/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 05:38:56,370 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 05:38:56,437 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 05:38:56,441 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 05:38:56,442 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 05:38:56,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 05:38:56,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 05:38:56,480 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 05:38:56,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 05:38:56,484 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 05:38:56,485 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 05:38:56,485 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 05:38:56,485 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 05:38:56,486 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 05:38:56,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 05:38:56,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 05:38:56,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 05:38:56,487 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 05:38:56,487 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 05:38:56,487 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 05:38:56,487 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 05:38:56,489 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 05:38:56,489 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 05:38:56,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 05:38:56,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 05:38:56,489 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 05:38:56,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 05:38:56,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 05:38:56,490 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 05:38:56,490 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 05:38:56,490 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 05:38:56,490 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 05:38:56,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 05:38:56,491 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 05:38:56,491 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 05:38:56,491 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 05:38:56,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 05:38:56,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 05:38:56,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 05:38:56,833 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 05:38:56,835 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 05:38:56,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-24 05:38:58,072 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 05:38:58,434 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 05:38:58,435 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-24 05:38:58,462 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3192277b/129ef437c9b447f4ac11e2d11e0e14b9/FLAG0ed7f34ff [2023-08-24 05:38:58,477 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3192277b/129ef437c9b447f4ac11e2d11e0e14b9 [2023-08-24 05:38:58,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 05:38:58,485 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 05:38:58,487 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 05:38:58,487 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 05:38:58,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 05:38:58,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 05:38:58" (1/1) ... [2023-08-24 05:38:58,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f82de81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:58, skipping insertion in model container [2023-08-24 05:38:58,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 05:38:58" (1/1) ... [2023-08-24 05:38:58,552 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 05:38:59,287 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-08-24 05:38:59,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 05:38:59,302 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 05:38:59,316 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [127] [2023-08-24 05:38:59,343 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [573] [2023-08-24 05:38:59,343 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [574] [2023-08-24 05:38:59,380 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-08-24 05:38:59,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 05:38:59,469 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 05:38:59,469 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 05:38:59,475 INFO L206 MainTranslator]: Completed translation [2023-08-24 05:38:59,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59 WrapperNode [2023-08-24 05:38:59,476 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 05:38:59,477 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 05:38:59,477 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 05:38:59,477 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 05:38:59,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,505 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,538 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 286 [2023-08-24 05:38:59,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 05:38:59,539 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 05:38:59,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 05:38:59,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 05:38:59,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,553 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,570 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 05:38:59,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 05:38:59,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 05:38:59,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 05:38:59,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (1/1) ... [2023-08-24 05:38:59,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 05:38:59,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 05:38:59,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 05:38:59,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 05:38:59,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 05:38:59,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 05:38:59,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 05:38:59,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 05:38:59,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 05:38:59,644 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-08-24 05:38:59,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-08-24 05:38:59,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 05:38:59,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 05:38:59,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 05:38:59,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 05:38:59,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 05:38:59,646 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 05:38:59,896 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 05:38:59,898 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 05:39:00,212 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 05:39:00,262 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 05:39:00,262 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-24 05:39:00,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 05:39:00 BoogieIcfgContainer [2023-08-24 05:39:00,265 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 05:39:00,267 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 05:39:00,267 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 05:39:00,269 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 05:39:00,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 05:38:58" (1/3) ... [2023-08-24 05:39:00,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2cc124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 05:39:00, skipping insertion in model container [2023-08-24 05:39:00,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:38:59" (2/3) ... [2023-08-24 05:39:00,271 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2cc124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 05:39:00, skipping insertion in model container [2023-08-24 05:39:00,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 05:39:00" (3/3) ... [2023-08-24 05:39:00,273 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-08-24 05:39:00,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 05:39:00,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 05:39:00,289 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 05:39:00,435 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 05:39:00,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 510 flow [2023-08-24 05:39:00,583 INFO L124 PetriNetUnfolderBase]: 19/265 cut-off events. [2023-08-24 05:39:00,583 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 05:39:00,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 265 events. 19/265 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 424 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 185. Up to 4 conditions per place. [2023-08-24 05:39:00,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 251 transitions, 510 flow [2023-08-24 05:39:00,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 246 transitions, 497 flow [2023-08-24 05:39:00,608 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 05:39:00,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 246 transitions, 497 flow [2023-08-24 05:39:00,618 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 246 transitions, 497 flow [2023-08-24 05:39:00,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 246 transitions, 497 flow [2023-08-24 05:39:00,670 INFO L124 PetriNetUnfolderBase]: 18/260 cut-off events. [2023-08-24 05:39:00,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 05:39:00,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 260 events. 18/260 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 382 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 185. Up to 4 conditions per place. [2023-08-24 05:39:00,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 6640 [2023-08-24 05:39:07,551 INFO L134 LiptonReduction]: Checked pairs total: 6773 [2023-08-24 05:39:07,551 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-08-24 05:39:07,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 05:39:07,568 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@553904bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 05:39:07,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 05:39:07,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 05:39:07,571 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-24 05:39:07,571 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 05:39:07,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:39:07,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-24 05:39:07,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 05:39:07,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:39:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash 885226404, now seen corresponding path program 1 times [2023-08-24 05:39:07,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:39:07,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755641188] [2023-08-24 05:39:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:39:07,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:39:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:39:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 05:39:07,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:39:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755641188] [2023-08-24 05:39:07,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755641188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:39:07,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:39:07,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 05:39:07,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637884831] [2023-08-24 05:39:07,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:39:07,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 05:39:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:39:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 05:39:08,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 05:39:08,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 495 [2023-08-24 05:39:08,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:39:08,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 495 [2023-08-24 05:39:08,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:39:08,117 INFO L124 PetriNetUnfolderBase]: 82/168 cut-off events. [2023-08-24 05:39:08,117 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 05:39:08,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 168 events. 82/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 456 event pairs, 57 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2023-08-24 05:39:08,120 INFO L140 encePairwiseOnDemand]: 488/495 looper letters, 30 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-08-24 05:39:08,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 139 flow [2023-08-24 05:39:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 05:39:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 05:39:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 704 transitions. [2023-08-24 05:39:08,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2023-08-24 05:39:08,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 704 transitions. [2023-08-24 05:39:08,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 704 transitions. [2023-08-24 05:39:08,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:39:08,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 704 transitions. [2023-08-24 05:39:08,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,163 INFO L175 Difference]: Start difference. First operand has 30 places, 37 transitions, 79 flow. Second operand 3 states and 704 transitions. [2023-08-24 05:39:08,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 139 flow [2023-08-24 05:39:08,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 05:39:08,168 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 81 flow [2023-08-24 05:39:08,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-08-24 05:39:08,172 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-24 05:39:08,173 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 81 flow [2023-08-24 05:39:08,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:39:08,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 05:39:08,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 05:39:08,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 05:39:08,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:39:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -669233556, now seen corresponding path program 1 times [2023-08-24 05:39:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:39:08,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766491583] [2023-08-24 05:39:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:39:08,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:39:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:39:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 05:39:08,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:39:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766491583] [2023-08-24 05:39:08,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766491583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 05:39:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041882682] [2023-08-24 05:39:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:39:08,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 05:39:08,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 05:39:08,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 05:39:08,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 05:39:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:39:08,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 05:39:08,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 05:39:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 05:39:08,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 05:39:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 05:39:08,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041882682] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 05:39:08,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 05:39:08,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-24 05:39:08,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264753424] [2023-08-24 05:39:08,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 05:39:08,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 05:39:08,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:39:08,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 05:39:08,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-24 05:39:08,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 495 [2023-08-24 05:39:08,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 81 flow. Second operand has 8 states, 8 states have (on average 223.5) internal successors, (1788), 8 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:39:08,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 495 [2023-08-24 05:39:08,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:39:08,795 INFO L124 PetriNetUnfolderBase]: 57/123 cut-off events. [2023-08-24 05:39:08,795 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 05:39:08,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 123 events. 57/123 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 286 event pairs, 38 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 247. Up to 121 conditions per place. [2023-08-24 05:39:08,797 INFO L140 encePairwiseOnDemand]: 492/495 looper letters, 30 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-08-24 05:39:08,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 151 flow [2023-08-24 05:39:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 05:39:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 05:39:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 922 transitions. [2023-08-24 05:39:08,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46565656565656566 [2023-08-24 05:39:08,801 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 922 transitions. [2023-08-24 05:39:08,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 922 transitions. [2023-08-24 05:39:08,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:39:08,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 922 transitions. [2023-08-24 05:39:08,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,818 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 81 flow. Second operand 4 states and 922 transitions. [2023-08-24 05:39:08,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 151 flow [2023-08-24 05:39:08,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 147 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 05:39:08,820 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 93 flow [2023-08-24 05:39:08,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-08-24 05:39:08,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-24 05:39:08,821 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 93 flow [2023-08-24 05:39:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 223.5) internal successors, (1788), 8 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:08,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:39:08,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-24 05:39:08,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 05:39:09,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 05:39:09,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 05:39:09,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:39:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1612852060, now seen corresponding path program 2 times [2023-08-24 05:39:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:39:09,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080645014] [2023-08-24 05:39:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:39:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:39:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 05:39:09,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 05:39:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 05:39:09,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 05:39:09,122 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 05:39:09,123 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 05:39:09,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 05:39:09,125 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-24 05:39:09,129 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 05:39:09,130 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 05:39:09,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 05:39:09,202 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 05:39:09,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 419 transitions, 856 flow [2023-08-24 05:39:09,295 INFO L124 PetriNetUnfolderBase]: 36/469 cut-off events. [2023-08-24 05:39:09,295 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 05:39:09,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 469 events. 36/469 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1473 event pairs, 0 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 364. Up to 8 conditions per place. [2023-08-24 05:39:09,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 394 places, 419 transitions, 856 flow [2023-08-24 05:39:09,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 419 transitions, 856 flow [2023-08-24 05:39:09,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 05:39:09,308 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 394 places, 419 transitions, 856 flow [2023-08-24 05:39:09,308 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 394 places, 419 transitions, 856 flow [2023-08-24 05:39:09,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 419 transitions, 856 flow [2023-08-24 05:39:09,382 INFO L124 PetriNetUnfolderBase]: 36/469 cut-off events. [2023-08-24 05:39:09,382 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 05:39:09,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 469 events. 36/469 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1473 event pairs, 0 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 364. Up to 8 conditions per place. [2023-08-24 05:39:09,416 INFO L119 LiptonReduction]: Number of co-enabled transitions 72044 [2023-08-24 05:39:18,618 INFO L134 LiptonReduction]: Checked pairs total: 79927 [2023-08-24 05:39:18,618 INFO L136 LiptonReduction]: Total number of compositions: 399 [2023-08-24 05:39:18,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 05:39:18,621 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@553904bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 05:39:18,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 05:39:18,625 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 05:39:18,625 INFO L124 PetriNetUnfolderBase]: 7/49 cut-off events. [2023-08-24 05:39:18,625 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 05:39:18,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:39:18,626 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 05:39:18,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 05:39:18,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:39:18,626 INFO L85 PathProgramCache]: Analyzing trace with hash -138826694, now seen corresponding path program 1 times [2023-08-24 05:39:18,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:39:18,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243736737] [2023-08-24 05:39:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:39:18,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:39:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:39:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 05:39:18,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:39:18,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243736737] [2023-08-24 05:39:18,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243736737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:39:18,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:39:18,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 05:39:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543206762] [2023-08-24 05:39:18,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:39:18,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 05:39:18,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:39:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 05:39:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 05:39:18,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 818 [2023-08-24 05:39:18,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 83 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:18,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:39:18,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 818 [2023-08-24 05:39:18,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:39:20,029 INFO L124 PetriNetUnfolderBase]: 9043/13269 cut-off events. [2023-08-24 05:39:20,029 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2023-08-24 05:39:20,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26643 conditions, 13269 events. 9043/13269 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 71855 event pairs, 7113 based on Foata normal form. 0/9669 useless extension candidates. Maximal degree in co-relation 21560. Up to 13230 conditions per place. [2023-08-24 05:39:20,080 INFO L140 encePairwiseOnDemand]: 809/818 looper letters, 67 selfloop transitions, 2 changer transitions 7/78 dead transitions. [2023-08-24 05:39:20,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 324 flow [2023-08-24 05:39:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 05:39:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 05:39:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1207 transitions. [2023-08-24 05:39:20,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49185004074979627 [2023-08-24 05:39:20,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1207 transitions. [2023-08-24 05:39:20,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1207 transitions. [2023-08-24 05:39:20,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:39:20,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1207 transitions. [2023-08-24 05:39:20,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 402.3333333333333) internal successors, (1207), 3 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:20,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:20,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:20,093 INFO L175 Difference]: Start difference. First operand has 67 places, 83 transitions, 184 flow. Second operand 3 states and 1207 transitions. [2023-08-24 05:39:20,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 324 flow [2023-08-24 05:39:20,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 78 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 05:39:20,099 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 164 flow [2023-08-24 05:39:20,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2023-08-24 05:39:20,101 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-24 05:39:20,101 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 164 flow [2023-08-24 05:39:20,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:20,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:39:20,102 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-24 05:39:20,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 05:39:20,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 05:39:20,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:39:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1565482280, now seen corresponding path program 1 times [2023-08-24 05:39:20,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:39:20,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572142842] [2023-08-24 05:39:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:39:20,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:39:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:39:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 05:39:20,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:39:20,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572142842] [2023-08-24 05:39:20,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572142842] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 05:39:20,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175252779] [2023-08-24 05:39:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:39:20,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 05:39:20,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 05:39:20,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 05:39:20,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 05:39:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:39:20,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 05:39:20,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 05:39:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 05:39:20,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 05:39:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 05:39:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175252779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 05:39:20,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 05:39:20,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 05:39:20,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250160242] [2023-08-24 05:39:20,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 05:39:20,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 05:39:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:39:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 05:39:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-24 05:39:20,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 818 [2023-08-24 05:39:20,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 376.7142857142857) internal successors, (2637), 7 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:20,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:39:20,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 818 [2023-08-24 05:39:20,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:39:21,080 INFO L124 PetriNetUnfolderBase]: 4107/6148 cut-off events. [2023-08-24 05:39:21,081 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-08-24 05:39:21,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12384 conditions, 6148 events. 4107/6148 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 31168 event pairs, 3170 based on Foata normal form. 0/5055 useless extension candidates. Maximal degree in co-relation 12371. Up to 6136 conditions per place. [2023-08-24 05:39:21,123 INFO L140 encePairwiseOnDemand]: 815/818 looper letters, 67 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-24 05:39:21,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 308 flow [2023-08-24 05:39:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 05:39:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 05:39:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1571 transitions. [2023-08-24 05:39:21,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48013447432762835 [2023-08-24 05:39:21,128 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1571 transitions. [2023-08-24 05:39:21,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1571 transitions. [2023-08-24 05:39:21,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:39:21,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1571 transitions. [2023-08-24 05:39:21,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 392.75) internal successors, (1571), 4 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:21,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:21,140 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:21,140 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 164 flow. Second operand 4 states and 1571 transitions. [2023-08-24 05:39:21,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 308 flow [2023-08-24 05:39:21,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 72 transitions, 302 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 05:39:21,143 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 174 flow [2023-08-24 05:39:21,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2023-08-24 05:39:21,144 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2023-08-24 05:39:21,145 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 174 flow [2023-08-24 05:39:21,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 376.7142857142857) internal successors, (2637), 7 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:21,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:39:21,147 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 05:39:21,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 05:39:21,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 05:39:21,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 05:39:21,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:39:21,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1452834810, now seen corresponding path program 2 times [2023-08-24 05:39:21,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:39:21,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107948701] [2023-08-24 05:39:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:39:21,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:39:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 05:39:21,393 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 05:39:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 05:39:21,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 05:39:21,432 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 05:39:21,432 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 05:39:21,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 05:39:21,432 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-24 05:39:21,433 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 05:39:21,433 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 05:39:21,433 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 05:39:21,558 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 05:39:21,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 587 transitions, 1204 flow [2023-08-24 05:39:21,704 INFO L124 PetriNetUnfolderBase]: 58/700 cut-off events. [2023-08-24 05:39:21,704 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 05:39:21,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 700 events. 58/700 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2972 event pairs, 1 based on Foata normal form. 0/635 useless extension candidates. Maximal degree in co-relation 558. Up to 16 conditions per place. [2023-08-24 05:39:21,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 551 places, 587 transitions, 1204 flow [2023-08-24 05:39:21,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 551 places, 587 transitions, 1204 flow [2023-08-24 05:39:21,734 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 05:39:21,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 551 places, 587 transitions, 1204 flow [2023-08-24 05:39:21,734 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 551 places, 587 transitions, 1204 flow [2023-08-24 05:39:21,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 587 transitions, 1204 flow [2023-08-24 05:39:21,866 INFO L124 PetriNetUnfolderBase]: 58/700 cut-off events. [2023-08-24 05:39:21,866 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 05:39:21,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 700 events. 58/700 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2972 event pairs, 1 based on Foata normal form. 0/635 useless extension candidates. Maximal degree in co-relation 558. Up to 16 conditions per place. [2023-08-24 05:39:21,938 INFO L119 LiptonReduction]: Number of co-enabled transitions 192228 [2023-08-24 05:39:34,840 INFO L134 LiptonReduction]: Checked pairs total: 216982 [2023-08-24 05:39:34,840 INFO L136 LiptonReduction]: Total number of compositions: 559 [2023-08-24 05:39:34,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 05:39:34,842 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@553904bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 05:39:34,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 05:39:34,851 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 05:39:34,851 INFO L124 PetriNetUnfolderBase]: 17/94 cut-off events. [2023-08-24 05:39:34,851 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 05:39:34,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:39:34,851 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 05:39:34,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 05:39:34,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:39:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1795761680, now seen corresponding path program 1 times [2023-08-24 05:39:34,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:39:34,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771030612] [2023-08-24 05:39:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:39:34,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:39:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:39:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 05:39:34,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:39:34,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771030612] [2023-08-24 05:39:34,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771030612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:39:34,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:39:34,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 05:39:34,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507643125] [2023-08-24 05:39:34,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:39:34,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 05:39:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:39:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 05:39:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 05:39:34,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 1146 [2023-08-24 05:39:34,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 118 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 530.3333333333334) internal successors, (1591), 3 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:39:34,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:39:34,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 1146 [2023-08-24 05:39:34,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:40:06,069 INFO L124 PetriNetUnfolderBase]: 358125/466407 cut-off events. [2023-08-24 05:40:06,069 INFO L125 PetriNetUnfolderBase]: For 9780/9780 co-relation queries the response was YES. [2023-08-24 05:40:06,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936866 conditions, 466407 events. 358125/466407 cut-off events. For 9780/9780 co-relation queries the response was YES. Maximal size of possible extension queue 7747. Compared 2934848 event pairs, 283483 based on Foata normal form. 0/344990 useless extension candidates. Maximal degree in co-relation 203666. Up to 465587 conditions per place. [2023-08-24 05:40:07,680 INFO L140 encePairwiseOnDemand]: 1134/1146 looper letters, 98 selfloop transitions, 2 changer transitions 8/110 dead transitions. [2023-08-24 05:40:07,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 110 transitions, 464 flow [2023-08-24 05:40:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 05:40:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 05:40:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1701 transitions. [2023-08-24 05:40:07,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49476439790575916 [2023-08-24 05:40:07,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1701 transitions. [2023-08-24 05:40:07,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1701 transitions. [2023-08-24 05:40:07,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:40:07,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1701 transitions. [2023-08-24 05:40:07,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 567.0) internal successors, (1701), 3 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:07,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1146.0) internal successors, (4584), 4 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:07,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1146.0) internal successors, (4584), 4 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:07,698 INFO L175 Difference]: Start difference. First operand has 94 places, 118 transitions, 266 flow. Second operand 3 states and 1701 transitions. [2023-08-24 05:40:07,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 110 transitions, 464 flow [2023-08-24 05:40:07,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 05:40:07,706 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 235 flow [2023-08-24 05:40:07,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1146, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2023-08-24 05:40:07,707 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 3 predicate places. [2023-08-24 05:40:07,707 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 235 flow [2023-08-24 05:40:07,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.3333333333334) internal successors, (1591), 3 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:07,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:40:07,708 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:40:07,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 05:40:07,709 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 05:40:07,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:40:07,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1159578007, now seen corresponding path program 1 times [2023-08-24 05:40:07,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:40:07,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050994171] [2023-08-24 05:40:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:40:07,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:40:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:40:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 05:40:07,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:40:07,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050994171] [2023-08-24 05:40:07,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050994171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 05:40:07,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895361725] [2023-08-24 05:40:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:40:07,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 05:40:07,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 05:40:07,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 05:40:07,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 05:40:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:40:07,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 05:40:07,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 05:40:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 05:40:08,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 05:40:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 05:40:08,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895361725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 05:40:08,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 05:40:08,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-24 05:40:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415929156] [2023-08-24 05:40:08,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 05:40:08,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 05:40:08,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:40:08,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 05:40:08,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-24 05:40:08,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 1146 [2023-08-24 05:40:08,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 235 flow. Second operand has 8 states, 8 states have (on average 529.75) internal successors, (4238), 8 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:08,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:40:08,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 1146 [2023-08-24 05:40:08,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:40:22,085 INFO L124 PetriNetUnfolderBase]: 163467/214318 cut-off events. [2023-08-24 05:40:22,085 INFO L125 PetriNetUnfolderBase]: For 4018/4018 co-relation queries the response was YES. [2023-08-24 05:40:22,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431290 conditions, 214318 events. 163467/214318 cut-off events. For 4018/4018 co-relation queries the response was YES. Maximal size of possible extension queue 4135. Compared 1290316 event pairs, 127898 based on Foata normal form. 0/172820 useless extension candidates. Maximal degree in co-relation 431276. Up to 214171 conditions per place. [2023-08-24 05:40:22,959 INFO L140 encePairwiseOnDemand]: 1143/1146 looper letters, 98 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2023-08-24 05:40:22,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 103 transitions, 441 flow [2023-08-24 05:40:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 05:40:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 05:40:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2214 transitions. [2023-08-24 05:40:22,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829842931937173 [2023-08-24 05:40:22,965 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2214 transitions. [2023-08-24 05:40:22,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2214 transitions. [2023-08-24 05:40:22,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:40:22,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2214 transitions. [2023-08-24 05:40:22,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 553.5) internal successors, (2214), 4 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:22,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1146.0) internal successors, (5730), 5 states have internal predecessors, (5730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:22,977 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1146.0) internal successors, (5730), 5 states have internal predecessors, (5730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:22,977 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 235 flow. Second operand 4 states and 2214 transitions. [2023-08-24 05:40:22,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 103 transitions, 441 flow [2023-08-24 05:40:22,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 103 transitions, 431 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 05:40:22,982 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 241 flow [2023-08-24 05:40:22,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1146, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2023-08-24 05:40:22,983 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2023-08-24 05:40:22,983 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 241 flow [2023-08-24 05:40:22,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 529.75) internal successors, (4238), 8 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:22,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:40:22,985 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-08-24 05:40:22,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 05:40:23,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 05:40:23,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 05:40:23,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:40:23,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1714172208, now seen corresponding path program 2 times [2023-08-24 05:40:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:40:23,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895981474] [2023-08-24 05:40:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:40:23,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:40:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:40:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 05:40:23,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:40:23,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895981474] [2023-08-24 05:40:23,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895981474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 05:40:23,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112455771] [2023-08-24 05:40:23,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 05:40:23,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 05:40:23,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 05:40:23,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 05:40:23,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 05:40:23,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 05:40:23,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 05:40:23,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 05:40:23,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 05:40:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 05:40:23,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 05:40:23,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112455771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:40:23,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 05:40:23,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-08-24 05:40:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108416348] [2023-08-24 05:40:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:40:23,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 05:40:23,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:40:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 05:40:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-24 05:40:23,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 1146 [2023-08-24 05:40:23,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 527.1666666666666) internal successors, (3163), 6 states have internal predecessors, (3163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:23,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:40:23,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 1146 [2023-08-24 05:40:23,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:40:32,795 INFO L124 PetriNetUnfolderBase]: 105092/140198 cut-off events. [2023-08-24 05:40:32,796 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-08-24 05:40:33,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281715 conditions, 140198 events. 105092/140198 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 3100. Compared 830132 event pairs, 0 based on Foata normal form. 16250/128425 useless extension candidates. Maximal degree in co-relation 281695. Up to 74625 conditions per place. [2023-08-24 05:40:33,104 INFO L140 encePairwiseOnDemand]: 1143/1146 looper letters, 0 selfloop transitions, 0 changer transitions 287/287 dead transitions. [2023-08-24 05:40:33,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 287 transitions, 1179 flow [2023-08-24 05:40:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 05:40:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 05:40:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3435 transitions. [2023-08-24 05:40:33,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49956369982547993 [2023-08-24 05:40:33,267 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3435 transitions. [2023-08-24 05:40:33,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3435 transitions. [2023-08-24 05:40:33,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:40:33,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3435 transitions. [2023-08-24 05:40:33,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 572.5) internal successors, (3435), 6 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:33,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1146.0) internal successors, (8022), 7 states have internal predecessors, (8022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:33,298 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1146.0) internal successors, (8022), 7 states have internal predecessors, (8022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:33,298 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 241 flow. Second operand 6 states and 3435 transitions. [2023-08-24 05:40:33,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 287 transitions, 1179 flow [2023-08-24 05:40:33,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 287 transitions, 1170 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 05:40:33,400 INFO L231 Difference]: Finished difference. Result has 96 places, 0 transitions, 0 flow [2023-08-24 05:40:33,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1146, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=96, PETRI_TRANSITIONS=0} [2023-08-24 05:40:33,401 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 2 predicate places. [2023-08-24 05:40:33,401 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 0 transitions, 0 flow [2023-08-24 05:40:33,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 527.1666666666666) internal successors, (3163), 6 states have internal predecessors, (3163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:33,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 05:40:33,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 05:40:33,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 05:40:33,607 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-24 05:40:33,608 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-24 05:40:33,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 587 transitions, 1204 flow [2023-08-24 05:40:33,720 INFO L124 PetriNetUnfolderBase]: 58/700 cut-off events. [2023-08-24 05:40:33,720 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 05:40:33,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 700 events. 58/700 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2972 event pairs, 1 based on Foata normal form. 0/635 useless extension candidates. Maximal degree in co-relation 558. Up to 16 conditions per place. [2023-08-24 05:40:33,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 551 places, 587 transitions, 1204 flow [2023-08-24 05:40:33,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 551 places, 587 transitions, 1204 flow [2023-08-24 05:40:33,737 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 05:40:33,737 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 551 places, 587 transitions, 1204 flow [2023-08-24 05:40:33,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 551 places, 587 transitions, 1204 flow [2023-08-24 05:40:33,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 587 transitions, 1204 flow [2023-08-24 05:40:33,831 INFO L124 PetriNetUnfolderBase]: 58/700 cut-off events. [2023-08-24 05:40:33,831 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 05:40:33,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 700 events. 58/700 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2972 event pairs, 1 based on Foata normal form. 0/635 useless extension candidates. Maximal degree in co-relation 558. Up to 16 conditions per place. [2023-08-24 05:40:33,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 192228 [2023-08-24 05:40:45,637 INFO L134 LiptonReduction]: Checked pairs total: 207116 [2023-08-24 05:40:45,637 INFO L136 LiptonReduction]: Total number of compositions: 562 [2023-08-24 05:40:45,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 05:40:45,639 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@553904bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 05:40:45,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 05:40:45,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 05:40:45,642 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-24 05:40:45,642 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 05:40:45,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:40:45,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:40:45,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 05:40:45,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:40:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash 510905345, now seen corresponding path program 1 times [2023-08-24 05:40:45,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:40:45,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761194784] [2023-08-24 05:40:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:40:45,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:40:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:40:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 05:40:45,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:40:45,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761194784] [2023-08-24 05:40:45,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761194784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:40:45,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:40:45,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 05:40:45,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218380338] [2023-08-24 05:40:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:40:45,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 05:40:45,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:40:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 05:40:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 05:40:45,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 1149 [2023-08-24 05:40:45,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 118 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:40:45,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:40:45,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 1149 [2023-08-24 05:40:45,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:41:15,557 INFO L124 PetriNetUnfolderBase]: 358319/466725 cut-off events. [2023-08-24 05:41:15,557 INFO L125 PetriNetUnfolderBase]: For 9931/9931 co-relation queries the response was YES. [2023-08-24 05:41:16,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937559 conditions, 466725 events. 358319/466725 cut-off events. For 9931/9931 co-relation queries the response was YES. Maximal size of possible extension queue 7778. Compared 2939328 event pairs, 283632 based on Foata normal form. 0/345258 useless extension candidates. Maximal degree in co-relation 223359. Up to 465859 conditions per place. [2023-08-24 05:41:18,535 INFO L140 encePairwiseOnDemand]: 1138/1149 looper letters, 105 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-24 05:41:18,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 110 transitions, 464 flow [2023-08-24 05:41:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 05:41:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 05:41:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1700 transitions. [2023-08-24 05:41:18,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49318247751668115 [2023-08-24 05:41:18,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1700 transitions. [2023-08-24 05:41:18,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1700 transitions. [2023-08-24 05:41:18,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:41:18,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1700 transitions. [2023-08-24 05:41:18,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 566.6666666666666) internal successors, (1700), 3 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:41:18,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1149.0) internal successors, (4596), 4 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:41:18,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1149.0) internal successors, (4596), 4 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:41:18,549 INFO L175 Difference]: Start difference. First operand has 95 places, 118 transitions, 266 flow. Second operand 3 states and 1700 transitions. [2023-08-24 05:41:18,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 110 transitions, 464 flow [2023-08-24 05:41:18,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 05:41:18,554 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 260 flow [2023-08-24 05:41:18,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1149, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2023-08-24 05:41:18,556 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 2 predicate places. [2023-08-24 05:41:18,556 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 260 flow [2023-08-24 05:41:18,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.6666666666666) internal successors, (1592), 3 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:41:18,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:41:18,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:41:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 05:41:18,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 05:41:18,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:41:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash -38348675, now seen corresponding path program 1 times [2023-08-24 05:41:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:41:18,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382975] [2023-08-24 05:41:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:41:18,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:41:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:41:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 05:41:18,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:41:18,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382975] [2023-08-24 05:41:18,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:41:18,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:41:18,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 05:41:18,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914896019] [2023-08-24 05:41:18,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:41:18,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 05:41:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:41:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 05:41:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 05:41:18,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1149 [2023-08-24 05:41:18,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 535.6666666666666) internal successors, (1607), 3 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:41:18,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:41:18,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1149 [2023-08-24 05:41:18,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:42:04,569 INFO L124 PetriNetUnfolderBase]: 523583/680121 cut-off events. [2023-08-24 05:42:04,569 INFO L125 PetriNetUnfolderBase]: For 13720/13720 co-relation queries the response was YES. [2023-08-24 05:42:05,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366395 conditions, 680121 events. 523583/680121 cut-off events. For 13720/13720 co-relation queries the response was YES. Maximal size of possible extension queue 9542. Compared 4428988 event pairs, 283632 based on Foata normal form. 0/504510 useless extension candidates. Maximal degree in co-relation 1366381. Up to 461828 conditions per place. [2023-08-24 05:42:07,950 INFO L140 encePairwiseOnDemand]: 1145/1149 looper letters, 189 selfloop transitions, 3 changer transitions 0/195 dead transitions. [2023-08-24 05:42:07,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 195 transitions, 832 flow [2023-08-24 05:42:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 05:42:07,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 05:42:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1788 transitions. [2023-08-24 05:42:07,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187119234116623 [2023-08-24 05:42:07,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1788 transitions. [2023-08-24 05:42:07,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1788 transitions. [2023-08-24 05:42:07,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:42:07,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1788 transitions. [2023-08-24 05:42:07,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 596.0) internal successors, (1788), 3 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:42:07,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1149.0) internal successors, (4596), 4 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:42:07,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1149.0) internal successors, (4596), 4 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:42:07,963 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 260 flow. Second operand 3 states and 1788 transitions. [2023-08-24 05:42:07,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 195 transitions, 832 flow [2023-08-24 05:42:07,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 195 transitions, 828 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 05:42:07,968 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 282 flow [2023-08-24 05:42:07,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1149, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2023-08-24 05:42:07,969 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 5 predicate places. [2023-08-24 05:42:07,969 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 282 flow [2023-08-24 05:42:07,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 535.6666666666666) internal successors, (1607), 3 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:42:07,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:42:07,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:42:07,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 05:42:07,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 05:42:07,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:42:07,971 INFO L85 PathProgramCache]: Analyzing trace with hash -675020902, now seen corresponding path program 1 times [2023-08-24 05:42:07,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:42:07,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059749230] [2023-08-24 05:42:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:42:07,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:42:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:42:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 05:42:08,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:42:08,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059749230] [2023-08-24 05:42:08,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059749230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:42:08,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:42:08,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 05:42:08,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060944594] [2023-08-24 05:42:08,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:42:08,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 05:42:08,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:42:08,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 05:42:08,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 05:42:08,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 1149 [2023-08-24 05:42:08,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 454.3333333333333) internal successors, (1363), 3 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:42:08,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:42:08,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 1149 [2023-08-24 05:42:08,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand