/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/goblint-regression/28-race_reach_60-invariant_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:40:31,419 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:40:31,493 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 11:40:31,531 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:40:31,533 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:40:31,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:40:31,534 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:40:31,534 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:40:31,535 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:40:31,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:40:31,539 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:40:31,540 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:40:31,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:40:31,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:40:31,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:40:31,542 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:40:31,542 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:40:31,542 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:40:31,542 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:40:31,543 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:40:31,543 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:40:31,544 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:40:31,544 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:40:31,544 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:40:31,544 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:40:31,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:31,546 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:40:31,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:40:31,546 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:40:31,547 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:40:31,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:40:31,548 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:40:31,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:40:31,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:40:31,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:40:31,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:40:31,842 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:40:31,842 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:40:31,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-11-17 11:40:32,954 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:40:33,241 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:40:33,245 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-11-17 11:40:33,260 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecedab484/d558c384898e4ac1b98a0befb8f23afb/FLAGcedf8a605 [2023-11-17 11:40:33,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecedab484/d558c384898e4ac1b98a0befb8f23afb [2023-11-17 11:40:33,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:40:33,275 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:40:33,276 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:33,276 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:40:33,279 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:40:33,280 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,281 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d19775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33, skipping insertion in model container [2023-11-17 11:40:33,281 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,321 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:40:33,632 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2023-11-17 11:40:33,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:33,673 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:40:33,718 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2023-11-17 11:40:33,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:33,778 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:40:33,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33 WrapperNode [2023-11-17 11:40:33,778 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:33,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:33,780 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:40:33,780 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:40:33,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,805 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,826 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 168 [2023-11-17 11:40:33,827 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:33,827 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:40:33,827 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:40:33,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:40:33,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,845 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,849 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,851 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,854 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:40:33,855 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:40:33,855 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:40:33,855 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:40:33,856 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:33,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:33,904 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 11:40:33,938 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 11:40:33,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:40:33,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:40:33,946 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:40:33,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:40:33,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:40:33,947 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:40:33,947 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:40:33,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:40:33,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:40:33,948 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:40:33,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:40:33,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:40:33,950 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 11:40:34,113 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:40:34,115 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:40:34,365 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:40:34,483 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:40:34,483 INFO L307 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-17 11:40:34,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:34 BoogieIcfgContainer [2023-11-17 11:40:34,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:40:34,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:40:34,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:40:34,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:40:34,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:40:33" (1/3) ... [2023-11-17 11:40:34,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27195e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:34, skipping insertion in model container [2023-11-17 11:40:34,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (2/3) ... [2023-11-17 11:40:34,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27195e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:34, skipping insertion in model container [2023-11-17 11:40:34,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:34" (3/3) ... [2023-11-17 11:40:34,492 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-11-17 11:40:34,507 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:40:34,507 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 11:40:34,507 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:40:34,542 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:40:34,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 84 transitions, 175 flow [2023-11-17 11:40:34,606 INFO L124 PetriNetUnfolderBase]: 29/122 cut-off events. [2023-11-17 11:40:34,606 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:40:34,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 122 events. 