/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:22:56,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:22:56,489 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-SemanticLbe.epf [2023-11-17 11:22:56,518 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:22:56,518 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:22:56,519 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:22:56,519 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:22:56,519 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:22:56,520 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:22:56,522 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:22:56,523 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:22:56,523 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:22:56,523 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:22:56,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:22:56,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:22:56,524 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:22:56,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:22:56,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:22:56,525 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:22:56,525 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:22:56,525 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:22:56,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:22:56,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:22:56,526 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:22:56,526 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:22:56,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:56,527 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:22:56,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:22:56,527 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:22:56,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:22:56,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:22:56,528 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:22:56,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:22:56,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:22:56,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:22:56,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:22:56,741 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:22:56,742 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:22:56,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-11-17 11:22:57,728 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:22:57,972 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:22:57,975 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2023-11-17 11:22:57,985 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcc83a61d/9d606edb891d4be083513b9e5897e17a/FLAG4e1b2fbd1 [2023-11-17 11:22:58,001 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcc83a61d/9d606edb891d4be083513b9e5897e17a [2023-11-17 11:22:58,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:22:58,004 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:22:58,005 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:58,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:22:58,008 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:22:58,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749c5f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58, skipping insertion in model container [2023-11-17 11:22:58,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,058 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:22:58,219 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 11:22:58,339 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-ext/46_monabsex2_vs.i[30494,30507] [2023-11-17 11:22:58,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:58,359 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:22:58,378 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 11:22:58,401 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-ext/46_monabsex2_vs.i[30494,30507] [2023-11-17 11:22:58,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:58,429 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:22:58,429 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:22:58,430 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:22:58,435 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:22:58,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58 WrapperNode [2023-11-17 11:22:58,436 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:58,437 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:58,437 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:22:58,437 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:22:58,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,464 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,478 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2023-11-17 11:22:58,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:58,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:22:58,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:22:58,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:22:58,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,501 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,503 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,505 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,505 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:22:58,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:22:58,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:22:58,515 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:22:58,515 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (1/1) ... [2023-11-17 11:22:58,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:58,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:22:58,558 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) [2023-11-17 11:22:58,563 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 [2023-11-17 11:22:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:22:58,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:22:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:22:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:22:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:22:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:22:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:22:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:22:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:22:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:22:58,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:22:58,587 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:22:58,681 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:22:58,683 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:22:58,762 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:22:58,807 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:22:58,808 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 11:22:58,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:58 BoogieIcfgContainer [2023-11-17 11:22:58,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:22:58,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:22:58,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:22:58,813 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:22:58,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:22:58" (1/3) ... [2023-11-17 11:22:58,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369ba2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:58, skipping insertion in model container [2023-11-17 11:22:58,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:58" (2/3) ... [2023-11-17 11:22:58,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369ba2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:58, skipping insertion in model container [2023-11-17 11:22:58,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:58" (3/3) ... [2023-11-17 11:22:58,815 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2023-11-17 11:22:58,828 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:22:58,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:22:58,828 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:22:58,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:58,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 15 places, 13 transitions, 30 flow [2023-11-17 11:22:58,889 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-11-17 11:22:58,889 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:58,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 15 events. 1/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 10. Up to 2 conditions per place. [2023-11-17 11:22:58,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 15 places, 13 transitions, 30 flow [2023-11-17 11:22:58,894 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 13 transitions, 30 flow [2023-11-17 11:22:58,897 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:58,905 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 13 transitions, 30 flow [2023-11-17 11:22:58,907 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 13 transitions, 30 flow [2023-11-17 11:22:58,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 15 places, 13 transitions, 30 flow [2023-11-17 11:22:58,912 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-11-17 11:22:58,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:58,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 15 events. 1/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 10. Up to 2 conditions per place. [2023-11-17 11:22:58,912 INFO L119 LiptonReduction]: Number of co-enabled transitions 56 [2023-11-17 11:22:59,173 INFO L134 LiptonReduction]: Checked pairs total: 56 [2023-11-17 11:22:59,173 INFO L136 LiptonReduction]: Total number of compositions: 7 [2023-11-17 11:22:59,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:59,209 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=LoopHeads, 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;@8473e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:59,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:22:59,211 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:59,211 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:22:59,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:59,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:59,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:59,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:22:59,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash 3631011, now seen corresponding path program 1 times [2023-11-17 11:22:59,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:59,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208871798] [2023-11-17 11:22:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:59,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:59,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:59,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208871798] [2023-11-17 11:22:59,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208871798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:59,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:59,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:59,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270288730] [2023-11-17 11:22:59,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:59,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:59,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:59,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:59,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 11:22:59,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:59,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 11:22:59,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:59,502 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:22:59,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:59,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 6 conditions per place. [2023-11-17 11:22:59,503 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 5 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2023-11-17 11:22:59,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-17 11:22:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 19 transitions. [2023-11-17 11:22:59,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31666666666666665 [2023-11-17 11:22:59,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 19 transitions. [2023-11-17 11:22:59,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 19 transitions. [2023-11-17 11:22:59,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:59,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 19 transitions. [2023-11-17 11:22:59,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,519 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 3 states and 19 transitions. [2023-11-17 11:22:59,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-17 11:22:59,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:59,521 INFO L231 Difference]: Finished difference. Result has 11 places, 6 transitions, 20 flow [2023-11-17 11:22:59,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=6} [2023-11-17 11:22:59,525 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, 0 predicate places. [2023-11-17 11:22:59,525 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 6 transitions, 20 flow [2023-11-17 11:22:59,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:59,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:22:59,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:22:59,526 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:22:59,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:59,526 INFO L85 PathProgramCache]: Analyzing trace with hash -805577374, now seen corresponding path program 1 times [2023-11-17 11:22:59,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:59,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850915514] [2023-11-17 11:22:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:59,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:59,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:59,584 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:59,584 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:59,585 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:22:59,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:22:59,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:22:59,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:22:59,587 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:59,589 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:59,589 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:22:59,601 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:59,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 21 transitions, 52 flow [2023-11-17 11:22:59,606 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-11-17 11:22:59,606 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:59,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 26 events. 2/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 47 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 3 conditions per place. [2023-11-17 11:22:59,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 21 transitions, 52 flow [2023-11-17 11:22:59,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 21 transitions, 52 flow [2023-11-17 11:22:59,607 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:59,607 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 21 transitions, 52 flow [2023-11-17 11:22:59,607 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 21 transitions, 52 flow [2023-11-17 11:22:59,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 21 transitions, 52 flow [2023-11-17 11:22:59,611 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-11-17 11:22:59,611 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:59,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 26 events. 2/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 47 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 3 conditions per place. [2023-11-17 11:22:59,611 INFO L119 LiptonReduction]: Number of co-enabled transitions 224 [2023-11-17 11:22:59,789 INFO L134 LiptonReduction]: Checked pairs total: 598 [2023-11-17 11:22:59,789 INFO L136 LiptonReduction]: Total number of compositions: 12 [2023-11-17 11:22:59,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:59,792 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=LoopHeads, 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;@8473e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:59,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:22:59,793 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:59,793 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 11:22:59,794 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:59,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:59,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:59,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:22:59,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash 4493191, now seen corresponding path program 1 times [2023-11-17 11:22:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:59,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012451457] [2023-11-17 11:22:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:59,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:59,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:59,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012451457] [2023-11-17 11:22:59,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012451457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:59,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:59,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:59,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384672683] [2023-11-17 11:22:59,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:59,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:59,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:59,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:59,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2023-11-17 11:22:59,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:59,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2023-11-17 11:22:59,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:59,904 INFO L124 PetriNetUnfolderBase]: 38/93 cut-off events. [2023-11-17 11:22:59,904 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-17 11:22:59,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 93 events. 38/93 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 293 event pairs, 12 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 80. Up to 51 conditions per place. [2023-11-17 11:22:59,905 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 15 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-11-17 11:22:59,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 93 flow [2023-11-17 11:22:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2023-11-17 11:22:59,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2023-11-17 11:22:59,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 41 transitions. [2023-11-17 11:22:59,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 41 transitions. [2023-11-17 11:22:59,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:59,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 41 transitions. [2023-11-17 11:22:59,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,909 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 44 flow. Second operand 3 states and 41 transitions. [2023-11-17 11:22:59,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 93 flow [2023-11-17 11:22:59,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 93 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:59,910 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 59 flow [2023-11-17 11:22:59,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-11-17 11:22:59,910 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-17 11:22:59,911 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 59 flow [2023-11-17 11:22:59,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:59,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:59,911 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:22:59,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:22:59,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:22:59,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:59,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1338217543, now seen corresponding path program 1 times [2023-11-17 11:22:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:59,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345435163] [2023-11-17 11:22:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:59,933 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:59,946 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:59,946 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:59,946 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:22:59,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:22:59,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:22:59,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:22:59,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:22:59,947 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:59,948 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:59,948 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:22:59,962 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:59,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 76 flow [2023-11-17 11:22:59,973 INFO L124 PetriNetUnfolderBase]: 3/37 cut-off events. [2023-11-17 11:22:59,974 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:59,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 3/37 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 4 conditions per place. [2023-11-17 11:22:59,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 76 flow [2023-11-17 11:22:59,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2023-11-17 11:22:59,976 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:59,976 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 29 transitions, 76 flow [2023-11-17 11:22:59,976 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 33 places, 29 transitions, 76 flow [2023-11-17 11:22:59,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 76 flow [2023-11-17 11:22:59,984 INFO L124 PetriNetUnfolderBase]: 3/37 cut-off events. [2023-11-17 11:22:59,984 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:59,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 3/37 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 4 conditions per place. [2023-11-17 11:22:59,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-17 11:23:00,280 INFO L134 LiptonReduction]: Checked pairs total: 606 [2023-11-17 11:23:00,281 INFO L136 LiptonReduction]: Total number of compositions: 15 [2023-11-17 11:23:00,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:00,285 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=LoopHeads, 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;@8473e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:00,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:23:00,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:00,286 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:23:00,286 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:00,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:00,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:00,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:23:00,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:00,287 INFO L85 PathProgramCache]: Analyzing trace with hash 5755564, now seen corresponding path program 1 times [2023-11-17 11:23:00,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:00,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730296933] [2023-11-17 11:23:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:00,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:00,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:00,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730296933] [2023-11-17 11:23:00,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730296933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:00,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:00,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:23:00,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360842033] [2023-11-17 11:23:00,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:00,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:00,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:00,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:00,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:00,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2023-11-17 11:23:00,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:00,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2023-11-17 11:23:00,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:00,467 INFO L124 PetriNetUnfolderBase]: 265/469 cut-off events. [2023-11-17 11:23:00,467 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-17 11:23:00,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 469 events. 265/469 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1951 event pairs, 65 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 215. Up to 357 conditions per place. [2023-11-17 11:23:00,473 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 21 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-11-17 11:23:00,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 138 flow [2023-11-17 11:23:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2023-11-17 11:23:00,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2023-11-17 11:23:00,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 51 transitions. [2023-11-17 11:23:00,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 51 transitions. [2023-11-17 11:23:00,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:00,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 51 transitions. [2023-11-17 11:23:00,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,479 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 58 flow. Second operand 3 states and 51 transitions. [2023-11-17 11:23:00,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 138 flow [2023-11-17 11:23:00,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 134 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:00,481 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 84 flow [2023-11-17 11:23:00,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-11-17 11:23:00,483 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-11-17 11:23:00,483 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 84 flow [2023-11-17 11:23:00,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:00,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:00,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:23:00,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:23:00,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1005742871, now seen corresponding path program 1 times [2023-11-17 11:23:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:00,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935370419] [2023-11-17 11:23:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:23:00,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:00,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935370419] [2023-11-17 11:23:00,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935370419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:00,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:00,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:00,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016762998] [2023-11-17 11:23:00,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:00,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:00,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:00,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:00,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:00,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2023-11-17 11:23:00,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:00,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2023-11-17 11:23:00,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:00,616 INFO L124 PetriNetUnfolderBase]: 450/708 cut-off events. [2023-11-17 11:23:00,616 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-11-17 11:23:00,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 708 events. 450/708 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2622 event pairs, 89 based on Foata normal form. 69/777 useless extension candidates. Maximal degree in co-relation 1245. Up to 616 conditions per place. [2023-11-17 11:23:00,620 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 25 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-11-17 11:23:00,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 158 flow [2023-11-17 11:23:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2023-11-17 11:23:00,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2023-11-17 11:23:00,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 49 transitions. [2023-11-17 11:23:00,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 49 transitions. [2023-11-17 11:23:00,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:00,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 49 transitions. [2023-11-17 11:23:00,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,623 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 84 flow. Second operand 3 states and 49 transitions. [2023-11-17 11:23:00,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 158 flow [2023-11-17 11:23:00,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:23:00,624 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 89 flow [2023-11-17 11:23:00,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-11-17 11:23:00,625 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-11-17 11:23:00,625 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 89 flow [2023-11-17 11:23:00,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:00,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:00,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:23:00,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:23:00,626 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:23:00,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:00,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1340037951, now seen corresponding path program 1 times [2023-11-17 11:23:00,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:00,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607833954] [2023-11-17 11:23:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:00,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:00,634 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:00,640 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:00,640 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:00,640 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:23:00,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:23:00,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:23:00,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:23:00,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:23:00,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:23:00,641 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:23:00,641 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:00,641 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:23:00,650 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:00,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 102 flow [2023-11-17 11:23:00,653 INFO L124 PetriNetUnfolderBase]: 4/48 cut-off events. [2023-11-17 11:23:00,654 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:23:00,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 48 events. 4/48 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 49. Up to 5 conditions per place. [2023-11-17 11:23:00,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 102 flow [2023-11-17 11:23:00,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 37 transitions, 102 flow [2023-11-17 11:23:00,654 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:00,654 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 37 transitions, 102 flow [2023-11-17 11:23:00,655 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 37 transitions, 102 flow [2023-11-17 11:23:00,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 102 flow [2023-11-17 11:23:00,657 INFO L124 PetriNetUnfolderBase]: 4/48 cut-off events. [2023-11-17 11:23:00,657 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:23:00,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 48 events. 4/48 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 49. Up to 5 conditions per place. [2023-11-17 11:23:00,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 896 [2023-11-17 11:23:00,967 INFO L134 LiptonReduction]: Checked pairs total: 2022 [2023-11-17 11:23:00,967 INFO L136 LiptonReduction]: Total number of compositions: 21 [2023-11-17 11:23:00,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:00,972 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=LoopHeads, 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;@8473e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:00,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:23:00,973 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:00,974 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:23:00,974 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:00,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:00,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:00,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:23:00,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:00,975 INFO L85 PathProgramCache]: Analyzing trace with hash 7356556, now seen corresponding path program 1 times [2023-11-17 11:23:00,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:00,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752538702] [2023-11-17 11:23:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:00,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:01,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:01,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752538702] [2023-11-17 11:23:01,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752538702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:01,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:01,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:23:01,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664523694] [2023-11-17 11:23:01,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:01,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:01,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 58 [2023-11-17 11:23:01,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:01,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 58 [2023-11-17 11:23:01,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:01,239 INFO L124 PetriNetUnfolderBase]: 1643/2446 cut-off events. [2023-11-17 11:23:01,239 INFO L125 PetriNetUnfolderBase]: For 547/547 co-relation queries the response was YES. [2023-11-17 11:23:01,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5127 conditions, 2446 events. 1643/2446 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 11635 event pairs, 411 based on Foata normal form. 0/1932 useless extension candidates. Maximal degree in co-relation 983. Up to 2172 conditions per place. [2023-11-17 11:23:01,255 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 27 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-11-17 11:23:01,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 187 flow [2023-11-17 11:23:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2023-11-17 11:23:01,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850574712643678 [2023-11-17 11:23:01,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2023-11-17 11:23:01,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2023-11-17 11:23:01,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:01,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2023-11-17 11:23:01,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,260 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 80 flow. Second operand 3 states and 67 transitions. [2023-11-17 11:23:01,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 187 flow [2023-11-17 11:23:01,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 175 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:01,262 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 109 flow [2023-11-17 11:23:01,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-17 11:23:01,264 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-11-17 11:23:01,264 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 109 flow [2023-11-17 11:23:01,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:01,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:01,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:23:01,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:23:01,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash -584828487, now seen corresponding path program 1 times [2023-11-17 11:23:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:01,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74387120] [2023-11-17 11:23:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:01,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:01,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74387120] [2023-11-17 11:23:01,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74387120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:01,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:01,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:01,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122528636] [2023-11-17 11:23:01,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:01,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:01,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:01,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:01,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:01,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 58 [2023-11-17 11:23:01,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:01,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 58 [2023-11-17 11:23:01,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:01,550 INFO L124 PetriNetUnfolderBase]: 2562/3592 cut-off events. [2023-11-17 11:23:01,550 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-11-17 11:23:01,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8804 conditions, 3592 events. 2562/3592 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14962 event pairs, 528 based on Foata normal form. 513/4105 useless extension candidates. Maximal degree in co-relation 6480. Up to 3360 conditions per place. [2023-11-17 11:23:01,571 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 32 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-11-17 11:23:01,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 206 flow [2023-11-17 11:23:01,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2023-11-17 11:23:01,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2023-11-17 11:23:01,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 63 transitions. [2023-11-17 11:23:01,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 63 transitions. [2023-11-17 11:23:01,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:01,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 63 transitions. [2023-11-17 11:23:01,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,576 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,576 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 109 flow. Second operand 3 states and 63 transitions. [2023-11-17 11:23:01,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 206 flow [2023-11-17 11:23:01,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:23:01,578 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 116 flow [2023-11-17 11:23:01,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-17 11:23:01,579 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-11-17 11:23:01,579 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 116 flow [2023-11-17 11:23:01,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:01,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:01,579 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:01,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:23:01,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:23:01,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash 544769777, now seen corresponding path program 1 times [2023-11-17 11:23:01,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:01,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075049288] [2023-11-17 11:23:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:01,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:01,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:01,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:01,595 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:01,595 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:23:01,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:23:01,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:23:01,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:23:01,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:23:01,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:23:01,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:23:01,596 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:23:01,596 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:01,596 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:23:01,606 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:01,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 45 transitions, 130 flow [2023-11-17 11:23:01,610 INFO L124 PetriNetUnfolderBase]: 5/59 cut-off events. [2023-11-17 11:23:01,611 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:23:01,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 59 events. 5/59 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 66. Up to 6 conditions per place. [2023-11-17 11:23:01,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 45 transitions, 130 flow [2023-11-17 11:23:01,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 45 transitions, 130 flow [2023-11-17 11:23:01,612 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:01,612 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 45 transitions, 130 flow [2023-11-17 11:23:01,612 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 45 transitions, 130 flow [2023-11-17 11:23:01,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 45 transitions, 130 flow [2023-11-17 11:23:01,615 INFO L124 PetriNetUnfolderBase]: 5/59 cut-off events. [2023-11-17 11:23:01,615 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:23:01,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 59 events. 5/59 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 66. Up to 6 conditions per place. [2023-11-17 11:23:01,616 INFO L119 LiptonReduction]: Number of co-enabled transitions 1400 [2023-11-17 11:23:02,007 INFO L134 LiptonReduction]: Checked pairs total: 3154 [2023-11-17 11:23:02,007 INFO L136 LiptonReduction]: Total number of compositions: 26 [2023-11-17 11:23:02,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:02,009 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=LoopHeads, 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;@8473e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:02,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:23:02,010 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:02,010 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:23:02,010 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:02,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:02,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:02,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:23:02,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:02,011 INFO L85 PathProgramCache]: Analyzing trace with hash 9388534, now seen corresponding path program 1 times [2023-11-17 11:23:02,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:02,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755773180] [2023-11-17 11:23:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:02,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:02,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:02,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755773180] [2023-11-17 11:23:02,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755773180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:02,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:02,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:23:02,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12200200] [2023-11-17 11:23:02,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:02,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:02,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:02,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:02,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:02,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 71 [2023-11-17 11:23:02,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:02,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 71 [2023-11-17 11:23:02,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:02,845 INFO L124 PetriNetUnfolderBase]: 9376/12674 cut-off events. [2023-11-17 11:23:02,845 INFO L125 PetriNetUnfolderBase]: For 3484/3484 co-relation queries the response was YES. [2023-11-17 11:23:02,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26674 conditions, 12674 events. 9376/12674 cut-off events. For 3484/3484 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 64701 event pairs, 2654 based on Foata normal form. 0/9535 useless extension candidates. Maximal degree in co-relation 5183. Up to 12024 conditions per place. [2023-11-17 11:23:02,937 INFO L140 encePairwiseOnDemand]: 58/71 looper letters, 33 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2023-11-17 11:23:02,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 240 flow [2023-11-17 11:23:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:02,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2023-11-17 11:23:02,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38028169014084506 [2023-11-17 11:23:02,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 81 transitions. [2023-11-17 11:23:02,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 81 transitions. [2023-11-17 11:23:02,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:02,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 81 transitions. [2023-11-17 11:23:02,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,942 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 102 flow. Second operand 3 states and 81 transitions. [2023-11-17 11:23:02,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 240 flow [2023-11-17 11:23:02,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 216 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:02,946 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 134 flow [2023-11-17 11:23:02,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-17 11:23:02,946 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-11-17 11:23:02,946 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 134 flow [2023-11-17 11:23:02,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:02,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:02,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:23:02,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:23:02,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:02,947 INFO L85 PathProgramCache]: Analyzing trace with hash 788777525, now seen corresponding path program 1 times [2023-11-17 11:23:02,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:02,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880723441] [2023-11-17 11:23:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:02,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:02,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:02,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880723441] [2023-11-17 11:23:02,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880723441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:02,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:02,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:02,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133748995] [2023-11-17 11:23:02,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:02,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:02,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:02,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:02,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 71 [2023-11-17 11:23:02,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:02,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:02,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 71 [2023-11-17 11:23:02,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:03,876 INFO L124 PetriNetUnfolderBase]: 13314/17424 cut-off events. [2023-11-17 11:23:03,877 INFO L125 PetriNetUnfolderBase]: For 3503/3503 co-relation queries the response was YES. [2023-11-17 11:23:03,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42284 conditions, 17424 events. 13314/17424 cut-off events. For 3503/3503 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 78284 event pairs, 3080 based on Foata normal form. 3138/20562 useless extension candidates. Maximal degree in co-relation 31371. Up to 16864 conditions per place. [2023-11-17 11:23:03,952 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 39 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-11-17 11:23:03,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 254 flow [2023-11-17 11:23:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2023-11-17 11:23:03,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3615023474178404 [2023-11-17 11:23:03,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 77 transitions. [2023-11-17 11:23:03,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 77 transitions. [2023-11-17 11:23:03,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:03,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 77 transitions. [2023-11-17 11:23:03,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:03,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:03,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:03,955 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 134 flow. Second operand 3 states and 77 transitions. [2023-11-17 11:23:03,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 254 flow [2023-11-17 11:23:03,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:23:03,960 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 143 flow [2023-11-17 11:23:03,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-17 11:23:03,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-11-17 11:23:03,961 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 143 flow [2023-11-17 11:23:03,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:03,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:03,961 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:03,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:23:03,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:23:03,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:03,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1920068992, now seen corresponding path program 1 times [2023-11-17 11:23:03,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:03,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617687432] [2023-11-17 11:23:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:03,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:03,977 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:03,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:03,992 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:03,992 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 11:23:03,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:23:03,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 11:23:03,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 11:23:03,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 11:23:03,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 11:23:03,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:23:03,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:23:03,993 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:23:03,993 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:03,993 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 11:23:04,008 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:04,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 53 transitions, 160 flow [2023-11-17 11:23:04,114 INFO L124 PetriNetUnfolderBase]: 6/70 cut-off events. [2023-11-17 11:23:04,114 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:23:04,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 70 events. 6/70 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 137 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 84. Up to 7 conditions per place. [2023-11-17 11:23:04,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 53 transitions, 160 flow [2023-11-17 11:23:04,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 53 transitions, 160 flow [2023-11-17 11:23:04,115 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:04,115 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 53 transitions, 160 flow [2023-11-17 11:23:04,116 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 53 transitions, 160 flow [2023-11-17 11:23:04,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 53 transitions, 160 flow [2023-11-17 11:23:04,119 INFO L124 PetriNetUnfolderBase]: 6/70 cut-off events. [2023-11-17 11:23:04,119 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:23:04,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 70 events. 6/70 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 137 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 84. Up to 7 conditions per place. [2023-11-17 11:23:04,121 INFO L119 LiptonReduction]: Number of co-enabled transitions 2016 [2023-11-17 11:23:04,638 INFO L134 LiptonReduction]: Checked pairs total: 5288 [2023-11-17 11:23:04,639 INFO L136 LiptonReduction]: Total number of compositions: 34 [2023-11-17 11:23:04,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:04,640 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=LoopHeads, 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;@8473e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:04,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 11:23:04,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:04,641 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:23:04,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:04,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:04,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:04,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 11:23:04,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash 11820695, now seen corresponding path program 1 times [2023-11-17 11:23:04,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:04,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147253572] [2023-11-17 11:23:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:04,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:04,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:04,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147253572] [2023-11-17 11:23:04,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147253572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:04,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:04,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:23:04,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777864601] [2023-11-17 11:23:04,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:04,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:04,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:04,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:04,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 87 [2023-11-17 11:23:04,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:04,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:04,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 87 [2023-11-17 11:23:04,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:08,442 INFO L124 PetriNetUnfolderBase]: 50084/63789 cut-off events. [2023-11-17 11:23:08,443 INFO L125 PetriNetUnfolderBase]: For 20783/20783 co-relation queries the response was YES. [2023-11-17 11:23:08,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134482 conditions, 63789 events. 50084/63789 cut-off events. For 20783/20783 co-relation queries the response was YES. Maximal size of possible extension queue 3387. Compared 338824 event pairs, 16062 based on Foata normal form. 0/46593 useless extension candidates. Maximal degree in co-relation 26920. Up to 62289 conditions per place. [2023-11-17 11:23:09,009 INFO L140 encePairwiseOnDemand]: 69/87 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-11-17 11:23:09,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 297 flow [2023-11-17 11:23:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2023-11-17 11:23:09,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38697318007662834 [2023-11-17 11:23:09,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 101 transitions. [2023-11-17 11:23:09,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 101 transitions. [2023-11-17 11:23:09,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:09,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 101 transitions. [2023-11-17 11:23:09,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,013 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 132 flow. Second operand 3 states and 101 transitions. [2023-11-17 11:23:09,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 297 flow [2023-11-17 11:23:09,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 257 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:09,021 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 159 flow [2023-11-17 11:23:09,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-11-17 11:23:09,022 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-11-17 11:23:09,022 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 159 flow [2023-11-17 11:23:09,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:09,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:09,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 11:23:09,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 11:23:09,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:09,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1629114420, now seen corresponding path program 1 times [2023-11-17 11:23:09,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:09,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226009342] [2023-11-17 11:23:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:09,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:23:09,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:09,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226009342] [2023-11-17 11:23:09,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226009342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:09,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:09,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54463292] [2023-11-17 11:23:09,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:09,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:09,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 87 [2023-11-17 11:23:09,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:09,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 87 [2023-11-17 11:23:09,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:13,332 INFO L124 PetriNetUnfolderBase]: 65538/81952 cut-off events. [2023-11-17 11:23:13,332 INFO L125 PetriNetUnfolderBase]: For 18187/18187 co-relation queries the response was YES. [2023-11-17 11:23:13,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197203 conditions, 81952 events. 65538/81952 cut-off events. For 18187/18187 co-relation queries the response was YES. Maximal size of possible extension queue 1945. Compared 387250 event pairs, 17193 based on Foata normal form. 17196/99148 useless extension candidates. Maximal degree in co-relation 146658. Up to 80640 conditions per place. [2023-11-17 11:23:13,801 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 46 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2023-11-17 11:23:13,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 302 flow [2023-11-17 11:23:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-17 11:23:13,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3486590038314176 [2023-11-17 11:23:13,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-17 11:23:13,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-17 11:23:13,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:13,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-17 11:23:13,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:13,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:13,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:13,804 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 159 flow. Second operand 3 states and 91 transitions. [2023-11-17 11:23:13,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 302 flow [2023-11-17 11:23:13,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:23:13,814 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 170 flow [2023-11-17 11:23:13,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-17 11:23:13,815 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-11-17 11:23:13,815 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 170 flow [2023-11-17 11:23:13,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:13,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:13,815 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 11:23:13,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 11:23:13,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash -214012785, now seen corresponding path program 1 times [2023-11-17 11:23:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:13,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285407157] [2023-11-17 11:23:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:13,828 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:13,844 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:13,844 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:13,844 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-17 11:23:13,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-17 11:23:13,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-17 11:23:13,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-17 11:23:13,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-17 11:23:13,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-17 11:23:13,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-17 11:23:13,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-17 11:23:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 11:23:13,846 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:23:13,848 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:13,848 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-17 11:23:13,863 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:13,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 61 transitions, 192 flow [2023-11-17 11:23:13,870 INFO L124 PetriNetUnfolderBase]: 7/81 cut-off events. [2023-11-17 11:23:13,870 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 11:23:13,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 81 events. 7/81 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 168 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 103. Up to 8 conditions per place. [2023-11-17 11:23:13,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 61 transitions, 192 flow [2023-11-17 11:23:13,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 61 transitions, 192 flow [2023-11-17 11:23:13,871 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:13,871 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 61 transitions, 192 flow [2023-11-17 11:23:13,871 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 61 transitions, 192 flow [2023-11-17 11:23:13,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 61 transitions, 192 flow [2023-11-17 11:23:13,875 INFO L124 PetriNetUnfolderBase]: 7/81 cut-off events. [2023-11-17 11:23:13,875 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 11:23:13,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 81 events. 7/81 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 168 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 103. Up to 8 conditions per place. [2023-11-17 11:23:13,876 INFO L119 LiptonReduction]: Number of co-enabled transitions 2744 [2023-11-17 11:23:14,585 INFO L134 LiptonReduction]: Checked pairs total: 7350 [2023-11-17 11:23:14,585 INFO L136 LiptonReduction]: Total number of compositions: 40 [2023-11-17 11:23:14,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:14,588 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=LoopHeads, 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;@8473e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:14,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 11:23:14,589 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:14,589 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 11:23:14,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:14,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:14,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:14,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 11:23:14,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:14,589 INFO L85 PathProgramCache]: Analyzing trace with hash 14745393, now seen corresponding path program 1 times [2023-11-17 11:23:14,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:14,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178457593] [2023-11-17 11:23:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:14,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:14,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178457593] [2023-11-17 11:23:14,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178457593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:14,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:14,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:23:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225156581] [2023-11-17 11:23:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:14,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:14,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:14,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:14,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:14,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 101 [2023-11-17 11:23:14,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:14,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:14,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 101 [2023-11-17 11:23:14,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:34,050 INFO L124 PetriNetUnfolderBase]: 253999/310903 cut-off events. [2023-11-17 11:23:34,050 INFO L125 PetriNetUnfolderBase]: For 117491/117491 co-relation queries the response was YES. [2023-11-17 11:23:34,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655935 conditions, 310903 events. 253999/310903 cut-off events. For 117491/117491 co-relation queries the response was YES. Maximal size of possible extension queue 13629. Compared 1693605 event pairs, 90227 based on Foata normal form. 0/223000 useless extension candidates. Maximal degree in co-relation 135538. Up to 307515 conditions per place. [2023-11-17 11:23:36,759 INFO L140 encePairwiseOnDemand]: 80/101 looper letters, 45 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2023-11-17 11:23:36,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 358 flow [2023-11-17 11:23:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-17 11:23:36,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38613861386138615 [2023-11-17 11:23:36,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-17 11:23:36,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-17 11:23:36,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:36,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-17 11:23:36,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:36,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:36,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:36,762 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 160 flow. Second operand 3 states and 117 transitions. [2023-11-17 11:23:36,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 358 flow [2023-11-17 11:23:36,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 61 transitions, 298 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:36,858 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 184 flow [2023-11-17 11:23:36,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-11-17 11:23:36,858 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-11-17 11:23:36,858 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 184 flow [2023-11-17 11:23:36,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:36,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:36,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:36,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 11:23:36,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 11:23:36,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:36,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1166716720, now seen corresponding path program 1 times [2023-11-17 11:23:36,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:36,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51848856] [2023-11-17 11:23:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:36,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:23:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:36,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51848856] [2023-11-17 11:23:36,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51848856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:36,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:36,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440439564] [2023-11-17 11:23:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:36,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:36,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:36,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 101 [2023-11-17 11:23:36,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:36,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:36,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 101 [2023-11-17 11:23:36,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:59,093 INFO L124 PetriNetUnfolderBase]: 311298/376896 cut-off events. [2023-11-17 11:23:59,094 INFO L125 PetriNetUnfolderBase]: For 90462/90462 co-relation queries the response was YES. [2023-11-17 11:24:00,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900673 conditions, 376896 events. 311298/376896 cut-off events. For 90462/90462 co-relation queries the response was YES. Maximal size of possible extension queue 7320. Compared 1849027 event pairs, 91415 based on Foata normal form. 87903/464799 useless extension candidates. Maximal degree in co-relation 670617. Up to 373888 conditions per place. [2023-11-17 11:24:01,651 INFO L140 encePairwiseOnDemand]: 87/101 looper letters, 53 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-11-17 11:24:01,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 350 flow [2023-11-17 11:24:01,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:24:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:24:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2023-11-17 11:24:01,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465346534653465 [2023-11-17 11:24:01,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 105 transitions. [2023-11-17 11:24:01,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 105 transitions. [2023-11-17 11:24:01,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:24:01,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 105 transitions. [2023-11-17 11:24:01,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:24:01,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:24:01,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:24:01,659 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 184 flow. Second operand 3 states and 105 transitions. [2023-11-17 11:24:01,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 350 flow [2023-11-17 11:24:01,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:24:01,880 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 197 flow [2023-11-17 11:24:01,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-17 11:24:01,881 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2023-11-17 11:24:01,881 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 197 flow [2023-11-17 11:24:01,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:24:01,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:24:01,881 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:24:01,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 11:24:01,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 11:24:01,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:24:01,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2027630911, now seen corresponding path program 1 times [2023-11-17 11:24:01,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:24:01,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091214868] [2023-11-17 11:24:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:24:01,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:24:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:24:01,923 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:24:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:24:01,931 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:24:01,931 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:24:01,931 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-17 11:24:01,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-17 11:24:01,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-17 11:24:01,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-17 11:24:01,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-17 11:24:01,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-17 11:24:01,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-17 11:24:01,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-17 11:24:01,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-17 11:24:01,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 11:24:01,932 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:24:01,932 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:24:01,932 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-17 11:24:01,972 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:24:01,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 69 transitions, 226 flow [2023-11-17 11:24:01,985 INFO L124 PetriNetUnfolderBase]: 8/92 cut-off events. [2023-11-17 11:24:01,986 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 11:24:01,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 92 events. 8/92 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 207 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 123. Up to 9 conditions per place. [2023-11-17 11:24:01,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 69 transitions, 226 flow [2023-11-17 11:24:01,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 69 transitions, 226 flow [2023-11-17 11:24:01,991 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:24:01,991 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 69 transitions, 226 flow [2023-11-17 11:24:01,991 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 69 transitions, 226 flow [2023-11-17 11:24:01,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 69 transitions, 226 flow [2023-11-17 11:24:01,995 INFO L124 PetriNetUnfolderBase]: 8/92 cut-off events. [2023-11-17 11:24:01,996 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 11:24:01,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 92 events. 8/92 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 207 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 123. Up to 9 conditions per place. [2023-11-17 11:24:01,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 3584 [2023-11-17 11:24:02,911 INFO L134 LiptonReduction]: Checked pairs total: 8644 [2023-11-17 11:24:02,912 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-11-17 11:24:02,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:24:02,913 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=LoopHeads, 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;@8473e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:24:02,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-17 11:24:02,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:24:02,914 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 11:24:02,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:24:02,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:24:02,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:24:02,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-11-17 11:24:02,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:24:02,914 INFO L85 PathProgramCache]: Analyzing trace with hash 18101090, now seen corresponding path program 1 times [2023-11-17 11:24:02,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:24:02,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817861009] [2023-11-17 11:24:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:24:02,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:24:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:24:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:24:02,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:24:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817861009] [2023-11-17 11:24:02,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817861009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:24:02,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:24:02,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:24:02,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136051193] [2023-11-17 11:24:02,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:24:02,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:24:02,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:24:02,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:24:02,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:24:02,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 112 [2023-11-17 11:24:02,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:24:02,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:24:02,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 112 [2023-11-17 11:24:02,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand