/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:35:01,465 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:35:01,535 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:35:01,540 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:35:01,540 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:35:01,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:35:01,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:35:01,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:35:01,566 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:35:01,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:35:01,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:35:01,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:35:01,567 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:35:01,568 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:35:01,568 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:35:01,568 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:35:01,569 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:35:01,569 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:35:01,569 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:35:01,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:35:01,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:35:01,573 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:35:01,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:35:01,573 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:35:01,577 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:35:01,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:35:01,577 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:35:01,578 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:35:01,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:35:01,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:35:01,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:35:01,579 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:35:01,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:35:01,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:35:01,579 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:35:01,580 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:35:01,580 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:35:01,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:35:01,580 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:35:01,580 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:35:01,580 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:35:01,581 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:35:01,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:35:01,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:35:01,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:35:01,801 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:35:01,801 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:35:01,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c [2023-08-03 19:35:03,034 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:35:03,218 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:35:03,219 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c [2023-08-03 19:35:03,226 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e084adef/8565cfe48f604162ba09440e4db65b8f/FLAGdaded4535 [2023-08-03 19:35:03,242 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e084adef/8565cfe48f604162ba09440e4db65b8f [2023-08-03 19:35:03,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:35:03,250 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:35:03,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:35:03,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:35:03,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:35:03,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17934c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03, skipping insertion in model container [2023-08-03 19:35:03,259 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,287 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:35:03,429 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c[2857,2870] [2023-08-03 19:35:03,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:35:03,442 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:35:03,465 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c[2857,2870] [2023-08-03 19:35:03,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:35:03,486 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:35:03,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03 WrapperNode [2023-08-03 19:35:03,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:35:03,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:35:03,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:35:03,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:35:03,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,502 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,535 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 230 [2023-08-03 19:35:03,535 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:35:03,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:35:03,536 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:35:03,536 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:35:03,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,547 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,547 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:35:03,573 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:35:03,573 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:35:03,574 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:35:03,574 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (1/1) ... [2023-08-03 19:35:03,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:35:03,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:35:03,609 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) [2023-08-03 19:35:03,610 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 [2023-08-03 19:35:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:35:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:35:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:35:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:35:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 19:35:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 19:35:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 19:35:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 19:35:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:35:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 19:35:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:35:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:35:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:35:03,637 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 19:35:03,722 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:35:03,724 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:35:04,127 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:35:04,139 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:35:04,139 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-03 19:35:04,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:35:04 BoogieIcfgContainer [2023-08-03 19:35:04,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:35:04,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:35:04,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:35:04,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:35:04,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:35:03" (1/3) ... [2023-08-03 19:35:04,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48409d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:35:04, skipping insertion in model container [2023-08-03 19:35:04,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:35:03" (2/3) ... [2023-08-03 19:35:04,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48409d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:35:04, skipping insertion in model container [2023-08-03 19:35:04,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:35:04" (3/3) ... [2023-08-03 19:35:04,150 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-chromosome-symm.wvr_bound2.c [2023-08-03 19:35:04,157 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:35:04,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:35:04,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 19:35:04,165 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:35:04,262 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 19:35:04,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-03 19:35:04,500 INFO L124 PetriNetUnfolderBase]: 57/472 cut-off events. [2023-08-03 19:35:04,500 INFO L125 PetriNetUnfolderBase]: For 8/13 co-relation queries the response was YES. [2023-08-03 19:35:04,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 472 events. 57/472 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1843 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 263. Up to 8 conditions per place. [2023-08-03 19:35:04,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 544 flow [2023-08-03 19:35:04,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 261 transitions, 544 flow [2023-08-03 19:35:04,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:35:04,543 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-03 19:35:04,547 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-03 19:35:04,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-03 19:35:04,610 INFO L124 PetriNetUnfolderBase]: 57/472 cut-off events. [2023-08-03 19:35:04,611 INFO L125 PetriNetUnfolderBase]: For 8/13 co-relation queries the response was YES. [2023-08-03 19:35:04,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 472 events. 57/472 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1843 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 263. Up to 8 conditions per place. [2023-08-03 19:35:04,627 INFO L119 LiptonReduction]: Number of co-enabled transitions 16110 [2023-08-03 19:35:10,136 INFO L134 LiptonReduction]: Checked pairs total: 18874 [2023-08-03 19:35:10,137 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-03 19:35:10,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:35:10,154 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=true, 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;@1986a307, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:35:10,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:35:10,160 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:35:10,160 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-03 19:35:10,160 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:35:10,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:35:10,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 19:35:10,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:35:10,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:35:10,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1940426108, now seen corresponding path program 1 times [2023-08-03 19:35:10,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:35:10,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263167480] [2023-08-03 19:35:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:35:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:35:10,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:35:10,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263167480] [2023-08-03 19:35:10,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263167480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:35:10,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:35:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:35:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495155224] [2023-08-03 19:35:10,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:35:10,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:35:10,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:35:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:35:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:35:10,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 543 [2023-08-03 19:35:10,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:10,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:35:10,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 543 [2023-08-03 19:35:10,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:35:10,745 INFO L124 PetriNetUnfolderBase]: 628/1059 cut-off events. [2023-08-03 19:35:10,746 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-03 19:35:10,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2138 conditions, 1059 events. 628/1059 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4628 event pairs, 476 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 1796. Up to 1024 conditions per place. [2023-08-03 19:35:10,752 INFO L140 encePairwiseOnDemand]: 536/543 looper letters, 33 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-08-03 19:35:10,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 178 flow [2023-08-03 19:35:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:35:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:35:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-08-03 19:35:10,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953345610804173 [2023-08-03 19:35:10,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-08-03 19:35:10,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-08-03 19:35:10,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:35:10,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-08-03 19:35:10,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:10,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:10,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:10,785 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 104 flow. Second operand 3 states and 716 transitions. [2023-08-03 19:35:10,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 178 flow [2023-08-03 19:35:10,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:35:10,790 INFO L231 Difference]: Finished difference. Result has 39 places, 41 transitions, 122 flow [2023-08-03 19:35:10,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=41} [2023-08-03 19:35:10,794 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-08-03 19:35:10,794 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 41 transitions, 122 flow [2023-08-03 19:35:10,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:10,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:35:10,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:35:10,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:35:10,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:35:10,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:35:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash 799704509, now seen corresponding path program 1 times [2023-08-03 19:35:10,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:35:10,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369658746] [2023-08-03 19:35:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:10,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:35:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 19:35:10,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:35:10,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369658746] [2023-08-03 19:35:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369658746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:35:10,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298476689] [2023-08-03 19:35:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:10,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:35:10,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:35:10,914 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) [2023-08-03 19:35:10,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 19:35:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:10,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-03 19:35:11,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:35:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 19:35:11,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:35:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 19:35:11,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298476689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:35:11,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:35:11,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-03 19:35:11,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197249545] [2023-08-03 19:35:11,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:35:11,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 19:35:11,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:35:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 19:35:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-03 19:35:11,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 543 [2023-08-03 19:35:11,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 222.75) internal successors, (1782), 8 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:11,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:35:11,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 543 [2023-08-03 19:35:11,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:35:11,369 INFO L124 PetriNetUnfolderBase]: 628/1065 cut-off events. [2023-08-03 19:35:11,369 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-03 19:35:11,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1065 events. 628/1065 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4618 event pairs, 476 based on Foata normal form. 3/827 useless extension candidates. Maximal degree in co-relation 2135. Up to 1024 conditions per place. [2023-08-03 19:35:11,375 INFO L140 encePairwiseOnDemand]: 538/543 looper letters, 33 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2023-08-03 19:35:11,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 232 flow [2023-08-03 19:35:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 19:35:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 19:35:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1375 transitions. [2023-08-03 19:35:11,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220380601596071 [2023-08-03 19:35:11,383 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1375 transitions. [2023-08-03 19:35:11,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1375 transitions. [2023-08-03 19:35:11,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:35:11,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1375 transitions. [2023-08-03 19:35:11,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 229.16666666666666) internal successors, (1375), 6 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:11,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:11,398 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 543.0) internal successors, (3801), 7 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:11,398 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 122 flow. Second operand 6 states and 1375 transitions. [2023-08-03 19:35:11,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 232 flow [2023-08-03 19:35:11,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:35:11,401 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 184 flow [2023-08-03 19:35:11,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-03 19:35:11,402 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-08-03 19:35:11,403 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 184 flow [2023-08-03 19:35:11,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 222.75) internal successors, (1782), 8 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:11,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:35:11,404 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 19:35:11,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 19:35:11,612 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 [2023-08-03 19:35:11,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:35:11,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:35:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash -591867588, now seen corresponding path program 2 times [2023-08-03 19:35:11,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:35:11,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373379679] [2023-08-03 19:35:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:11,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:35:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:35:11,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:35:11,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373379679] [2023-08-03 19:35:11,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373379679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:35:11,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580059578] [2023-08-03 19:35:11,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:35:11,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:35:11,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:35:11,820 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) [2023-08-03 19:35:11,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 19:35:11,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:35:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:35:11,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:35:11,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:35:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:35:11,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:35:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 19:35:12,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580059578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:35:12,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:35:12,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-03 19:35:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139662712] [2023-08-03 19:35:12,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:35:12,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 19:35:12,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:35:12,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 19:35:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-03 19:35:12,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 543 [2023-08-03 19:35:12,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 184 flow. Second operand has 17 states, 17 states have (on average 222.35294117647058) internal successors, (3780), 17 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:12,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:35:12,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 543 [2023-08-03 19:35:12,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:35:12,536 INFO L124 PetriNetUnfolderBase]: 628/1067 cut-off events. [2023-08-03 19:35:12,537 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-03 19:35:12,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2197 conditions, 1067 events. 628/1067 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4610 event pairs, 476 based on Foata normal form. 1/827 useless extension candidates. Maximal degree in co-relation 2126. Up to 1024 conditions per place. [2023-08-03 19:35:12,543 INFO L140 encePairwiseOnDemand]: 538/543 looper letters, 33 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-08-03 19:35:12,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 286 flow [2023-08-03 19:35:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 19:35:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 19:35:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1594 transitions. [2023-08-03 19:35:12,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4193633254406735 [2023-08-03 19:35:12,548 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1594 transitions. [2023-08-03 19:35:12,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1594 transitions. [2023-08-03 19:35:12,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:35:12,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1594 transitions. [2023-08-03 19:35:12,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 227.71428571428572) internal successors, (1594), 7 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:12,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 543.0) internal successors, (4344), 8 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:12,560 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 543.0) internal successors, (4344), 8 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:12,561 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 184 flow. Second operand 7 states and 1594 transitions. [2023-08-03 19:35:12,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 286 flow [2023-08-03 19:35:12,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 270 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 19:35:12,566 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 214 flow [2023-08-03 19:35:12,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-03 19:35:12,568 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2023-08-03 19:35:12,568 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 214 flow [2023-08-03 19:35:12,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 222.35294117647058) internal successors, (3780), 17 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:12,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:35:12,571 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 19:35:12,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 19:35:12,783 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 [2023-08-03 19:35:12,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:35:12,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:35:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1174974211, now seen corresponding path program 3 times [2023-08-03 19:35:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:35:12,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434176774] [2023-08-03 19:35:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:35:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:35:12,830 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:35:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:35:12,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:35:12,871 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:35:12,872 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 19:35:12,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 19:35:12,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 19:35:12,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 19:35:12,874 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-03 19:35:12,876 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:35:12,876 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:35:12,925 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 19:35:12,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 357 transitions, 762 flow [2023-08-03 19:35:13,112 INFO L124 PetriNetUnfolderBase]: 197/1366 cut-off events. [2023-08-03 19:35:13,112 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2023-08-03 19:35:13,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1366 events. 197/1366 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 8191 event pairs, 1 based on Foata normal form. 0/1166 useless extension candidates. Maximal degree in co-relation 826. Up to 32 conditions per place. [2023-08-03 19:35:13,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 357 transitions, 762 flow [2023-08-03 19:35:13,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 357 transitions, 762 flow [2023-08-03 19:35:13,145 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:35:13,146 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 357 transitions, 762 flow [2023-08-03 19:35:13,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 357 transitions, 762 flow [2023-08-03 19:35:13,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 357 transitions, 762 flow [2023-08-03 19:35:13,332 INFO L124 PetriNetUnfolderBase]: 197/1366 cut-off events. [2023-08-03 19:35:13,332 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2023-08-03 19:35:13,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1366 events. 197/1366 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 8191 event pairs, 1 based on Foata normal form. 0/1166 useless extension candidates. Maximal degree in co-relation 826. Up to 32 conditions per place. [2023-08-03 19:35:13,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 50220 [2023-08-03 19:35:20,067 INFO L134 LiptonReduction]: Checked pairs total: 67084 [2023-08-03 19:35:20,067 INFO L136 LiptonReduction]: Total number of compositions: 378 [2023-08-03 19:35:20,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:35:20,070 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=true, 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;@1986a307, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:35:20,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:35:20,073 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:35:20,073 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-03 19:35:20,073 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 19:35:20,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:35:20,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:35:20,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:35:20,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:35:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash 253678658, now seen corresponding path program 1 times [2023-08-03 19:35:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:35:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473291737] [2023-08-03 19:35:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:20,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:35:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:35:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:35:20,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473291737] [2023-08-03 19:35:20,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473291737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:35:20,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:35:20,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:35:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975636757] [2023-08-03 19:35:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:35:20,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:35:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:35:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:35:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:35:20,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 735 [2023-08-03 19:35:20,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 64 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:20,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:35:20,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 735 [2023-08-03 19:35:20,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:35:27,754 INFO L124 PetriNetUnfolderBase]: 84654/111453 cut-off events. [2023-08-03 19:35:27,754 INFO L125 PetriNetUnfolderBase]: For 6938/6938 co-relation queries the response was YES. [2023-08-03 19:35:27,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224590 conditions, 111453 events. 84654/111453 cut-off events. For 6938/6938 co-relation queries the response was YES. Maximal size of possible extension queue 2657. Compared 633466 event pairs, 68496 based on Foata normal form. 0/90565 useless extension candidates. Maximal degree in co-relation 58974. Up to 109306 conditions per place. [2023-08-03 19:35:28,385 INFO L140 encePairwiseOnDemand]: 727/735 looper letters, 53 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-08-03 19:35:28,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 288 flow [2023-08-03 19:35:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:35:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:35:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 983 transitions. [2023-08-03 19:35:28,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44580498866213153 [2023-08-03 19:35:28,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 983 transitions. [2023-08-03 19:35:28,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 983 transitions. [2023-08-03 19:35:28,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:35:28,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 983 transitions. [2023-08-03 19:35:28,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:28,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:28,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:28,399 INFO L175 Difference]: Start difference. First operand has 57 places, 64 transitions, 176 flow. Second operand 3 states and 983 transitions. [2023-08-03 19:35:28,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 288 flow [2023-08-03 19:35:28,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 288 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:35:28,408 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 192 flow [2023-08-03 19:35:28,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=59, PETRI_TRANSITIONS=63} [2023-08-03 19:35:28,409 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-03 19:35:28,409 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 192 flow [2023-08-03 19:35:28,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:28,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:35:28,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:35:28,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 19:35:28,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:35:28,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:35:28,410 INFO L85 PathProgramCache]: Analyzing trace with hash -190674558, now seen corresponding path program 1 times [2023-08-03 19:35:28,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:35:28,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843519474] [2023-08-03 19:35:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:28,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:35:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:35:28,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:35:28,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843519474] [2023-08-03 19:35:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843519474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:35:28,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:35:28,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 19:35:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356415445] [2023-08-03 19:35:28,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:35:28,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:35:28,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:35:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:35:28,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:35:28,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 735 [2023-08-03 19:35:28,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 63 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:28,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:35:28,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 735 [2023-08-03 19:35:28,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:35:35,749 INFO L124 PetriNetUnfolderBase]: 84412/110883 cut-off events. [2023-08-03 19:35:35,749 INFO L125 PetriNetUnfolderBase]: For 6864/6864 co-relation queries the response was YES. [2023-08-03 19:35:35,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223873 conditions, 110883 events. 84412/110883 cut-off events. For 6864/6864 co-relation queries the response was YES. Maximal size of possible extension queue 2587. Compared 626010 event pairs, 50487 based on Foata normal form. 0/90216 useless extension candidates. Maximal degree in co-relation 223848. Up to 108929 conditions per place. [2023-08-03 19:35:36,361 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 63 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-03 19:35:36,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 71 transitions, 338 flow [2023-08-03 19:35:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:35:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:35:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 997 transitions. [2023-08-03 19:35:36,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45215419501133786 [2023-08-03 19:35:36,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 997 transitions. [2023-08-03 19:35:36,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 997 transitions. [2023-08-03 19:35:36,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:35:36,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 997 transitions. [2023-08-03 19:35:36,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.3333333333333) internal successors, (997), 3 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:36,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:36,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:36,375 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 192 flow. Second operand 3 states and 997 transitions. [2023-08-03 19:35:36,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 71 transitions, 338 flow [2023-08-03 19:35:36,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:35:36,380 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 200 flow [2023-08-03 19:35:36,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2023-08-03 19:35:36,384 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-03 19:35:36,384 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 200 flow [2023-08-03 19:35:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:36,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:35:36,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:35:36,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 19:35:36,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:35:36,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:35:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash 415882844, now seen corresponding path program 1 times [2023-08-03 19:35:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:35:36,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395860447] [2023-08-03 19:35:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:36,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:35:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 19:35:36,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:35:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395860447] [2023-08-03 19:35:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395860447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:35:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495560963] [2023-08-03 19:35:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:36,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:35:36,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:35:36,460 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) [2023-08-03 19:35:36,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 19:35:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:36,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-03 19:35:36,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:35:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 19:35:36,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:35:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 19:35:36,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495560963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:35:36,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:35:36,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-03 19:35:36,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697749307] [2023-08-03 19:35:36,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:35:36,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 19:35:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:35:36,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 19:35:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-03 19:35:36,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 735 [2023-08-03 19:35:36,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 304.875) internal successors, (2439), 8 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:36,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:35:36,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 735 [2023-08-03 19:35:36,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:35:44,140 INFO L124 PetriNetUnfolderBase]: 84412/110892 cut-off events. [2023-08-03 19:35:44,140 INFO L125 PetriNetUnfolderBase]: For 6953/6953 co-relation queries the response was YES. [2023-08-03 19:35:44,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223982 conditions, 110892 events. 84412/110892 cut-off events. For 6953/6953 co-relation queries the response was YES. Maximal size of possible extension queue 2587. Compared 626249 event pairs, 68342 based on Foata normal form. 3/90274 useless extension candidates. Maximal degree in co-relation 223933. Up to 108936 conditions per place. [2023-08-03 19:35:44,746 INFO L140 encePairwiseOnDemand]: 730/735 looper letters, 54 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2023-08-03 19:35:44,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 352 flow [2023-08-03 19:35:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 19:35:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 19:35:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1887 transitions. [2023-08-03 19:35:44,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427891156462585 [2023-08-03 19:35:44,752 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1887 transitions. [2023-08-03 19:35:44,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1887 transitions. [2023-08-03 19:35:44,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:35:44,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1887 transitions. [2023-08-03 19:35:44,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 314.5) internal successors, (1887), 6 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:44,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 735.0) internal successors, (5145), 7 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:44,764 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 735.0) internal successors, (5145), 7 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:44,764 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 200 flow. Second operand 6 states and 1887 transitions. [2023-08-03 19:35:44,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 352 flow [2023-08-03 19:35:44,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:35:44,769 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 264 flow [2023-08-03 19:35:44,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-08-03 19:35:44,770 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2023-08-03 19:35:44,770 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 264 flow [2023-08-03 19:35:44,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 304.875) internal successors, (2439), 8 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:44,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:35:44,772 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 19:35:44,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 19:35:44,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:35:44,977 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:35:44,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:35:44,978 INFO L85 PathProgramCache]: Analyzing trace with hash 486808860, now seen corresponding path program 2 times [2023-08-03 19:35:44,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:35:44,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903254547] [2023-08-03 19:35:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:44,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:35:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:35:45,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:35:45,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903254547] [2023-08-03 19:35:45,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903254547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:35:45,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739386249] [2023-08-03 19:35:45,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:35:45,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:35:45,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:35:45,144 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) [2023-08-03 19:35:45,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 19:35:45,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:35:45,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:35:45,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:35:45,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:35:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:35:45,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:35:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:35:45,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739386249] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:35:45,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:35:45,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-03 19:35:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046245879] [2023-08-03 19:35:45,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:35:45,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 19:35:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:35:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 19:35:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-03 19:35:45,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 735 [2023-08-03 19:35:45,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 264 flow. Second operand has 17 states, 17 states have (on average 304.4117647058824) internal successors, (5175), 17 states have internal predecessors, (5175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:45,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:35:45,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 735 [2023-08-03 19:35:45,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:35:53,306 INFO L124 PetriNetUnfolderBase]: 84412/110894 cut-off events. [2023-08-03 19:35:53,306 INFO L125 PetriNetUnfolderBase]: For 6958/6958 co-relation queries the response was YES. [2023-08-03 19:35:53,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224008 conditions, 110894 events. 84412/110894 cut-off events. For 6958/6958 co-relation queries the response was YES. Maximal size of possible extension queue 2587. Compared 626195 event pairs, 68342 based on Foata normal form. 1/90274 useless extension candidates. Maximal degree in co-relation 223934. Up to 108936 conditions per place. [2023-08-03 19:35:53,938 INFO L140 encePairwiseOnDemand]: 730/735 looper letters, 54 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2023-08-03 19:35:53,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 408 flow [2023-08-03 19:35:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 19:35:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 19:35:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2188 transitions. [2023-08-03 19:35:53,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42526724975704566 [2023-08-03 19:35:53,944 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2188 transitions. [2023-08-03 19:35:53,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2188 transitions. [2023-08-03 19:35:53,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:35:53,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2188 transitions. [2023-08-03 19:35:53,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 312.57142857142856) internal successors, (2188), 7 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:53,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 735.0) internal successors, (5880), 8 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:53,968 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 735.0) internal successors, (5880), 8 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:53,968 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 264 flow. Second operand 7 states and 2188 transitions. [2023-08-03 19:35:53,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 408 flow [2023-08-03 19:35:53,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 392 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-03 19:35:53,975 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 294 flow [2023-08-03 19:35:53,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2023-08-03 19:35:53,976 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2023-08-03 19:35:53,976 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 294 flow [2023-08-03 19:35:53,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 304.4117647058824) internal successors, (5175), 17 states have internal predecessors, (5175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:53,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:35:53,985 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 19:35:54,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 19:35:54,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:35:54,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:35:54,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:35:54,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1585320540, now seen corresponding path program 3 times [2023-08-03 19:35:54,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:35:54,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799917506] [2023-08-03 19:35:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:35:54,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:35:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:35:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-03 19:35:54,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:35:54,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799917506] [2023-08-03 19:35:54,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799917506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:35:54,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671251440] [2023-08-03 19:35:54,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 19:35:54,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:35:54,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:35:54,274 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) [2023-08-03 19:35:54,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 19:35:54,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-03 19:35:54,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:35:54,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:35:54,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:35:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-03 19:35:54,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:35:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671251440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:35:54,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:35:54,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 19:35:54,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907045121] [2023-08-03 19:35:54,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:35:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:35:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:35:54,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:35:54,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:35:54,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-03 19:35:54,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 312.4) internal successors, (1562), 5 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:35:54,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:35:54,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-03 19:35:54,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:01,845 INFO L124 PetriNetUnfolderBase]: 84340/110806 cut-off events. [2023-08-03 19:36:01,846 INFO L125 PetriNetUnfolderBase]: For 6776/6776 co-relation queries the response was YES. [2023-08-03 19:36:02,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223813 conditions, 110806 events. 84340/110806 cut-off events. For 6776/6776 co-relation queries the response was YES. Maximal size of possible extension queue 2587. Compared 627082 event pairs, 33312 based on Foata normal form. 36/90222 useless extension candidates. Maximal degree in co-relation 223734. Up to 108712 conditions per place. [2023-08-03 19:36:02,549 INFO L140 encePairwiseOnDemand]: 731/735 looper letters, 82 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-08-03 19:36:02,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 502 flow [2023-08-03 19:36:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:36:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:36:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1627 transitions. [2023-08-03 19:36:02,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44272108843537417 [2023-08-03 19:36:02,554 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1627 transitions. [2023-08-03 19:36:02,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1627 transitions. [2023-08-03 19:36:02,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:02,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1627 transitions. [2023-08-03 19:36:02,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.4) internal successors, (1627), 5 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:02,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:02,562 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:02,562 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 294 flow. Second operand 5 states and 1627 transitions. [2023-08-03 19:36:02,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 502 flow [2023-08-03 19:36:02,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 472 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-03 19:36:02,568 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 279 flow [2023-08-03 19:36:02,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-08-03 19:36:02,569 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2023-08-03 19:36:02,569 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 279 flow [2023-08-03 19:36:02,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.4) internal successors, (1562), 5 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:02,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:02,570 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:02,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 19:36:02,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:02,776 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:02,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash -387516413, now seen corresponding path program 1 times [2023-08-03 19:36:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:02,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936295306] [2023-08-03 19:36:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-03 19:36:02,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:02,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936295306] [2023-08-03 19:36:02,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936295306] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:36:02,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348278075] [2023-08-03 19:36:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:02,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:02,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:36:02,836 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) [2023-08-03 19:36:02,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 19:36:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:02,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:36:02,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:36:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-03 19:36:02,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:36:02,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348278075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:36:02,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:36:02,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 19:36:02,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948870068] [2023-08-03 19:36:02,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:36:02,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:36:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:36:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:36:02,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 735 [2023-08-03 19:36:02,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:02,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:02,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 735 [2023-08-03 19:36:02,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:10,337 INFO L124 PetriNetUnfolderBase]: 84298/111284 cut-off events. [2023-08-03 19:36:10,337 INFO L125 PetriNetUnfolderBase]: For 5169/5169 co-relation queries the response was YES. [2023-08-03 19:36:10,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223765 conditions, 111284 events. 84298/111284 cut-off events. For 5169/5169 co-relation queries the response was YES. Maximal size of possible extension queue 2603. Compared 634429 event pairs, 50294 based on Foata normal form. 0/90545 useless extension candidates. Maximal degree in co-relation 223696. Up to 107794 conditions per place. [2023-08-03 19:36:11,043 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 84 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-08-03 19:36:11,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 92 transitions, 493 flow [2023-08-03 19:36:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:36:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:36:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1009 transitions. [2023-08-03 19:36:11,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575963718820862 [2023-08-03 19:36:11,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1009 transitions. [2023-08-03 19:36:11,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1009 transitions. [2023-08-03 19:36:11,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:11,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1009 transitions. [2023-08-03 19:36:11,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:11,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:11,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:11,052 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 279 flow. Second operand 3 states and 1009 transitions. [2023-08-03 19:36:11,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 92 transitions, 493 flow [2023-08-03 19:36:11,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 486 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 19:36:11,056 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 287 flow [2023-08-03 19:36:11,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2023-08-03 19:36:11,057 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2023-08-03 19:36:11,058 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 287 flow [2023-08-03 19:36:11,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:11,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:11,058 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:11,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 19:36:11,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:11,265 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:11,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1521399550, now seen corresponding path program 1 times [2023-08-03 19:36:11,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:11,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278128610] [2023-08-03 19:36:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:11,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-03 19:36:11,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278128610] [2023-08-03 19:36:11,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278128610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:36:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763922336] [2023-08-03 19:36:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:11,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:36:11,332 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) [2023-08-03 19:36:11,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 19:36:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:11,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:36:11,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:36:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-03 19:36:11,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:36:11,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763922336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:36:11,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:36:11,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 19:36:11,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562680126] [2023-08-03 19:36:11,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:36:11,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:36:11,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:11,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:36:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:36:11,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 735 [2023-08-03 19:36:11,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:11,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:11,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 735 [2023-08-03 19:36:11,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:16,683 INFO L124 PetriNetUnfolderBase]: 57790/78065 cut-off events. [2023-08-03 19:36:16,683 INFO L125 PetriNetUnfolderBase]: For 6336/6336 co-relation queries the response was YES. [2023-08-03 19:36:16,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161062 conditions, 78065 events. 57790/78065 cut-off events. For 6336/6336 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 454346 event pairs, 33680 based on Foata normal form. 0/66110 useless extension candidates. Maximal degree in co-relation 160992. Up to 55384 conditions per place. [2023-08-03 19:36:17,150 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 96 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2023-08-03 19:36:17,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 553 flow [2023-08-03 19:36:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:36:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:36:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-03 19:36:17,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621315192743764 [2023-08-03 19:36:17,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-03 19:36:17,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-03 19:36:17,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:17,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-03 19:36:17,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:17,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:17,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:17,158 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 287 flow. Second operand 3 states and 1019 transitions. [2023-08-03 19:36:17,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 553 flow [2023-08-03 19:36:17,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 550 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:36:17,162 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 296 flow [2023-08-03 19:36:17,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-08-03 19:36:17,163 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2023-08-03 19:36:17,163 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 296 flow [2023-08-03 19:36:17,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:17,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:17,164 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:17,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 19:36:17,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:17,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:17,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:17,373 INFO L85 PathProgramCache]: Analyzing trace with hash -467686723, now seen corresponding path program 1 times [2023-08-03 19:36:17,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:17,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990739296] [2023-08-03 19:36:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:17,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-03 19:36:17,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990739296] [2023-08-03 19:36:17,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990739296] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:36:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592541243] [2023-08-03 19:36:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:17,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:17,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:36:17,443 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) [2023-08-03 19:36:17,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 19:36:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:17,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:36:17,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:36:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-03 19:36:17,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:36:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-03 19:36:17,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592541243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:36:17,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:36:17,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:36:17,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178159466] [2023-08-03 19:36:17,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:36:17,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:36:17,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:36:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:36:17,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-03 19:36:17,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:17,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:17,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-03 19:36:17,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:22,395 INFO L124 PetriNetUnfolderBase]: 54112/72689 cut-off events. [2023-08-03 19:36:22,395 INFO L125 PetriNetUnfolderBase]: For 14350/14350 co-relation queries the response was YES. [2023-08-03 19:36:22,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154381 conditions, 72689 events. 54112/72689 cut-off events. For 14350/14350 co-relation queries the response was YES. Maximal size of possible extension queue 1485. Compared 409685 event pairs, 21098 based on Foata normal form. 6/62389 useless extension candidates. Maximal degree in co-relation 154310. Up to 70927 conditions per place. [2023-08-03 19:36:22,844 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 84 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-08-03 19:36:22,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 92 transitions, 502 flow [2023-08-03 19:36:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:36:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:36:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1316 transitions. [2023-08-03 19:36:22,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2023-08-03 19:36:22,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1316 transitions. [2023-08-03 19:36:22,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1316 transitions. [2023-08-03 19:36:22,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:22,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1316 transitions. [2023-08-03 19:36:22,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:22,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:22,853 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:22,853 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 296 flow. Second operand 4 states and 1316 transitions. [2023-08-03 19:36:22,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 92 transitions, 502 flow [2023-08-03 19:36:22,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 92 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:36:22,929 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 292 flow [2023-08-03 19:36:22,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-08-03 19:36:22,929 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2023-08-03 19:36:22,930 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 292 flow [2023-08-03 19:36:22,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:22,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:22,930 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:22,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 19:36:23,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 19:36:23,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:23,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash 520780539, now seen corresponding path program 1 times [2023-08-03 19:36:23,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:23,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714348525] [2023-08-03 19:36:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:23,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-03 19:36:23,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:23,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714348525] [2023-08-03 19:36:23,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714348525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:36:23,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847571155] [2023-08-03 19:36:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:23,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:23,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:36:23,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:36:23,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 19:36:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:23,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:36:23,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:36:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-03 19:36:23,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:36:23,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847571155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:36:23,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:36:23,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 19:36:23,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853880432] [2023-08-03 19:36:23,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:36:23,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:36:23,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:23,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:36:23,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:36:23,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-03 19:36:23,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:23,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:23,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-03 19:36:23,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:27,749 INFO L124 PetriNetUnfolderBase]: 48928/66269 cut-off events. [2023-08-03 19:36:27,749 INFO L125 PetriNetUnfolderBase]: For 4894/4894 co-relation queries the response was YES. [2023-08-03 19:36:27,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140192 conditions, 66269 events. 48928/66269 cut-off events. For 4894/4894 co-relation queries the response was YES. Maximal size of possible extension queue 1356. Compared 376670 event pairs, 348 based on Foata normal form. 1296/58201 useless extension candidates. Maximal degree in co-relation 140121. Up to 56296 conditions per place. [2023-08-03 19:36:28,136 INFO L140 encePairwiseOnDemand]: 731/735 looper letters, 120 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2023-08-03 19:36:28,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 650 flow [2023-08-03 19:36:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:36:28,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:36:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1663 transitions. [2023-08-03 19:36:28,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525170068027211 [2023-08-03 19:36:28,139 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1663 transitions. [2023-08-03 19:36:28,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1663 transitions. [2023-08-03 19:36:28,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:28,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1663 transitions. [2023-08-03 19:36:28,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 332.6) internal successors, (1663), 5 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:28,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:28,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:28,147 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 292 flow. Second operand 5 states and 1663 transitions. [2023-08-03 19:36:28,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 650 flow [2023-08-03 19:36:28,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 128 transitions, 638 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 19:36:28,449 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 297 flow [2023-08-03 19:36:28,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-08-03 19:36:28,449 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2023-08-03 19:36:28,449 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 297 flow [2023-08-03 19:36:28,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.4) internal successors, (1567), 5 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:28,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:28,450 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:28,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 19:36:28,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 19:36:28,656 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:28,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:28,657 INFO L85 PathProgramCache]: Analyzing trace with hash -239675206, now seen corresponding path program 1 times [2023-08-03 19:36:28,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:28,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33197430] [2023-08-03 19:36:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:28,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-08-03 19:36:28,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:28,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33197430] [2023-08-03 19:36:28,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33197430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:36:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020564917] [2023-08-03 19:36:28,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:28,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:36:28,742 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:36:28,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 19:36:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:28,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:36:28,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:36:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-03 19:36:28,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:36:28,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020564917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:36:28,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:36:28,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 19:36:28,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262637172] [2023-08-03 19:36:28,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:36:28,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:36:28,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:36:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:36:28,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 735 [2023-08-03 19:36:28,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:28,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:28,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 735 [2023-08-03 19:36:28,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:32,646 INFO L124 PetriNetUnfolderBase]: 41923/56963 cut-off events. [2023-08-03 19:36:32,647 INFO L125 PetriNetUnfolderBase]: For 21393/21393 co-relation queries the response was YES. [2023-08-03 19:36:32,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125930 conditions, 56963 events. 41923/56963 cut-off events. For 21393/21393 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 319508 event pairs, 28908 based on Foata normal form. 0/49525 useless extension candidates. Maximal degree in co-relation 125858. Up to 46198 conditions per place. [2023-08-03 19:36:33,224 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 97 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2023-08-03 19:36:33,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 563 flow [2023-08-03 19:36:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:36:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:36:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-03 19:36:33,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621315192743764 [2023-08-03 19:36:33,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-03 19:36:33,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-03 19:36:33,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:33,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-03 19:36:33,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:33,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:33,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:33,230 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 297 flow. Second operand 3 states and 1019 transitions. [2023-08-03 19:36:33,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 563 flow [2023-08-03 19:36:33,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 103 transitions, 556 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 19:36:33,295 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 302 flow [2023-08-03 19:36:33,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2023-08-03 19:36:33,296 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2023-08-03 19:36:33,296 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 302 flow [2023-08-03 19:36:33,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:33,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:33,296 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:33,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 19:36:33,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 19:36:33,497 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:33,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:33,497 INFO L85 PathProgramCache]: Analyzing trace with hash -947888213, now seen corresponding path program 1 times [2023-08-03 19:36:33,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:33,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853459019] [2023-08-03 19:36:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:33,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-03 19:36:33,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853459019] [2023-08-03 19:36:33,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853459019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:36:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371992934] [2023-08-03 19:36:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:33,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:33,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:36:33,568 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:36:33,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 19:36:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:33,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:36:33,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:36:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-03 19:36:33,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:36:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-03 19:36:33,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371992934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:36:33,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:36:33,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:36:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485199456] [2023-08-03 19:36:33,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:36:33,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:36:33,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:33,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:36:33,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:36:33,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-03 19:36:33,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 316.4) internal successors, (1582), 5 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:33,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:33,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-03 19:36:33,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:37,608 INFO L124 PetriNetUnfolderBase]: 40303/54936 cut-off events. [2023-08-03 19:36:37,608 INFO L125 PetriNetUnfolderBase]: For 12002/12002 co-relation queries the response was YES. [2023-08-03 19:36:37,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121221 conditions, 54936 events. 40303/54936 cut-off events. For 12002/12002 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 304630 event pairs, 14372 based on Foata normal form. 216/48285 useless extension candidates. Maximal degree in co-relation 121148. Up to 45280 conditions per place. [2023-08-03 19:36:37,982 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 109 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2023-08-03 19:36:37,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 606 flow [2023-08-03 19:36:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:36:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:36:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1340 transitions. [2023-08-03 19:36:37,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2023-08-03 19:36:37,984 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1340 transitions. [2023-08-03 19:36:37,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1340 transitions. [2023-08-03 19:36:37,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:37,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1340 transitions. [2023-08-03 19:36:37,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:37,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:37,989 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:37,989 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 302 flow. Second operand 4 states and 1340 transitions. [2023-08-03 19:36:37,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 606 flow [2023-08-03 19:36:38,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 116 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:36:38,738 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 298 flow [2023-08-03 19:36:38,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2023-08-03 19:36:38,738 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-08-03 19:36:38,739 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 298 flow [2023-08-03 19:36:38,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 316.4) internal successors, (1582), 5 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:38,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:38,739 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:38,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 19:36:38,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 19:36:38,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:38,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:38,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1209374985, now seen corresponding path program 1 times [2023-08-03 19:36:38,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:38,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131757916] [2023-08-03 19:36:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:38,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-03 19:36:39,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:39,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131757916] [2023-08-03 19:36:39,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131757916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:36:39,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947299855] [2023-08-03 19:36:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:39,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:39,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:36:39,017 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:36:39,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 19:36:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:39,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:36:39,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:36:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-03 19:36:39,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:36:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-03 19:36:39,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947299855] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:36:39,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:36:39,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:36:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089499653] [2023-08-03 19:36:39,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:36:39,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:36:39,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:36:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:36:39,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-03 19:36:39,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:39,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:39,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-03 19:36:39,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:42,190 INFO L124 PetriNetUnfolderBase]: 32215/43524 cut-off events. [2023-08-03 19:36:42,190 INFO L125 PetriNetUnfolderBase]: For 18765/18765 co-relation queries the response was YES. [2023-08-03 19:36:42,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97544 conditions, 43524 events. 32215/43524 cut-off events. For 18765/18765 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 232530 event pairs, 10507 based on Foata normal form. 864/38821 useless extension candidates. Maximal degree in co-relation 97471. Up to 17183 conditions per place. [2023-08-03 19:36:42,476 INFO L140 encePairwiseOnDemand]: 731/735 looper letters, 119 selfloop transitions, 4 changer transitions 0/127 dead transitions. [2023-08-03 19:36:42,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 660 flow [2023-08-03 19:36:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:36:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:36:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1351 transitions. [2023-08-03 19:36:42,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2023-08-03 19:36:42,478 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1351 transitions. [2023-08-03 19:36:42,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1351 transitions. [2023-08-03 19:36:42,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:42,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1351 transitions. [2023-08-03 19:36:42,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.75) internal successors, (1351), 4 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:42,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:42,482 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:42,483 INFO L175 Difference]: Start difference. First operand has 81 places, 73 transitions, 298 flow. Second operand 4 states and 1351 transitions. [2023-08-03 19:36:42,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 660 flow [2023-08-03 19:36:42,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 654 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:36:42,590 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 312 flow [2023-08-03 19:36:42,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2023-08-03 19:36:42,591 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2023-08-03 19:36:42,591 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 312 flow [2023-08-03 19:36:42,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:42,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:42,591 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:42,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-03 19:36:42,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 19:36:42,792 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:42,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2118131800, now seen corresponding path program 1 times [2023-08-03 19:36:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:42,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720729597] [2023-08-03 19:36:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:42,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-03 19:36:42,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:42,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720729597] [2023-08-03 19:36:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720729597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:36:42,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776310924] [2023-08-03 19:36:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:42,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:36:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:36:42,929 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:36:42,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-03 19:36:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:43,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:36:43,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:36:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-03 19:36:43,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:36:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-03 19:36:43,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776310924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:36:43,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:36:43,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:36:43,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154357642] [2023-08-03 19:36:43,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:36:43,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:36:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:36:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:36:43,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-03 19:36:43,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 317.2) internal successors, (1586), 5 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:43,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:43,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-03 19:36:43,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:46,443 INFO L124 PetriNetUnfolderBase]: 32143/43381 cut-off events. [2023-08-03 19:36:46,443 INFO L125 PetriNetUnfolderBase]: For 24948/24948 co-relation queries the response was YES. [2023-08-03 19:36:46,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102508 conditions, 43381 events. 32143/43381 cut-off events. For 24948/24948 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 230304 event pairs, 25747 based on Foata normal form. 25/37851 useless extension candidates. Maximal degree in co-relation 102434. Up to 40432 conditions per place. [2023-08-03 19:36:46,751 INFO L140 encePairwiseOnDemand]: 731/735 looper letters, 119 selfloop transitions, 3 changer transitions 2/128 dead transitions. [2023-08-03 19:36:46,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 676 flow [2023-08-03 19:36:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:36:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:36:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1351 transitions. [2023-08-03 19:36:46,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2023-08-03 19:36:46,754 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1351 transitions. [2023-08-03 19:36:46,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1351 transitions. [2023-08-03 19:36:46,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:46,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1351 transitions. [2023-08-03 19:36:46,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.75) internal successors, (1351), 4 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:46,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:46,760 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:46,760 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 312 flow. Second operand 4 states and 1351 transitions. [2023-08-03 19:36:46,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 676 flow [2023-08-03 19:36:47,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 672 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 19:36:47,022 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 316 flow [2023-08-03 19:36:47,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=316, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2023-08-03 19:36:47,023 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2023-08-03 19:36:47,023 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 316 flow [2023-08-03 19:36:47,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.2) internal successors, (1586), 5 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:47,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:47,023 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:47,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-03 19:36:47,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 19:36:47,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:47,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash -5153731, now seen corresponding path program 1 times [2023-08-03 19:36:47,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:47,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322916333] [2023-08-03 19:36:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-08-03 19:36:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:47,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322916333] [2023-08-03 19:36:47,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322916333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:36:47,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:36:47,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 19:36:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847798018] [2023-08-03 19:36:47,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:36:47,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 19:36:47,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 19:36:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 19:36:47,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 735 [2023-08-03 19:36:47,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:47,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:47,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 735 [2023-08-03 19:36:47,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:36:52,575 INFO L124 PetriNetUnfolderBase]: 49916/65479 cut-off events. [2023-08-03 19:36:52,575 INFO L125 PetriNetUnfolderBase]: For 41718/41718 co-relation queries the response was YES. [2023-08-03 19:36:52,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154563 conditions, 65479 events. 49916/65479 cut-off events. For 41718/41718 co-relation queries the response was YES. Maximal size of possible extension queue 1747. Compared 374419 event pairs, 6334 based on Foata normal form. 0/57696 useless extension candidates. Maximal degree in co-relation 154487. Up to 40558 conditions per place. [2023-08-03 19:36:53,198 INFO L140 encePairwiseOnDemand]: 728/735 looper letters, 134 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-08-03 19:36:53,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 144 transitions, 863 flow [2023-08-03 19:36:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:36:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:36:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1358 transitions. [2023-08-03 19:36:53,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-08-03 19:36:53,201 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1358 transitions. [2023-08-03 19:36:53,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1358 transitions. [2023-08-03 19:36:53,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:36:53,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1358 transitions. [2023-08-03 19:36:53,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.5) internal successors, (1358), 4 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:53,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:53,210 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:53,210 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 316 flow. Second operand 4 states and 1358 transitions. [2023-08-03 19:36:53,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 144 transitions, 863 flow [2023-08-03 19:36:53,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 144 transitions, 846 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 19:36:53,346 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 350 flow [2023-08-03 19:36:53,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2023-08-03 19:36:53,347 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2023-08-03 19:36:53,348 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 350 flow [2023-08-03 19:36:53,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:53,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:36:53,349 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:36:53,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-03 19:36:53,356 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:36:53,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:36:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1519840189, now seen corresponding path program 1 times [2023-08-03 19:36:53,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:36:53,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347551095] [2023-08-03 19:36:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:36:53,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:36:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:36:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-03 19:36:53,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:36:53,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347551095] [2023-08-03 19:36:53,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347551095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:36:53,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:36:53,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 19:36:53,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250937387] [2023-08-03 19:36:53,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:36:53,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 19:36:53,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:36:53,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 19:36:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 19:36:53,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 735 [2023-08-03 19:36:53,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:36:53,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:36:53,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 735 [2023-08-03 19:36:53,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:37:01,594 INFO L124 PetriNetUnfolderBase]: 79108/104292 cut-off events. [2023-08-03 19:37:01,594 INFO L125 PetriNetUnfolderBase]: For 64780/64780 co-relation queries the response was YES. [2023-08-03 19:37:02,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262115 conditions, 104292 events. 79108/104292 cut-off events. For 64780/64780 co-relation queries the response was YES. Maximal size of possible extension queue 2499. Compared 603251 event pairs, 22839 based on Foata normal form. 0/95472 useless extension candidates. Maximal degree in co-relation 262036. Up to 63645 conditions per place. [2023-08-03 19:37:02,700 INFO L140 encePairwiseOnDemand]: 728/735 looper letters, 134 selfloop transitions, 8 changer transitions 0/146 dead transitions. [2023-08-03 19:37:02,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 898 flow [2023-08-03 19:37:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:37:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:37:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1353 transitions. [2023-08-03 19:37:02,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602040816326531 [2023-08-03 19:37:02,702 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1353 transitions. [2023-08-03 19:37:02,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1353 transitions. [2023-08-03 19:37:02,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:37:02,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1353 transitions. [2023-08-03 19:37:02,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 338.25) internal successors, (1353), 4 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:02,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:02,706 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:02,706 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 350 flow. Second operand 4 states and 1353 transitions. [2023-08-03 19:37:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 898 flow [2023-08-03 19:37:03,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 146 transitions, 898 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:37:03,807 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 420 flow [2023-08-03 19:37:03,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=420, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2023-08-03 19:37:03,809 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2023-08-03 19:37:03,809 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 420 flow [2023-08-03 19:37:03,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:03,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:37:03,809 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:37:03,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-03 19:37:03,810 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:37:03,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:37:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1724375123, now seen corresponding path program 1 times [2023-08-03 19:37:03,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:37:03,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120994114] [2023-08-03 19:37:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:37:03,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:37:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:37:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-08-03 19:37:04,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:37:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120994114] [2023-08-03 19:37:04,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120994114] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:37:04,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:37:04,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 19:37:04,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086160360] [2023-08-03 19:37:04,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:37:04,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:37:04,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:37:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:37:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:37:04,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 735 [2023-08-03 19:37:04,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:04,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:37:04,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 735 [2023-08-03 19:37:04,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:37:17,764 INFO L124 PetriNetUnfolderBase]: 122763/160776 cut-off events. [2023-08-03 19:37:17,764 INFO L125 PetriNetUnfolderBase]: For 148718/148718 co-relation queries the response was YES. [2023-08-03 19:37:18,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430637 conditions, 160776 events. 122763/160776 cut-off events. For 148718/148718 co-relation queries the response was YES. Maximal size of possible extension queue 3947. Compared 960974 event pairs, 52764 based on Foata normal form. 0/152293 useless extension candidates. Maximal degree in co-relation 430553. Up to 102635 conditions per place. [2023-08-03 19:37:19,208 INFO L140 encePairwiseOnDemand]: 726/735 looper letters, 150 selfloop transitions, 13 changer transitions 0/167 dead transitions. [2023-08-03 19:37:19,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 167 transitions, 1126 flow [2023-08-03 19:37:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:37:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:37:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1662 transitions. [2023-08-03 19:37:19,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45224489795918366 [2023-08-03 19:37:19,211 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1662 transitions. [2023-08-03 19:37:19,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1662 transitions. [2023-08-03 19:37:19,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:37:19,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1662 transitions. [2023-08-03 19:37:19,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 332.4) internal successors, (1662), 5 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:19,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:19,216 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:19,216 INFO L175 Difference]: Start difference. First operand has 96 places, 83 transitions, 420 flow. Second operand 5 states and 1662 transitions. [2023-08-03 19:37:19,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 167 transitions, 1126 flow [2023-08-03 19:37:21,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 167 transitions, 1126 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:37:21,829 INFO L231 Difference]: Finished difference. Result has 104 places, 91 transitions, 536 flow [2023-08-03 19:37:21,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=104, PETRI_TRANSITIONS=91} [2023-08-03 19:37:21,829 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 47 predicate places. [2023-08-03 19:37:21,829 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 91 transitions, 536 flow [2023-08-03 19:37:21,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:21,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:37:21,830 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:37:21,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-03 19:37:21,830 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:37:21,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:37:21,830 INFO L85 PathProgramCache]: Analyzing trace with hash -428615392, now seen corresponding path program 1 times [2023-08-03 19:37:21,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:37:21,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916699258] [2023-08-03 19:37:21,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:37:21,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:37:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:37:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-08-03 19:37:22,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:37:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916699258] [2023-08-03 19:37:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916699258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:37:22,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:37:22,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 19:37:22,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924728150] [2023-08-03 19:37:22,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:37:22,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:37:22,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:37:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:37:22,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:37:22,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 735 [2023-08-03 19:37:22,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 91 transitions, 536 flow. Second operand has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:22,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:37:22,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 735 [2023-08-03 19:37:22,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:37:44,562 INFO L124 PetriNetUnfolderBase]: 190494/247214 cut-off events. [2023-08-03 19:37:44,562 INFO L125 PetriNetUnfolderBase]: For 293025/293025 co-relation queries the response was YES. [2023-08-03 19:37:46,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701097 conditions, 247214 events. 190494/247214 cut-off events. For 293025/293025 co-relation queries the response was YES. Maximal size of possible extension queue 5689. Compared 1547794 event pairs, 46832 based on Foata normal form. 0/241859 useless extension candidates. Maximal degree in co-relation 701007. Up to 158505 conditions per place. [2023-08-03 19:37:47,234 INFO L140 encePairwiseOnDemand]: 726/735 looper letters, 168 selfloop transitions, 16 changer transitions 0/188 dead transitions. [2023-08-03 19:37:47,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 188 transitions, 1384 flow [2023-08-03 19:37:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:37:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:37:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1672 transitions. [2023-08-03 19:37:47,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549659863945578 [2023-08-03 19:37:47,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1672 transitions. [2023-08-03 19:37:47,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1672 transitions. [2023-08-03 19:37:47,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:37:47,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1672 transitions. [2023-08-03 19:37:47,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 334.4) internal successors, (1672), 5 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:47,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:47,242 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 735.0) internal successors, (4410), 6 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:47,242 INFO L175 Difference]: Start difference. First operand has 104 places, 91 transitions, 536 flow. Second operand 5 states and 1672 transitions. [2023-08-03 19:37:47,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 188 transitions, 1384 flow [2023-08-03 19:37:48,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 188 transitions, 1380 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 19:37:48,319 INFO L231 Difference]: Finished difference. Result has 112 places, 99 transitions, 672 flow [2023-08-03 19:37:48,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=672, PETRI_PLACES=112, PETRI_TRANSITIONS=99} [2023-08-03 19:37:48,320 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 55 predicate places. [2023-08-03 19:37:48,320 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 99 transitions, 672 flow [2023-08-03 19:37:48,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:48,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:37:48,321 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:37:48,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-03 19:37:48,321 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:37:48,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:37:48,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2038277408, now seen corresponding path program 1 times [2023-08-03 19:37:48,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:37:48,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303571291] [2023-08-03 19:37:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:37:48,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:37:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:37:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-08-03 19:37:48,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:37:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303571291] [2023-08-03 19:37:48,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303571291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:37:48,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:37:48,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 19:37:48,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427291322] [2023-08-03 19:37:48,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:37:48,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 19:37:48,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:37:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 19:37:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 19:37:48,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-03 19:37:48,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 99 transitions, 672 flow. Second operand has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:37:48,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:37:48,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-03 19:37:48,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:38:33,458 INFO L124 PetriNetUnfolderBase]: 294718/386918 cut-off events. [2023-08-03 19:38:33,458 INFO L125 PetriNetUnfolderBase]: For 518911/518911 co-relation queries the response was YES. [2023-08-03 19:38:36,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1142873 conditions, 386918 events. 294718/386918 cut-off events. For 518911/518911 co-relation queries the response was YES. Maximal size of possible extension queue 8401. Compared 2570296 event pairs, 133297 based on Foata normal form. 1656/388573 useless extension candidates. Maximal degree in co-relation 1142777. Up to 177244 conditions per place. [2023-08-03 19:38:37,880 INFO L140 encePairwiseOnDemand]: 730/735 looper letters, 176 selfloop transitions, 9 changer transitions 10/199 dead transitions. [2023-08-03 19:38:37,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 199 transitions, 1533 flow [2023-08-03 19:38:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:38:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:38:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1381 transitions. [2023-08-03 19:38:37,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697278911564626 [2023-08-03 19:38:37,883 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1381 transitions. [2023-08-03 19:38:37,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1381 transitions. [2023-08-03 19:38:37,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:38:37,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1381 transitions. [2023-08-03 19:38:37,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:38:37,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:38:37,886 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:38:37,886 INFO L175 Difference]: Start difference. First operand has 112 places, 99 transitions, 672 flow. Second operand 4 states and 1381 transitions. [2023-08-03 19:38:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 199 transitions, 1533 flow [2023-08-03 19:38:52,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 199 transitions, 1510 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 19:38:52,395 INFO L231 Difference]: Finished difference. Result has 116 places, 101 transitions, 701 flow [2023-08-03 19:38:52,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=701, PETRI_PLACES=116, PETRI_TRANSITIONS=101} [2023-08-03 19:38:52,396 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2023-08-03 19:38:52,396 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 101 transitions, 701 flow [2023-08-03 19:38:52,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:38:52,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:38:52,396 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:38:52,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-03 19:38:52,396 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:38:52,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:38:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1892862620, now seen corresponding path program 1 times [2023-08-03 19:38:52,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:38:52,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038449611] [2023-08-03 19:38:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:38:52,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:38:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:38:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-08-03 19:38:53,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:38:53,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038449611] [2023-08-03 19:38:53,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038449611] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:38:53,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959429892] [2023-08-03 19:38:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:38:53,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:38:53,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:38:53,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:38:53,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-03 19:38:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:38:54,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 19:38:54,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:38:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-08-03 19:38:54,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:38:54,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959429892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:38:54,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:38:54,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 18 [2023-08-03 19:38:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252067002] [2023-08-03 19:38:54,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:38:54,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 19:38:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:38:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 19:38:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-08-03 19:38:54,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-03 19:38:54,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 101 transitions, 701 flow. Second operand has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:38:54,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:38:54,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-03 19:38:54,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand