/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 13:55:32,131 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 13:55:32,202 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 13:55:32,209 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 13:55:32,210 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 13:55:32,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 13:55:32,244 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 13:55:32,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 13:55:32,245 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 13:55:32,248 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 13:55:32,249 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 13:55:32,249 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 13:55:32,249 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 13:55:32,250 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 13:55:32,250 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 13:55:32,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 13:55:32,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 13:55:32,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 13:55:32,251 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 13:55:32,251 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 13:55:32,252 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 13:55:32,252 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 13:55:32,253 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 13:55:32,253 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 13:55:32,253 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 13:55:32,253 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 13:55:32,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 13:55:32,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:55:32,254 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 13:55:32,254 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 13:55:32,255 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 13:55:32,255 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 13:55:32,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 13:55:32,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 13:55:32,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 13:55:32,256 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 13:55:32,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 13:55:32,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 13:55:32,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 13:55:32,565 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 13:55:32,565 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 13:55:32,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-08-24 13:55:33,631 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 13:55:33,847 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 13:55:33,847 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-08-24 13:55:33,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71afcade2/b89ae4df99384c06bb195841ae3097e9/FLAGf94c659be [2023-08-24 13:55:33,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71afcade2/b89ae4df99384c06bb195841ae3097e9 [2023-08-24 13:55:33,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 13:55:33,876 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 13:55:33,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 13:55:33,877 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 13:55:33,879 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 13:55:33,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:55:33" (1/1) ... [2023-08-24 13:55:33,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a24760c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:33, skipping insertion in model container [2023-08-24 13:55:33,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:55:33" (1/1) ... [2023-08-24 13:55:33,907 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 13:55:34,078 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/chl-nzb-file-subst.wvr.c[6501,6514] [2023-08-24 13:55:34,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:55:34,091 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 13:55:34,139 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/chl-nzb-file-subst.wvr.c[6501,6514] [2023-08-24 13:55:34,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:55:34,166 INFO L206 MainTranslator]: Completed translation [2023-08-24 13:55:34,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34 WrapperNode [2023-08-24 13:55:34,166 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 13:55:34,168 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 13:55:34,169 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 13:55:34,169 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 13:55:34,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,252 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 604 [2023-08-24 13:55:34,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 13:55:34,254 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 13:55:34,254 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 13:55:34,254 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 13:55:34,261 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,277 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,278 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,308 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,329 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 13:55:34,330 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 13:55:34,330 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 13:55:34,330 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 13:55:34,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (1/1) ... [2023-08-24 13:55:34,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:55:34,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:55:34,362 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 13:55:34,385 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 13:55:34,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 13:55:34,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 13:55:34,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 13:55:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 13:55:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 13:55:34,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 13:55:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 13:55:34,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 13:55:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 13:55:34,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 13:55:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 13:55:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 13:55:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 13:55:34,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 13:55:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 13:55:34,403 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 13:55:34,528 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 13:55:34,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 13:55:35,273 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 13:55:35,282 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 13:55:35,282 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 13:55:35,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:55:35 BoogieIcfgContainer [2023-08-24 13:55:35,285 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 13:55:35,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 13:55:35,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 13:55:35,290 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 13:55:35,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:55:33" (1/3) ... [2023-08-24 13:55:35,290 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bda1256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:55:35, skipping insertion in model container [2023-08-24 13:55:35,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:55:34" (2/3) ... [2023-08-24 13:55:35,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bda1256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:55:35, skipping insertion in model container [2023-08-24 13:55:35,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:55:35" (3/3) ... [2023-08-24 13:55:35,292 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2023-08-24 13:55:35,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 13:55:35,307 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 13:55:35,307 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 13:55:35,452 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 13:55:35,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 657 places, 720 transitions, 1464 flow [2023-08-24 13:55:35,782 INFO L124 PetriNetUnfolderBase]: 73/717 cut-off events. [2023-08-24 13:55:35,783 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:55:35,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 717 events. 73/717 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2387 event pairs, 0 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 535. Up to 2 conditions per place. [2023-08-24 13:55:35,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 657 places, 720 transitions, 1464 flow [2023-08-24 13:55:35,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 644 places, 707 transitions, 1432 flow [2023-08-24 13:55:35,824 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:55:35,837 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 644 places, 707 transitions, 1432 flow [2023-08-24 13:55:35,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 644 places, 707 transitions, 1432 flow [2023-08-24 13:55:35,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 644 places, 707 transitions, 1432 flow [2023-08-24 13:55:36,058 INFO L124 PetriNetUnfolderBase]: 73/707 cut-off events. [2023-08-24 13:55:36,058 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:55:36,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 707 events. 73/707 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2389 event pairs, 0 based on Foata normal form. 0/634 useless extension candidates. Maximal degree in co-relation 535. Up to 2 conditions per place. [2023-08-24 13:55:36,115 INFO L119 LiptonReduction]: Number of co-enabled transitions 157248 [2023-08-24 13:56:01,071 INFO L134 LiptonReduction]: Checked pairs total: 151635 [2023-08-24 13:56:01,071 INFO L136 LiptonReduction]: Total number of compositions: 895 [2023-08-24 13:56:01,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:56:01,087 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;@514d1442, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:56:01,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 13:56:01,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:56:01,099 INFO L124 PetriNetUnfolderBase]: 13/48 cut-off events. [2023-08-24 13:56:01,099 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:56:01,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:01,100 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 13:56:01,100 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 13:56:01,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:01,104 INFO L85 PathProgramCache]: Analyzing trace with hash -544715285, now seen corresponding path program 1 times [2023-08-24 13:56:01,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:01,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827691561] [2023-08-24 13:56:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:01,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:01,554 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 13:56:01,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827691561] [2023-08-24 13:56:01,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827691561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:01,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:01,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 13:56:01,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701077357] [2023-08-24 13:56:01,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:01,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:56:01,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:56:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:56:01,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 643 out of 1615 [2023-08-24 13:56:01,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 649.3333333333334) internal successors, (1948), 3 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:01,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:01,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 643 of 1615 [2023-08-24 13:56:01,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:02,271 INFO L124 PetriNetUnfolderBase]: 2694/3589 cut-off events. [2023-08-24 13:56:02,271 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2023-08-24 13:56:02,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7439 conditions, 3589 events. 2694/3589 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12602 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 6908. Up to 3587 conditions per place. [2023-08-24 13:56:02,288 INFO L140 encePairwiseOnDemand]: 1607/1615 looper letters, 45 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2023-08-24 13:56:02,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 222 flow [2023-08-24 13:56:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:56:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:56:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1984 transitions. [2023-08-24 13:56:02,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40949432404540764 [2023-08-24 13:56:02,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1984 transitions. [2023-08-24 13:56:02,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1984 transitions. [2023-08-24 13:56:02,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:02,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1984 transitions. [2023-08-24 13:56:02,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 661.3333333333334) internal successors, (1984), 3 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:02,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1615.0) internal successors, (6460), 4 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:02,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1615.0) internal successors, (6460), 4 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:02,344 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 116 flow. Second operand 3 states and 1984 transitions. [2023-08-24 13:56:02,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 222 flow [2023-08-24 13:56:02,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 210 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 13:56:02,352 INFO L231 Difference]: Finished difference. Result has 43 places, 51 transitions, 134 flow [2023-08-24 13:56:02,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=51} [2023-08-24 13:56:02,357 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-24 13:56:02,357 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 51 transitions, 134 flow [2023-08-24 13:56:02,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 649.3333333333334) internal successors, (1948), 3 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:02,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:02,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:02,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 13:56:02,359 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 13:56:02,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash -705807123, now seen corresponding path program 1 times [2023-08-24 13:56:02,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:02,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459190034] [2023-08-24 13:56:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:02,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:56:02,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:02,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459190034] [2023-08-24 13:56:02,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459190034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:56:02,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862965650] [2023-08-24 13:56:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:02,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:56:02,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:56:02,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:56:02,643 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 13:56:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:02,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 13:56:02,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:56:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:56:02,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:56:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:56:02,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862965650] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:56:02,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:56:02,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-24 13:56:02,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921881882] [2023-08-24 13:56:02,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:56:02,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 13:56:02,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 13:56:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-24 13:56:02,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 643 out of 1615 [2023-08-24 13:56:02,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 51 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 646.5) internal successors, (5172), 8 states have internal predecessors, (5172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:02,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:02,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 643 of 1615 [2023-08-24 13:56:02,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:03,509 INFO L124 PetriNetUnfolderBase]: 2694/3598 cut-off events. [2023-08-24 13:56:03,510 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-24 13:56:03,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7333 conditions, 3598 events. 2694/3598 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12611 event pairs, 1657 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 7284. Up to 3587 conditions per place. [2023-08-24 13:56:03,525 INFO L140 encePairwiseOnDemand]: 1608/1615 looper letters, 45 selfloop transitions, 15 changer transitions 0/60 dead transitions. [2023-08-24 13:56:03,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 290 flow [2023-08-24 13:56:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:56:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:56:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3927 transitions. [2023-08-24 13:56:03,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052631578947368 [2023-08-24 13:56:03,536 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3927 transitions. [2023-08-24 13:56:03,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3927 transitions. [2023-08-24 13:56:03,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:03,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3927 transitions. [2023-08-24 13:56:03,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 654.5) internal successors, (3927), 6 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:03,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1615.0) internal successors, (11305), 7 states have internal predecessors, (11305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:03,565 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1615.0) internal successors, (11305), 7 states have internal predecessors, (11305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:03,566 INFO L175 Difference]: Start difference. First operand has 43 places, 51 transitions, 134 flow. Second operand 6 states and 3927 transitions. [2023-08-24 13:56:03,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 290 flow [2023-08-24 13:56:03,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:56:03,568 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 224 flow [2023-08-24 13:56:03,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2023-08-24 13:56:03,569 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-24 13:56:03,569 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 224 flow [2023-08-24 13:56:03,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 646.5) internal successors, (5172), 8 states have internal predecessors, (5172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:03,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:03,572 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:03,579 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 13:56:03,772 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 13:56:03,773 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 13:56:03,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:03,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1135023085, now seen corresponding path program 2 times [2023-08-24 13:56:03,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:03,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506808985] [2023-08-24 13:56:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:03,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:56:04,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:04,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506808985] [2023-08-24 13:56:04,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506808985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:56:04,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535131453] [2023-08-24 13:56:04,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:56:04,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:56:04,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:56:04,010 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 13:56:04,017 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 13:56:04,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 13:56:04,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:56:04,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 13:56:04,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:56:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:56:05,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:56:05,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535131453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:05,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:56:05,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 13:56:05,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174094934] [2023-08-24 13:56:05,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:05,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:56:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:05,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:56:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:56:05,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 618 out of 1615 [2023-08-24 13:56:05,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:05,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:05,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 618 of 1615 [2023-08-24 13:56:05,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:06,519 INFO L124 PetriNetUnfolderBase]: 3034/4117 cut-off events. [2023-08-24 13:56:06,520 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-24 13:56:06,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8413 conditions, 4117 events. 3034/4117 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15798 event pairs, 1657 based on Foata normal form. 1/2930 useless extension candidates. Maximal degree in co-relation 8325. Up to 3517 conditions per place. [2023-08-24 13:56:06,543 INFO L140 encePairwiseOnDemand]: 1611/1615 looper letters, 98 selfloop transitions, 2 changer transitions 7/107 dead transitions. [2023-08-24 13:56:06,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 107 transitions, 544 flow [2023-08-24 13:56:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:56:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:56:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3186 transitions. [2023-08-24 13:56:06,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945510835913313 [2023-08-24 13:56:06,553 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3186 transitions. [2023-08-24 13:56:06,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3186 transitions. [2023-08-24 13:56:06,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:06,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3186 transitions. [2023-08-24 13:56:06,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 637.2) internal successors, (3186), 5 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:06,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:06,576 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:06,576 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 224 flow. Second operand 5 states and 3186 transitions. [2023-08-24 13:56:06,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 107 transitions, 544 flow [2023-08-24 13:56:06,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 107 transitions, 520 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-24 13:56:06,580 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 215 flow [2023-08-24 13:56:06,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-08-24 13:56:06,581 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-24 13:56:06,581 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 215 flow [2023-08-24 13:56:06,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:06,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:06,583 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:06,594 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 13:56:06,789 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 13:56:06,790 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 13:56:06,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash -142941975, now seen corresponding path program 3 times [2023-08-24 13:56:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:06,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532515261] [2023-08-24 13:56:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:06,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:56:06,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:06,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532515261] [2023-08-24 13:56:06,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532515261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:56:06,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442405853] [2023-08-24 13:56:06,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:56:06,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:56:06,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:56:06,985 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 13:56:07,003 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 13:56:07,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 13:56:07,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:56:07,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 13:56:07,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:56:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:56:07,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:56:07,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442405853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:07,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:56:07,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 13:56:07,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164428853] [2023-08-24 13:56:07,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:07,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:56:07,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:07,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:56:07,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:56:07,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 618 out of 1615 [2023-08-24 13:56:07,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:07,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:07,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 618 of 1615 [2023-08-24 13:56:07,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:09,166 INFO L124 PetriNetUnfolderBase]: 3224/4457 cut-off events. [2023-08-24 13:56:09,166 INFO L125 PetriNetUnfolderBase]: For 719/719 co-relation queries the response was YES. [2023-08-24 13:56:09,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9603 conditions, 4457 events. 3224/4457 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18151 event pairs, 1919 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 9571. Up to 3969 conditions per place. [2023-08-24 13:56:09,187 INFO L140 encePairwiseOnDemand]: 1611/1615 looper letters, 101 selfloop transitions, 3 changer transitions 7/111 dead transitions. [2023-08-24 13:56:09,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 559 flow [2023-08-24 13:56:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:56:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:56:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3189 transitions. [2023-08-24 13:56:09,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39492260061919504 [2023-08-24 13:56:09,195 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3189 transitions. [2023-08-24 13:56:09,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3189 transitions. [2023-08-24 13:56:09,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:09,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3189 transitions. [2023-08-24 13:56:09,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 637.8) internal successors, (3189), 5 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:09,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:09,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:09,216 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 215 flow. Second operand 5 states and 3189 transitions. [2023-08-24 13:56:09,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 559 flow [2023-08-24 13:56:09,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 111 transitions, 550 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 13:56:09,221 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 232 flow [2023-08-24 13:56:09,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2023-08-24 13:56:09,222 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2023-08-24 13:56:09,222 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 232 flow [2023-08-24 13:56:09,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:09,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:09,224 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:09,230 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 13:56:09,430 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 13:56:09,430 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 13:56:09,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1411267767, now seen corresponding path program 4 times [2023-08-24 13:56:09,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:09,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620058690] [2023-08-24 13:56:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:09,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:56:09,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:09,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620058690] [2023-08-24 13:56:09,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620058690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:56:09,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192840276] [2023-08-24 13:56:09,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:56:09,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:56:09,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:56:09,616 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 13:56:09,618 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 13:56:09,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:56:09,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:56:09,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 13:56:09,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:56:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:56:09,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:56:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:56:09,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192840276] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:56:09,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:56:09,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-24 13:56:09,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935787383] [2023-08-24 13:56:09,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:56:09,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 13:56:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:09,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 13:56:09,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-24 13:56:09,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 643 out of 1615 [2023-08-24 13:56:09,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 232 flow. Second operand has 17 states, 17 states have (on average 645.1764705882352) internal successors, (10968), 17 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:09,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:09,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 643 of 1615 [2023-08-24 13:56:09,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:10,802 INFO L124 PetriNetUnfolderBase]: 3223/4452 cut-off events. [2023-08-24 13:56:10,802 INFO L125 PetriNetUnfolderBase]: For 1844/1844 co-relation queries the response was YES. [2023-08-24 13:56:10,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10113 conditions, 4452 events. 3223/4452 cut-off events. For 1844/1844 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17872 event pairs, 2136 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 10079. Up to 4438 conditions per place. [2023-08-24 13:56:10,823 INFO L140 encePairwiseOnDemand]: 1608/1615 looper letters, 47 selfloop transitions, 18 changer transitions 0/65 dead transitions. [2023-08-24 13:56:10,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 380 flow [2023-08-24 13:56:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:56:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:56:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4567 transitions. [2023-08-24 13:56:10,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039805395842547 [2023-08-24 13:56:10,835 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4567 transitions. [2023-08-24 13:56:10,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4567 transitions. [2023-08-24 13:56:10,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:10,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4567 transitions. [2023-08-24 13:56:10,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 652.4285714285714) internal successors, (4567), 7 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:10,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1615.0) internal successors, (12920), 8 states have internal predecessors, (12920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:10,859 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1615.0) internal successors, (12920), 8 states have internal predecessors, (12920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:10,859 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 232 flow. Second operand 7 states and 4567 transitions. [2023-08-24 13:56:10,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 380 flow [2023-08-24 13:56:10,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 374 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-24 13:56:10,865 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 294 flow [2023-08-24 13:56:10,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2023-08-24 13:56:10,868 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-08-24 13:56:10,868 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 294 flow [2023-08-24 13:56:10,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 645.1764705882352) internal successors, (10968), 17 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:10,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:10,871 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:10,881 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 13:56:11,081 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 13:56:11,081 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 13:56:11,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash 520294367, now seen corresponding path program 5 times [2023-08-24 13:56:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:11,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53525495] [2023-08-24 13:56:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:11,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:12,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:12,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53525495] [2023-08-24 13:56:12,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53525495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:12,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:12,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:56:12,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489396926] [2023-08-24 13:56:12,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:56:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:12,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:56:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:56:12,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 618 out of 1615 [2023-08-24 13:56:12,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:12,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:12,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 618 of 1615 [2023-08-24 13:56:12,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:14,071 INFO L124 PetriNetUnfolderBase]: 7719/10587 cut-off events. [2023-08-24 13:56:14,072 INFO L125 PetriNetUnfolderBase]: For 1820/1820 co-relation queries the response was YES. [2023-08-24 13:56:14,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22754 conditions, 10587 events. 7719/10587 cut-off events. For 1820/1820 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 51679 event pairs, 1252 based on Foata normal form. 1/8396 useless extension candidates. Maximal degree in co-relation 22641. Up to 3811 conditions per place. [2023-08-24 13:56:14,112 INFO L140 encePairwiseOnDemand]: 1602/1615 looper letters, 160 selfloop transitions, 42 changer transitions 1/203 dead transitions. [2023-08-24 13:56:14,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 203 transitions, 1044 flow [2023-08-24 13:56:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:56:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:56:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4510 transitions. [2023-08-24 13:56:14,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39893852277753206 [2023-08-24 13:56:14,125 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4510 transitions. [2023-08-24 13:56:14,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4510 transitions. [2023-08-24 13:56:14,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:14,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4510 transitions. [2023-08-24 13:56:14,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 644.2857142857143) internal successors, (4510), 7 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:14,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1615.0) internal successors, (12920), 8 states have internal predecessors, (12920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:14,152 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1615.0) internal successors, (12920), 8 states have internal predecessors, (12920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:14,152 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 294 flow. Second operand 7 states and 4510 transitions. [2023-08-24 13:56:14,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 203 transitions, 1044 flow [2023-08-24 13:56:14,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 203 transitions, 1008 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-24 13:56:14,163 INFO L231 Difference]: Finished difference. Result has 71 places, 108 transitions, 585 flow [2023-08-24 13:56:14,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=585, PETRI_PLACES=71, PETRI_TRANSITIONS=108} [2023-08-24 13:56:14,164 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-08-24 13:56:14,164 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 108 transitions, 585 flow [2023-08-24 13:56:14,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:14,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:14,165 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:14,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 13:56:14,166 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 13:56:14,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:14,166 INFO L85 PathProgramCache]: Analyzing trace with hash -95749075, now seen corresponding path program 6 times [2023-08-24 13:56:14,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:14,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451896725] [2023-08-24 13:56:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:15,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:15,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451896725] [2023-08-24 13:56:15,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451896725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:15,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:15,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:56:15,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725095890] [2023-08-24 13:56:15,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:15,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:56:15,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:15,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:56:15,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:56:15,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 618 out of 1615 [2023-08-24 13:56:15,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 108 transitions, 585 flow. Second operand has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:15,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:15,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 618 of 1615 [2023-08-24 13:56:15,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:17,492 INFO L124 PetriNetUnfolderBase]: 9993/13696 cut-off events. [2023-08-24 13:56:17,492 INFO L125 PetriNetUnfolderBase]: For 9819/9819 co-relation queries the response was YES. [2023-08-24 13:56:17,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38915 conditions, 13696 events. 9993/13696 cut-off events. For 9819/9819 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68208 event pairs, 2739 based on Foata normal form. 1/11107 useless extension candidates. Maximal degree in co-relation 38815. Up to 7378 conditions per place. [2023-08-24 13:56:17,559 INFO L140 encePairwiseOnDemand]: 1602/1615 looper letters, 153 selfloop transitions, 47 changer transitions 2/202 dead transitions. [2023-08-24 13:56:17,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 202 transitions, 1379 flow [2023-08-24 13:56:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:56:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:56:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3206 transitions. [2023-08-24 13:56:17,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39702786377708976 [2023-08-24 13:56:17,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3206 transitions. [2023-08-24 13:56:17,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3206 transitions. [2023-08-24 13:56:17,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:17,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3206 transitions. [2023-08-24 13:56:17,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 641.2) internal successors, (3206), 5 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:17,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:17,583 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:17,583 INFO L175 Difference]: Start difference. First operand has 71 places, 108 transitions, 585 flow. Second operand 5 states and 3206 transitions. [2023-08-24 13:56:17,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 202 transitions, 1379 flow [2023-08-24 13:56:17,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 202 transitions, 1371 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-24 13:56:17,683 INFO L231 Difference]: Finished difference. Result has 79 places, 145 transitions, 1037 flow [2023-08-24 13:56:17,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1037, PETRI_PLACES=79, PETRI_TRANSITIONS=145} [2023-08-24 13:56:17,684 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-08-24 13:56:17,684 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 145 transitions, 1037 flow [2023-08-24 13:56:17,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:17,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:17,685 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:17,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 13:56:17,685 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 13:56:17,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:17,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1665942313, now seen corresponding path program 7 times [2023-08-24 13:56:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:17,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186062692] [2023-08-24 13:56:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:18,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:18,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186062692] [2023-08-24 13:56:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186062692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:18,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:18,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:56:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605649901] [2023-08-24 13:56:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:56:18,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:56:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:56:18,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 618 out of 1615 [2023-08-24 13:56:18,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 145 transitions, 1037 flow. Second operand has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:18,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:18,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 618 of 1615 [2023-08-24 13:56:18,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:21,154 INFO L124 PetriNetUnfolderBase]: 10430/14355 cut-off events. [2023-08-24 13:56:21,154 INFO L125 PetriNetUnfolderBase]: For 19029/19029 co-relation queries the response was YES. [2023-08-24 13:56:21,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45402 conditions, 14355 events. 10430/14355 cut-off events. For 19029/19029 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 72739 event pairs, 4617 based on Foata normal form. 1/11640 useless extension candidates. Maximal degree in co-relation 45298. Up to 11796 conditions per place. [2023-08-24 13:56:21,232 INFO L140 encePairwiseOnDemand]: 1603/1615 looper letters, 203 selfloop transitions, 42 changer transitions 2/247 dead transitions. [2023-08-24 13:56:21,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 247 transitions, 2060 flow [2023-08-24 13:56:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:56:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:56:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3218 transitions. [2023-08-24 13:56:21,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985139318885449 [2023-08-24 13:56:21,240 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3218 transitions. [2023-08-24 13:56:21,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3218 transitions. [2023-08-24 13:56:21,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:21,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3218 transitions. [2023-08-24 13:56:21,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 643.6) internal successors, (3218), 5 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:21,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:21,257 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:21,257 INFO L175 Difference]: Start difference. First operand has 79 places, 145 transitions, 1037 flow. Second operand 5 states and 3218 transitions. [2023-08-24 13:56:21,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 247 transitions, 2060 flow [2023-08-24 13:56:21,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 247 transitions, 2048 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-24 13:56:21,502 INFO L231 Difference]: Finished difference. Result has 86 places, 171 transitions, 1450 flow [2023-08-24 13:56:21,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1450, PETRI_PLACES=86, PETRI_TRANSITIONS=171} [2023-08-24 13:56:21,504 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2023-08-24 13:56:21,504 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 171 transitions, 1450 flow [2023-08-24 13:56:21,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:21,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:21,505 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:21,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 13:56:21,506 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 13:56:21,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash 249887811, now seen corresponding path program 8 times [2023-08-24 13:56:21,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:21,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831101979] [2023-08-24 13:56:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:21,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:22,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:22,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831101979] [2023-08-24 13:56:22,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831101979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:22,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:22,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:56:22,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825557730] [2023-08-24 13:56:22,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:22,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:56:22,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:22,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:56:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:56:22,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 618 out of 1615 [2023-08-24 13:56:22,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 171 transitions, 1450 flow. Second operand has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:22,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:22,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 618 of 1615 [2023-08-24 13:56:22,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:24,889 INFO L124 PetriNetUnfolderBase]: 10583/14586 cut-off events. [2023-08-24 13:56:24,889 INFO L125 PetriNetUnfolderBase]: For 26990/26990 co-relation queries the response was YES. [2023-08-24 13:56:24,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50376 conditions, 14586 events. 10583/14586 cut-off events. For 26990/26990 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 75180 event pairs, 2593 based on Foata normal form. 1/11817 useless extension candidates. Maximal degree in co-relation 50268. Up to 7426 conditions per place. [2023-08-24 13:56:24,982 INFO L140 encePairwiseOnDemand]: 1604/1615 looper letters, 191 selfloop transitions, 48 changer transitions 2/241 dead transitions. [2023-08-24 13:56:24,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 241 transitions, 2263 flow [2023-08-24 13:56:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:56:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:56:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3212 transitions. [2023-08-24 13:56:24,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977708978328173 [2023-08-24 13:56:24,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3212 transitions. [2023-08-24 13:56:24,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3212 transitions. [2023-08-24 13:56:24,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:24,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3212 transitions. [2023-08-24 13:56:24,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 642.4) internal successors, (3212), 5 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:25,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:25,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:25,006 INFO L175 Difference]: Start difference. First operand has 86 places, 171 transitions, 1450 flow. Second operand 5 states and 3212 transitions. [2023-08-24 13:56:25,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 241 transitions, 2263 flow [2023-08-24 13:56:25,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 241 transitions, 2255 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-24 13:56:25,257 INFO L231 Difference]: Finished difference. Result has 92 places, 180 transitions, 1688 flow [2023-08-24 13:56:25,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1688, PETRI_PLACES=92, PETRI_TRANSITIONS=180} [2023-08-24 13:56:25,258 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2023-08-24 13:56:25,258 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 180 transitions, 1688 flow [2023-08-24 13:56:25,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 622.4) internal successors, (3112), 5 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:25,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:25,259 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:25,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 13:56:25,260 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 13:56:25,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1141453108, now seen corresponding path program 1 times [2023-08-24 13:56:25,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:25,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406333479] [2023-08-24 13:56:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:25,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:25,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406333479] [2023-08-24 13:56:25,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406333479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:25,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:25,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:56:25,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235333084] [2023-08-24 13:56:25,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:25,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:56:25,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:56:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:56:25,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 647 out of 1615 [2023-08-24 13:56:25,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 180 transitions, 1688 flow. Second operand has 3 states, 3 states have (on average 654.6666666666666) internal successors, (1964), 3 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:25,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:25,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 647 of 1615 [2023-08-24 13:56:25,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:28,409 INFO L124 PetriNetUnfolderBase]: 14068/19232 cut-off events. [2023-08-24 13:56:28,409 INFO L125 PetriNetUnfolderBase]: For 45631/45631 co-relation queries the response was YES. [2023-08-24 13:56:28,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69681 conditions, 19232 events. 14068/19232 cut-off events. For 45631/45631 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 96330 event pairs, 5187 based on Foata normal form. 0/15538 useless extension candidates. Maximal degree in co-relation 69570. Up to 14679 conditions per place. [2023-08-24 13:56:28,492 INFO L140 encePairwiseOnDemand]: 1612/1615 looper letters, 229 selfloop transitions, 8 changer transitions 0/237 dead transitions. [2023-08-24 13:56:28,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 237 transitions, 2554 flow [2023-08-24 13:56:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:56:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:56:28,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2017 transitions. [2023-08-24 13:56:28,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41630546955624353 [2023-08-24 13:56:28,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2017 transitions. [2023-08-24 13:56:28,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2017 transitions. [2023-08-24 13:56:28,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:28,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2017 transitions. [2023-08-24 13:56:28,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 672.3333333333334) internal successors, (2017), 3 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:28,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1615.0) internal successors, (6460), 4 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:28,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1615.0) internal successors, (6460), 4 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:28,503 INFO L175 Difference]: Start difference. First operand has 92 places, 180 transitions, 1688 flow. Second operand 3 states and 2017 transitions. [2023-08-24 13:56:28,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 237 transitions, 2554 flow [2023-08-24 13:56:28,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 237 transitions, 2489 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-24 13:56:28,781 INFO L231 Difference]: Finished difference. Result has 94 places, 181 transitions, 1657 flow [2023-08-24 13:56:28,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1627, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1657, PETRI_PLACES=94, PETRI_TRANSITIONS=181} [2023-08-24 13:56:28,782 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2023-08-24 13:56:28,782 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 181 transitions, 1657 flow [2023-08-24 13:56:28,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 654.6666666666666) internal successors, (1964), 3 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:28,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:28,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:28,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 13:56:28,783 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 13:56:28,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash -350585290, now seen corresponding path program 1 times [2023-08-24 13:56:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:28,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77699334] [2023-08-24 13:56:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:28,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:28,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:28,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77699334] [2023-08-24 13:56:28,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77699334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:28,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:28,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:56:28,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817010754] [2023-08-24 13:56:28,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:28,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:56:28,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:56:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:56:28,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 647 out of 1615 [2023-08-24 13:56:28,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 181 transitions, 1657 flow. Second operand has 3 states, 3 states have (on average 654.6666666666666) internal successors, (1964), 3 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:28,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:28,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 647 of 1615 [2023-08-24 13:56:28,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:32,744 INFO L124 PetriNetUnfolderBase]: 20216/27616 cut-off events. [2023-08-24 13:56:32,744 INFO L125 PetriNetUnfolderBase]: For 56814/56814 co-relation queries the response was YES. [2023-08-24 13:56:32,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95502 conditions, 27616 events. 20216/27616 cut-off events. For 56814/56814 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 144045 event pairs, 7771 based on Foata normal form. 352/23016 useless extension candidates. Maximal degree in co-relation 95390. Up to 18743 conditions per place. [2023-08-24 13:56:32,934 INFO L140 encePairwiseOnDemand]: 1610/1615 looper letters, 226 selfloop transitions, 12 changer transitions 0/238 dead transitions. [2023-08-24 13:56:32,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 238 transitions, 2551 flow [2023-08-24 13:56:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:56:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:56:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2019 transitions. [2023-08-24 13:56:32,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41671826625387 [2023-08-24 13:56:32,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2019 transitions. [2023-08-24 13:56:32,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2019 transitions. [2023-08-24 13:56:32,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:32,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2019 transitions. [2023-08-24 13:56:32,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 673.0) internal successors, (2019), 3 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:32,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1615.0) internal successors, (6460), 4 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:32,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1615.0) internal successors, (6460), 4 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:32,946 INFO L175 Difference]: Start difference. First operand has 94 places, 181 transitions, 1657 flow. Second operand 3 states and 2019 transitions. [2023-08-24 13:56:32,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 238 transitions, 2551 flow [2023-08-24 13:56:33,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 238 transitions, 2536 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:56:33,519 INFO L231 Difference]: Finished difference. Result has 96 places, 172 transitions, 1568 flow [2023-08-24 13:56:33,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1568, PETRI_PLACES=96, PETRI_TRANSITIONS=172} [2023-08-24 13:56:33,520 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2023-08-24 13:56:33,520 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 172 transitions, 1568 flow [2023-08-24 13:56:33,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 654.6666666666666) internal successors, (1964), 3 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:33,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:33,521 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:33,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 13:56:33,521 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 13:56:33,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1759787863, now seen corresponding path program 1 times [2023-08-24 13:56:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:33,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280694020] [2023-08-24 13:56:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:33,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:33,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:33,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280694020] [2023-08-24 13:56:33,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280694020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:33,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:33,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:56:33,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826003438] [2023-08-24 13:56:33,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:33,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:56:33,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:33,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:56:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:56:33,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 647 out of 1615 [2023-08-24 13:56:33,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 172 transitions, 1568 flow. Second operand has 3 states, 3 states have (on average 654.6666666666666) internal successors, (1964), 3 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:33,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:33,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 647 of 1615 [2023-08-24 13:56:33,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:38,705 INFO L124 PetriNetUnfolderBase]: 21820/30066 cut-off events. [2023-08-24 13:56:38,706 INFO L125 PetriNetUnfolderBase]: For 66590/66590 co-relation queries the response was YES. [2023-08-24 13:56:38,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105953 conditions, 30066 events. 21820/30066 cut-off events. For 66590/66590 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 163231 event pairs, 9501 based on Foata normal form. 0/25586 useless extension candidates. Maximal degree in co-relation 105840. Up to 24803 conditions per place. [2023-08-24 13:56:38,871 INFO L140 encePairwiseOnDemand]: 1612/1615 looper letters, 189 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2023-08-24 13:56:38,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 208 transitions, 2172 flow [2023-08-24 13:56:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:56:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:56:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2021 transitions. [2023-08-24 13:56:38,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171310629514964 [2023-08-24 13:56:38,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2021 transitions. [2023-08-24 13:56:38,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2021 transitions. [2023-08-24 13:56:38,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:38,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2021 transitions. [2023-08-24 13:56:38,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 673.6666666666666) internal successors, (2021), 3 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:38,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1615.0) internal successors, (6460), 4 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:38,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1615.0) internal successors, (6460), 4 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:38,880 INFO L175 Difference]: Start difference. First operand has 96 places, 172 transitions, 1568 flow. Second operand 3 states and 2021 transitions. [2023-08-24 13:56:38,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 208 transitions, 2172 flow [2023-08-24 13:56:39,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 208 transitions, 2157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:56:39,313 INFO L231 Difference]: Finished difference. Result has 98 places, 165 transitions, 1536 flow [2023-08-24 13:56:39,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1536, PETRI_PLACES=98, PETRI_TRANSITIONS=165} [2023-08-24 13:56:39,314 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2023-08-24 13:56:39,314 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 165 transitions, 1536 flow [2023-08-24 13:56:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 654.6666666666666) internal successors, (1964), 3 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:39,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:39,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:39,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 13:56:39,315 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 13:56:39,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:39,315 INFO L85 PathProgramCache]: Analyzing trace with hash 57120697, now seen corresponding path program 1 times [2023-08-24 13:56:39,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:39,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846657572] [2023-08-24 13:56:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:39,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846657572] [2023-08-24 13:56:39,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846657572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:56:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596277162] [2023-08-24 13:56:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:39,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:56:39,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:56:39,610 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 13:56:39,617 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 13:56:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:39,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 13:56:39,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:56:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:39,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:56:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:40,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596277162] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:56:40,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:56:40,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 13:56:40,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028865413] [2023-08-24 13:56:40,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:56:40,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:56:40,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:40,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:56:40,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:56:40,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 653 out of 1615 [2023-08-24 13:56:40,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 165 transitions, 1536 flow. Second operand has 6 states, 6 states have (on average 660.0) internal successors, (3960), 6 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:40,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:40,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 653 of 1615 [2023-08-24 13:56:40,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:45,142 INFO L124 PetriNetUnfolderBase]: 22366/30912 cut-off events. [2023-08-24 13:56:45,142 INFO L125 PetriNetUnfolderBase]: For 88638/88638 co-relation queries the response was YES. [2023-08-24 13:56:45,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113762 conditions, 30912 events. 22366/30912 cut-off events. For 88638/88638 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 170808 event pairs, 6289 based on Foata normal form. 4/26240 useless extension candidates. Maximal degree in co-relation 113648. Up to 28010 conditions per place. [2023-08-24 13:56:45,343 INFO L140 encePairwiseOnDemand]: 1611/1615 looper letters, 178 selfloop transitions, 12 changer transitions 54/244 dead transitions. [2023-08-24 13:56:45,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 244 transitions, 2587 flow [2023-08-24 13:56:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:56:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:56:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2710 transitions. [2023-08-24 13:56:45,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195046439628483 [2023-08-24 13:56:45,347 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2710 transitions. [2023-08-24 13:56:45,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2710 transitions. [2023-08-24 13:56:45,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:45,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2710 transitions. [2023-08-24 13:56:45,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 677.5) internal successors, (2710), 4 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:45,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:45,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:45,354 INFO L175 Difference]: Start difference. First operand has 98 places, 165 transitions, 1536 flow. Second operand 4 states and 2710 transitions. [2023-08-24 13:56:45,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 244 transitions, 2587 flow [2023-08-24 13:56:45,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 244 transitions, 2546 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-24 13:56:45,784 INFO L231 Difference]: Finished difference. Result has 103 places, 155 transitions, 1465 flow [2023-08-24 13:56:45,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1465, PETRI_PLACES=103, PETRI_TRANSITIONS=155} [2023-08-24 13:56:45,784 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2023-08-24 13:56:45,784 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 155 transitions, 1465 flow [2023-08-24 13:56:45,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 660.0) internal successors, (3960), 6 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:45,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:45,785 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:45,791 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 13:56:45,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 13:56:45,991 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 13:56:45,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash -52529297, now seen corresponding path program 2 times [2023-08-24 13:56:45,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:45,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027420713] [2023-08-24 13:56:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:56:46,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:46,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027420713] [2023-08-24 13:56:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027420713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:46,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:46,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:56:46,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325487732] [2023-08-24 13:56:46,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:56:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:56:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:56:46,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 653 out of 1615 [2023-08-24 13:56:46,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 155 transitions, 1465 flow. Second operand has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:46,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:46,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 653 of 1615 [2023-08-24 13:56:46,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:51,077 INFO L124 PetriNetUnfolderBase]: 21292/29324 cut-off events. [2023-08-24 13:56:51,077 INFO L125 PetriNetUnfolderBase]: For 77811/77811 co-relation queries the response was YES. [2023-08-24 13:56:51,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105172 conditions, 29324 events. 21292/29324 cut-off events. For 77811/77811 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 158037 event pairs, 11165 based on Foata normal form. 4/24892 useless extension candidates. Maximal degree in co-relation 105090. Up to 26876 conditions per place. [2023-08-24 13:56:51,286 INFO L140 encePairwiseOnDemand]: 1612/1615 looper letters, 158 selfloop transitions, 5 changer transitions 50/213 dead transitions. [2023-08-24 13:56:51,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 213 transitions, 2203 flow [2023-08-24 13:56:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:56:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:56:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2708 transitions. [2023-08-24 13:56:51,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919504643962846 [2023-08-24 13:56:51,290 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2708 transitions. [2023-08-24 13:56:51,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2708 transitions. [2023-08-24 13:56:51,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:51,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2708 transitions. [2023-08-24 13:56:51,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 677.0) internal successors, (2708), 4 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:51,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:51,298 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:51,298 INFO L175 Difference]: Start difference. First operand has 103 places, 155 transitions, 1465 flow. Second operand 4 states and 2708 transitions. [2023-08-24 13:56:51,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 213 transitions, 2203 flow [2023-08-24 13:56:51,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 213 transitions, 2166 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-24 13:56:51,742 INFO L231 Difference]: Finished difference. Result has 105 places, 135 transitions, 1186 flow [2023-08-24 13:56:51,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1186, PETRI_PLACES=105, PETRI_TRANSITIONS=135} [2023-08-24 13:56:51,742 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2023-08-24 13:56:51,742 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 135 transitions, 1186 flow [2023-08-24 13:56:51,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:51,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:51,743 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 13:56:51,743 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 13:56:51,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash 587704541, now seen corresponding path program 1 times [2023-08-24 13:56:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:51,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722076481] [2023-08-24 13:56:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:56:52,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:52,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722076481] [2023-08-24 13:56:52,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722076481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:52,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:52,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:56:52,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673964156] [2023-08-24 13:56:52,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:52,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:56:52,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:52,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:56:52,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:56:52,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 653 out of 1615 [2023-08-24 13:56:52,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 135 transitions, 1186 flow. Second operand has 4 states, 4 states have (on average 660.25) internal successors, (2641), 4 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:52,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:52,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 653 of 1615 [2023-08-24 13:56:52,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:56,543 INFO L124 PetriNetUnfolderBase]: 20390/28020 cut-off events. [2023-08-24 13:56:56,543 INFO L125 PetriNetUnfolderBase]: For 69320/69320 co-relation queries the response was YES. [2023-08-24 13:56:56,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98201 conditions, 28020 events. 20390/28020 cut-off events. For 69320/69320 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 148877 event pairs, 7588 based on Foata normal form. 2/23794 useless extension candidates. Maximal degree in co-relation 98122. Up to 27320 conditions per place. [2023-08-24 13:56:56,760 INFO L140 encePairwiseOnDemand]: 1611/1615 looper letters, 132 selfloop transitions, 15 changer transitions 38/185 dead transitions. [2023-08-24 13:56:56,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 185 transitions, 1900 flow [2023-08-24 13:56:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:56:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:56:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2699 transitions. [2023-08-24 13:56:56,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178018575851393 [2023-08-24 13:56:56,764 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2699 transitions. [2023-08-24 13:56:56,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2699 transitions. [2023-08-24 13:56:56,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:56:56,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2699 transitions. [2023-08-24 13:56:56,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 674.75) internal successors, (2699), 4 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:56,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:56,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:56,772 INFO L175 Difference]: Start difference. First operand has 105 places, 135 transitions, 1186 flow. Second operand 4 states and 2699 transitions. [2023-08-24 13:56:56,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 185 transitions, 1900 flow [2023-08-24 13:56:57,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 185 transitions, 1845 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-24 13:56:57,192 INFO L231 Difference]: Finished difference. Result has 103 places, 135 transitions, 1227 flow [2023-08-24 13:56:57,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1227, PETRI_PLACES=103, PETRI_TRANSITIONS=135} [2023-08-24 13:56:57,193 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2023-08-24 13:56:57,193 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 135 transitions, 1227 flow [2023-08-24 13:56:57,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 660.25) internal successors, (2641), 4 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:57,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:57,194 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:57,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 13:56:57,194 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 13:56:57,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1704519993, now seen corresponding path program 2 times [2023-08-24 13:56:57,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:57,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738945795] [2023-08-24 13:56:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:57,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:56:57,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:57,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738945795] [2023-08-24 13:56:57,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738945795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:56:57,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:56:57,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:56:57,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310720089] [2023-08-24 13:56:57,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:56:57,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:56:57,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:56:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:56:57,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 653 out of 1615 [2023-08-24 13:56:57,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 1227 flow. Second operand has 4 states, 4 states have (on average 660.25) internal successors, (2641), 4 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:57,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:57,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 653 of 1615 [2023-08-24 13:56:57,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:57:01,912 INFO L124 PetriNetUnfolderBase]: 20020/27415 cut-off events. [2023-08-24 13:57:01,912 INFO L125 PetriNetUnfolderBase]: For 58517/58517 co-relation queries the response was YES. [2023-08-24 13:57:02,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93365 conditions, 27415 events. 20020/27415 cut-off events. For 58517/58517 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 144082 event pairs, 10933 based on Foata normal form. 2/23231 useless extension candidates. Maximal degree in co-relation 93297. Up to 26876 conditions per place. [2023-08-24 13:57:02,084 INFO L140 encePairwiseOnDemand]: 1612/1615 looper letters, 125 selfloop transitions, 0 changer transitions 42/167 dead transitions. [2023-08-24 13:57:02,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 167 transitions, 1682 flow [2023-08-24 13:57:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:57:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:57:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2690 transitions. [2023-08-24 13:57:02,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41640866873065013 [2023-08-24 13:57:02,088 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2690 transitions. [2023-08-24 13:57:02,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2690 transitions. [2023-08-24 13:57:02,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:57:02,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2690 transitions. [2023-08-24 13:57:02,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 672.5) internal successors, (2690), 4 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:02,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:02,093 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1615.0) internal successors, (8075), 5 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:02,093 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 1227 flow. Second operand 4 states and 2690 transitions. [2023-08-24 13:57:02,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 167 transitions, 1682 flow [2023-08-24 13:57:02,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 167 transitions, 1613 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-24 13:57:02,381 INFO L231 Difference]: Finished difference. Result has 96 places, 125 transitions, 1006 flow [2023-08-24 13:57:02,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1006, PETRI_PLACES=96, PETRI_TRANSITIONS=125} [2023-08-24 13:57:02,381 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2023-08-24 13:57:02,381 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 125 transitions, 1006 flow [2023-08-24 13:57:02,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 660.25) internal successors, (2641), 4 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:02,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:57:02,382 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:57:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 13:57:02,382 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 13:57:02,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:57:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash 406176049, now seen corresponding path program 1 times [2023-08-24 13:57:02,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:57:02,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141345619] [2023-08-24 13:57:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:57:02,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:57:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:57:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:57:03,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:57:03,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141345619] [2023-08-24 13:57:03,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141345619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:57:03,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704883634] [2023-08-24 13:57:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:57:03,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:57:03,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:57:03,089 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 13:57:03,091 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 13:57:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:57:03,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 13:57:03,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:57:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:57:03,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:57:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:57:04,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704883634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:57:04,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:57:04,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-24 13:57:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32760440] [2023-08-24 13:57:04,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:57:04,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 13:57:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:57:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 13:57:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-24 13:57:04,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1615 [2023-08-24 13:57:04,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 125 transitions, 1006 flow. Second operand has 8 states, 8 states have (on average 641.625) internal successors, (5133), 8 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:04,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:57:04,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1615 [2023-08-24 13:57:04,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:57:10,557 INFO L124 PetriNetUnfolderBase]: 28249/38671 cut-off events. [2023-08-24 13:57:10,558 INFO L125 PetriNetUnfolderBase]: For 64119/64119 co-relation queries the response was YES. [2023-08-24 13:57:10,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126592 conditions, 38671 events. 28249/38671 cut-off events. For 64119/64119 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 215378 event pairs, 4484 based on Foata normal form. 31/32260 useless extension candidates. Maximal degree in co-relation 126563. Up to 23290 conditions per place. [2023-08-24 13:57:10,833 INFO L140 encePairwiseOnDemand]: 1605/1615 looper letters, 209 selfloop transitions, 63 changer transitions 20/292 dead transitions. [2023-08-24 13:57:10,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 292 transitions, 2389 flow [2023-08-24 13:57:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:57:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:57:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 5257 transitions. [2023-08-24 13:57:10,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068885448916409 [2023-08-24 13:57:10,839 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 5257 transitions. [2023-08-24 13:57:10,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 5257 transitions. [2023-08-24 13:57:10,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:57:10,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 5257 transitions. [2023-08-24 13:57:10,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 657.125) internal successors, (5257), 8 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:10,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1615.0) internal successors, (14535), 9 states have internal predecessors, (14535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:10,852 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1615.0) internal successors, (14535), 9 states have internal predecessors, (14535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:10,852 INFO L175 Difference]: Start difference. First operand has 96 places, 125 transitions, 1006 flow. Second operand 8 states and 5257 transitions. [2023-08-24 13:57:10,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 292 transitions, 2389 flow [2023-08-24 13:57:11,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 292 transitions, 2229 flow, removed 49 selfloop flow, removed 8 redundant places. [2023-08-24 13:57:11,194 INFO L231 Difference]: Finished difference. Result has 92 places, 158 transitions, 1465 flow [2023-08-24 13:57:11,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1465, PETRI_PLACES=92, PETRI_TRANSITIONS=158} [2023-08-24 13:57:11,195 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2023-08-24 13:57:11,195 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 158 transitions, 1465 flow [2023-08-24 13:57:11,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 641.625) internal successors, (5133), 8 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:11,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:57:11,196 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:57:11,203 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 13:57:11,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 13:57:11,402 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 13:57:11,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:57:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash 424435569, now seen corresponding path program 2 times [2023-08-24 13:57:11,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:57:11,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594163324] [2023-08-24 13:57:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:57:11,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:57:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:57:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:57:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:57:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594163324] [2023-08-24 13:57:11,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594163324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:57:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961696137] [2023-08-24 13:57:11,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:57:11,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:57:11,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:57:11,973 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 13:57:11,976 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 13:57:12,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:57:12,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:57:12,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 13:57:12,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:57:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:57:12,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:57:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:57:13,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961696137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:57:13,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:57:13,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-24 13:57:13,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463000356] [2023-08-24 13:57:13,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:57:13,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 13:57:13,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:57:13,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 13:57:13,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-24 13:57:13,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1615 [2023-08-24 13:57:13,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 158 transitions, 1465 flow. Second operand has 8 states, 8 states have (on average 641.25) internal successors, (5130), 8 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:13,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:57:13,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1615 [2023-08-24 13:57:13,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:57:20,923 INFO L124 PetriNetUnfolderBase]: 35834/49160 cut-off events. [2023-08-24 13:57:20,924 INFO L125 PetriNetUnfolderBase]: For 95081/95081 co-relation queries the response was YES. [2023-08-24 13:57:21,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160506 conditions, 49160 events. 35834/49160 cut-off events. For 95081/95081 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 284883 event pairs, 3744 based on Foata normal form. 29/40561 useless extension candidates. Maximal degree in co-relation 160477. Up to 26997 conditions per place. [2023-08-24 13:57:21,310 INFO L140 encePairwiseOnDemand]: 1607/1615 looper letters, 256 selfloop transitions, 56 changer transitions 19/331 dead transitions. [2023-08-24 13:57:21,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 331 transitions, 2955 flow [2023-08-24 13:57:21,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:57:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:57:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 5267 transitions. [2023-08-24 13:57:21,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076625386996904 [2023-08-24 13:57:21,316 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 5267 transitions. [2023-08-24 13:57:21,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 5267 transitions. [2023-08-24 13:57:21,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:57:21,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 5267 transitions. [2023-08-24 13:57:21,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 658.375) internal successors, (5267), 8 states have internal predecessors, (5267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:21,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1615.0) internal successors, (14535), 9 states have internal predecessors, (14535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:21,330 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1615.0) internal successors, (14535), 9 states have internal predecessors, (14535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:21,330 INFO L175 Difference]: Start difference. First operand has 92 places, 158 transitions, 1465 flow. Second operand 8 states and 5267 transitions. [2023-08-24 13:57:21,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 331 transitions, 2955 flow [2023-08-24 13:57:21,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 331 transitions, 2933 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-24 13:57:21,651 INFO L231 Difference]: Finished difference. Result has 101 places, 177 transitions, 1807 flow [2023-08-24 13:57:21,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1807, PETRI_PLACES=101, PETRI_TRANSITIONS=177} [2023-08-24 13:57:21,652 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 55 predicate places. [2023-08-24 13:57:21,652 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 177 transitions, 1807 flow [2023-08-24 13:57:21,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 641.25) internal successors, (5130), 8 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:21,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:57:21,652 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:57:21,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 13:57:21,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:57:21,853 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 13:57:21,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:57:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash -268312789, now seen corresponding path program 3 times [2023-08-24 13:57:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:57:21,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187250871] [2023-08-24 13:57:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:57:21,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:57:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:57:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:57:22,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:57:22,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187250871] [2023-08-24 13:57:22,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187250871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:57:22,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:57:22,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:57:22,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216916675] [2023-08-24 13:57:22,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:57:22,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:57:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:57:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:57:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:57:22,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 637 out of 1615 [2023-08-24 13:57:22,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 177 transitions, 1807 flow. Second operand has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:22,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:57:22,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 637 of 1615 [2023-08-24 13:57:22,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:57:30,374 INFO L124 PetriNetUnfolderBase]: 35744/49010 cut-off events. [2023-08-24 13:57:30,374 INFO L125 PetriNetUnfolderBase]: For 138358/138358 co-relation queries the response was YES. [2023-08-24 13:57:30,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181149 conditions, 49010 events. 35744/49010 cut-off events. For 138358/138358 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 282267 event pairs, 18599 based on Foata normal form. 1/40391 useless extension candidates. Maximal degree in co-relation 181116. Up to 47018 conditions per place. [2023-08-24 13:57:30,776 INFO L140 encePairwiseOnDemand]: 1611/1615 looper letters, 217 selfloop transitions, 13 changer transitions 18/248 dead transitions. [2023-08-24 13:57:30,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 248 transitions, 2584 flow [2023-08-24 13:57:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:57:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:57:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3296 transitions. [2023-08-24 13:57:30,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40817337461300307 [2023-08-24 13:57:30,782 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3296 transitions. [2023-08-24 13:57:30,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3296 transitions. [2023-08-24 13:57:30,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:57:30,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3296 transitions. [2023-08-24 13:57:30,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 659.2) internal successors, (3296), 5 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:30,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:30,791 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1615.0) internal successors, (9690), 6 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:30,791 INFO L175 Difference]: Start difference. First operand has 101 places, 177 transitions, 1807 flow. Second operand 5 states and 3296 transitions. [2023-08-24 13:57:30,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 248 transitions, 2584 flow [2023-08-24 13:57:31,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 248 transitions, 2564 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-24 13:57:31,108 INFO L231 Difference]: Finished difference. Result has 104 places, 176 transitions, 1805 flow [2023-08-24 13:57:31,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1805, PETRI_PLACES=104, PETRI_TRANSITIONS=176} [2023-08-24 13:57:31,109 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 58 predicate places. [2023-08-24 13:57:31,109 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 176 transitions, 1805 flow [2023-08-24 13:57:31,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 643.0) internal successors, (3215), 5 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:31,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:57:31,110 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:57:31,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 13:57:31,110 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 13:57:31,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:57:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1786585963, now seen corresponding path program 4 times [2023-08-24 13:57:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:57:31,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570538219] [2023-08-24 13:57:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:57:31,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:57:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:57:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:57:32,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:57:32,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570538219] [2023-08-24 13:57:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570538219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:57:32,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024077075] [2023-08-24 13:57:32,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:57:32,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:57:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:57:32,511 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 13:57:32,515 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 13:57:32,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:57:32,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:57:32,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 13:57:32,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:57:33,258 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:57:33,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2023-08-24 13:57:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:57:33,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:57:34,408 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:57:34,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2023-08-24 13:57:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:57:34,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024077075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:57:34,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:57:34,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-24 13:57:34,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865970623] [2023-08-24 13:57:34,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:57:34,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 13:57:34,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:57:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 13:57:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2023-08-24 13:57:34,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 594 out of 1615 [2023-08-24 13:57:34,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 176 transitions, 1805 flow. Second operand has 27 states, 27 states have (on average 596.0) internal successors, (16092), 27 states have internal predecessors, (16092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:57:34,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:57:34,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 594 of 1615 [2023-08-24 13:57:34,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:57:36,973 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 13:57:40,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-24 13:57:43,665 WARN L539 Checker$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 13:57:45,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 13:57:48,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 13:57:51,661 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 13:58:25,458 INFO L124 PetriNetUnfolderBase]: 148525/203785 cut-off events. [2023-08-24 13:58:25,459 INFO L125 PetriNetUnfolderBase]: For 565095/565095 co-relation queries the response was YES. [2023-08-24 13:58:26,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739877 conditions, 203785 events. 148525/203785 cut-off events. For 565095/565095 co-relation queries the response was YES. Maximal size of possible extension queue 4385. Compared 1385656 event pairs, 14087 based on Foata normal form. 38/171605 useless extension candidates. Maximal degree in co-relation 739843. Up to 45475 conditions per place. [2023-08-24 13:58:27,232 INFO L140 encePairwiseOnDemand]: 1600/1615 looper letters, 2730 selfloop transitions, 139 changer transitions 188/3057 dead transitions. [2023-08-24 13:58:27,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 3057 transitions, 34448 flow [2023-08-24 13:58:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 13:58:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 13:58:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 26541 transitions. [2023-08-24 13:58:27,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38218734250125996 [2023-08-24 13:58:27,248 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 26541 transitions. [2023-08-24 13:58:27,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 26541 transitions. [2023-08-24 13:58:27,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:58:27,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 26541 transitions. [2023-08-24 13:58:27,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 617.2325581395348) internal successors, (26541), 43 states have internal predecessors, (26541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:58:27,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 1615.0) internal successors, (71060), 44 states have internal predecessors, (71060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:58:27,322 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 1615.0) internal successors, (71060), 44 states have internal predecessors, (71060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:58:27,322 INFO L175 Difference]: Start difference. First operand has 104 places, 176 transitions, 1805 flow. Second operand 43 states and 26541 transitions. [2023-08-24 13:58:27,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 3057 transitions, 34448 flow [2023-08-24 13:58:30,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 3057 transitions, 34321 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-24 13:58:30,136 INFO L231 Difference]: Finished difference. Result has 157 places, 312 transitions, 2588 flow [2023-08-24 13:58:30,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1615, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=2588, PETRI_PLACES=157, PETRI_TRANSITIONS=312} [2023-08-24 13:58:30,137 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 111 predicate places. [2023-08-24 13:58:30,137 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 312 transitions, 2588 flow [2023-08-24 13:58:30,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 596.0) internal successors, (16092), 27 states have internal predecessors, (16092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:58:30,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:58:30,139 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:58:30,145 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 13:58:30,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:58:30,342 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 13:58:30,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:58:30,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1294816816, now seen corresponding path program 1 times [2023-08-24 13:58:30,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:58:30,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374214721] [2023-08-24 13:58:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:58:30,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:58:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:58:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:58:30,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:58:30,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374214721] [2023-08-24 13:58:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374214721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:58:30,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:58:30,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:58:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993938310] [2023-08-24 13:58:30,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:58:30,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:58:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:58:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:58:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:58:30,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 637 out of 1615 [2023-08-24 13:58:30,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 312 transitions, 2588 flow. Second operand has 5 states, 5 states have (on average 643.2) internal successors, (3216), 5 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:58:30,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:58:30,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 637 of 1615 [2023-08-24 13:58:30,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand