03:06:15,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:15,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:15,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:15,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-24 03:06:15,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:15,480 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 03:06:15,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:15,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1761353845, now seen corresponding path program 19 times [2023-08-24 03:06:15,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:15,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630012815] [2023-08-24 03:06:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:15,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:16,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:16,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630012815] [2023-08-24 03:06:16,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630012815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:16,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324833956] [2023-08-24 03:06:16,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:06:16,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:16,805 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 03:06:16,807 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 03:06:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:16,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:06:16,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:17,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:17,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 03:06:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:06:17,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:06:17,351 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:17,352 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 85 treesize of output 87 [2023-08-24 03:06:17,355 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:17,355 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 20 treesize of output 7 [2023-08-24 03:06:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324833956] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:17,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:06:17,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-24 03:06:17,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289479401] [2023-08-24 03:06:17,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:17,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:17,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:17,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=892, Unknown=4, NotChecked=0, Total=992 [2023-08-24 03:06:17,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:17,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 169 transitions, 2473 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:17,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:17,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:17,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:18,135 INFO L124 PetriNetUnfolderBase]: 778/1431 cut-off events. [2023-08-24 03:06:18,135 INFO L125 PetriNetUnfolderBase]: For 19832/19832 co-relation queries the response was YES. [2023-08-24 03:06:18,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10536 conditions, 1431 events. 778/1431 cut-off events. For 19832/19832 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7584 event pairs, 109 based on Foata normal form. 1/1431 useless extension candidates. Maximal degree in co-relation 10482. Up to 643 conditions per place. [2023-08-24 03:06:18,145 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 131 selfloop transitions, 55 changer transitions 29/215 dead transitions. [2023-08-24 03:06:18,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 215 transitions, 3228 flow [2023-08-24 03:06:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 03:06:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 03:06:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1129 transitions. [2023-08-24 03:06:18,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39753521126760566 [2023-08-24 03:06:18,146 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1129 transitions. [2023-08-24 03:06:18,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1129 transitions. [2023-08-24 03:06:18,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:18,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1129 transitions. [2023-08-24 03:06:18,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 112.9) internal successors, (1129), 10 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:18,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 284.0) internal successors, (3124), 11 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:18,149 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 284.0) internal successors, (3124), 11 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:18,149 INFO L175 Difference]: Start difference. First operand has 151 places, 169 transitions, 2473 flow. Second operand 10 states and 1129 transitions. [2023-08-24 03:06:18,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 215 transitions, 3228 flow [2023-08-24 03:06:18,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 215 transitions, 3099 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-08-24 03:06:18,198 INFO L231 Difference]: Finished difference. Result has 150 places, 163 transitions, 2364 flow [2023-08-24 03:06:18,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2364, PETRI_PLACES=150, PETRI_TRANSITIONS=163} [2023-08-24 03:06:18,199 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2023-08-24 03:06:18,199 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 163 transitions, 2364 flow [2023-08-24 03:06:18,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:18,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:18,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:18,204 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 03:06:18,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:18,404 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 03:06:18,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:18,404 INFO L85 PathProgramCache]: Analyzing trace with hash 164084765, now seen corresponding path program 20 times [2023-08-24 03:06:18,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:18,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364449625] [2023-08-24 03:06:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:18,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:19,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:19,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364449625] [2023-08-24 03:06:19,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364449625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:19,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655029527] [2023-08-24 03:06:19,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:06:19,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:19,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:19,168 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 03:06:19,173 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 03:06:19,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 03:06:19,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:19,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:06:19,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:19,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:19,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-08-24 03:06:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:19,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:06:19,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655029527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:06:19,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:06:19,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-24 03:06:19,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478719870] [2023-08-24 03:06:19,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:19,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:19,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-08-24 03:06:19,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:19,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 163 transitions, 2364 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:19,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:19,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:19,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:19,835 INFO L124 PetriNetUnfolderBase]: 763/1392 cut-off events. [2023-08-24 03:06:19,835 INFO L125 PetriNetUnfolderBase]: For 19539/19539 co-relation queries the response was YES. [2023-08-24 03:06:19,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10206 conditions, 1392 events. 763/1392 cut-off events. For 19539/19539 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7212 event pairs, 129 based on Foata normal form. 1/1392 useless extension candidates. Maximal degree in co-relation 10154. Up to 839 conditions per place. [2023-08-24 03:06:19,843 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 128 selfloop transitions, 50 changer transitions 16/194 dead transitions. [2023-08-24 03:06:19,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 194 transitions, 2966 flow [2023-08-24 03:06:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:06:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:06:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 909 transitions. [2023-08-24 03:06:19,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40008802816901406 [2023-08-24 03:06:19,844 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 909 transitions. [2023-08-24 03:06:19,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 909 transitions. [2023-08-24 03:06:19,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:19,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 909 transitions. [2023-08-24 03:06:19,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.625) internal successors, (909), 8 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:19,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:19,846 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:19,846 INFO L175 Difference]: Start difference. First operand has 150 places, 163 transitions, 2364 flow. Second operand 8 states and 909 transitions. [2023-08-24 03:06:19,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 194 transitions, 2966 flow [2023-08-24 03:06:19,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 194 transitions, 2805 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-08-24 03:06:19,902 INFO L231 Difference]: Finished difference. Result has 144 places, 160 transitions, 2285 flow [2023-08-24 03:06:19,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2285, PETRI_PLACES=144, PETRI_TRANSITIONS=160} [2023-08-24 03:06:19,902 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-08-24 03:06:19,902 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 160 transitions, 2285 flow [2023-08-24 03:06:19,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:19,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:19,903 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:19,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-24 03:06:20,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:20,108 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 03:06:20,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:20,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1637841409, now seen corresponding path program 21 times [2023-08-24 03:06:20,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:20,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684317285] [2023-08-24 03:06:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:20,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:22,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:22,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684317285] [2023-08-24 03:06:22,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684317285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:22,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629428917] [2023-08-24 03:06:22,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:06:22,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:22,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:22,521 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 03:06:22,523 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 03:06:22,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 03:06:22,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:22,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 03:06:22,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:22,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:22,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-24 03:06:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:22,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:06:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629428917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:06:22,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:06:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-24 03:06:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20238507] [2023-08-24 03:06:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:06:22,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:22,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 160 transitions, 2285 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:22,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:22,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:22,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:23,236 INFO L124 PetriNetUnfolderBase]: 759/1385 cut-off events. [2023-08-24 03:06:23,236 INFO L125 PetriNetUnfolderBase]: For 18118/18118 co-relation queries the response was YES. [2023-08-24 03:06:23,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10016 conditions, 1385 events. 759/1385 cut-off events. For 18118/18118 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7182 event pairs, 129 based on Foata normal form. 1/1385 useless extension candidates. Maximal degree in co-relation 9965. Up to 830 conditions per place. [2023-08-24 03:06:23,243 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 122 selfloop transitions, 49 changer transitions 20/191 dead transitions. [2023-08-24 03:06:23,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 191 transitions, 2873 flow [2023-08-24 03:06:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 03:06:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 03:06:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 909 transitions. [2023-08-24 03:06:23,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40008802816901406 [2023-08-24 03:06:23,245 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 909 transitions. [2023-08-24 03:06:23,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 909 transitions. [2023-08-24 03:06:23,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:23,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 909 transitions. [2023-08-24 03:06:23,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.625) internal successors, (909), 8 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:23,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:23,247 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:23,247 INFO L175 Difference]: Start difference. First operand has 144 places, 160 transitions, 2285 flow. Second operand 8 states and 909 transitions. [2023-08-24 03:06:23,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 191 transitions, 2873 flow [2023-08-24 03:06:23,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 191 transitions, 2769 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-08-24 03:06:23,285 INFO L231 Difference]: Finished difference. Result has 144 places, 157 transitions, 2243 flow [2023-08-24 03:06:23,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2243, PETRI_PLACES=144, PETRI_TRANSITIONS=157} [2023-08-24 03:06:23,285 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-08-24 03:06:23,285 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 157 transitions, 2243 flow [2023-08-24 03:06:23,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:23,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:23,286 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:23,293 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 03:06:23,490 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,SelfDestructingSolverStorable27 [2023-08-24 03:06:23,491 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 03:06:23,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:23,491 INFO L85 PathProgramCache]: Analyzing trace with hash 143346487, now seen corresponding path program 22 times [2023-08-24 03:06:23,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:23,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068762753] [2023-08-24 03:06:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:23,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:25,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:25,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068762753] [2023-08-24 03:06:25,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068762753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:25,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453100083] [2023-08-24 03:06:25,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:06:25,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:25,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:25,546 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 03:06:25,549 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 03:06:25,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:06:25,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:25,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:06:25,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:25,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:25,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 03:06:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:06:25,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:06:26,028 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1247 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1247) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))) is different from false [2023-08-24 03:06:26,116 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:26,117 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 87 treesize of output 89 [2023-08-24 03:06:26,121 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:26,121 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 20 treesize of output 7 [2023-08-24 03:06:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:26,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453100083] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:26,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:06:26,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-24 03:06:26,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003746440] [2023-08-24 03:06:26,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:26,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:26,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:26,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:26,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=842, Unknown=1, NotChecked=58, Total=992 [2023-08-24 03:06:26,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:26,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 157 transitions, 2243 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:26,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:26,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:26,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:26,981 INFO L124 PetriNetUnfolderBase]: 753/1376 cut-off events. [2023-08-24 03:06:26,981 INFO L125 PetriNetUnfolderBase]: For 18134/18134 co-relation queries the response was YES. [2023-08-24 03:06:26,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9950 conditions, 1376 events. 753/1376 cut-off events. For 18134/18134 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7151 event pairs, 107 based on Foata normal form. 1/1376 useless extension candidates. Maximal degree in co-relation 9899. Up to 610 conditions per place. [2023-08-24 03:06:26,988 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 125 selfloop transitions, 53 changer transitions 23/201 dead transitions. [2023-08-24 03:06:26,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 201 transitions, 2981 flow [2023-08-24 03:06:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:06:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:06:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1022 transitions. [2023-08-24 03:06:26,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998435054773083 [2023-08-24 03:06:26,990 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1022 transitions. [2023-08-24 03:06:26,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1022 transitions. [2023-08-24 03:06:26,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:26,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1022 transitions. [2023-08-24 03:06:26,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 113.55555555555556) internal successors, (1022), 9 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:26,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:26,992 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:26,992 INFO L175 Difference]: Start difference. First operand has 144 places, 157 transitions, 2243 flow. Second operand 9 states and 1022 transitions. [2023-08-24 03:06:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 201 transitions, 2981 flow [2023-08-24 03:06:27,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 201 transitions, 2858 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-08-24 03:06:27,030 INFO L231 Difference]: Finished difference. Result has 143 places, 152 transitions, 2151 flow [2023-08-24 03:06:27,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2151, PETRI_PLACES=143, PETRI_TRANSITIONS=152} [2023-08-24 03:06:27,032 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2023-08-24 03:06:27,032 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 152 transitions, 2151 flow [2023-08-24 03:06:27,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:27,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:27,032 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:06:27,037 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 03:06:27,237 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,SelfDestructingSolverStorable28 [2023-08-24 03:06:27,238 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 03:06:27,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:27,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2069380565, now seen corresponding path program 23 times [2023-08-24 03:06:27,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:27,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36608982] [2023-08-24 03:06:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:27,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:28,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:28,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36608982] [2023-08-24 03:06:28,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36608982] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:28,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196735923] [2023-08-24 03:06:28,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:06:28,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:28,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:28,928 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 03:06:28,930 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 03:06:29,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:06:29,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:29,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 03:06:29,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:29,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:06:29,251 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-08-24 03:06:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:06:29,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:06:29,488 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:29,489 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 87 treesize of output 89 [2023-08-24 03:06:29,530 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:29,530 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 20 treesize of output 7 [2023-08-24 03:06:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 03:06:29,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196735923] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:29,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:06:29,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 30 [2023-08-24 03:06:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683001441] [2023-08-24 03:06:29,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:06:29,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 03:06:29,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 03:06:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=897, Unknown=2, NotChecked=0, Total=992 [2023-08-24 03:06:29,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-24 03:06:29,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 152 transitions, 2151 flow. Second operand has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:29,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:29,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-24 03:06:29,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:30,208 INFO L124 PetriNetUnfolderBase]: 742/1347 cut-off events. [2023-08-24 03:06:30,208 INFO L125 PetriNetUnfolderBase]: For 17994/17994 co-relation queries the response was YES. [2023-08-24 03:06:30,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9974 conditions, 1347 events. 742/1347 cut-off events. For 17994/17994 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6834 event pairs, 123 based on Foata normal form. 1/1347 useless extension candidates. Maximal degree in co-relation 9923. Up to 712 conditions per place. [2023-08-24 03:06:30,215 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 125 selfloop transitions, 46 changer transitions 26/197 dead transitions. [2023-08-24 03:06:30,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 197 transitions, 2889 flow [2023-08-24 03:06:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 03:06:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 03:06:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1021 transitions. [2023-08-24 03:06:30,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399452269170579 [2023-08-24 03:06:30,217 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1021 transitions. [2023-08-24 03:06:30,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1021 transitions. [2023-08-24 03:06:30,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:30,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1021 transitions. [2023-08-24 03:06:30,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 113.44444444444444) internal successors, (1021), 9 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:30,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:30,219 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:30,219 INFO L175 Difference]: Start difference. First operand has 143 places, 152 transitions, 2151 flow. Second operand 9 states and 1021 transitions. [2023-08-24 03:06:30,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 197 transitions, 2889 flow [2023-08-24 03:06:30,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 197 transitions, 2726 flow, removed 40 selfloop flow, removed 9 redundant places. [2023-08-24 03:06:30,257 INFO L231 Difference]: Finished difference. Result has 139 places, 147 transitions, 2026 flow [2023-08-24 03:06:30,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2026, PETRI_PLACES=139, PETRI_TRANSITIONS=147} [2023-08-24 03:06:30,258 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 110 predicate places. [2023-08-24 03:06:30,258 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 147 transitions, 2026 flow [2023-08-24 03:06:30,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.0) internal successors, (1070), 10 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:30,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:30,258 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] [2023-08-24 03:06:30,265 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 03:06:30,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:30,463 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 03:06:30,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:30,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1775559202, now seen corresponding path program 1 times [2023-08-24 03:06:30,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:30,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463756049] [2023-08-24 03:06:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:30,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:31,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:31,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463756049] [2023-08-24 03:06:31,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463756049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:31,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974460121] [2023-08-24 03:06:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:31,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:31,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:31,422 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 03:06:31,424 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 03:06:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:31,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 03:06:31,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:31,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:06:32,009 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:32,010 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 58 treesize of output 60 [2023-08-24 03:06:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974460121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:06:32,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:06:32,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-24 03:06:32,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733872030] [2023-08-24 03:06:32,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:06:32,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 03:06:32,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:32,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 03:06:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 03:06:32,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:06:32,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 147 transitions, 2026 flow. Second operand has 37 states, 37 states have (on average 85.86486486486487) internal successors, (3177), 37 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 03:06:32,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:32,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:06:32,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:36,000 INFO L124 PetriNetUnfolderBase]: 1109/1897 cut-off events. [2023-08-24 03:06:36,001 INFO L125 PetriNetUnfolderBase]: For 25708/25708 co-relation queries the response was YES. [2023-08-24 03:06:36,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13700 conditions, 1897 events. 1109/1897 cut-off events. For 25708/25708 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9712 event pairs, 146 based on Foata normal form. 3/1899 useless extension candidates. Maximal degree in co-relation 13652. Up to 367 conditions per place. [2023-08-24 03:06:36,011 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 211 selfloop transitions, 134 changer transitions 39/384 dead transitions. [2023-08-24 03:06:36,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 384 transitions, 4998 flow [2023-08-24 03:06:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 03:06:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 03:06:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3126 transitions. [2023-08-24 03:06:36,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3237365368682684 [2023-08-24 03:06:36,016 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3126 transitions. [2023-08-24 03:06:36,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3126 transitions. [2023-08-24 03:06:36,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:36,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3126 transitions. [2023-08-24 03:06:36,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.94117647058823) internal successors, (3126), 34 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:36,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 284.0) internal successors, (9940), 35 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:36,023 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 284.0) internal successors, (9940), 35 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:36,023 INFO L175 Difference]: Start difference. First operand has 139 places, 147 transitions, 2026 flow. Second operand 34 states and 3126 transitions. [2023-08-24 03:06:36,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 384 transitions, 4998 flow [2023-08-24 03:06:36,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 384 transitions, 4662 flow, removed 77 selfloop flow, removed 9 redundant places. [2023-08-24 03:06:36,076 INFO L231 Difference]: Finished difference. Result has 176 places, 222 transitions, 3468 flow [2023-08-24 03:06:36,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3468, PETRI_PLACES=176, PETRI_TRANSITIONS=222} [2023-08-24 03:06:36,076 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2023-08-24 03:06:36,076 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 222 transitions, 3468 flow [2023-08-24 03:06:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 85.86486486486487) internal successors, (3177), 37 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 03:06:36,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:36,077 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] [2023-08-24 03:06:36,087 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 03:06:36,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:36,285 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 03:06:36,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1495873550, now seen corresponding path program 2 times [2023-08-24 03:06:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:36,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332246303] [2023-08-24 03:06:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:36,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:37,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:37,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332246303] [2023-08-24 03:06:37,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332246303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:37,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111967351] [2023-08-24 03:06:37,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:06:37,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:37,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:37,321 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 03:06:37,323 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 03:06:37,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:06:37,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:37,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 03:06:37,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:37,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 03:06:37,573 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 03:06:37,606 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 03:06:37,633 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 03:06:37,972 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 03:06:37,972 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 82 treesize of output 38 [2023-08-24 03:06:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:37,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:06:38,928 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:38,928 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 133 treesize of output 97 [2023-08-24 03:06:38,976 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:06:38,976 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 956 treesize of output 926 [2023-08-24 03:06:39,047 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:06:39,047 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 435 treesize of output 421 [2023-08-24 03:06:39,107 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:06:39,108 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 385 treesize of output 321 [2023-08-24 03:06:39,166 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:06:39,167 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 222 treesize of output 233 [2023-08-24 03:06:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:40,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111967351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:06:40,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:06:40,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 03:06:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566281664] [2023-08-24 03:06:40,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:06:40,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 03:06:40,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 03:06:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1431, Unknown=6, NotChecked=0, Total=1640 [2023-08-24 03:06:40,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:06:40,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 222 transitions, 3468 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:40,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:40,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:06:40,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:06:43,444 INFO L124 PetriNetUnfolderBase]: 1317/2376 cut-off events. [2023-08-24 03:06:43,444 INFO L125 PetriNetUnfolderBase]: For 33144/33144 co-relation queries the response was YES. [2023-08-24 03:06:43,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17522 conditions, 2376 events. 1317/2376 cut-off events. For 33144/33144 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13736 event pairs, 305 based on Foata normal form. 2/2377 useless extension candidates. Maximal degree in co-relation 17459. Up to 996 conditions per place. [2023-08-24 03:06:43,460 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 272 selfloop transitions, 68 changer transitions 17/357 dead transitions. [2023-08-24 03:06:43,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 357 transitions, 5413 flow [2023-08-24 03:06:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 03:06:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 03:06:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1828 transitions. [2023-08-24 03:06:43,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321830985915493 [2023-08-24 03:06:43,462 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1828 transitions. [2023-08-24 03:06:43,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1828 transitions. [2023-08-24 03:06:43,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:06:43,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1828 transitions. [2023-08-24 03:06:43,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 91.4) internal successors, (1828), 20 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:43,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 284.0) internal successors, (5964), 21 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:43,466 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 284.0) internal successors, (5964), 21 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:43,466 INFO L175 Difference]: Start difference. First operand has 176 places, 222 transitions, 3468 flow. Second operand 20 states and 1828 transitions. [2023-08-24 03:06:43,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 357 transitions, 5413 flow [2023-08-24 03:06:43,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 357 transitions, 4916 flow, removed 161 selfloop flow, removed 16 redundant places. [2023-08-24 03:06:43,570 INFO L231 Difference]: Finished difference. Result has 183 places, 246 transitions, 3626 flow [2023-08-24 03:06:43,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3626, PETRI_PLACES=183, PETRI_TRANSITIONS=246} [2023-08-24 03:06:43,571 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 154 predicate places. [2023-08-24 03:06:43,571 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 246 transitions, 3626 flow [2023-08-24 03:06:43,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:43,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:06:43,572 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] [2023-08-24 03:06:43,577 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 03:06:43,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:43,777 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 03:06:43,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:06:43,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2074640676, now seen corresponding path program 3 times [2023-08-24 03:06:43,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:06:43,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467457808] [2023-08-24 03:06:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:06:43,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:06:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:06:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:44,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:06:44,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467457808] [2023-08-24 03:06:44,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467457808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:06:44,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176252492] [2023-08-24 03:06:44,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:06:44,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:06:44,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:06:44,669 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 03:06:44,670 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 03:06:45,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:06:45,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:06:45,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-24 03:06:45,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:06:45,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 03:06:45,118 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 03:06:45,148 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 03:06:45,177 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 03:06:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:45,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:06:46,050 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:46,052 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 134 treesize of output 98 [2023-08-24 03:06:46,086 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-24 03:06:46,086 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 3948 treesize of output 3699 [2023-08-24 03:06:46,104 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:06:46,105 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:06:46,114 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:06:46,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 328 treesize of output 322 [2023-08-24 03:06:46,148 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 03:06:46,148 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 416 treesize of output 332 [2023-08-24 03:06:46,181 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 03:06:46,181 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 249 treesize of output 217 [2023-08-24 03:06:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:06:46,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176252492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:06:46,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:06:46,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-08-24 03:06:46,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910924301] [2023-08-24 03:06:46,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:06:46,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 03:06:46,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:06:46,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 03:06:46,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1281, Unknown=10, NotChecked=0, Total=1482 [2023-08-24 03:06:46,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:06:46,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 246 transitions, 3626 flow. Second operand has 39 states, 39 states have (on average 85.61538461538461) internal successors, (3339), 39 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:06:46,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:06:46,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:06:46,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:07:05,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:07:12,162 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 03:07:17,853 INFO L124 PetriNetUnfolderBase]: 2010/3459 cut-off events. [2023-08-24 03:07:17,853 INFO L125 PetriNetUnfolderBase]: For 47493/47493 co-relation queries the response was YES. [2023-08-24 03:07:17,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25220 conditions, 3459 events. 2010/3459 cut-off events. For 47493/47493 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20532 event pairs, 233 based on Foata normal form. 3/3461 useless extension candidates. Maximal degree in co-relation 25156. Up to 717 conditions per place. [2023-08-24 03:07:17,874 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 459 selfloop transitions, 346 changer transitions 39/844 dead transitions. [2023-08-24 03:07:17,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 844 transitions, 12341 flow [2023-08-24 03:07:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-24 03:07:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-24 03:07:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5973 transitions. [2023-08-24 03:07:17,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31866197183098594 [2023-08-24 03:07:17,882 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5973 transitions. [2023-08-24 03:07:17,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5973 transitions. [2023-08-24 03:07:17,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:07:17,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5973 transitions. [2023-08-24 03:07:17,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 90.5) internal successors, (5973), 66 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:17,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 284.0) internal successors, (19028), 67 states have internal predecessors, (19028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:17,900 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 284.0) internal successors, (19028), 67 states have internal predecessors, (19028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:17,900 INFO L175 Difference]: Start difference. First operand has 183 places, 246 transitions, 3626 flow. Second operand 66 states and 5973 transitions. [2023-08-24 03:07:17,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 844 transitions, 12341 flow [2023-08-24 03:07:18,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 844 transitions, 12182 flow, removed 51 selfloop flow, removed 10 redundant places. [2023-08-24 03:07:18,070 INFO L231 Difference]: Finished difference. Result has 272 places, 500 transitions, 8990 flow [2023-08-24 03:07:18,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=8990, PETRI_PLACES=272, PETRI_TRANSITIONS=500} [2023-08-24 03:07:18,070 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 243 predicate places. [2023-08-24 03:07:18,070 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 500 transitions, 8990 flow [2023-08-24 03:07:18,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 85.61538461538461) internal successors, (3339), 39 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:18,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:07:18,071 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] [2023-08-24 03:07:18,076 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 03:07:18,275 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,SelfDestructingSolverStorable32 [2023-08-24 03:07:18,276 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 03:07:18,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:07:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1762148586, now seen corresponding path program 4 times [2023-08-24 03:07:18,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:07:18,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927982812] [2023-08-24 03:07:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:07:18,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:07:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:07:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:07:19,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:07:19,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927982812] [2023-08-24 03:07:19,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927982812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:07:19,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127934263] [2023-08-24 03:07:19,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:07:19,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:07:19,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:07:19,364 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 03:07:19,365 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 03:07:19,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:07:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:07:19,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-24 03:07:19,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:07:20,151 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 03:07:20,151 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 82 treesize of output 38 [2023-08-24 03:07:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:07:20,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:07:20,486 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:07:20,486 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 59 treesize of output 62 [2023-08-24 03:07:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:07:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127934263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:07:21,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:07:21,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-24 03:07:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701384022] [2023-08-24 03:07:21,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:07:21,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 03:07:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:07:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 03:07:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 03:07:21,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 03:07:21,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 500 transitions, 8990 flow. Second operand has 36 states, 36 states have (on average 95.91666666666667) internal successors, (3453), 36 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:21,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:07:21,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 03:07:21,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:07:25,172 INFO L124 PetriNetUnfolderBase]: 2010/3459 cut-off events. [2023-08-24 03:07:25,172 INFO L125 PetriNetUnfolderBase]: For 58249/58249 co-relation queries the response was YES. [2023-08-24 03:07:25,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27881 conditions, 3459 events. 2010/3459 cut-off events. For 58249/58249 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20447 event pairs, 401 based on Foata normal form. 1/3460 useless extension candidates. Maximal degree in co-relation 27783. Up to 1816 conditions per place. [2023-08-24 03:07:25,201 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 485 selfloop transitions, 145 changer transitions 13/643 dead transitions. [2023-08-24 03:07:25,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 643 transitions, 11336 flow [2023-08-24 03:07:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 03:07:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 03:07:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2543 transitions. [2023-08-24 03:07:25,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358169014084507 [2023-08-24 03:07:25,203 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2543 transitions. [2023-08-24 03:07:25,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2543 transitions. [2023-08-24 03:07:25,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:07:25,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2543 transitions. [2023-08-24 03:07:25,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 101.72) internal successors, (2543), 25 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:25,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 284.0) internal successors, (7384), 26 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:25,209 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 284.0) internal successors, (7384), 26 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:25,209 INFO L175 Difference]: Start difference. First operand has 272 places, 500 transitions, 8990 flow. Second operand 25 states and 2543 transitions. [2023-08-24 03:07:25,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 643 transitions, 11336 flow [2023-08-24 03:07:25,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 643 transitions, 10346 flow, removed 399 selfloop flow, removed 15 redundant places. [2023-08-24 03:07:25,518 INFO L231 Difference]: Finished difference. Result has 285 places, 522 transitions, 8916 flow [2023-08-24 03:07:25,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=8175, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8916, PETRI_PLACES=285, PETRI_TRANSITIONS=522} [2023-08-24 03:07:25,518 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 256 predicate places. [2023-08-24 03:07:25,518 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 522 transitions, 8916 flow [2023-08-24 03:07:25,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 95.91666666666667) internal successors, (3453), 36 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:25,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:07:25,519 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] [2023-08-24 03:07:25,525 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 03:07:25,723 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,SelfDestructingSolverStorable33 [2023-08-24 03:07:25,724 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 03:07:25,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:07:25,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1169573192, now seen corresponding path program 5 times [2023-08-24 03:07:25,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:07:25,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076683033] [2023-08-24 03:07:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:07:25,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:07:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:07:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:07:26,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:07:26,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076683033] [2023-08-24 03:07:26,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076683033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:07:26,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566878558] [2023-08-24 03:07:26,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:07:26,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:07:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:07:26,621 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 03:07:26,623 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 03:07:26,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:07:26,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:07:26,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 03:07:26,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:07:26,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:07:26,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-08-24 03:07:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:07:27,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:07:27,198 INFO L322 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-08-24 03:07:27,198 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 112 treesize of output 82 [2023-08-24 03:07:27,204 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:07:27,205 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 58 treesize of output 38 [2023-08-24 03:07:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:07:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566878558] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:07:27,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:07:27,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 34 [2023-08-24 03:07:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173961717] [2023-08-24 03:07:27,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:07:27,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 03:07:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:07:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 03:07:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1104, Unknown=1, NotChecked=0, Total=1260 [2023-08-24 03:07:27,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:07:27,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 522 transitions, 8916 flow. Second operand has 36 states, 36 states have (on average 85.88888888888889) internal successors, (3092), 36 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:27,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:07:27,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:07:27,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:07:48,682 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 03:07:55,889 INFO L124 PetriNetUnfolderBase]: 2134/3775 cut-off events. [2023-08-24 03:07:55,889 INFO L125 PetriNetUnfolderBase]: For 53709/53709 co-relation queries the response was YES. [2023-08-24 03:07:55,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29062 conditions, 3775 events. 2134/3775 cut-off events. For 53709/53709 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23595 event pairs, 131 based on Foata normal form. 10/3785 useless extension candidates. Maximal degree in co-relation 28961. Up to 603 conditions per place. [2023-08-24 03:07:55,919 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 374 selfloop transitions, 409 changer transitions 82/865 dead transitions. [2023-08-24 03:07:55,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 865 transitions, 12880 flow [2023-08-24 03:07:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-24 03:07:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-24 03:07:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6242 transitions. [2023-08-24 03:07:55,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3185343947744438 [2023-08-24 03:07:55,924 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6242 transitions. [2023-08-24 03:07:55,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6242 transitions. [2023-08-24 03:07:55,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:07:55,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6242 transitions. [2023-08-24 03:07:55,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 90.46376811594203) internal successors, (6242), 69 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:55,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 284.0) internal successors, (19880), 70 states have internal predecessors, (19880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:55,938 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 284.0) internal successors, (19880), 70 states have internal predecessors, (19880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:55,938 INFO L175 Difference]: Start difference. First operand has 285 places, 522 transitions, 8916 flow. Second operand 69 states and 6242 transitions. [2023-08-24 03:07:55,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 865 transitions, 12880 flow [2023-08-24 03:07:56,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 865 transitions, 12726 flow, removed 30 selfloop flow, removed 11 redundant places. [2023-08-24 03:07:56,253 INFO L231 Difference]: Finished difference. Result has 354 places, 547 transitions, 10152 flow [2023-08-24 03:07:56,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=8774, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=10152, PETRI_PLACES=354, PETRI_TRANSITIONS=547} [2023-08-24 03:07:56,253 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 325 predicate places. [2023-08-24 03:07:56,253 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 547 transitions, 10152 flow [2023-08-24 03:07:56,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 85.88888888888889) internal successors, (3092), 36 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:56,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:07:56,254 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] [2023-08-24 03:07:56,261 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 03:07:56,459 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,SelfDestructingSolverStorable34 [2023-08-24 03:07:56,459 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 03:07:56,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:07:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1472493682, now seen corresponding path program 6 times [2023-08-24 03:07:56,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:07:56,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602485526] [2023-08-24 03:07:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:07:56,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:07:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:07:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:07:57,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:07:57,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602485526] [2023-08-24 03:07:57,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602485526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:07:57,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138524773] [2023-08-24 03:07:57,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:07:57,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:07:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:07:57,651 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 03:07:57,652 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 03:07:57,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 03:07:57,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:07:57,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-24 03:07:57,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:07:57,892 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 03:07:57,928 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 03:07:57,966 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 03:07:57,999 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 03:07:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:07:58,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:07:59,028 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:07:59,028 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 136 treesize of output 100 [2023-08-24 03:07:59,066 INFO L322 Elim1Store]: treesize reduction 5, result has 73.7 percent of original size [2023-08-24 03:07:59,066 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 1004 treesize of output 949 [2023-08-24 03:07:59,089 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-24 03:07:59,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 458 treesize of output 364 [2023-08-24 03:07:59,097 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:07:59,104 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:07:59,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 266 treesize of output 250 [2023-08-24 03:07:59,125 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-24 03:07:59,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 223 [2023-08-24 03:07:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:07:59,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138524773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:07:59,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:07:59,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-24 03:07:59,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111991526] [2023-08-24 03:07:59,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:07:59,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 03:07:59,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:07:59,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 03:07:59,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1328, Unknown=8, NotChecked=0, Total=1560 [2023-08-24 03:07:59,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:07:59,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 547 transitions, 10152 flow. Second operand has 40 states, 40 states have (on average 85.625) internal successors, (3425), 40 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:07:59,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:07:59,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:07:59,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:08:02,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:08:07,328 WARN L539 Checker$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 03:08:09,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:08:19,960 INFO L124 PetriNetUnfolderBase]: 2227/3853 cut-off events. [2023-08-24 03:08:19,960 INFO L125 PetriNetUnfolderBase]: For 71464/71464 co-relation queries the response was YES. [2023-08-24 03:08:19,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32278 conditions, 3853 events. 2227/3853 cut-off events. For 71464/71464 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23615 event pairs, 272 based on Foata normal form. 5/3858 useless extension candidates. Maximal degree in co-relation 32167. Up to 757 conditions per place. [2023-08-24 03:08:19,994 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 504 selfloop transitions, 350 changer transitions 43/897 dead transitions. [2023-08-24 03:08:19,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 897 transitions, 16151 flow [2023-08-24 03:08:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-24 03:08:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-24 03:08:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4792 transitions. [2023-08-24 03:08:19,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31836300823810787 [2023-08-24 03:08:19,999 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4792 transitions. [2023-08-24 03:08:19,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4792 transitions. [2023-08-24 03:08:20,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:08:20,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4792 transitions. [2023-08-24 03:08:20,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 90.41509433962264) internal successors, (4792), 53 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:20,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 284.0) internal successors, (15336), 54 states have internal predecessors, (15336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:20,042 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 284.0) internal successors, (15336), 54 states have internal predecessors, (15336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:20,042 INFO L175 Difference]: Start difference. First operand has 354 places, 547 transitions, 10152 flow. Second operand 53 states and 4792 transitions. [2023-08-24 03:08:20,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 897 transitions, 16151 flow [2023-08-24 03:08:20,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 897 transitions, 14748 flow, removed 209 selfloop flow, removed 34 redundant places. [2023-08-24 03:08:20,410 INFO L231 Difference]: Finished difference. Result has 375 places, 627 transitions, 11459 flow [2023-08-24 03:08:20,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=9134, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=11459, PETRI_PLACES=375, PETRI_TRANSITIONS=627} [2023-08-24 03:08:20,410 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 346 predicate places. [2023-08-24 03:08:20,410 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 627 transitions, 11459 flow [2023-08-24 03:08:20,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.625) internal successors, (3425), 40 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:20,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:08:20,411 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] [2023-08-24 03:08:20,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 03:08:20,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:08:20,615 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 03:08:20,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:08:20,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1442339838, now seen corresponding path program 7 times [2023-08-24 03:08:20,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:08:20,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987247753] [2023-08-24 03:08:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:08:20,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:08:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:08:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:21,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:08:21,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987247753] [2023-08-24 03:08:21,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987247753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:08:21,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727586142] [2023-08-24 03:08:21,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:08:21,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:08:21,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:08:21,501 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 03:08:21,529 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 03:08:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:08:21,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 03:08:21,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:08:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:21,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:08:22,206 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:08:22,206 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 60 treesize of output 62 [2023-08-24 03:08:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:22,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727586142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:08:22,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:08:22,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-24 03:08:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494800722] [2023-08-24 03:08:22,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:08:22,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 03:08:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:08:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 03:08:22,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 03:08:22,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 03:08:22,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 627 transitions, 11459 flow. Second operand has 36 states, 36 states have (on average 95.91666666666667) internal successors, (3453), 36 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:22,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:08:22,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 03:08:22,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:08:27,496 INFO L124 PetriNetUnfolderBase]: 2626/4457 cut-off events. [2023-08-24 03:08:27,497 INFO L125 PetriNetUnfolderBase]: For 81729/81729 co-relation queries the response was YES. [2023-08-24 03:08:27,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36647 conditions, 4457 events. 2626/4457 cut-off events. For 81729/81729 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27242 event pairs, 280 based on Foata normal form. 4/4461 useless extension candidates. Maximal degree in co-relation 36530. Up to 891 conditions per place. [2023-08-24 03:08:27,545 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 407 selfloop transitions, 488 changer transitions 41/936 dead transitions. [2023-08-24 03:08:27,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 936 transitions, 17228 flow [2023-08-24 03:08:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 03:08:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 03:08:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3752 transitions. [2023-08-24 03:08:27,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570612866387514 [2023-08-24 03:08:27,548 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3752 transitions. [2023-08-24 03:08:27,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3752 transitions. [2023-08-24 03:08:27,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:08:27,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3752 transitions. [2023-08-24 03:08:27,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 101.4054054054054) internal successors, (3752), 37 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:27,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 284.0) internal successors, (10792), 38 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:27,565 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 284.0) internal successors, (10792), 38 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:27,565 INFO L175 Difference]: Start difference. First operand has 375 places, 627 transitions, 11459 flow. Second operand 37 states and 3752 transitions. [2023-08-24 03:08:27,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 936 transitions, 17228 flow [2023-08-24 03:08:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 936 transitions, 16257 flow, removed 305 selfloop flow, removed 24 redundant places. [2023-08-24 03:08:28,228 INFO L231 Difference]: Finished difference. Result has 392 places, 777 transitions, 14796 flow [2023-08-24 03:08:28,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=10724, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14796, PETRI_PLACES=392, PETRI_TRANSITIONS=777} [2023-08-24 03:08:28,229 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 363 predicate places. [2023-08-24 03:08:28,230 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 777 transitions, 14796 flow [2023-08-24 03:08:28,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 95.91666666666667) internal successors, (3453), 36 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:28,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:08:28,230 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] [2023-08-24 03:08:28,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-24 03:08:28,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 03:08:28,435 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 03:08:28,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:08:28,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1246022700, now seen corresponding path program 8 times [2023-08-24 03:08:28,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:08:28,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847267744] [2023-08-24 03:08:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:08:28,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:08:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:08:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:29,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:08:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847267744] [2023-08-24 03:08:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847267744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:08:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660545116] [2023-08-24 03:08:29,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:08:29,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:08:29,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:08:29,389 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 03:08:29,391 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 03:08:29,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:08:29,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:08:29,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 03:08:29,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:08:29,629 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 03:08:29,672 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 03:08:29,707 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 03:08:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:08:29,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-08-24 03:08:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:30,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:08:31,029 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:08:31,030 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 130 treesize of output 94 [2023-08-24 03:08:31,070 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:08:31,070 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 1092 treesize of output 1043 [2023-08-24 03:08:31,099 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:08:31,099 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 212 treesize of output 196 [2023-08-24 03:08:31,127 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:08:31,127 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 160 treesize of output 170 [2023-08-24 03:08:31,861 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:08:31,861 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 110 treesize of output 58 [2023-08-24 03:08:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:31,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660545116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:08:31,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:08:31,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 03:08:31,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440989276] [2023-08-24 03:08:31,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:08:31,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 03:08:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:08:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 03:08:31,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1414, Unknown=6, NotChecked=0, Total=1640 [2023-08-24 03:08:31,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:08:31,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 777 transitions, 14796 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:31,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:08:31,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:08:31,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:08:38,205 INFO L124 PetriNetUnfolderBase]: 2653/4559 cut-off events. [2023-08-24 03:08:38,205 INFO L125 PetriNetUnfolderBase]: For 92442/92442 co-relation queries the response was YES. [2023-08-24 03:08:38,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37922 conditions, 4559 events. 2653/4559 cut-off events. For 92442/92442 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28432 event pairs, 385 based on Foata normal form. 5/4564 useless extension candidates. Maximal degree in co-relation 37801. Up to 1758 conditions per place. [2023-08-24 03:08:38,257 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 625 selfloop transitions, 347 changer transitions 56/1028 dead transitions. [2023-08-24 03:08:38,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1028 transitions, 20034 flow [2023-08-24 03:08:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 03:08:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 03:08:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3952 transitions. [2023-08-24 03:08:38,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31626120358514725 [2023-08-24 03:08:38,261 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3952 transitions. [2023-08-24 03:08:38,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3952 transitions. [2023-08-24 03:08:38,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:08:38,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3952 transitions. [2023-08-24 03:08:38,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 89.81818181818181) internal successors, (3952), 44 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:38,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 284.0) internal successors, (12780), 45 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:38,270 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 284.0) internal successors, (12780), 45 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:38,270 INFO L175 Difference]: Start difference. First operand has 392 places, 777 transitions, 14796 flow. Second operand 44 states and 3952 transitions. [2023-08-24 03:08:38,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1028 transitions, 20034 flow [2023-08-24 03:08:38,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1028 transitions, 19318 flow, removed 282 selfloop flow, removed 11 redundant places. [2023-08-24 03:08:38,923 INFO L231 Difference]: Finished difference. Result has 432 places, 814 transitions, 15788 flow [2023-08-24 03:08:38,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=14281, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=15788, PETRI_PLACES=432, PETRI_TRANSITIONS=814} [2023-08-24 03:08:38,924 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 403 predicate places. [2023-08-24 03:08:38,924 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 814 transitions, 15788 flow [2023-08-24 03:08:38,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:38,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:08:38,924 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] [2023-08-24 03:08:38,935 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 03:08:39,129 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,SelfDestructingSolverStorable37 [2023-08-24 03:08:39,129 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 03:08:39,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:08:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash 565757588, now seen corresponding path program 9 times [2023-08-24 03:08:39,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:08:39,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006217778] [2023-08-24 03:08:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:08:39,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:08:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:08:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:40,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:08:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006217778] [2023-08-24 03:08:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006217778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:08:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744139776] [2023-08-24 03:08:40,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:08:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:08:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:08:40,177 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 03:08:40,179 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 03:08:40,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:08:40,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:08:40,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 03:08:40,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:08:40,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:08:40,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-24 03:08:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:40,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:08:43,103 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:08:43,103 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 116 treesize of output 118 [2023-08-24 03:08:43,121 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:08:43,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 60 [2023-08-24 03:08:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:43,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744139776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:08:43,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:08:43,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-08-24 03:08:43,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961398566] [2023-08-24 03:08:43,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:08:43,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 03:08:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:08:43,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 03:08:43,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1313, Unknown=1, NotChecked=0, Total=1482 [2023-08-24 03:08:43,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:08:43,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 814 transitions, 15788 flow. Second operand has 39 states, 39 states have (on average 85.76923076923077) internal successors, (3345), 39 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:43,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:08:43,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:08:43,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:08:53,182 WARN L234 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 119 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:08:56,423 INFO L124 PetriNetUnfolderBase]: 2656/4563 cut-off events. [2023-08-24 03:08:56,423 INFO L125 PetriNetUnfolderBase]: For 95933/95933 co-relation queries the response was YES. [2023-08-24 03:08:56,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38029 conditions, 4563 events. 2656/4563 cut-off events. For 95933/95933 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28240 event pairs, 415 based on Foata normal form. 3/4566 useless extension candidates. Maximal degree in co-relation 37899. Up to 1080 conditions per place. [2023-08-24 03:08:56,474 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 530 selfloop transitions, 441 changer transitions 48/1019 dead transitions. [2023-08-24 03:08:56,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1019 transitions, 19351 flow [2023-08-24 03:08:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 03:08:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 03:08:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3816 transitions. [2023-08-24 03:08:56,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3199195171026157 [2023-08-24 03:08:56,478 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3816 transitions. [2023-08-24 03:08:56,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3816 transitions. [2023-08-24 03:08:56,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:08:56,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3816 transitions. [2023-08-24 03:08:56,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 90.85714285714286) internal successors, (3816), 42 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:56,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 284.0) internal successors, (12212), 43 states have internal predecessors, (12212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:56,486 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 284.0) internal successors, (12212), 43 states have internal predecessors, (12212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:56,486 INFO L175 Difference]: Start difference. First operand has 432 places, 814 transitions, 15788 flow. Second operand 42 states and 3816 transitions. [2023-08-24 03:08:56,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1019 transitions, 19351 flow [2023-08-24 03:08:57,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1019 transitions, 18983 flow, removed 67 selfloop flow, removed 27 redundant places. [2023-08-24 03:08:57,217 INFO L231 Difference]: Finished difference. Result has 455 places, 832 transitions, 17058 flow [2023-08-24 03:08:57,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=15445, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=17058, PETRI_PLACES=455, PETRI_TRANSITIONS=832} [2023-08-24 03:08:57,221 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 426 predicate places. [2023-08-24 03:08:57,221 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 832 transitions, 17058 flow [2023-08-24 03:08:57,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 85.76923076923077) internal successors, (3345), 39 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:08:57,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:08:57,221 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] [2023-08-24 03:08:57,229 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 03:08:57,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 03:08:57,426 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 03:08:57,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:08:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1764700758, now seen corresponding path program 10 times [2023-08-24 03:08:57,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:08:57,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997105637] [2023-08-24 03:08:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:08:57,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:08:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:08:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:58,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:08:58,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997105637] [2023-08-24 03:08:58,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997105637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:08:58,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473569794] [2023-08-24 03:08:58,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:08:58,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:08:58,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:08:58,316 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 03:08:58,317 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 03:08:58,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:08:58,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:08:58,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 03:08:58,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:08:58,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 03:08:58,576 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 03:08:58,613 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 03:08:58,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:08:58,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-08-24 03:08:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:08:58,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:08:59,497 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse19 (* c_~end~0 4))) (let ((.cse20 (* c_~start~0 4)) (.cse17 (mod (select (select |c_#memory_int| c_~queue~0.base) (+ .cse19 c_~queue~0.offset)) 4294967296)) (.cse0 (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296))) (let ((.cse4 (+ .cse17 .cse0)) (.cse3 (mod |c_thread2Thread1of1ForFork2_~x~1#1| 4294967296)) (.cse6 (+ .cse20 c_~queue~0.offset)) (.cse7 (+ .cse20 c_~queue~0.offset 4)) (.cse8 (+ .cse19 c_~queue~0.offset 4))) (and (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse1 (mod (select .cse5 .cse8) 4294967296))) (or (forall ((v_y_338 Int)) (let ((.cse2 (* v_y_338 4294967296))) (or (<= .cse0 (+ .cse1 .cse2)) (not (= (+ .cse1 .cse3 .cse2) .cse4))))) (= (mod (select .cse5 .cse6) 4294967296) (mod (select .cse5 .cse7) 4294967296)) (<= .cse0 .cse1))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse10 (mod (select .cse9 .cse8) 4294967296))) (or (= (mod (select .cse9 .cse6) 4294967296) (mod (select .cse9 .cse7) 4294967296)) (forall ((v_y_338 Int)) (let ((.cse11 (* v_y_338 4294967296))) (or (not (= .cse4 (+ .cse10 .cse3 .cse11 4294967296))) (< (+ .cse10 .cse11 4294967296) .cse0)))) (<= .cse0 .cse10))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse13 (mod (select .cse12 .cse8) 4294967296))) (or (= (mod (select .cse12 .cse6) 4294967296) (mod (select .cse12 .cse7) 4294967296)) (< .cse13 .cse0) (forall ((v_y_338 Int)) (let ((.cse14 (* v_y_338 4294967296))) (or (< (+ .cse13 .cse14) .cse0) (not (= (+ .cse13 .cse3 .cse14) .cse4))))))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse18 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse15 (mod (select .cse18 .cse8) 4294967296))) (or (forall ((v_y_338 Int)) (let ((.cse16 (* v_y_338 4294967296))) (or (<= (+ .cse0 4294967296) (+ .cse15 .cse16)) (not (= (+ .cse15 .cse3 .cse16) (+ .cse17 .cse0 4294967296)))))) (= (mod (select .cse18 .cse6) 4294967296) (mod (select .cse18 .cse7) 4294967296)) (< .cse15 .cse0))))))))) (<= c_~n~0 (+ c_~start~0 1)) (< c_~start~0 0)) is different from false [2023-08-24 03:08:59,589 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse10 (* c_~start~0 4)) (.cse9 (* c_~end~0 4)) (.cse5 (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296))) (let ((.cse4 (+ (mod (select (select |c_#memory_int| c_~queue~0.base) (+ .cse9 c_~queue~0.offset)) 4294967296) .cse5)) (.cse1 (+ .cse10 c_~queue~0.offset)) (.cse2 (+ .cse10 c_~queue~0.offset 4)) (.cse6 (+ .cse9 c_~queue~0.offset 4))) (and (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse3 (mod (select .cse0 .cse6) 4294967296))) (or (= (mod (select .cse0 .cse1) 4294967296) (mod (select .cse0 .cse2) 4294967296)) (forall ((v_y_338 Int)) (not (= (+ .cse3 (* v_y_338 4294967296) 4294967296) .cse4))) (<= .cse5 .cse3))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse7 (mod (select .cse8 .cse6) 4294967296))) (or (forall ((v_y_338 Int)) (not (= (+ .cse7 (* v_y_338 4294967296)) .cse4))) (= (mod (select .cse8 .cse1) 4294967296) (mod (select .cse8 .cse2) 4294967296)) (< .cse7 .cse5)))))))) (<= c_~n~0 (+ c_~start~0 1)) (< c_~start~0 0)) is different from false [2023-08-24 03:08:59,924 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:08:59,924 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 135 treesize of output 99 [2023-08-24 03:09:00,023 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:09:00,023 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 2756 treesize of output 2558 [2023-08-24 03:09:00,084 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:09:00,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 406 [2023-08-24 03:09:00,145 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:09:00,145 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 388 treesize of output 360 [2023-08-24 03:09:00,227 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:09:00,228 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 261 treesize of output 265 [2023-08-24 03:09:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 03:09:19,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473569794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:09:19,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:09:19,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 03:09:19,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036230928] [2023-08-24 03:09:19,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:09:19,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 03:09:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:09:19,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 03:09:19,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1343, Unknown=7, NotChecked=150, Total=1640 [2023-08-24 03:09:19,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:09:19,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 832 transitions, 17058 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:19,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:09:19,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:09:19,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:09:23,514 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse22 (* c_~end~0 4)) (.cse23 (* c_~start~0 4))) (let ((.cse5 (+ .cse23 c_~queue~0.offset)) (.cse6 (+ .cse23 c_~queue~0.offset 4)) (.cse3 (+ .cse22 c_~queue~0.offset 4)) (.cse4 (mod (select (select |c_#memory_int| c_~queue~0.base) (+ .cse22 c_~queue~0.offset)) 4294967296)) (.cse0 (<= c_~n~0 (+ c_~start~0 1))) (.cse1 (< c_~start~0 0))) (and (or (< (+ |c_ULTIMATE.start_create_fresh_uint_array_~i~2#1| 2) |c_ULTIMATE.start_create_fresh_uint_array_~size#1|) (and (= c_~start~0 c_~end~0) (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|))) .cse0 .cse1) (or .cse0 .cse1 (forall ((v_y_338 Int) (v_ArrVal_1807 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (or (not (= (+ (mod (select .cse2 .cse3) 4294967296) (* v_y_338 4294967296)) .cse4)) (= (mod (select .cse2 .cse5) 4294967296) (mod (select .cse2 .cse6) 4294967296)))))) (or (let ((.cse7 (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296))) (let ((.cse11 (+ .cse4 .cse7)) (.cse10 (mod |c_thread2Thread1of1ForFork2_~x~1#1| 4294967296))) (and (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse8 (mod (select .cse12 .cse3) 4294967296))) (or (forall ((v_y_338 Int)) (let ((.cse9 (* v_y_338 4294967296))) (or (<= .cse7 (+ .cse8 .cse9)) (not (= (+ .cse8 .cse10 .cse9) .cse11))))) (= (mod (select .cse12 .cse5) 4294967296) (mod (select .cse12 .cse6) 4294967296)) (<= .cse7 .cse8))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse14 (mod (select .cse13 .cse3) 4294967296))) (or (= (mod (select .cse13 .cse5) 4294967296) (mod (select .cse13 .cse6) 4294967296)) (forall ((v_y_338 Int)) (let ((.cse15 (* v_y_338 4294967296))) (or (not (= .cse11 (+ .cse14 .cse10 .cse15 4294967296))) (< (+ .cse14 .cse15 4294967296) .cse7)))) (<= .cse7 .cse14))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse16 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse17 (mod (select .cse16 .cse3) 4294967296))) (or (= (mod (select .cse16 .cse5) 4294967296) (mod (select .cse16 .cse6) 4294967296)) (< .cse17 .cse7) (forall ((v_y_338 Int)) (let ((.cse18 (* v_y_338 4294967296))) (or (< (+ .cse17 .cse18) .cse7) (not (= (+ .cse17 .cse10 .cse18) .cse11))))))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse21 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse19 (mod (select .cse21 .cse3) 4294967296))) (or (forall ((v_y_338 Int)) (let ((.cse20 (* v_y_338 4294967296))) (or (<= (+ .cse7 4294967296) (+ .cse19 .cse20)) (not (= (+ .cse19 .cse10 .cse20) (+ .cse4 .cse7 4294967296)))))) (= (mod (select .cse21 .cse5) 4294967296) (mod (select .cse21 .cse6) 4294967296)) (< .cse19 .cse7)))))))) .cse0 .cse1)))) is different from false [2023-08-24 03:09:24,644 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse22 (* c_~end~0 4)) (.cse23 (* c_~start~0 4))) (let ((.cse5 (+ .cse23 c_~queue~0.offset)) (.cse6 (+ .cse23 c_~queue~0.offset 4)) (.cse3 (+ .cse22 c_~queue~0.offset 4)) (.cse4 (mod (select (select |c_#memory_int| c_~queue~0.base) (+ .cse22 c_~queue~0.offset)) 4294967296)) (.cse0 (<= c_~n~0 (+ c_~start~0 1))) (.cse1 (< c_~start~0 0))) (and (or .cse0 .cse1 (forall ((v_y_338 Int) (v_ArrVal_1807 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (or (not (= (+ (mod (select .cse2 .cse3) 4294967296) (* v_y_338 4294967296)) .cse4)) (= (mod (select .cse2 .cse5) 4294967296) (mod (select .cse2 .cse6) 4294967296)))))) (or (let ((.cse7 (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296))) (let ((.cse11 (+ .cse4 .cse7)) (.cse10 (mod |c_thread2Thread1of1ForFork2_~x~1#1| 4294967296))) (and (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse8 (mod (select .cse12 .cse3) 4294967296))) (or (forall ((v_y_338 Int)) (let ((.cse9 (* v_y_338 4294967296))) (or (<= .cse7 (+ .cse8 .cse9)) (not (= (+ .cse8 .cse10 .cse9) .cse11))))) (= (mod (select .cse12 .cse5) 4294967296) (mod (select .cse12 .cse6) 4294967296)) (<= .cse7 .cse8))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse14 (mod (select .cse13 .cse3) 4294967296))) (or (= (mod (select .cse13 .cse5) 4294967296) (mod (select .cse13 .cse6) 4294967296)) (forall ((v_y_338 Int)) (let ((.cse15 (* v_y_338 4294967296))) (or (not (= .cse11 (+ .cse14 .cse10 .cse15 4294967296))) (< (+ .cse14 .cse15 4294967296) .cse7)))) (<= .cse7 .cse14))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse16 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse17 (mod (select .cse16 .cse3) 4294967296))) (or (= (mod (select .cse16 .cse5) 4294967296) (mod (select .cse16 .cse6) 4294967296)) (< .cse17 .cse7) (forall ((v_y_338 Int)) (let ((.cse18 (* v_y_338 4294967296))) (or (< (+ .cse17 .cse18) .cse7) (not (= (+ .cse17 .cse10 .cse18) .cse11))))))))) (forall ((v_ArrVal_1807 (Array Int Int))) (let ((.cse21 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1807) c_~queue~0.base))) (let ((.cse19 (mod (select .cse21 .cse3) 4294967296))) (or (forall ((v_y_338 Int)) (let ((.cse20 (* v_y_338 4294967296))) (or (<= (+ .cse7 4294967296) (+ .cse19 .cse20)) (not (= (+ .cse19 .cse10 .cse20) (+ .cse4 .cse7 4294967296)))))) (= (mod (select .cse21 .cse5) 4294967296) (mod (select .cse21 .cse6) 4294967296)) (< .cse19 .cse7)))))))) .cse0 .cse1)))) is different from false [2023-08-24 03:09:28,856 INFO L124 PetriNetUnfolderBase]: 2907/4897 cut-off events. [2023-08-24 03:09:28,857 INFO L125 PetriNetUnfolderBase]: For 120774/120774 co-relation queries the response was YES. [2023-08-24 03:09:28,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43142 conditions, 4897 events. 2907/4897 cut-off events. For 120774/120774 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29974 event pairs, 441 based on Foata normal form. 3/4900 useless extension candidates. Maximal degree in co-relation 43002. Up to 2187 conditions per place. [2023-08-24 03:09:28,900 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 786 selfloop transitions, 331 changer transitions 31/1148 dead transitions. [2023-08-24 03:09:28,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1148 transitions, 24459 flow [2023-08-24 03:09:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 03:09:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 03:09:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3589 transitions. [2023-08-24 03:09:28,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3159330985915493 [2023-08-24 03:09:28,988 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3589 transitions. [2023-08-24 03:09:28,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3589 transitions. [2023-08-24 03:09:28,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:09:28,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3589 transitions. [2023-08-24 03:09:28,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 89.725) internal successors, (3589), 40 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:28,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 284.0) internal successors, (11644), 41 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:28,995 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 284.0) internal successors, (11644), 41 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:28,995 INFO L175 Difference]: Start difference. First operand has 455 places, 832 transitions, 17058 flow. Second operand 40 states and 3589 transitions. [2023-08-24 03:09:28,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1148 transitions, 24459 flow [2023-08-24 03:09:29,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1148 transitions, 24128 flow, removed 55 selfloop flow, removed 25 redundant places. [2023-08-24 03:09:29,704 INFO L231 Difference]: Finished difference. Result has 481 places, 940 transitions, 20637 flow [2023-08-24 03:09:29,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=16775, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20637, PETRI_PLACES=481, PETRI_TRANSITIONS=940} [2023-08-24 03:09:29,705 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 452 predicate places. [2023-08-24 03:09:29,705 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 940 transitions, 20637 flow [2023-08-24 03:09:29,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:29,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:09:29,706 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] [2023-08-24 03:09:29,711 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 03:09:29,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 03:09:29,910 INFO L420 AbstractCegarLoop]: === Iteration 41 === 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 03:09:29,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:09:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2040239090, now seen corresponding path program 11 times [2023-08-24 03:09:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:09:29,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494443284] [2023-08-24 03:09:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:09:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:09:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:09:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:09:31,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:09:31,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494443284] [2023-08-24 03:09:31,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494443284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:09:31,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522101869] [2023-08-24 03:09:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:09:31,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:09:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:09:31,044 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 03:09:31,046 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 03:09:31,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:09:31,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:09:31,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 03:09:31,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:09:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:09:31,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:09:31,542 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:09:31,542 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 58 treesize of output 60 [2023-08-24 03:09:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:09:31,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522101869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:09:31,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:09:31,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 28 [2023-08-24 03:09:31,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786038205] [2023-08-24 03:09:31,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:09:31,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 03:09:31,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:09:31,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 03:09:31,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2023-08-24 03:09:31,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:09:31,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 940 transitions, 20637 flow. Second operand has 30 states, 30 states have (on average 86.06666666666666) internal successors, (2582), 30 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:31,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:09:31,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:09:31,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:09:37,218 INFO L124 PetriNetUnfolderBase]: 3808/6193 cut-off events. [2023-08-24 03:09:37,218 INFO L125 PetriNetUnfolderBase]: For 161812/161812 co-relation queries the response was YES. [2023-08-24 03:09:37,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58147 conditions, 6193 events. 3808/6193 cut-off events. For 161812/161812 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37838 event pairs, 291 based on Foata normal form. 5/6198 useless extension candidates. Maximal degree in co-relation 57997. Up to 1267 conditions per place. [2023-08-24 03:09:37,296 INFO L140 encePairwiseOnDemand]: 272/284 looper letters, 581 selfloop transitions, 772 changer transitions 44/1397 dead transitions. [2023-08-24 03:09:37,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 1397 transitions, 31468 flow [2023-08-24 03:09:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 03:09:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 03:09:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3470 transitions. [2023-08-24 03:09:37,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3215344699777613 [2023-08-24 03:09:37,300 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3470 transitions. [2023-08-24 03:09:37,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3470 transitions. [2023-08-24 03:09:37,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:09:37,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3470 transitions. [2023-08-24 03:09:37,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 91.3157894736842) internal successors, (3470), 38 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:37,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 284.0) internal successors, (11076), 39 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:37,313 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 284.0) internal successors, (11076), 39 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:37,313 INFO L175 Difference]: Start difference. First operand has 481 places, 940 transitions, 20637 flow. Second operand 38 states and 3470 transitions. [2023-08-24 03:09:37,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 1397 transitions, 31468 flow [2023-08-24 03:09:38,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 1397 transitions, 31098 flow, removed 39 selfloop flow, removed 20 redundant places. [2023-08-24 03:09:38,760 INFO L231 Difference]: Finished difference. Result has 517 places, 1191 transitions, 29132 flow [2023-08-24 03:09:38,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=20365, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=29132, PETRI_PLACES=517, PETRI_TRANSITIONS=1191} [2023-08-24 03:09:38,762 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 488 predicate places. [2023-08-24 03:09:38,762 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 1191 transitions, 29132 flow [2023-08-24 03:09:38,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.06666666666666) internal successors, (2582), 30 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:38,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:09:38,762 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] [2023-08-24 03:09:38,768 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 03:09:38,967 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,SelfDestructingSolverStorable40 [2023-08-24 03:09:38,967 INFO L420 AbstractCegarLoop]: === Iteration 42 === 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 03:09:38,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:09:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1388633142, now seen corresponding path program 12 times [2023-08-24 03:09:38,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:09:38,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203483461] [2023-08-24 03:09:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:09:38,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:09:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:09:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:09:40,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:09:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203483461] [2023-08-24 03:09:40,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203483461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:09:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802249139] [2023-08-24 03:09:40,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:09:40,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:09:40,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:09:40,485 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 03:09:40,487 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 03:09:40,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:09:40,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:09:40,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 03:09:40,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:09:40,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 03:09:40,786 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 03:09:40,820 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 03:09:40,852 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 03:09:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:09:41,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:09:42,572 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:09:42,572 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 204 treesize of output 144 [2023-08-24 03:09:42,614 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-24 03:09:42,614 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 2748 treesize of output 2567 [2023-08-24 03:09:42,635 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:09:42,637 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:09:42,652 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:09:42,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 419 treesize of output 400 [2023-08-24 03:09:42,682 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 03:09:42,683 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 582 treesize of output 446 [2023-08-24 03:09:42,728 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-24 03:09:42,729 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 327 treesize of output 269 [2023-08-24 03:09:43,629 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 03:09:43,629 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 203 treesize of output 1 [2023-08-24 03:09:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:09:43,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802249139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:09:43,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:09:43,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-24 03:09:43,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492403509] [2023-08-24 03:09:43,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:09:43,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 03:09:43,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:09:43,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 03:09:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1344, Unknown=11, NotChecked=0, Total=1560 [2023-08-24 03:09:43,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:09:43,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 1191 transitions, 29132 flow. Second operand has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:09:43,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:09:43,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:09:43,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:09:56,550 WARN L234 SmtUtils]: Spent 12.52s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:09:59,014 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 03:10:01,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:10:03,053 WARN L539 Checker$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 03:10:13,771 WARN L234 SmtUtils]: Spent 10.48s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:10:16,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:10:19,522 WARN L539 Checker$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 03:10:24,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:10:26,811 WARN L539 Checker$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 03:10:53,799 WARN L234 SmtUtils]: Spent 12.40s on a formula simplification that was a NOOP. DAG size: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:11:14,002 INFO L124 PetriNetUnfolderBase]: 4187/6803 cut-off events. [2023-08-24 03:11:14,002 INFO L125 PetriNetUnfolderBase]: For 213902/213902 co-relation queries the response was YES. [2023-08-24 03:11:14,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69650 conditions, 6803 events. 4187/6803 cut-off events. For 213902/213902 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 42325 event pairs, 510 based on Foata normal form. 3/6806 useless extension candidates. Maximal degree in co-relation 69478. Up to 1562 conditions per place. [2023-08-24 03:11:14,076 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 854 selfloop transitions, 732 changer transitions 28/1614 dead transitions. [2023-08-24 03:11:14,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 1614 transitions, 38674 flow [2023-08-24 03:11:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 03:11:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 03:11:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4016 transitions. [2023-08-24 03:11:14,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3213828425096031 [2023-08-24 03:11:14,079 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4016 transitions. [2023-08-24 03:11:14,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4016 transitions. [2023-08-24 03:11:14,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:11:14,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4016 transitions. [2023-08-24 03:11:14,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 91.27272727272727) internal successors, (4016), 44 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:14,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 284.0) internal successors, (12780), 45 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:14,087 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 284.0) internal successors, (12780), 45 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:14,087 INFO L175 Difference]: Start difference. First operand has 517 places, 1191 transitions, 29132 flow. Second operand 44 states and 4016 transitions. [2023-08-24 03:11:14,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 1614 transitions, 38674 flow [2023-08-24 03:11:16,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1614 transitions, 36569 flow, removed 404 selfloop flow, removed 17 redundant places. [2023-08-24 03:11:16,053 INFO L231 Difference]: Finished difference. Result has 561 places, 1309 transitions, 32696 flow [2023-08-24 03:11:16,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=27620, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=32696, PETRI_PLACES=561, PETRI_TRANSITIONS=1309} [2023-08-24 03:11:16,053 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 532 predicate places. [2023-08-24 03:11:16,054 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 1309 transitions, 32696 flow [2023-08-24 03:11:16,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:16,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:11:16,054 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] [2023-08-24 03:11:16,061 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 03:11:16,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:11:16,259 INFO L420 AbstractCegarLoop]: === Iteration 43 === 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 03:11:16,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:11:16,259 INFO L85 PathProgramCache]: Analyzing trace with hash 490510412, now seen corresponding path program 13 times [2023-08-24 03:11:16,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:11:16,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657729623] [2023-08-24 03:11:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:11:16,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:11:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:11:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:11:17,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:11:17,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657729623] [2023-08-24 03:11:17,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657729623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:11:17,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258890204] [2023-08-24 03:11:17,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:11:17,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:11:17,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:11:17,229 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 03:11:17,231 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 03:11:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:11:17,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 03:11:17,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:11:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:11:17,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:11:17,677 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:11:17,677 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 58 treesize of output 60 [2023-08-24 03:11:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 03:11:18,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258890204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:11:18,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:11:18,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-08-24 03:11:18,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645445483] [2023-08-24 03:11:18,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:11:18,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 03:11:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:11:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 03:11:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2023-08-24 03:11:18,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 03:11:18,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 1309 transitions, 32696 flow. Second operand has 28 states, 28 states have (on average 96.21428571428571) internal successors, (2694), 28 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:18,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:11:18,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 03:11:18,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:11:23,143 INFO L124 PetriNetUnfolderBase]: 4563/7370 cut-off events. [2023-08-24 03:11:23,143 INFO L125 PetriNetUnfolderBase]: For 251420/251420 co-relation queries the response was YES. [2023-08-24 03:11:23,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77001 conditions, 7370 events. 4563/7370 cut-off events. For 251420/251420 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 46048 event pairs, 599 based on Foata normal form. 4/7374 useless extension candidates. Maximal degree in co-relation 76811. Up to 1609 conditions per place. [2023-08-24 03:11:23,228 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 757 selfloop transitions, 805 changer transitions 28/1590 dead transitions. [2023-08-24 03:11:23,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1590 transitions, 40336 flow [2023-08-24 03:11:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 03:11:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 03:11:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3244 transitions. [2023-08-24 03:11:23,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569542253521127 [2023-08-24 03:11:23,237 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3244 transitions. [2023-08-24 03:11:23,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3244 transitions. [2023-08-24 03:11:23,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:11:23,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3244 transitions. [2023-08-24 03:11:23,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 101.375) internal successors, (3244), 32 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:23,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 284.0) internal successors, (9372), 33 states have internal predecessors, (9372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:23,243 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 284.0) internal successors, (9372), 33 states have internal predecessors, (9372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:23,243 INFO L175 Difference]: Start difference. First operand has 561 places, 1309 transitions, 32696 flow. Second operand 32 states and 3244 transitions. [2023-08-24 03:11:23,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1590 transitions, 40336 flow [2023-08-24 03:11:25,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 1590 transitions, 39557 flow, removed 238 selfloop flow, removed 13 redundant places. [2023-08-24 03:11:26,003 INFO L231 Difference]: Finished difference. Result has 594 places, 1443 transitions, 37516 flow [2023-08-24 03:11:26,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=32001, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=671, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=37516, PETRI_PLACES=594, PETRI_TRANSITIONS=1443} [2023-08-24 03:11:26,005 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 565 predicate places. [2023-08-24 03:11:26,005 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 1443 transitions, 37516 flow [2023-08-24 03:11:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 96.21428571428571) internal successors, (2694), 28 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:26,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:11:26,006 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] [2023-08-24 03:11:26,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-24 03:11:26,210 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,SelfDestructingSolverStorable42 [2023-08-24 03:11:26,210 INFO L420 AbstractCegarLoop]: === Iteration 44 === 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 03:11:26,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:11:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1019854112, now seen corresponding path program 14 times [2023-08-24 03:11:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:11:26,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470616578] [2023-08-24 03:11:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:11:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:11:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:11:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:11:28,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:11:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470616578] [2023-08-24 03:11:28,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470616578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:11:28,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229850840] [2023-08-24 03:11:28,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:11:28,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:11:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:11:28,608 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 03:11:28,609 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 03:11:28,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:11:28,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:11:28,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 03:11:28,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:11:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:11:29,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:11:29,235 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:11:29,236 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 60 treesize of output 62 [2023-08-24 03:11:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:11:30,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229850840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:11:30,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:11:30,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 28 [2023-08-24 03:11:30,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085155199] [2023-08-24 03:11:30,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:11:30,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 03:11:30,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:11:30,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 03:11:30,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2023-08-24 03:11:30,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:11:30,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 1443 transitions, 37516 flow. Second operand has 30 states, 30 states have (on average 86.0) internal successors, (2580), 30 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:30,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:11:30,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:11:30,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:11:41,720 INFO L124 PetriNetUnfolderBase]: 4737/7705 cut-off events. [2023-08-24 03:11:41,720 INFO L125 PetriNetUnfolderBase]: For 279710/279710 co-relation queries the response was YES. [2023-08-24 03:11:41,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82653 conditions, 7705 events. 4737/7705 cut-off events. For 279710/279710 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 48917 event pairs, 438 based on Foata normal form. 4/7709 useless extension candidates. Maximal degree in co-relation 82448. Up to 1609 conditions per place. [2023-08-24 03:11:41,966 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 694 selfloop transitions, 950 changer transitions 41/1685 dead transitions. [2023-08-24 03:11:41,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 1685 transitions, 43757 flow [2023-08-24 03:11:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 03:11:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 03:11:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3463 transitions. [2023-08-24 03:11:41,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3208858413639733 [2023-08-24 03:11:41,969 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3463 transitions. [2023-08-24 03:11:41,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3463 transitions. [2023-08-24 03:11:41,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:11:41,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3463 transitions. [2023-08-24 03:11:41,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 91.13157894736842) internal successors, (3463), 38 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:41,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 284.0) internal successors, (11076), 39 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:41,976 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 284.0) internal successors, (11076), 39 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:41,976 INFO L175 Difference]: Start difference. First operand has 594 places, 1443 transitions, 37516 flow. Second operand 38 states and 3463 transitions. [2023-08-24 03:11:41,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 1685 transitions, 43757 flow [2023-08-24 03:11:44,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 1685 transitions, 43412 flow, removed 29 selfloop flow, removed 9 redundant places. [2023-08-24 03:11:44,943 INFO L231 Difference]: Finished difference. Result has 635 places, 1513 transitions, 41444 flow [2023-08-24 03:11:44,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=37175, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=891, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=41444, PETRI_PLACES=635, PETRI_TRANSITIONS=1513} [2023-08-24 03:11:44,944 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 606 predicate places. [2023-08-24 03:11:44,944 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 1513 transitions, 41444 flow [2023-08-24 03:11:44,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.0) internal successors, (2580), 30 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:44,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:11:44,945 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] [2023-08-24 03:11:44,951 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 03:11:45,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:11:45,149 INFO L420 AbstractCegarLoop]: === Iteration 45 === 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 03:11:45,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:11:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1996499186, now seen corresponding path program 15 times [2023-08-24 03:11:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:11:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540629081] [2023-08-24 03:11:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:11:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:11:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:11:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:11:46,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:11:46,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540629081] [2023-08-24 03:11:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540629081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:11:46,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743797696] [2023-08-24 03:11:46,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:11:46,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:11:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:11:46,447 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 03:11:46,449 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 03:11:46,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:11:46,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:11:46,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 03:11:46,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:11:47,210 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:11:47,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 56 [2023-08-24 03:11:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:11:47,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:11:47,667 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:11:47,668 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 57 treesize of output 60 [2023-08-24 03:11:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:11:48,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743797696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:11:48,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:11:48,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 34 [2023-08-24 03:11:48,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694993885] [2023-08-24 03:11:48,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:11:48,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 03:11:48,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:11:48,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 03:11:48,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 03:11:48,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:11:48,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 1513 transitions, 41444 flow. Second operand has 36 states, 36 states have (on average 85.80555555555556) internal successors, (3089), 36 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:48,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:11:48,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:11:48,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:11:58,200 INFO L124 PetriNetUnfolderBase]: 4781/7861 cut-off events. [2023-08-24 03:11:58,201 INFO L125 PetriNetUnfolderBase]: For 322407/322407 co-relation queries the response was YES. [2023-08-24 03:11:58,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87368 conditions, 7861 events. 4781/7861 cut-off events. For 322407/322407 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 51061 event pairs, 739 based on Foata normal form. 4/7865 useless extension candidates. Maximal degree in co-relation 87150. Up to 4218 conditions per place. [2023-08-24 03:11:58,355 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 1313 selfloop transitions, 341 changer transitions 32/1686 dead transitions. [2023-08-24 03:11:58,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 1686 transitions, 46186 flow [2023-08-24 03:11:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 03:11:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 03:11:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3002 transitions. [2023-08-24 03:11:58,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32031583440034145 [2023-08-24 03:11:58,358 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3002 transitions. [2023-08-24 03:11:58,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3002 transitions. [2023-08-24 03:11:58,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:11:58,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3002 transitions. [2023-08-24 03:11:58,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 90.96969696969697) internal successors, (3002), 33 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:58,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 284.0) internal successors, (9656), 34 states have internal predecessors, (9656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:58,364 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 284.0) internal successors, (9656), 34 states have internal predecessors, (9656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:11:58,364 INFO L175 Difference]: Start difference. First operand has 635 places, 1513 transitions, 41444 flow. Second operand 33 states and 3002 transitions. [2023-08-24 03:11:58,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 1686 transitions, 46186 flow [2023-08-24 03:12:01,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 1686 transitions, 45050 flow, removed 156 selfloop flow, removed 18 redundant places. [2023-08-24 03:12:01,967 INFO L231 Difference]: Finished difference. Result has 653 places, 1531 transitions, 41446 flow [2023-08-24 03:12:01,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=40337, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=41446, PETRI_PLACES=653, PETRI_TRANSITIONS=1531} [2023-08-24 03:12:01,969 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 624 predicate places. [2023-08-24 03:12:01,969 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 1531 transitions, 41446 flow [2023-08-24 03:12:01,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 85.80555555555556) internal successors, (3089), 36 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:01,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:12:01,969 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] [2023-08-24 03:12:01,974 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 03:12:02,173 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,SelfDestructingSolverStorable44 [2023-08-24 03:12:02,174 INFO L420 AbstractCegarLoop]: === Iteration 46 === 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 03:12:02,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:12:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash -405696348, now seen corresponding path program 16 times [2023-08-24 03:12:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:12:02,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327762345] [2023-08-24 03:12:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:12:02,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:12:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:12:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:12:03,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:12:03,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327762345] [2023-08-24 03:12:03,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327762345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:12:03,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639196794] [2023-08-24 03:12:03,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:12:03,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:12:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:12:03,289 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 03:12:03,290 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 03:12:03,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:12:03,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:12:03,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 03:12:03,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:12:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:12:03,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:12:03,760 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:12:03,760 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 58 treesize of output 60 [2023-08-24 03:12:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:12:04,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639196794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:12:04,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:12:04,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-08-24 03:12:04,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211725641] [2023-08-24 03:12:04,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:12:04,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 03:12:04,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:12:04,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 03:12:04,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-08-24 03:12:04,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 03:12:04,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 1531 transitions, 41446 flow. Second operand has 29 states, 29 states have (on average 96.06896551724138) internal successors, (2786), 29 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:04,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:12:04,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 03:12:04,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:12:10,746 INFO L124 PetriNetUnfolderBase]: 4804/7910 cut-off events. [2023-08-24 03:12:10,746 INFO L125 PetriNetUnfolderBase]: For 311550/311550 co-relation queries the response was YES. [2023-08-24 03:12:10,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87844 conditions, 7910 events. 4804/7910 cut-off events. For 311550/311550 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 51584 event pairs, 439 based on Foata normal form. 4/7914 useless extension candidates. Maximal degree in co-relation 87621. Up to 1474 conditions per place. [2023-08-24 03:12:10,865 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 717 selfloop transitions, 987 changer transitions 28/1732 dead transitions. [2023-08-24 03:12:10,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 1732 transitions, 46932 flow [2023-08-24 03:12:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 03:12:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 03:12:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3653 transitions. [2023-08-24 03:12:10,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3572965571205008 [2023-08-24 03:12:10,868 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3653 transitions. [2023-08-24 03:12:10,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3653 transitions. [2023-08-24 03:12:10,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:12:10,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3653 transitions. [2023-08-24 03:12:10,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 101.47222222222223) internal successors, (3653), 36 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:10,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 284.0) internal successors, (10508), 37 states have internal predecessors, (10508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:10,875 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 284.0) internal successors, (10508), 37 states have internal predecessors, (10508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:10,875 INFO L175 Difference]: Start difference. First operand has 653 places, 1531 transitions, 41446 flow. Second operand 36 states and 3653 transitions. [2023-08-24 03:12:10,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 1732 transitions, 46932 flow [2023-08-24 03:12:14,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 1732 transitions, 46362 flow, removed 30 selfloop flow, removed 17 redundant places. [2023-08-24 03:12:14,732 INFO L231 Difference]: Finished difference. Result has 674 places, 1551 transitions, 43835 flow [2023-08-24 03:12:14,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=40892, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=967, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=43835, PETRI_PLACES=674, PETRI_TRANSITIONS=1551} [2023-08-24 03:12:14,733 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 645 predicate places. [2023-08-24 03:12:14,733 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 1551 transitions, 43835 flow [2023-08-24 03:12:14,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 96.06896551724138) internal successors, (2786), 29 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:14,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:12:14,734 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] [2023-08-24 03:12:14,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 03:12:14,938 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,SelfDestructingSolverStorable45 [2023-08-24 03:12:14,938 INFO L420 AbstractCegarLoop]: === Iteration 47 === 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 03:12:14,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:12:14,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2019263082, now seen corresponding path program 17 times [2023-08-24 03:12:14,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:12:14,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356656602] [2023-08-24 03:12:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:12:14,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:12:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:12:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:12:15,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:12:15,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356656602] [2023-08-24 03:12:15,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356656602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:12:15,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815171229] [2023-08-24 03:12:15,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:12:15,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:12:15,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:12:15,805 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:12:15,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 03:12:15,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:12:15,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:12:15,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 03:12:15,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:12:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:12:16,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:12:16,342 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:12:16,342 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 60 treesize of output 62 [2023-08-24 03:12:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:12:16,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815171229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:12:16,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:12:16,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-08-24 03:12:16,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972752404] [2023-08-24 03:12:16,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:12:16,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 03:12:16,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:12:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 03:12:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2023-08-24 03:12:16,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 03:12:16,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 1551 transitions, 43835 flow. Second operand has 29 states, 29 states have (on average 96.06896551724138) internal successors, (2786), 29 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:16,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:12:16,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 03:12:16,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:12:22,213 INFO L124 PetriNetUnfolderBase]: 4810/7935 cut-off events. [2023-08-24 03:12:22,213 INFO L125 PetriNetUnfolderBase]: For 345606/345606 co-relation queries the response was YES. [2023-08-24 03:12:22,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90616 conditions, 7935 events. 4810/7935 cut-off events. For 345606/345606 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 51985 event pairs, 426 based on Foata normal form. 3/7938 useless extension candidates. Maximal degree in co-relation 90391. Up to 1474 conditions per place. [2023-08-24 03:12:22,316 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 766 selfloop transitions, 917 changer transitions 27/1710 dead transitions. [2023-08-24 03:12:22,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 1710 transitions, 48775 flow [2023-08-24 03:12:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 03:12:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 03:12:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2842 transitions. [2023-08-24 03:12:22,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573943661971831 [2023-08-24 03:12:22,318 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2842 transitions. [2023-08-24 03:12:22,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2842 transitions. [2023-08-24 03:12:22,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:12:22,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2842 transitions. [2023-08-24 03:12:22,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 101.5) internal successors, (2842), 28 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:22,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 284.0) internal successors, (8236), 29 states have internal predecessors, (8236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:22,324 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 284.0) internal successors, (8236), 29 states have internal predecessors, (8236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:22,324 INFO L175 Difference]: Start difference. First operand has 674 places, 1551 transitions, 43835 flow. Second operand 28 states and 2842 transitions. [2023-08-24 03:12:22,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 1710 transitions, 48775 flow [2023-08-24 03:12:26,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 1710 transitions, 47730 flow, removed 29 selfloop flow, removed 21 redundant places. [2023-08-24 03:12:26,103 INFO L231 Difference]: Finished difference. Result has 683 places, 1565 transitions, 45225 flow [2023-08-24 03:12:26,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=42794, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=903, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=45225, PETRI_PLACES=683, PETRI_TRANSITIONS=1565} [2023-08-24 03:12:26,104 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 654 predicate places. [2023-08-24 03:12:26,104 INFO L495 AbstractCegarLoop]: Abstraction has has 683 places, 1565 transitions, 45225 flow [2023-08-24 03:12:26,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 96.06896551724138) internal successors, (2786), 29 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:12:26,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:12:26,104 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] [2023-08-24 03:12:26,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 03:12:26,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-24 03:12:26,309 INFO L420 AbstractCegarLoop]: === Iteration 48 === 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 03:12:26,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:12:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash 545544390, now seen corresponding path program 18 times [2023-08-24 03:12:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:12:26,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406399345] [2023-08-24 03:12:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:12:26,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:12:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:12:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:12:27,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:12:27,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406399345] [2023-08-24 03:12:27,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406399345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:12:27,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828144762] [2023-08-24 03:12:27,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:12:27,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:12:27,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:12:27,171 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:12:27,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 03:12:27,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:12:27,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:12:27,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 03:12:27,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:12:27,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:12:27,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:12:27,362 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 18 treesize of output 16 [2023-08-24 03:12:27,439 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 15 treesize of output 11 [2023-08-24 03:12:27,479 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 03:12:27,514 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 03:12:27,544 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 03:12:27,867 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-08-24 03:12:27,867 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 82 treesize of output 38 [2023-08-24 03:12:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:12:27,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:12:34,682 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:12:34,683 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 137 treesize of output 101 [2023-08-24 03:12:34,755 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:12:34,755 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 4140 treesize of output 3912 [2023-08-24 03:12:34,774 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:12:34,807 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:12:34,807 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 353 treesize of output 364 [2023-08-24 03:12:34,879 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:12:34,880 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 442 treesize of output 378 [2023-08-24 03:12:34,961 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:12:34,961 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 279 treesize of output 265 [2023-08-24 03:14:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:05,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828144762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:05,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:05,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-24 03:14:05,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472459697] [2023-08-24 03:14:05,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:05,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 03:14:05,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:05,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 03:14:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1352, Unknown=7, NotChecked=0, Total=1560 [2023-08-24 03:14:05,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:14:05,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 1565 transitions, 45225 flow. Second operand has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:05,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:05,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:14:05,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:19,228 INFO L124 PetriNetUnfolderBase]: 4916/8188 cut-off events. [2023-08-24 03:14:19,229 INFO L125 PetriNetUnfolderBase]: For 377008/377008 co-relation queries the response was YES. [2023-08-24 03:14:19,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95188 conditions, 8188 events. 4916/8188 cut-off events. For 377008/377008 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 54431 event pairs, 822 based on Foata normal form. 10/8198 useless extension candidates. Maximal degree in co-relation 94960. Up to 4291 conditions per place. [2023-08-24 03:14:19,344 INFO L140 encePairwiseOnDemand]: 272/284 looper letters, 1365 selfloop transitions, 279 changer transitions 39/1683 dead transitions. [2023-08-24 03:14:19,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 1683 transitions, 49956 flow [2023-08-24 03:14:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 03:14:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 03:14:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2011 transitions. [2023-08-24 03:14:19,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3218629961587708 [2023-08-24 03:14:19,346 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2011 transitions. [2023-08-24 03:14:19,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2011 transitions. [2023-08-24 03:14:19,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:19,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2011 transitions. [2023-08-24 03:14:19,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 91.4090909090909) internal successors, (2011), 22 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:19,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 284.0) internal successors, (6532), 23 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:19,350 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 284.0) internal successors, (6532), 23 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:19,350 INFO L175 Difference]: Start difference. First operand has 683 places, 1565 transitions, 45225 flow. Second operand 22 states and 2011 transitions. [2023-08-24 03:14:19,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 1683 transitions, 49956 flow [2023-08-24 03:14:23,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1683 transitions, 48821 flow, removed 56 selfloop flow, removed 23 redundant places. [2023-08-24 03:14:23,748 INFO L231 Difference]: Finished difference. Result has 683 places, 1578 transitions, 45186 flow [2023-08-24 03:14:23,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=44103, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=45186, PETRI_PLACES=683, PETRI_TRANSITIONS=1578} [2023-08-24 03:14:23,749 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 654 predicate places. [2023-08-24 03:14:23,749 INFO L495 AbstractCegarLoop]: Abstraction has has 683 places, 1578 transitions, 45186 flow [2023-08-24 03:14:23,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:23,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:23,750 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] [2023-08-24 03:14:23,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 03:14:23,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 03:14:23,955 INFO L420 AbstractCegarLoop]: === Iteration 49 === 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 03:14:23,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:23,955 INFO L85 PathProgramCache]: Analyzing trace with hash 87366356, now seen corresponding path program 19 times [2023-08-24 03:14:23,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:23,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748391555] [2023-08-24 03:14:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:23,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:25,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748391555] [2023-08-24 03:14:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748391555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039929540] [2023-08-24 03:14:25,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:14:25,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:25,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:25,091 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:14:25,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 03:14:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:25,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 03:14:25,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:14:25,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:25,550 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:25,551 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 58 treesize of output 60 [2023-08-24 03:14:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:14:25,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039929540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:25,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:25,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 25 [2023-08-24 03:14:25,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809174922] [2023-08-24 03:14:25,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:25,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 03:14:25,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 03:14:25,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-08-24 03:14:25,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 284 [2023-08-24 03:14:25,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 1578 transitions, 45186 flow. Second operand has 27 states, 27 states have (on average 96.0) internal successors, (2592), 27 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:25,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:25,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 284 [2023-08-24 03:14:25,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:31,816 INFO L124 PetriNetUnfolderBase]: 5053/8287 cut-off events. [2023-08-24 03:14:31,816 INFO L125 PetriNetUnfolderBase]: For 385899/385899 co-relation queries the response was YES. [2023-08-24 03:14:31,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97726 conditions, 8287 events. 5053/8287 cut-off events. For 385899/385899 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 53939 event pairs, 497 based on Foata normal form. 4/8291 useless extension candidates. Maximal degree in co-relation 97499. Up to 1739 conditions per place. [2023-08-24 03:14:31,925 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 806 selfloop transitions, 970 changer transitions 28/1804 dead transitions. [2023-08-24 03:14:31,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 1804 transitions, 52498 flow [2023-08-24 03:14:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 03:14:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 03:14:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3048 transitions. [2023-08-24 03:14:31,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35774647887323946 [2023-08-24 03:14:31,928 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3048 transitions. [2023-08-24 03:14:31,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3048 transitions. [2023-08-24 03:14:31,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:14:31,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3048 transitions. [2023-08-24 03:14:31,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 101.6) internal successors, (3048), 30 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:31,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 284.0) internal successors, (8804), 31 states have internal predecessors, (8804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:31,933 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 284.0) internal successors, (8804), 31 states have internal predecessors, (8804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:31,933 INFO L175 Difference]: Start difference. First operand has 683 places, 1578 transitions, 45186 flow. Second operand 30 states and 3048 transitions. [2023-08-24 03:14:31,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 1804 transitions, 52498 flow [2023-08-24 03:14:36,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 1804 transitions, 52329 flow, removed 48 selfloop flow, removed 11 redundant places. [2023-08-24 03:14:36,746 INFO L231 Difference]: Finished difference. Result has 707 places, 1671 transitions, 50241 flow [2023-08-24 03:14:36,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=45039, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=891, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=50241, PETRI_PLACES=707, PETRI_TRANSITIONS=1671} [2023-08-24 03:14:36,747 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 678 predicate places. [2023-08-24 03:14:36,747 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 1671 transitions, 50241 flow [2023-08-24 03:14:36,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 96.0) internal successors, (2592), 27 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:36,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:14:36,748 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] [2023-08-24 03:14:36,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-24 03:14:36,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-24 03:14:36,952 INFO L420 AbstractCegarLoop]: === Iteration 50 === 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 03:14:36,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:14:36,952 INFO L85 PathProgramCache]: Analyzing trace with hash -425944170, now seen corresponding path program 20 times [2023-08-24 03:14:36,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:14:36,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577508607] [2023-08-24 03:14:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:14:36,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:14:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:14:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:37,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:14:37,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577508607] [2023-08-24 03:14:37,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577508607] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:14:37,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975361375] [2023-08-24 03:14:37,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:14:37,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:14:37,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:14:37,858 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:14:37,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 03:14:38,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:14:38,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:14:38,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 03:14:38,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:14:38,127 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 03:14:38,166 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 03:14:38,201 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 03:14:38,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:14:38,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-08-24 03:14:38,525 INFO L322 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-08-24 03:14:38,525 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 82 treesize of output 35 [2023-08-24 03:14:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:38,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:14:39,790 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:39,790 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 130 treesize of output 94 [2023-08-24 03:14:39,880 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:14:39,881 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 2436 treesize of output 2246 [2023-08-24 03:14:39,918 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:14:39,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 269 [2023-08-24 03:14:39,997 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:14:39,997 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 291 treesize of output 265 [2023-08-24 03:14:40,072 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:14:40,072 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 229 treesize of output 234 [2023-08-24 03:14:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:14:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975361375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:14:43,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:14:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-24 03:14:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106061057] [2023-08-24 03:14:43,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:14:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 03:14:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:14:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 03:14:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1381, Unknown=16, NotChecked=0, Total=1560 [2023-08-24 03:14:43,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:14:43,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 1671 transitions, 50241 flow. Second operand has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:14:43,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:14:43,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:14:43,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:14:55,300 WARN L234 SmtUtils]: Spent 11.26s on a formula simplification. DAG size of input: 132 DAG size of output: 128 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:15:06,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:15:09,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 03:15:16,958 INFO L124 PetriNetUnfolderBase]: 5114/8557 cut-off events. [2023-08-24 03:15:16,959 INFO L125 PetriNetUnfolderBase]: For 440390/440390 co-relation queries the response was YES. [2023-08-24 03:15:17,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103717 conditions, 8557 events. 5114/8557 cut-off events. For 440390/440390 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 57685 event pairs, 772 based on Foata normal form. 3/8560 useless extension candidates. Maximal degree in co-relation 103482. Up to 4492 conditions per place. [2023-08-24 03:15:17,095 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 1435 selfloop transitions, 387 changer transitions 18/1840 dead transitions. [2023-08-24 03:15:17,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 1840 transitions, 55467 flow [2023-08-24 03:15:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 03:15:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 03:15:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3008 transitions. [2023-08-24 03:15:17,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32095603926589844 [2023-08-24 03:15:17,117 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3008 transitions. [2023-08-24 03:15:17,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3008 transitions. [2023-08-24 03:15:17,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:15:17,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3008 transitions. [2023-08-24 03:15:17,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 91.15151515151516) internal successors, (3008), 33 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:17,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 284.0) internal successors, (9656), 34 states have internal predecessors, (9656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:17,123 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 284.0) internal successors, (9656), 34 states have internal predecessors, (9656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:17,123 INFO L175 Difference]: Start difference. First operand has 707 places, 1671 transitions, 50241 flow. Second operand 33 states and 3008 transitions. [2023-08-24 03:15:17,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 1840 transitions, 55467 flow [2023-08-24 03:15:22,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 723 places, 1840 transitions, 54444 flow, removed 228 selfloop flow, removed 14 redundant places. [2023-08-24 03:15:22,615 INFO L231 Difference]: Finished difference. Result has 728 places, 1686 transitions, 50577 flow [2023-08-24 03:15:22,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=49248, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=50577, PETRI_PLACES=728, PETRI_TRANSITIONS=1686} [2023-08-24 03:15:22,616 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 699 predicate places. [2023-08-24 03:15:22,616 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 1686 transitions, 50577 flow [2023-08-24 03:15:22,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:22,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:15:22,617 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] [2023-08-24 03:15:22,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-24 03:15:22,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-24 03:15:22,821 INFO L420 AbstractCegarLoop]: === Iteration 51 === 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 03:15:22,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:15:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash 156334710, now seen corresponding path program 21 times [2023-08-24 03:15:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:15:22,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657010952] [2023-08-24 03:15:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:15:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:15:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:15:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:23,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:15:23,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657010952] [2023-08-24 03:15:23,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657010952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:15:23,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294654385] [2023-08-24 03:15:23,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:15:23,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:15:23,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:15:23,738 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:15:23,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 03:15:24,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:15:24,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:15:24,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 03:15:24,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:15:24,101 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 03:15:24,143 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 03:15:24,178 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 03:15:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:15:24,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-08-24 03:15:24,525 INFO L322 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-08-24 03:15:24,526 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 85 treesize of output 35 [2023-08-24 03:15:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:24,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:15:30,489 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:30,489 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 134 treesize of output 98 [2023-08-24 03:15:30,566 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 03:15:30,567 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 39468 treesize of output 36160 [2023-08-24 03:15:30,595 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:15:30,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:30,636 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 347 treesize of output 352 [2023-08-24 03:15:30,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 03:15:30,684 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:30,686 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 316 treesize of output 290 [2023-08-24 03:15:30,718 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-24 03:15:30,718 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 305 treesize of output 239 [2023-08-24 03:15:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:34,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294654385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:15:34,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:15:34,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-24 03:15:34,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964467466] [2023-08-24 03:15:34,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:15:34,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 03:15:34,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:15:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 03:15:34,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1474, Unknown=11, NotChecked=0, Total=1640 [2023-08-24 03:15:34,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:15:34,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1686 transitions, 50577 flow. Second operand has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:34,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:15:34,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:15:34,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:15:40,209 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 03:15:49,661 INFO L124 PetriNetUnfolderBase]: 5203/8706 cut-off events. [2023-08-24 03:15:49,662 INFO L125 PetriNetUnfolderBase]: For 458044/458044 co-relation queries the response was YES. [2023-08-24 03:15:49,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106257 conditions, 8706 events. 5203/8706 cut-off events. For 458044/458044 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 58514 event pairs, 966 based on Foata normal form. 4/8710 useless extension candidates. Maximal degree in co-relation 106019. Up to 4491 conditions per place. [2023-08-24 03:15:49,801 INFO L140 encePairwiseOnDemand]: 272/284 looper letters, 1498 selfloop transitions, 272 changer transitions 34/1804 dead transitions. [2023-08-24 03:15:49,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 749 places, 1804 transitions, 55851 flow [2023-08-24 03:15:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 03:15:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 03:15:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2271 transitions. [2023-08-24 03:15:49,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31985915492957745 [2023-08-24 03:15:49,803 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2271 transitions. [2023-08-24 03:15:49,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2271 transitions. [2023-08-24 03:15:49,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:15:49,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2271 transitions. [2023-08-24 03:15:49,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 90.84) internal successors, (2271), 25 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:49,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 284.0) internal successors, (7384), 26 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:49,812 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 284.0) internal successors, (7384), 26 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:49,812 INFO L175 Difference]: Start difference. First operand has 728 places, 1686 transitions, 50577 flow. Second operand 25 states and 2271 transitions. [2023-08-24 03:15:49,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 749 places, 1804 transitions, 55851 flow [2023-08-24 03:15:55,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 1804 transitions, 55386 flow, removed 26 selfloop flow, removed 17 redundant places. [2023-08-24 03:15:55,629 INFO L231 Difference]: Finished difference. Result has 736 places, 1696 transitions, 51172 flow [2023-08-24 03:15:55,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=50135, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=51172, PETRI_PLACES=736, PETRI_TRANSITIONS=1696} [2023-08-24 03:15:55,630 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 707 predicate places. [2023-08-24 03:15:55,630 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 1696 transitions, 51172 flow [2023-08-24 03:15:55,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:15:55,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:15:55,630 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] [2023-08-24 03:15:55,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 03:15:55,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-24 03:15:55,835 INFO L420 AbstractCegarLoop]: === Iteration 52 === 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 03:15:55,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:15:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1711123722, now seen corresponding path program 22 times [2023-08-24 03:15:55,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:15:55,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601669802] [2023-08-24 03:15:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:15:55,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:15:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:15:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:56,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:15:56,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601669802] [2023-08-24 03:15:56,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601669802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:15:56,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990431980] [2023-08-24 03:15:56,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:15:56,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:15:56,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:15:56,816 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:15:56,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-24 03:15:57,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:15:57,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:15:57,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-24 03:15:57,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:15:57,104 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 03:15:57,147 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 03:15:57,193 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 03:15:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:15:57,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-08-24 03:15:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:15:57,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:15:58,259 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 (+ c_~start~0 1)) (< c_~start~0 0) (let ((.cse19 (* c_~end~0 4))) (let ((.cse20 (* c_~start~0 4)) (.cse18 (mod (select (select |c_#memory_int| c_~queue~0.base) (+ .cse19 c_~queue~0.offset)) 4294967296)) (.cse0 (mod |c_thread1Thread1of1ForFork1_~x~0#1| 4294967296))) (let ((.cse6 (+ .cse18 .cse0)) (.cse3 (+ .cse20 c_~queue~0.offset 4)) (.cse4 (+ .cse20 c_~queue~0.offset)) (.cse7 (mod |c_thread2Thread1of1ForFork2_~x~1#1| 4294967296)) (.cse8 (+ .cse19 c_~queue~0.offset 4))) (and (forall ((v_ArrVal_2411 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2411) c_~queue~0.base))) (let ((.cse1 (mod (select .cse2 .cse8) 4294967296))) (or (<= .cse0 .cse1) (= (mod (select .cse2 .cse3) 4294967296) (mod (select .cse2 .cse4) 4294967296)) (forall ((v_y_1239 Int)) (let ((.cse5 (* 4294967296 v_y_1239))) (or (<= .cse0 (+ .cse1 .cse5)) (not (= .cse6 (+ .cse7 .cse1 .cse5)))))))))) (forall ((v_ArrVal_2411 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2411) c_~queue~0.base))) (let ((.cse9 (mod (select .cse10 .cse8) 4294967296))) (or (<= .cse0 .cse9) (= (mod (select .cse10 .cse3) 4294967296) (mod (select .cse10 .cse4) 4294967296)) (forall ((v_y_1239 Int)) (let ((.cse11 (* 4294967296 v_y_1239))) (or (not (= .cse6 (+ .cse7 .cse9 .cse11 4294967296))) (< (+ .cse9 .cse11 4294967296) .cse0)))))))) (forall ((v_ArrVal_2411 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2411) c_~queue~0.base))) (let ((.cse12 (mod (select .cse14 .cse8) 4294967296))) (or (forall ((v_y_1239 Int)) (let ((.cse13 (* 4294967296 v_y_1239))) (or (not (= .cse6 (+ .cse7 .cse12 .cse13))) (< (+ .cse12 .cse13) .cse0)))) (= (mod (select .cse14 .cse3) 4294967296) (mod (select .cse14 .cse4) 4294967296)) (< .cse12 .cse0))))) (forall ((v_ArrVal_2411 (Array Int Int))) (let ((.cse15 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2411) c_~queue~0.base))) (let ((.cse16 (mod (select .cse15 .cse8) 4294967296))) (or (= (mod (select .cse15 .cse3) 4294967296) (mod (select .cse15 .cse4) 4294967296)) (< .cse16 .cse0) (forall ((v_y_1239 Int)) (let ((.cse17 (* 4294967296 v_y_1239))) (or (<= (+ .cse0 4294967296) (+ .cse16 .cse17)) (not (= (+ .cse18 .cse0 4294967296) (+ .cse7 .cse16 .cse17))))))))))))))) is different from false [2023-08-24 03:15:58,926 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:58,928 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 135 treesize of output 99 [2023-08-24 03:15:58,979 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:58,980 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 1368 treesize of output 1287 [2023-08-24 03:15:59,004 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:59,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 406 [2023-08-24 03:15:59,047 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:59,047 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 388 treesize of output 360 [2023-08-24 03:15:59,094 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:15:59,094 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 261 treesize of output 265 [2023-08-24 03:16:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 03:16:34,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990431980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:16:34,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:16:34,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-08-24 03:16:34,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861764962] [2023-08-24 03:16:34,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:16:34,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 03:16:34,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:16:34,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 03:16:34,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1321, Unknown=13, NotChecked=74, Total=1560 [2023-08-24 03:16:34,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 284 [2023-08-24 03:16:34,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 1696 transitions, 51172 flow. Second operand has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:16:34,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:16:34,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 284 [2023-08-24 03:16:34,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:16:46,192 WARN L234 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:16:54,234 WARN L234 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:17:00,951 INFO L124 PetriNetUnfolderBase]: 5186/8636 cut-off events. [2023-08-24 03:17:00,951 INFO L125 PetriNetUnfolderBase]: For 469176/469176 co-relation queries the response was YES. [2023-08-24 03:17:01,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105654 conditions, 8636 events. 5186/8636 cut-off events. For 469176/469176 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 57819 event pairs, 891 based on Foata normal form. 2/8638 useless extension candidates. Maximal degree in co-relation 105415. Up to 3328 conditions per place. [2023-08-24 03:17:01,100 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 1183 selfloop transitions, 718 changer transitions 28/1929 dead transitions. [2023-08-24 03:17:01,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 1929 transitions, 57940 flow [2023-08-24 03:17:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 03:17:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 03:17:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3330 transitions. [2023-08-24 03:17:01,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31690140845070425 [2023-08-24 03:17:01,104 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3330 transitions. [2023-08-24 03:17:01,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3330 transitions. [2023-08-24 03:17:01,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:17:01,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3330 transitions. [2023-08-24 03:17:01,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:01,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 284.0) internal successors, (10792), 38 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:01,125 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 284.0) internal successors, (10792), 38 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:01,126 INFO L175 Difference]: Start difference. First operand has 736 places, 1696 transitions, 51172 flow. Second operand 37 states and 3330 transitions. [2023-08-24 03:17:01,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 1929 transitions, 57940 flow [2023-08-24 03:17:06,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 750 places, 1929 transitions, 57658 flow, removed 20 selfloop flow, removed 18 redundant places. [2023-08-24 03:17:06,371 INFO L231 Difference]: Finished difference. Result has 757 places, 1732 transitions, 53128 flow [2023-08-24 03:17:06,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=50898, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=53128, PETRI_PLACES=757, PETRI_TRANSITIONS=1732} [2023-08-24 03:17:06,372 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 728 predicate places. [2023-08-24 03:17:06,372 INFO L495 AbstractCegarLoop]: Abstraction has has 757 places, 1732 transitions, 53128 flow [2023-08-24 03:17:06,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.725) internal successors, (3429), 40 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:06,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:17:06,373 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] [2023-08-24 03:17:06,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-24 03:17:06,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:17:06,594 INFO L420 AbstractCegarLoop]: === Iteration 53 === 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 03:17:06,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:17:06,594 INFO L85 PathProgramCache]: Analyzing trace with hash 385446604, now seen corresponding path program 23 times [2023-08-24 03:17:06,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:17:06,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104967465] [2023-08-24 03:17:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:17:06,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:17:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:17:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:17:07,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:17:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104967465] [2023-08-24 03:17:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104967465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:17:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261641697] [2023-08-24 03:17:07,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:17:07,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:17:07,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:17:07,654 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:17:07,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-24 03:17:07,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:17:07,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:17:07,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 03:17:07,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:17:08,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:17:08,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-08-24 03:17:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:17:08,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:17:08,710 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:17:08,710 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 89 treesize of output 91 [2023-08-24 03:17:08,790 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:17:08,790 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 20 treesize of output 7 [2023-08-24 03:17:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:17:09,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261641697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:17:09,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:17:09,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-24 03:17:09,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371937807] [2023-08-24 03:17:09,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:17:09,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 03:17:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:17:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 03:17:09,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1222, Unknown=1, NotChecked=0, Total=1406 [2023-08-24 03:17:09,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 284 [2023-08-24 03:17:09,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 757 places, 1732 transitions, 53128 flow. Second operand has 38 states, 38 states have (on average 91.8157894736842) internal successors, (3489), 38 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:09,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:17:09,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 284 [2023-08-24 03:17:09,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:17:14,044 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 [] [2023-08-24 03:17:18,382 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 03:17:22,527 INFO L124 PetriNetUnfolderBase]: 5232/8798 cut-off events. [2023-08-24 03:17:22,527 INFO L125 PetriNetUnfolderBase]: For 486647/486647 co-relation queries the response was YES. [2023-08-24 03:17:22,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108948 conditions, 8798 events. 5232/8798 cut-off events. For 486647/486647 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 59693 event pairs, 702 based on Foata normal form. 10/8807 useless extension candidates. Maximal degree in co-relation 108706. Up to 1943 conditions per place. [2023-08-24 03:17:22,671 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 999 selfloop transitions, 864 changer transitions 76/1939 dead transitions. [2023-08-24 03:17:22,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 794 places, 1939 transitions, 59030 flow [2023-08-24 03:17:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 03:17:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 03:17:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3964 transitions. [2023-08-24 03:17:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404328409481278 [2023-08-24 03:17:22,674 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3964 transitions. [2023-08-24 03:17:22,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3964 transitions. [2023-08-24 03:17:22,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:17:22,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3964 transitions. [2023-08-24 03:17:22,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 96.6829268292683) internal successors, (3964), 41 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:22,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 284.0) internal successors, (11928), 42 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:22,681 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 284.0) internal successors, (11928), 42 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:22,681 INFO L175 Difference]: Start difference. First operand has 757 places, 1732 transitions, 53128 flow. Second operand 41 states and 3964 transitions. [2023-08-24 03:17:22,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 794 places, 1939 transitions, 59030 flow [2023-08-24 03:17:28,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1939 transitions, 57679 flow, removed 101 selfloop flow, removed 24 redundant places. [2023-08-24 03:17:28,789 INFO L231 Difference]: Finished difference. Result has 783 places, 1738 transitions, 53988 flow [2023-08-24 03:17:28,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=51793, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=842, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=871, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=53988, PETRI_PLACES=783, PETRI_TRANSITIONS=1738} [2023-08-24 03:17:28,791 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 754 predicate places. [2023-08-24 03:17:28,791 INFO L495 AbstractCegarLoop]: Abstraction has has 783 places, 1738 transitions, 53988 flow [2023-08-24 03:17:28,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 91.8157894736842) internal successors, (3489), 38 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:28,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:17:28,791 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] [2023-08-24 03:17:28,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-24 03:17:28,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-24 03:17:28,996 INFO L420 AbstractCegarLoop]: === Iteration 54 === 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 03:17:28,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:17:28,997 INFO L85 PathProgramCache]: Analyzing trace with hash 113472166, now seen corresponding path program 24 times [2023-08-24 03:17:28,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:17:28,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62795209] [2023-08-24 03:17:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:17:28,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:17:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:17:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:17:29,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:17:29,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62795209] [2023-08-24 03:17:29,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62795209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:17:29,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532511269] [2023-08-24 03:17:29,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:17:29,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:17:29,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:17:29,675 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:17:29,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-24 03:17:29,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:17:29,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:17:29,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 03:17:29,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:17:30,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:17:30,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-08-24 03:17:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:17:30,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:17:30,493 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:17:30,494 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 112 treesize of output 114 [2023-08-24 03:17:30,515 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:17:30,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-08-24 03:17:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:17:30,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532511269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:17:30,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:17:30,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 32 [2023-08-24 03:17:30,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999389860] [2023-08-24 03:17:30,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:17:30,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 03:17:30,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:17:30,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 03:17:30,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1005, Unknown=13, NotChecked=0, Total=1122 [2023-08-24 03:17:30,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 284 [2023-08-24 03:17:30,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 783 places, 1738 transitions, 53988 flow. Second operand has 34 states, 34 states have (on average 91.88235294117646) internal successors, (3124), 34 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:17:30,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:17:30,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 284 [2023-08-24 03:17:30,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:17:47,317 WARN L234 SmtUtils]: Spent 14.32s on a formula simplification. DAG size of input: 91 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:17:49,969 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 03:17:51,979 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 03:18:17,234 WARN L234 SmtUtils]: Spent 24.39s on a formula simplification. DAG size of input: 83 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:18:32,375 WARN L234 SmtUtils]: Spent 14.27s on a formula simplification. DAG size of input: 93 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:18:58,431 WARN L234 SmtUtils]: Spent 24.35s on a formula simplification. DAG size of input: 85 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 03:19:00,190 INFO L124 PetriNetUnfolderBase]: 5187/8642 cut-off events. [2023-08-24 03:19:00,190 INFO L125 PetriNetUnfolderBase]: For 485055/485055 co-relation queries the response was YES. [2023-08-24 03:19:00,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109198 conditions, 8642 events. 5187/8642 cut-off events. For 485055/485055 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 57967 event pairs, 436 based on Foata normal form. 3/8645 useless extension candidates. Maximal degree in co-relation 108949. Up to 1574 conditions per place. [2023-08-24 03:19:00,318 INFO L140 encePairwiseOnDemand]: 271/284 looper letters, 873 selfloop transitions, 1047 changer transitions 42/1962 dead transitions. [2023-08-24 03:19:00,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 1962 transitions, 59710 flow [2023-08-24 03:19:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 03:19:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 03:19:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4105 transitions. [2023-08-24 03:19:00,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441482226693494 [2023-08-24 03:19:00,322 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4105 transitions. [2023-08-24 03:19:00,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4105 transitions. [2023-08-24 03:19:00,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:00,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4105 transitions. [2023-08-24 03:19:00,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 97.73809523809524) internal successors, (4105), 42 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:00,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 284.0) internal successors, (12212), 43 states have internal predecessors, (12212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:00,329 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 284.0) internal successors, (12212), 43 states have internal predecessors, (12212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:00,329 INFO L175 Difference]: Start difference. First operand has 783 places, 1738 transitions, 53988 flow. Second operand 42 states and 4105 transitions. [2023-08-24 03:19:00,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 1962 transitions, 59710 flow [2023-08-24 03:19:05,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 1962 transitions, 58777 flow, removed 91 selfloop flow, removed 27 redundant places. [2023-08-24 03:19:05,920 INFO L231 Difference]: Finished difference. Result has 792 places, 1738 transitions, 55603 flow [2023-08-24 03:19:05,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=53127, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=55603, PETRI_PLACES=792, PETRI_TRANSITIONS=1738} [2023-08-24 03:19:05,922 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 763 predicate places. [2023-08-24 03:19:05,922 INFO L495 AbstractCegarLoop]: Abstraction has has 792 places, 1738 transitions, 55603 flow [2023-08-24 03:19:05,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 91.88235294117646) internal successors, (3124), 34 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:05,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:05,922 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] [2023-08-24 03:19:05,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:06,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:06,128 INFO L420 AbstractCegarLoop]: === Iteration 55 === 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 03:19:06,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash 45913314, now seen corresponding path program 25 times [2023-08-24 03:19:06,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:06,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344113171] [2023-08-24 03:19:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:06,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344113171] [2023-08-24 03:19:06,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344113171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395405728] [2023-08-24 03:19:06,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:19:06,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:06,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:06,795 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:19:06,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-24 03:19:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:06,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 03:19:06,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:07,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:19:07,297 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-08-24 03:19:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:07,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:07,647 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:19:07,647 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 87 treesize of output 89 [2023-08-24 03:19:07,654 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:19:07,654 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 20 treesize of output 7 [2023-08-24 03:19:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:08,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395405728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:08,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:08,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-24 03:19:08,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815625397] [2023-08-24 03:19:08,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:08,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 03:19:08,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 03:19:08,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1263, Unknown=1, NotChecked=0, Total=1406 [2023-08-24 03:19:08,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 284 [2023-08-24 03:19:08,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 1738 transitions, 55603 flow. Second operand has 38 states, 38 states have (on average 91.8157894736842) internal successors, (3489), 38 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:08,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:08,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 284 [2023-08-24 03:19:08,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 03:19:12,901 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 03:19:12,904 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 03:19:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 03:19:12,916 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 03:19:12,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:13,117 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (38states, 90/284 universal loopers) in iteration 55,while PetriNetUnfolder was constructing finite prefix that currently has 10297 conditions, 797 events (418/796 cut-off events. For 55875/55875 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 5604 event pairs, 38 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 10048. Up to 140 conditions per place.). [2023-08-24 03:19:13,118 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 03:19:13,118 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 03:19:13,118 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 03:19:13,118 INFO L445 BasicCegarLoop]: Path program histogram: [25, 23, 5, 1, 1] [2023-08-24 03:19:13,120 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 03:19:13,120 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 03:19:13,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:19:13 BasicIcfg [2023-08-24 03:19:13,122 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 03:19:13,122 INFO L158 Benchmark]: Toolchain (without parser) took 837054.75ms. Allocated memory was 398.5MB in the beginning and 4.7GB in the end (delta: 4.3GB). Free memory was 374.8MB in the beginning and 2.2GB in the end (delta: -1.8GB). Peak memory consumption was 2.5GB. Max. memory is 16.0GB. [2023-08-24 03:19:13,122 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 398.5MB. Free memory is still 375.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 03:19:13,122 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.74ms. Allocated memory is still 398.5MB. Free memory was 374.8MB in the beginning and 362.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 03:19:13,122 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.81ms. Allocated memory is still 398.5MB. Free memory was 362.8MB in the beginning and 360.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 03:19:13,122 INFO L158 Benchmark]: Boogie Preprocessor took 31.64ms. Allocated memory is still 398.5MB. Free memory was 360.8MB in the beginning and 359.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 03:19:13,123 INFO L158 Benchmark]: RCFGBuilder took 458.70ms. Allocated memory is still 398.5MB. Free memory was 359.2MB in the beginning and 332.5MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-24 03:19:13,123 INFO L158 Benchmark]: TraceAbstraction took 836302.70ms. Allocated memory was 398.5MB in the beginning and 4.7GB in the end (delta: 4.3GB). Free memory was 331.4MB 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 03:19:13,123 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 398.5MB. Free memory is still 375.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 210.74ms. Allocated memory is still 398.5MB. Free memory was 374.8MB in the beginning and 362.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.81ms. Allocated memory is still 398.5MB. Free memory was 362.8MB in the beginning and 360.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.64ms. Allocated memory is still 398.5MB. Free memory was 360.8MB in the beginning and 359.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 458.70ms. Allocated memory is still 398.5MB. Free memory was 359.2MB in the beginning and 332.5MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 836302.70ms. Allocated memory was 398.5MB in the beginning and 4.7GB in the end (delta: 4.3GB). Free memory was 331.4MB 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: 4.0s, 140 PlacesBefore, 29 PlacesAfterwards, 139 TransitionsBefore, 22 TransitionsAfterwards, 1600 CoEnabledTransitionPairs, 7 FixpointIterations, 76 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 132 TotalNumberOfCompositions, 1697 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1444, independent: 1411, independent conditional: 0, independent unconditional: 1411, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 842, independent: 830, independent conditional: 0, independent unconditional: 830, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1444, independent: 581, independent conditional: 0, independent unconditional: 581, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 842, unknown conditional: 0, unknown unconditional: 842] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 34, Positive conditional cache size: 0, Positive unconditional cache size: 34, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (38states, 90/284 universal loopers) in iteration 55,while PetriNetUnfolder was constructing finite prefix that currently has 10297 conditions, 797 events (418/796 cut-off events. For 55875/55875 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 5604 event pairs, 38 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 10048. Up to 140 conditions per place.). - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (38states, 90/284 universal loopers) in iteration 55,while PetriNetUnfolder was constructing finite prefix that currently has 10297 conditions, 797 events (418/796 cut-off events. For 55875/55875 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 5604 event pairs, 38 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 10048. Up to 140 conditions per place.). - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (38states, 90/284 universal loopers) in iteration 55,while PetriNetUnfolder was constructing finite prefix that currently has 10297 conditions, 797 events (418/796 cut-off events. For 55875/55875 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 5604 event pairs, 38 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 10048. Up to 140 conditions per place.). - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (38states, 90/284 universal loopers) in iteration 55,while PetriNetUnfolder was constructing finite prefix that currently has 10297 conditions, 797 events (418/796 cut-off events. For 55875/55875 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 5604 event pairs, 38 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 10048. Up to 140 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 180 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: 836.2s, OverallIterations: 55, TraceHistogramMax: 3, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 546.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 612 mSolverCounterUnknown, 12092 SdHoareTripleChecker+Valid, 102.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12092 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 97.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1257 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2359 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51224 IncrementalHoareTripleChecker+Invalid, 55452 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2359 mSolverCounterUnsat, 0 mSDtfsCounter, 51224 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3241 GetRequests, 967 SyntacticMatches, 12 SemanticMatches, 2262 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 29985 ImplicationChecksByTransitivity, 366.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55603occurred in iteration=54, InterpolantAutomatonStates: 1193, 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, 3.4s SatisfiabilityAnalysisTime, 267.2s InterpolantComputationTime, 2264 NumberOfCodeBlocks, 2239 NumberOfCodeBlocksAsserted, 137 NumberOfCheckSat, 2936 ConstructedInterpolants, 149 QuantifiedInterpolants, 115205 SizeOfPredicates, 903 NumberOfNonLiveVariables, 11339 ConjunctsInSsa, 1955 ConjunctsInUnsatCore, 138 InterpolantComputations, 25 PerfectInterpolantSequences, 149/636 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