29/122 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 503 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-11-17 11:40:34,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 84 transitions, 175 flow [2023-11-17 11:40:34,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 82 transitions, 168 flow [2023-11-17 11:40:34,638 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:34,652 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 82 transitions, 168 flow [2023-11-17 11:40:34,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 82 transitions, 168 flow [2023-11-17 11:40:34,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 82 transitions, 168 flow [2023-11-17 11:40:34,678 INFO L124 PetriNetUnfolderBase]: 28/120 cut-off events. [2023-11-17 11:40:34,678 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:34,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 120 events. 28/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 492 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-11-17 11:40:34,681 INFO L119 LiptonReduction]: Number of co-enabled transitions 3200 [2023-11-17 11:40:35,579 INFO L134 LiptonReduction]: Checked pairs total: 7678 [2023-11-17 11:40:35,579 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-11-17 11:40:35,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:35,602 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;@7edaca12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:35,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:40:35,608 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:35,608 INFO L124 PetriNetUnfolderBase]: 4/17 cut-off events. [2023-11-17 11:40:35,608 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:35,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:35,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:40:35,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:40:35,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash 425527720, now seen corresponding path program 1 times [2023-11-17 11:40:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:35,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086526833] [2023-11-17 11:40:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:35,826 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 11:40:35,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:35,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086526833] [2023-11-17 11:40:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086526833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:35,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:35,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:35,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817436487] [2023-11-17 11:40:35,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:35,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:35,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-17 11:40:35,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 56 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 11:40:35,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:35,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-17 11:40:35,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:36,023 INFO L124 PetriNetUnfolderBase]: 211/482 cut-off events. [2023-11-17 11:40:36,023 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:36,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 482 events. 211/482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2217 event pairs, 0 based on Foata normal form. 44/481 useless extension candidates. Maximal degree in co-relation 899. Up to 421 conditions per place. [2023-11-17 11:40:36,028 INFO L140 encePairwiseOnDemand]: 119/141 looper letters, 44 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-11-17 11:40:36,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 200 flow [2023-11-17 11:40:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-17 11:40:36,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900709219858156 [2023-11-17 11:40:36,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-17 11:40:36,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-17 11:40:36,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:36,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-17 11:40:36,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 11:40:36,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 11:40:36,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 11:40:36,051 INFO L175 Difference]: Start difference. First operand has 40 places, 56 transitions, 116 flow. Second operand 3 states and 165 transitions. [2023-11-17 11:40:36,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 200 flow [2023-11-17 11:40:36,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 52 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:36,057 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 86 flow [2023-11-17 11:40:36,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-17 11:40:36,062 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-17 11:40:36,062 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 86 flow [2023-11-17 11:40:36,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 11:40:36,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:36,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:40:36,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:40:36,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:40:36,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash 173377631, now seen corresponding path program 1 times [2023-11-17 11:40:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:36,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535864341] [2023-11-17 11:40:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:36,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:36,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:36,155 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:36,155 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:36,156 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:40:36,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:40:36,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:40:36,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:40:36,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:40:36,159 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:40:36,161 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:36,161 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:40:36,182 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:40:36,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 126 transitions, 268 flow [2023-11-17 11:40:36,204 INFO L124 PetriNetUnfolderBase]: 50/209 cut-off events. [2023-11-17 11:40:36,204 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:40:36,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 209 events. 50/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1010 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 126. Up to 9 conditions per place. [2023-11-17 11:40:36,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 126 transitions, 268 flow [2023-11-17 11:40:36,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 126 transitions, 268 flow [2023-11-17 11:40:36,212 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:36,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 126 transitions, 268 flow [2023-11-17 11:40:36,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 126 transitions, 268 flow [2023-11-17 11:40:36,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 126 transitions, 268 flow [2023-11-17 11:40:36,231 INFO L124 PetriNetUnfolderBase]: 50/209 cut-off events. [2023-11-17 11:40:36,232 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:40:36,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 209 events. 50/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1010 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 126. Up to 9 conditions per place. [2023-11-17 11:40:36,241 INFO L119 LiptonReduction]: Number of co-enabled transitions 10000 [2023-11-17 11:40:37,446 INFO L134 LiptonReduction]: Checked pairs total: 28844 [2023-11-17 11:40:37,446 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-11-17 11:40:37,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:37,454 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;@7edaca12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:37,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:40:37,458 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:37,458 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2023-11-17 11:40:37,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:37,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:37,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:40:37,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:40:37,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:37,460 INFO L85 PathProgramCache]: Analyzing trace with hash 601953062, now seen corresponding path program 1 times [2023-11-17 11:40:37,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:37,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989624057] [2023-11-17 11:40:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:37,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:37,538 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 11:40:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989624057] [2023-11-17 11:40:37,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989624057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:37,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257406106] [2023-11-17 11:40:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:37,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:37,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 216 [2023-11-17 11:40:37,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 85 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 11:40:37,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:37,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 216 [2023-11-17 11:40:37,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:38,635 INFO L124 PetriNetUnfolderBase]: 7724/12072 cut-off events. [2023-11-17 11:40:38,635 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-17 11:40:38,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24006 conditions, 12072 events. 7724/12072 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 73425 event pairs, 6876 based on Foata normal form. 1008/11515 useless extension candidates. Maximal degree in co-relation 21242. Up to 11838 conditions per place. [2023-11-17 11:40:38,698 INFO L140 encePairwiseOnDemand]: 187/216 looper letters, 66 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-17 11:40:38,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 302 flow [2023-11-17 11:40:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-11-17 11:40:38,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37808641975308643 [2023-11-17 11:40:38,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-11-17 11:40:38,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-11-17 11:40:38,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:38,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-11-17 11:40:38,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 11:40:38,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 11:40:38,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 11:40:38,714 INFO L175 Difference]: Start difference. First operand has 60 places, 85 transitions, 186 flow. Second operand 3 states and 245 transitions. [2023-11-17 11:40:38,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 302 flow [2023-11-17 11:40:38,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:38,718 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 146 flow [2023-11-17 11:40:38,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-11-17 11:40:38,719 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-11-17 11:40:38,719 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 146 flow [2023-11-17 11:40:38,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 11:40:38,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:38,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:38,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:40:38,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:40:38,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1445246261, now seen corresponding path program 1 times [2023-11-17 11:40:38,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:38,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368794874] [2023-11-17 11:40:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:38,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:38,814 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 11:40:38,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:38,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368794874] [2023-11-17 11:40:38,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368794874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:38,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:38,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:40:38,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170912206] [2023-11-17 11:40:38,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:38,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:38,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:38,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:38,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 216 [2023-11-17 11:40:38,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 11:40:38,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:38,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 216 [2023-11-17 11:40:38,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:40,059 INFO L124 PetriNetUnfolderBase]: 9206/14928 cut-off events. [2023-11-17 11:40:40,059 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-11-17 11:40:40,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29885 conditions, 14928 events. 9206/14928 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 98872 event pairs, 3927 based on Foata normal form. 0/13552 useless extension candidates. Maximal degree in co-relation 29830. Up to 7774 conditions per place. [2023-11-17 11:40:40,130 INFO L140 encePairwiseOnDemand]: 199/216 looper letters, 84 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2023-11-17 11:40:40,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 101 transitions, 426 flow [2023-11-17 11:40:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-11-17 11:40:40,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533950617283951 [2023-11-17 11:40:40,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-11-17 11:40:40,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-11-17 11:40:40,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:40,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-11-17 11:40:40,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 11:40:40,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 11:40:40,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 11:40:40,136 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 146 flow. Second operand 3 states and 229 transitions. [2023-11-17 11:40:40,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 101 transitions, 426 flow [2023-11-17 11:40:40,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 101 transitions, 424 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:40:40,142 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 242 flow [2023-11-17 11:40:40,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2023-11-17 11:40:40,144 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2023-11-17 11:40:40,145 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 242 flow [2023-11-17 11:40:40,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 11:40:40,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:40,145 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:40:40,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:40:40,145 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:40:40,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:40,146 INFO L85 PathProgramCache]: Analyzing trace with hash 767663721, now seen corresponding path program 1 times [2023-11-17 11:40:40,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:40,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942094081] [2023-11-17 11:40:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:40,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:40,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:40,200 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:40,201 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:40,201 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:40:40,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:40:40,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:40:40,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:40:40,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:40:40,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:40:40,203 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:40:40,204 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:40,204 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:40:40,234 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:40:40,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 168 transitions, 363 flow [2023-11-17 11:40:40,313 INFO L124 PetriNetUnfolderBase]: 74/307 cut-off events. [2023-11-17 11:40:40,313 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:40:40,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 307 events. 74/307 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1590 event pairs, 1 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 220. Up to 12 conditions per place. [2023-11-17 11:40:40,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 168 transitions, 363 flow [2023-11-17 11:40:40,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 168 transitions, 363 flow [2023-11-17 11:40:40,318 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:40,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 168 transitions, 363 flow [2023-11-17 11:40:40,318 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 168 transitions, 363 flow [2023-11-17 11:40:40,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 168 transitions, 363 flow [2023-11-17 11:40:40,341 INFO L124 PetriNetUnfolderBase]: 74/307 cut-off events. [2023-11-17 11:40:40,341 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:40:40,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 307 events. 74/307 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1590 event pairs, 1 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 220. Up to 12 conditions per place. [2023-11-17 11:40:40,357 INFO L119 LiptonReduction]: Number of co-enabled transitions 20160 [2023-11-17 11:40:42,109 INFO L134 LiptonReduction]: Checked pairs total: 52045 [2023-11-17 11:40:42,109 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-11-17 11:40:42,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:42,112 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;@7edaca12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:42,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:40:42,114 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:42,115 INFO L124 PetriNetUnfolderBase]: 4/17 cut-off events. [2023-11-17 11:40:42,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:42,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:42,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:40:42,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:40:42,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash 849742737, now seen corresponding path program 1 times [2023-11-17 11:40:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:42,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652676581] [2023-11-17 11:40:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:42,139 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 11:40:42,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:42,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652676581] [2023-11-17 11:40:42,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652676581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:42,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:42,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:42,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201065292] [2023-11-17 11:40:42,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:42,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:42,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:42,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 286 [2023-11-17 11:40:42,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 114 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 11:40:42,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:42,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 286 [2023-11-17 11:40:42,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:56,489 INFO L124 PetriNetUnfolderBase]: 168911/230748 cut-off events. [2023-11-17 11:40:56,490 INFO L125 PetriNetUnfolderBase]: For 2362/2362 co-relation queries the response was YES. [2023-11-17 11:40:56,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460775 conditions, 230748 events. 168911/230748 cut-off events. For 2362/2362 co-relation queries the response was YES. Maximal size of possible extension queue 4700. Compared 1601519 event pairs, 123974 based on Foata normal form. 18498/221506 useless extension candidates. Maximal degree in co-relation 67929. Up to 228323 conditions per place. [2023-11-17 11:40:57,786 INFO L140 encePairwiseOnDemand]: 247/286 looper letters, 84 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-11-17 11:40:57,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 391 flow [2023-11-17 11:40:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-11-17 11:40:57,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776223776223776 [2023-11-17 11:40:57,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-11-17 11:40:57,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-11-17 11:40:57,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:57,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-11-17 11:40:57,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 11:40:57,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 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 11:40:57,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 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 11:40:57,793 INFO L175 Difference]: Start difference. First operand has 79 places, 114 transitions, 255 flow. Second operand 3 states and 324 transitions. [2023-11-17 11:40:57,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 391 flow [2023-11-17 11:40:57,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:57,796 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 195 flow [2023-11-17 11:40:57,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2023-11-17 11:40:57,797 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2023-11-17 11:40:57,797 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 195 flow [2023-11-17 11:40:57,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 11:40:57,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:57,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:57,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:40:57,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:40:57,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:57,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1868580629, now seen corresponding path program 1 times [2023-11-17 11:40:57,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:57,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880498006] [2023-11-17 11:40:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:57,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:57,855 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 11:40:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880498006] [2023-11-17 11:40:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880498006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:57,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:57,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:40:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503418971] [2023-11-17 11:40:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:57,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:57,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 286 [2023-11-17 11:40:57,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 11:40:57,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:57,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 286 [2023-11-17 11:40:57,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:17,155 INFO L124 PetriNetUnfolderBase]: 248208/347320 cut-off events. [2023-11-17 11:41:17,155 INFO L125 PetriNetUnfolderBase]: For 3782/3782 co-relation queries the response was YES. [2023-11-17 11:41:17,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694566 conditions, 347320 events. 248208/347320 cut-off events. For 3782/3782 co-relation queries the response was YES. Maximal size of possible extension queue 6861. Compared 2643335 event pairs, 104210 based on Foata normal form. 0/316962 useless extension candidates. Maximal degree in co-relation 694510. Up to 184801 conditions per place. [2023-11-17 11:41:18,599 INFO L140 encePairwiseOnDemand]: 263/286 looper letters, 113 selfloop transitions, 16 changer transitions 0/135 dead transitions. [2023-11-17 11:41:18,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 135 transitions, 574 flow [2023-11-17 11:41:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:41:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:41:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-11-17 11:41:18,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36013986013986016 [2023-11-17 11:41:18,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-11-17 11:41:18,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-11-17 11:41:18,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:18,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-11-17 11:41:18,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 11:41:18,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 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 11:41:18,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 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 11:41:18,605 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 195 flow. Second operand 3 states and 309 transitions. [2023-11-17 11:41:18,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 135 transitions, 574 flow [2023-11-17 11:41:18,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 135 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:18,631 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 327 flow [2023-11-17 11:41:18,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2023-11-17 11:41:18,632 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 6 predicate places. [2023-11-17 11:41:18,632 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 327 flow [2023-11-17 11:41:18,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 11:41:18,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:18,633 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:41:18,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:41:18,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:41:18,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:18,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1553442718, now seen corresponding path program 1 times [2023-11-17 11:41:18,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:18,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742371364] [2023-11-17 11:41:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:18,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:18,650 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:41:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:18,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:41:18,675 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:41:18,675 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:41:18,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:41:18,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:41:18,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:41:18,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:41:18,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:41:18,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:41:18,683 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:41:18,683 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:41:18,683 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:41:18,725 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:41:18,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 210 transitions, 460 flow [2023-11-17 11:41:18,938 INFO L124 PetriNetUnfolderBase]: 106/429 cut-off events. [2023-11-17 11:41:18,938 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:41:18,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 429 events. 106/429 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2292 event pairs, 6 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 331. Up to 32 conditions per place. [2023-11-17 11:41:18,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 210 transitions, 460 flow [2023-11-17 11:41:18,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 210 transitions, 460 flow [2023-11-17 11:41:18,948 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:41:18,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 210 transitions, 460 flow [2023-11-17 11:41:18,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 210 transitions, 460 flow [2023-11-17 11:41:18,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 210 transitions, 460 flow [2023-11-17 11:41:18,978 INFO L124 PetriNetUnfolderBase]: 106/429 cut-off events. [2023-11-17 11:41:18,979 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:41:18,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 429 events. 106/429 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2292 event pairs, 6 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 331. Up to 32 conditions per place. [2023-11-17 11:41:18,994 INFO L119 LiptonReduction]: Number of co-enabled transitions 33760 [2023-11-17 11:41:21,395 INFO L134 LiptonReduction]: Checked pairs total: 101389 [2023-11-17 11:41:21,396 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-11-17 11:41:21,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:41:21,398 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;@7edaca12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:41:21,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:41:21,399 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:41:21,400 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:41:21,400 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:41:21,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:21,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:41:21,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:41:21,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1164274177, now seen corresponding path program 1 times [2023-11-17 11:41:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:21,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129818805] [2023-11-17 11:41:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:21,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:21,420 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 11:41:21,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:21,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129818805] [2023-11-17 11:41:21,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129818805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:21,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:21,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:21,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492412305] [2023-11-17 11:41:21,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:21,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:21,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:21,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:21,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:21,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 363 [2023-11-17 11:41:21,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 141 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 11:41:21,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:21,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 363 [2023-11-17 11:41:21,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand