/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-ext/36_stack_cas_p0_vs_concur.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:10:16,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:10:17,025 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 15:10:17,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:10:17,049 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:10:17,050 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:10:17,050 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:10:17,050 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:10:17,051 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:10:17,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:10:17,052 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:10:17,052 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:10:17,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:10:17,055 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:10:17,055 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:10:17,055 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:10:17,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:10:17,055 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:10:17,056 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:10:17,056 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:10:17,056 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:10:17,056 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:10:17,057 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:10:17,057 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:10:17,057 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:10:17,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:17,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:10:17,057 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:10:17,058 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:10:17,058 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:10:17,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:10:17,059 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:10:17,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:10:17,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:10:17,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:10:17,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:10:17,278 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:10:17,278 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:10:17,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-11-17 15:10:18,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:10:18,627 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:10:18,630 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-11-17 15:10:18,641 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b016a539/ffc46ac00f034c678ff23afab4c0114e/FLAG823802808 [2023-11-17 15:10:18,653 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b016a539/ffc46ac00f034c678ff23afab4c0114e [2023-11-17 15:10:18,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:10:18,656 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:10:18,657 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:18,657 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:10:18,660 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:10:18,661 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:18,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17fc52f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18, skipping insertion in model container [2023-11-17 15:10:18,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:18,688 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:10:18,888 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30869,30882] [2023-11-17 15:10:18,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:18,908 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:10:18,956 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30869,30882] [2023-11-17 15:10:18,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:18,982 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:18,982 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:18,987 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:10:18,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18 WrapperNode [2023-11-17 15:10:18,989 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:18,990 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:18,991 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:10:18,991 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:10:18,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,008 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,034 INFO L138 Inliner]: procedures = 172, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 105 [2023-11-17 15:10:19,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:19,035 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:10:19,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:10:19,035 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:10:19,041 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,057 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,061 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,063 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,064 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,065 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,066 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:10:19,067 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:10:19,067 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:10:19,067 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:10:19,068 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (1/1) ... [2023-11-17 15:10:19,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:19,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:10:19,111 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 15:10:19,117 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 15:10:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:10:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:10:19,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:10:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:10:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:10:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:10:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:10:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:10:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:10:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:10:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:10:19,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:10:19,134 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 15:10:19,222 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:10:19,223 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:10:19,366 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:10:19,477 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:10:19,477 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 15:10:19,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:19 BoogieIcfgContainer [2023-11-17 15:10:19,479 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:10:19,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:10:19,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:10:19,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:10:19,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:10:18" (1/3) ... [2023-11-17 15:10:19,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13012e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:19, skipping insertion in model container [2023-11-17 15:10:19,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:18" (2/3) ... [2023-11-17 15:10:19,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13012e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:19, skipping insertion in model container [2023-11-17 15:10:19,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:19" (3/3) ... [2023-11-17 15:10:19,487 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2023-11-17 15:10:19,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:10:19,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:10:19,499 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:10:19,545 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:19,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 86 transitions, 176 flow [2023-11-17 15:10:19,598 INFO L124 PetriNetUnfolderBase]: 10/97 cut-off events. [2023-11-17 15:10:19,598 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:19,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 97 events. 10/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-11-17 15:10:19,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 86 transitions, 176 flow [2023-11-17 15:10:19,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 86 transitions, 176 flow [2023-11-17 15:10:19,608 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:19,617 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 86 transitions, 176 flow [2023-11-17 15:10:19,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 86 transitions, 176 flow [2023-11-17 15:10:19,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 86 transitions, 176 flow [2023-11-17 15:10:19,641 INFO L124 PetriNetUnfolderBase]: 10/97 cut-off events. [2023-11-17 15:10:19,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:19,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 97 events. 10/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-11-17 15:10:19,645 INFO L119 LiptonReduction]: Number of co-enabled transitions 1596 [2023-11-17 15:10:21,246 INFO L134 LiptonReduction]: Checked pairs total: 1910 [2023-11-17 15:10:21,247 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-11-17 15:10:21,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:21,261 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;@4216febd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:21,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:10:21,265 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:21,265 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2023-11-17 15:10:21,265 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:21,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:21,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:10:21,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:21,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash 702659422, now seen corresponding path program 1 times [2023-11-17 15:10:21,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:21,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507280663] [2023-11-17 15:10:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:21,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:21,356 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:21,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:21,381 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:21,382 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:10:21,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:10:21,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:10:21,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:10:21,384 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:10:21,386 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:21,386 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:10:21,413 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:21,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 144 transitions, 298 flow [2023-11-17 15:10:21,435 INFO L124 PetriNetUnfolderBase]: 19/168 cut-off events. [2023-11-17 15:10:21,435 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:21,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 168 events. 19/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 388 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 127. Up to 6 conditions per place. [2023-11-17 15:10:21,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 144 transitions, 298 flow [2023-11-17 15:10:21,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 144 transitions, 298 flow [2023-11-17 15:10:21,438 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:21,438 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 144 transitions, 298 flow [2023-11-17 15:10:21,438 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 144 transitions, 298 flow [2023-11-17 15:10:21,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 144 transitions, 298 flow [2023-11-17 15:10:21,457 INFO L124 PetriNetUnfolderBase]: 19/168 cut-off events. [2023-11-17 15:10:21,457 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:21,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 168 events. 19/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 388 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 127. Up to 6 conditions per place. [2023-11-17 15:10:21,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 9804 [2023-11-17 15:10:29,199 INFO L134 LiptonReduction]: Checked pairs total: 24020 [2023-11-17 15:10:29,200 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-11-17 15:10:29,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:29,208 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;@4216febd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:29,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:10:29,225 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:29,226 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-17 15:10:29,226 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:29,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:29,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:29,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:29,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -242144231, now seen corresponding path program 1 times [2023-11-17 15:10:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:29,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023521909] [2023-11-17 15:10:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:29,326 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 15:10:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023521909] [2023-11-17 15:10:29,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023521909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:29,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:29,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094283527] [2023-11-17 15:10:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:29,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:29,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:29,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-11-17 15:10:29,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 15:10:29,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:29,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-11-17 15:10:29,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:29,655 INFO L124 PetriNetUnfolderBase]: 663/1156 cut-off events. [2023-11-17 15:10:29,655 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-17 15:10:29,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 1156 events. 663/1156 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5778 event pairs, 523 based on Foata normal form. 0/1003 useless extension candidates. Maximal degree in co-relation 1787. Up to 1062 conditions per place. [2023-11-17 15:10:29,662 INFO L140 encePairwiseOnDemand]: 264/271 looper letters, 32 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-11-17 15:10:29,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 164 flow [2023-11-17 15:10:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 275 transitions. [2023-11-17 15:10:29,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.507380073800738 [2023-11-17 15:10:29,685 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 275 transitions. [2023-11-17 15:10:29,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 275 transitions. [2023-11-17 15:10:29,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:29,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 275 transitions. [2023-11-17 15:10:29,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 15:10:29,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 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 15:10:29,695 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 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 15:10:29,696 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 114 flow. Second operand 2 states and 275 transitions. [2023-11-17 15:10:29,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 164 flow [2023-11-17 15:10:29,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:29,700 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 100 flow [2023-11-17 15:10:29,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-11-17 15:10:29,704 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-11-17 15:10:29,704 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 100 flow [2023-11-17 15:10:29,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 15:10:29,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:29,704 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:10:29,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:10:29,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:29,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1615986582, now seen corresponding path program 1 times [2023-11-17 15:10:29,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:29,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892197702] [2023-11-17 15:10:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:29,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:29,741 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:29,741 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:29,741 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:10:29,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:10:29,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:10:29,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:10:29,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:10:29,742 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:29,743 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:29,743 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:10:29,765 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:29,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 202 transitions, 422 flow [2023-11-17 15:10:29,784 INFO L124 PetriNetUnfolderBase]: 28/239 cut-off events. [2023-11-17 15:10:29,784 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:29,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 239 events. 28/239 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 708 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-11-17 15:10:29,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 202 transitions, 422 flow [2023-11-17 15:10:29,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 202 transitions, 422 flow [2023-11-17 15:10:29,787 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:29,787 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 202 transitions, 422 flow [2023-11-17 15:10:29,788 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 202 transitions, 422 flow [2023-11-17 15:10:29,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 202 transitions, 422 flow [2023-11-17 15:10:29,805 INFO L124 PetriNetUnfolderBase]: 28/239 cut-off events. [2023-11-17 15:10:29,805 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:29,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 239 events. 28/239 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 708 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-11-17 15:10:29,813 INFO L119 LiptonReduction]: Number of co-enabled transitions 24624 [2023-11-17 15:10:31,908 INFO L134 LiptonReduction]: Checked pairs total: 71370 [2023-11-17 15:10:31,908 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-11-17 15:10:31,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:31,914 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;@4216febd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:31,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:10:31,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:31,916 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-17 15:10:31,916 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:31,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:31,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:31,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:31,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:31,917 INFO L85 PathProgramCache]: Analyzing trace with hash -961379134, now seen corresponding path program 1 times [2023-11-17 15:10:31,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:31,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434554790] [2023-11-17 15:10:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:31,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:31,963 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 15:10:31,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:31,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434554790] [2023-11-17 15:10:31,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434554790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:31,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:31,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:31,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375324541] [2023-11-17 15:10:31,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:31,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:31,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 383 [2023-11-17 15:10:31,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 15:10:31,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:31,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 383 [2023-11-17 15:10:31,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:33,635 INFO L124 PetriNetUnfolderBase]: 15940/22475 cut-off events. [2023-11-17 15:10:33,635 INFO L125 PetriNetUnfolderBase]: For 1177/1177 co-relation queries the response was YES. [2023-11-17 15:10:33,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45024 conditions, 22475 events. 15940/22475 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 133610 event pairs, 13116 based on Foata normal form. 0/19462 useless extension candidates. Maximal degree in co-relation 22983. Up to 21773 conditions per place. [2023-11-17 15:10:33,755 INFO L140 encePairwiseOnDemand]: 373/383 looper letters, 48 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2023-11-17 15:10:33,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 242 flow [2023-11-17 15:10:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 386 transitions. [2023-11-17 15:10:33,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5039164490861618 [2023-11-17 15:10:33,759 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 386 transitions. [2023-11-17 15:10:33,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 386 transitions. [2023-11-17 15:10:33,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:33,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 386 transitions. [2023-11-17 15:10:33,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 193.0) internal successors, (386), 2 states have internal predecessors, (386), 0 states have call successors, (0), 0 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 15:10:33,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 0 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 15:10:33,763 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 0 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 15:10:33,763 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 166 flow. Second operand 2 states and 386 transitions. [2023-11-17 15:10:33,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 242 flow [2023-11-17 15:10:33,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 240 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:33,766 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 144 flow [2023-11-17 15:10:33,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=383, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2023-11-17 15:10:33,767 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-11-17 15:10:33,767 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 144 flow [2023-11-17 15:10:33,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 15:10:33,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:33,767 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:10:33,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:10:33,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:33,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1311677742, now seen corresponding path program 1 times [2023-11-17 15:10:33,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:33,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601779532] [2023-11-17 15:10:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:33,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:33,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:33,822 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:33,822 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:33,823 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:10:33,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:10:33,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:10:33,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:10:33,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:10:33,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:10:33,823 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:33,824 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:33,824 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:10:33,860 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:33,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 260 transitions, 548 flow [2023-11-17 15:10:33,895 INFO L124 PetriNetUnfolderBase]: 37/310 cut-off events. [2023-11-17 15:10:33,895 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:33,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 310 events. 37/310 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1067 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 247. Up to 10 conditions per place. [2023-11-17 15:10:33,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 260 transitions, 548 flow [2023-11-17 15:10:33,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 260 transitions, 548 flow [2023-11-17 15:10:33,899 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:33,899 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 260 transitions, 548 flow [2023-11-17 15:10:33,899 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 260 transitions, 548 flow [2023-11-17 15:10:33,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 260 transitions, 548 flow [2023-11-17 15:10:33,923 INFO L124 PetriNetUnfolderBase]: 37/310 cut-off events. [2023-11-17 15:10:33,923 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:33,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 310 events. 37/310 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1067 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 247. Up to 10 conditions per place. [2023-11-17 15:10:33,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 46056 [2023-11-17 15:10:43,423 INFO L134 LiptonReduction]: Checked pairs total: 135834 [2023-11-17 15:10:43,423 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-11-17 15:10:43,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:43,425 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;@4216febd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:43,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:10:43,427 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:43,427 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-17 15:10:43,427 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:43,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:43,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:43,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:43,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:43,427 INFO L85 PathProgramCache]: Analyzing trace with hash 933652903, now seen corresponding path program 1 times [2023-11-17 15:10:43,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:43,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229189805] [2023-11-17 15:10:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:43,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:43,440 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 15:10:43,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:43,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229189805] [2023-11-17 15:10:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229189805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:43,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336617496] [2023-11-17 15:10:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:43,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 493 [2023-11-17 15:10:43,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 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 15:10:43,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:43,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 493 [2023-11-17 15:10:43,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:11:15,048 INFO L124 PetriNetUnfolderBase]: 317858/412252 cut-off events. [2023-11-17 15:11:15,048 INFO L125 PetriNetUnfolderBase]: For 31270/31270 co-relation queries the response was YES. [2023-11-17 15:11:15,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827715 conditions, 412252 events. 317858/412252 cut-off events. For 31270/31270 co-relation queries the response was YES. Maximal size of possible extension queue 7446. Compared 2753647 event pairs, 260687 based on Foata normal form. 0/352282 useless extension candidates. Maximal degree in co-relation 184720. Up to 400006 conditions per place. [2023-11-17 15:11:17,924 INFO L140 encePairwiseOnDemand]: 481/493 looper letters, 64 selfloop transitions, 0 changer transitions 0/85 dead transitions. [2023-11-17 15:11:17,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 85 transitions, 326 flow [2023-11-17 15:11:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:11:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:11:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 496 transitions. [2023-11-17 15:11:17,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030425963488844 [2023-11-17 15:11:17,927 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 496 transitions. [2023-11-17 15:11:17,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 496 transitions. [2023-11-17 15:11:17,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:17,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 496 transitions. [2023-11-17 15:11:17,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 248.0) internal successors, (496), 2 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 15:11:17,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 493.0) internal successors, (1479), 3 states have internal predecessors, (1479), 0 states have call successors, (0), 0 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 15:11:17,933 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 493.0) internal successors, (1479), 3 states have internal predecessors, (1479), 0 states have call successors, (0), 0 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 15:11:17,933 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 222 flow. Second operand 2 states and 496 transitions. [2023-11-17 15:11:17,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 85 transitions, 326 flow [2023-11-17 15:11:17,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 85 transitions, 320 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 15:11:17,954 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 192 flow [2023-11-17 15:11:17,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=493, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2023-11-17 15:11:17,956 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -4 predicate places. [2023-11-17 15:11:17,957 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 192 flow [2023-11-17 15:11:17,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 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 15:11:17,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:17,957 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:17,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:11:17,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:11:17,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:17,958 INFO L85 PathProgramCache]: Analyzing trace with hash -544881525, now seen corresponding path program 1 times [2023-11-17 15:11:17,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:17,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842869080] [2023-11-17 15:11:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:17,982 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:11:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:18,003 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:11:18,003 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:11:18,004 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:11:18,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:11:18,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:11:18,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:11:18,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:11:18,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:11:18,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:11:18,004 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:11:18,005 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:11:18,005 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:11:18,039 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:11:18,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 318 transitions, 676 flow [2023-11-17 15:11:18,076 INFO L124 PetriNetUnfolderBase]: 46/381 cut-off events. [2023-11-17 15:11:18,077 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:18,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 381 events. 46/381 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1391 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 323. Up to 12 conditions per place. [2023-11-17 15:11:18,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 288 places, 318 transitions, 676 flow [2023-11-17 15:11:18,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 288 places, 318 transitions, 676 flow [2023-11-17 15:11:18,082 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:11:18,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 288 places, 318 transitions, 676 flow [2023-11-17 15:11:18,082 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 288 places, 318 transitions, 676 flow [2023-11-17 15:11:18,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 318 transitions, 676 flow [2023-11-17 15:11:18,114 INFO L124 PetriNetUnfolderBase]: 46/381 cut-off events. [2023-11-17 15:11:18,114 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:18,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 381 events. 46/381 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1391 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 323. Up to 12 conditions per place. [2023-11-17 15:11:18,126 INFO L119 LiptonReduction]: Number of co-enabled transitions 74100 [2023-11-17 15:11:46,797 INFO L134 LiptonReduction]: Checked pairs total: 228224 [2023-11-17 15:11:46,797 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-11-17 15:11:46,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:46,799 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;@4216febd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:46,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:11:46,800 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:46,800 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-17 15:11:46,800 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:11:46,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:46,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:46,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:46,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1112937458, now seen corresponding path program 1 times [2023-11-17 15:11:46,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:46,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774237431] [2023-11-17 15:11:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:46,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:46,810 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 15:11:46,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:46,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774237431] [2023-11-17 15:11:46,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774237431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:46,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:46,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:46,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219594876] [2023-11-17 15:11:46,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:11:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:11:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:11:46,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 589 [2023-11-17 15:11:46,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 284 flow. Second operand has 2 states, 2 states have (on average 259.0) internal successors, (518), 2 states have internal predecessors, (518), 0 states have call successors, (0), 0 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 15:11:46,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:46,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 589 [2023-11-17 15:11:46,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand