/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe033_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:19:51,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:19:51,392 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 15:19:51,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:19:51,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:19:51,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:19:51,425 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:19:51,425 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:19:51,426 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:19:51,428 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:19:51,429 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:19:51,429 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:19:51,429 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:19:51,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:19:51,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:19:51,430 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:19:51,430 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:19:51,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:19:51,431 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:19:51,431 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:19:51,431 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:19:51,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:19:51,432 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:19:51,432 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:19:51,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:19:51,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:19:51,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:19:51,433 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:19:51,433 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:19:51,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:19:51,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:19:51,434 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:19:51,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:19:51,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:19:51,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:19:51,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:19:51,639 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:19:51,640 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:19:51,641 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe033_tso.i [2023-11-17 15:19:52,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:19:52,892 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:19:52,892 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe033_tso.i [2023-11-17 15:19:52,902 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc6f39b0/f6ce1b347a8e4a268808abaa6ff3798b/FLAG55d67284c [2023-11-17 15:19:52,915 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc6f39b0/f6ce1b347a8e4a268808abaa6ff3798b [2023-11-17 15:19:52,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:19:52,918 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:19:52,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:19:52,921 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:19:52,924 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:19:52,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:19:52" (1/1) ... [2023-11-17 15:19:52,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f233e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:52, skipping insertion in model container [2023-11-17 15:19:52,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:19:52" (1/1) ... [2023-11-17 15:19:52,964 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:19:53,058 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-wmm/safe033_tso.i[945,958] [2023-11-17 15:19:53,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:19:53,186 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:19:53,194 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-wmm/safe033_tso.i[945,958] [2023-11-17 15:19:53,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:19:53,246 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:19:53,247 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:19:53,252 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:19:53,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53 WrapperNode [2023-11-17 15:19:53,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:19:53,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:19:53,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:19:53,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:19:53,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,279 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,295 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-11-17 15:19:53,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:19:53,296 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:19:53,296 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:19:53,296 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:19:53,302 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,321 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,323 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:19:53,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:19:53,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:19:53,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:19:53,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (1/1) ... [2023-11-17 15:19:53,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:19:53,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:19:53,355 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 15:19:53,375 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 15:19:53,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:19:53,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:19:53,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:19:53,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:19:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:19:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-17 15:19:53,382 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-17 15:19:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-17 15:19:53,382 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-17 15:19:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:19:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:19:53,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:19:53,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:19:53,384 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 15:19:53,505 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:19:53,507 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:19:53,669 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:19:53,676 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:19:53,676 INFO L307 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-17 15:19:53,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:19:53 BoogieIcfgContainer [2023-11-17 15:19:53,677 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:19:53,678 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:19:53,678 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:19:53,680 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:19:53,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:19:52" (1/3) ... [2023-11-17 15:19:53,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c427c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:19:53, skipping insertion in model container [2023-11-17 15:19:53,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:19:53" (2/3) ... [2023-11-17 15:19:53,682 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c427c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:19:53, skipping insertion in model container [2023-11-17 15:19:53,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:19:53" (3/3) ... [2023-11-17 15:19:53,683 INFO L112 eAbstractionObserver]: Analyzing ICFG safe033_tso.i [2023-11-17 15:19:53,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:19:53,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:19:53,694 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:19:53,724 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:19:53,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 74 transitions, 156 flow [2023-11-17 15:19:53,773 INFO L124 PetriNetUnfolderBase]: 2/72 cut-off events. [2023-11-17 15:19:53,773 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:19:53,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-11-17 15:19:53,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 74 transitions, 156 flow [2023-11-17 15:19:53,779 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 59 transitions, 124 flow [2023-11-17 15:19:53,781 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:19:53,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 59 transitions, 124 flow [2023-11-17 15:19:53,791 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 59 transitions, 124 flow [2023-11-17 15:19:53,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 59 transitions, 124 flow [2023-11-17 15:19:53,821 INFO L124 PetriNetUnfolderBase]: 1/59 cut-off events. [2023-11-17 15:19:53,821 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:19:53,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 59 events. 1/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-11-17 15:19:53,822 INFO L119 LiptonReduction]: Number of co-enabled transitions 764 [2023-11-17 15:19:55,219 INFO L134 LiptonReduction]: Checked pairs total: 1075 [2023-11-17 15:19:55,219 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-11-17 15:19:55,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:19:55,233 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;@2f40b38a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:19:55,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:19:55,236 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:19:55,236 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-17 15:19:55,236 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:19:55,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:19:55,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:19:55,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:19:55,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:19:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1038188730, now seen corresponding path program 1 times [2023-11-17 15:19:55,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:19:55,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114027385] [2023-11-17 15:19:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:19:55,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:19:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:19:55,484 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 15:19:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:19:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114027385] [2023-11-17 15:19:55,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114027385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:19:55,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:19:55,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:19:55,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704929180] [2023-11-17 15:19:55,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:19:55,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:19:55,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:19:55,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:19:55,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:19:55,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 127 [2023-11-17 15:19:55,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 15:19:55,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:19:55,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 127 [2023-11-17 15:19:55,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:19:55,562 INFO L124 PetriNetUnfolderBase]: 59/114 cut-off events. [2023-11-17 15:19:55,563 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 15:19:55,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 114 events. 59/114 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 321 event pairs, 24 based on Foata normal form. 2/116 useless extension candidates. Maximal degree in co-relation 232. Up to 107 conditions per place. [2023-11-17 15:19:55,565 INFO L140 encePairwiseOnDemand]: 122/127 looper letters, 15 selfloop transitions, 3 changer transitions 0/18 dead transitions. [2023-11-17 15:19:55,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 18 transitions, 81 flow [2023-11-17 15:19:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:19:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:19:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-11-17 15:19:55,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669291338582677 [2023-11-17 15:19:55,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-11-17 15:19:55,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-11-17 15:19:55,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:19:55,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-11-17 15:19:55,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 15:19:55,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 15:19:55,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 15:19:55,589 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 32 flow. Second operand 3 states and 216 transitions. [2023-11-17 15:19:55,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 18 transitions, 81 flow [2023-11-17 15:19:55,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 78 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:19:55,592 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 47 flow [2023-11-17 15:19:55,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-11-17 15:19:55,597 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-11-17 15:19:55,598 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 47 flow [2023-11-17 15:19:55,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 15:19:55,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:19:55,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:19:55,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:19:55,598 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:19:55,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:19:55,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2119080016, now seen corresponding path program 1 times [2023-11-17 15:19:55,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:19:55,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978720659] [2023-11-17 15:19:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:19:55,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:19:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:19:55,681 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 15:19:55,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:19:55,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978720659] [2023-11-17 15:19:55,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978720659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:19:55,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:19:55,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:19:55,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996569010] [2023-11-17 15:19:55,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:19:55,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:19:55,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:19:55,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:19:55,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:19:55,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 127 [2023-11-17 15:19:55,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 15:19:55,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:19:55,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 127 [2023-11-17 15:19:55,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:19:55,709 INFO L124 PetriNetUnfolderBase]: 24/61 cut-off events. [2023-11-17 15:19:55,710 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:19:55,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 61 events. 24/61 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 141 event pairs, 9 based on Foata normal form. 6/66 useless extension candidates. Maximal degree in co-relation 146. Up to 38 conditions per place. [2023-11-17 15:19:55,710 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 16 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-11-17 15:19:55,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 21 transitions, 103 flow [2023-11-17 15:19:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:19:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:19:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2023-11-17 15:19:55,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616797900262467 [2023-11-17 15:19:55,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2023-11-17 15:19:55,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2023-11-17 15:19:55,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:19:55,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2023-11-17 15:19:55,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 15:19:55,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 15:19:55,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 15:19:55,714 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 47 flow. Second operand 3 states and 214 transitions. [2023-11-17 15:19:55,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 21 transitions, 103 flow [2023-11-17 15:19:55,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:19:55,715 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 63 flow [2023-11-17 15:19:55,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=44, 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=63, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-11-17 15:19:55,715 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2023-11-17 15:19:55,715 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 63 flow [2023-11-17 15:19:55,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 15:19:55,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:19:55,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:19:55,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:19:55,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:19:55,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:19:55,716 INFO L85 PathProgramCache]: Analyzing trace with hash 138000790, now seen corresponding path program 1 times [2023-11-17 15:19:55,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:19:55,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251775921] [2023-11-17 15:19:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:19:55,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:19:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:19:55,839 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 15:19:55,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:19:55,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251775921] [2023-11-17 15:19:55,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251775921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:19:55,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:19:55,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:19:55,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851048549] [2023-11-17 15:19:55,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:19:55,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:19:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:19:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:19:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:19:55,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 127 [2023-11-17 15:19:55,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 15:19:55,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:19:55,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 127 [2023-11-17 15:19:55,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:19:55,877 INFO L124 PetriNetUnfolderBase]: 13/39 cut-off events. [2023-11-17 15:19:55,878 INFO L125 PetriNetUnfolderBase]: For 10/12 co-relation queries the response was YES. [2023-11-17 15:19:55,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 39 events. 13/39 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 6 based on Foata normal form. 7/46 useless extension candidates. Maximal degree in co-relation 106. Up to 20 conditions per place. [2023-11-17 15:19:55,879 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 14 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2023-11-17 15:19:55,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 115 flow [2023-11-17 15:19:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:19:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:19:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 279 transitions. [2023-11-17 15:19:55,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492125984251969 [2023-11-17 15:19:55,882 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 279 transitions. [2023-11-17 15:19:55,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 279 transitions. [2023-11-17 15:19:55,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:19:55,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 279 transitions. [2023-11-17 15:19:55,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 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 15:19:55,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 15:19:55,886 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 15:19:55,886 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 63 flow. Second operand 4 states and 279 transitions. [2023-11-17 15:19:55,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 115 flow [2023-11-17 15:19:55,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 110 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:19:55,887 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 74 flow [2023-11-17 15:19:55,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-11-17 15:19:55,888 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 6 predicate places. [2023-11-17 15:19:55,889 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 74 flow [2023-11-17 15:19:55,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 15:19:55,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:19:55,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:19:55,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:19:55,890 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:19:55,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:19:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash 145490990, now seen corresponding path program 1 times [2023-11-17 15:19:55,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:19:55,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768972234] [2023-11-17 15:19:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:19:55,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:19:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:19:55,994 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 15:19:55,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:19:55,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768972234] [2023-11-17 15:19:55,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768972234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:19:55,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:19:55,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:19:55,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761316738] [2023-11-17 15:19:55,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:19:55,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:19:55,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:19:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:19:55,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:19:56,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 127 [2023-11-17 15:19:56,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 15:19:56,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:19:56,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 127 [2023-11-17 15:19:56,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:19:56,041 INFO L124 PetriNetUnfolderBase]: 16/50 cut-off events. [2023-11-17 15:19:56,041 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:19:56,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 50 events. 16/50 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 114 event pairs, 0 based on Foata normal form. 1/51 useless extension candidates. Maximal degree in co-relation 152. Up to 35 conditions per place. [2023-11-17 15:19:56,041 INFO L140 encePairwiseOnDemand]: 122/127 looper letters, 16 selfloop transitions, 5 changer transitions 4/25 dead transitions. [2023-11-17 15:19:56,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 25 transitions, 168 flow [2023-11-17 15:19:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:19:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:19:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-11-17 15:19:56,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511811023622047 [2023-11-17 15:19:56,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-11-17 15:19:56,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-11-17 15:19:56,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:19:56,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-11-17 15:19:56,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 15:19:56,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 15:19:56,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 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 15:19:56,045 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 74 flow. Second operand 3 states and 210 transitions. [2023-11-17 15:19:56,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 25 transitions, 168 flow [2023-11-17 15:19:56,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 150 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 15:19:56,048 INFO L231 Difference]: Finished difference. Result has 26 places, 17 transitions, 85 flow [2023-11-17 15:19:56,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2023-11-17 15:19:56,049 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 7 predicate places. [2023-11-17 15:19:56,049 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 85 flow [2023-11-17 15:19:56,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 15:19:56,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:19:56,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:19:56,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:19:56,050 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:19:56,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:19:56,050 INFO L85 PathProgramCache]: Analyzing trace with hash 397942434, now seen corresponding path program 2 times [2023-11-17 15:19:56,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:19:56,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965038222] [2023-11-17 15:19:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:19:56,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:19:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:19:56,126 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 15:19:56,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:19:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965038222] [2023-11-17 15:19:56,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965038222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:19:56,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:19:56,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:19:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899312733] [2023-11-17 15:19:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:19:56,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:19:56,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:19:56,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:19:56,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:19:56,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 127 [2023-11-17 15:19:56,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 15:19:56,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:19:56,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 127 [2023-11-17 15:19:56,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:19:56,160 INFO L124 PetriNetUnfolderBase]: 16/55 cut-off events. [2023-11-17 15:19:56,161 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:19:56,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 55 events. 16/55 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 141 event pairs, 1 based on Foata normal form. 1/56 useless extension candidates. Maximal degree in co-relation 188. Up to 33 conditions per place. [2023-11-17 15:19:56,166 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 12 selfloop transitions, 3 changer transitions 10/25 dead transitions. [2023-11-17 15:19:56,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 169 flow [2023-11-17 15:19:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:19:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:19:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2023-11-17 15:19:56,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393700787401575 [2023-11-17 15:19:56,171 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 274 transitions. [2023-11-17 15:19:56,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 274 transitions. [2023-11-17 15:19:56,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:19:56,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 274 transitions. [2023-11-17 15:19:56,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 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 15:19:56,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 15:19:56,177 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 15:19:56,177 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 85 flow. Second operand 4 states and 274 transitions. [2023-11-17 15:19:56,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 169 flow [2023-11-17 15:19:56,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 162 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:19:56,180 INFO L231 Difference]: Finished difference. Result has 29 places, 14 transitions, 74 flow [2023-11-17 15:19:56,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=14} [2023-11-17 15:19:56,181 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 10 predicate places. [2023-11-17 15:19:56,182 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 14 transitions, 74 flow [2023-11-17 15:19:56,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 15:19:56,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:19:56,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:19:56,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:19:56,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:19:56,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:19:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -456769574, now seen corresponding path program 3 times [2023-11-17 15:19:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:19:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472005612] [2023-11-17 15:19:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:19:56,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:19:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:19:56,265 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 15:19:56,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:19:56,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472005612] [2023-11-17 15:19:56,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472005612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:19:56,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:19:56,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:19:56,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229860832] [2023-11-17 15:19:56,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:19:56,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:19:56,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:19:56,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:19:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:19:56,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 127 [2023-11-17 15:19:56,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 14 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 15:19:56,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:19:56,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 127 [2023-11-17 15:19:56,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:19:56,292 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-17 15:19:56,292 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-17 15:19:56,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 17 events. 3/17 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 1 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 55. Up to 7 conditions per place. [2023-11-17 15:19:56,293 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-11-17 15:19:56,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 14 transitions, 100 flow [2023-11-17 15:19:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:19:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:19:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 268 transitions. [2023-11-17 15:19:56,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275590551181102 [2023-11-17 15:19:56,294 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 268 transitions. [2023-11-17 15:19:56,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 268 transitions. [2023-11-17 15:19:56,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:19:56,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 268 transitions. [2023-11-17 15:19:56,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 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 15:19:56,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 15:19:56,296 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 15:19:56,296 INFO L175 Difference]: Start difference. First operand has 29 places, 14 transitions, 74 flow. Second operand 4 states and 268 transitions. [2023-11-17 15:19:56,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 14 transitions, 100 flow [2023-11-17 15:19:56,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 14 transitions, 80 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-11-17 15:19:56,297 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-11-17 15:19:56,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-11-17 15:19:56,297 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-11-17 15:19:56,297 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-11-17 15:19:56,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 15:19:56,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 15:19:56,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 15:19:56,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 15:19:56,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:19:56,300 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2023-11-17 15:19:56,302 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 15:19:56,302 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 15:19:56,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 03:19:56 BasicIcfg [2023-11-17 15:19:56,304 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 15:19:56,305 INFO L158 Benchmark]: Toolchain (without parser) took 3386.31ms. Allocated memory is still 307.2MB. Free memory was 269.1MB in the beginning and 212.6MB in the end (delta: 56.5MB). Peak memory consumption was 58.1MB. Max. memory is 8.0GB. [2023-11-17 15:19:56,305 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 189.8MB. Free memory was 142.8MB in the beginning and 142.6MB in the end (delta: 174.9kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 15:19:56,305 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.72ms. Allocated memory is still 307.2MB. Free memory was 268.7MB in the beginning and 248.7MB in the end (delta: 20.0MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-11-17 15:19:56,305 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.72ms. Allocated memory is still 307.2MB. Free memory was 248.7MB in the beginning and 246.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 15:19:56,306 INFO L158 Benchmark]: Boogie Preprocessor took 28.06ms. Allocated memory is still 307.2MB. Free memory was 246.7MB in the beginning and 245.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 15:19:56,306 INFO L158 Benchmark]: RCFGBuilder took 352.29ms. Allocated memory is still 307.2MB. Free memory was 245.3MB in the beginning and 232.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-11-17 15:19:56,306 INFO L158 Benchmark]: TraceAbstraction took 2626.01ms. Allocated memory is still 307.2MB. Free memory was 232.0MB in the beginning and 212.6MB in the end (delta: 19.5MB). Peak memory consumption was 20.3MB. Max. memory is 8.0GB. [2023-11-17 15:19:56,307 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 189.8MB. Free memory was 142.8MB in the beginning and 142.6MB in the end (delta: 174.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 331.72ms. Allocated memory is still 307.2MB. Free memory was 268.7MB in the beginning and 248.7MB in the end (delta: 20.0MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 42.72ms. Allocated memory is still 307.2MB. Free memory was 248.7MB in the beginning and 246.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.06ms. Allocated memory is still 307.2MB. Free memory was 246.7MB in the beginning and 245.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 352.29ms. Allocated memory is still 307.2MB. Free memory was 245.3MB in the beginning and 232.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 2626.01ms. Allocated memory is still 307.2MB. Free memory was 232.0MB in the beginning and 212.6MB in the end (delta: 19.5MB). Peak memory consumption was 20.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 65 PlacesBefore, 19 PlacesAfterwards, 59 TransitionsBefore, 13 TransitionsAfterwards, 764 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 0 ChoiceCompositions, 53 TotalNumberOfCompositions, 1075 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 736, independent: 685, independent conditional: 0, independent unconditional: 685, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 522, independent: 497, independent conditional: 0, independent unconditional: 497, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 522, independent: 494, independent conditional: 0, independent unconditional: 494, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 28, independent: 3, independent conditional: 0, independent unconditional: 3, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 60, independent: 8, independent conditional: 0, independent unconditional: 8, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 736, independent: 188, independent conditional: 0, independent unconditional: 188, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 522, unknown conditional: 0, unknown unconditional: 522] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 92 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.6s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 137 IncrementalHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 3 mSDtfsCounter, 137 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=4, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 156 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 15:19:56,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...