/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:21:05,520 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:21:05,589 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:21:05,613 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:21:05,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:21:05,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:21:05,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:21:05,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:21:05,615 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:21:05,618 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:21:05,619 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:21:05,619 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:21:05,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:21:05,620 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:21:05,620 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:21:05,620 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:21:05,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:21:05,621 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:21:05,621 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:21:05,621 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:21:05,621 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:21:05,622 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:21:05,622 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:21:05,622 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:21:05,622 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:21:05,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:21:05,623 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:21:05,623 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:21:05,623 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:21:05,623 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:21:05,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:21:05,624 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:21:05,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:21:05,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:21:05,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:21:05,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:21:05,849 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:21:05,849 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:21:05,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-11-17 11:21:06,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:21:07,072 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:21:07,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-11-17 11:21:07,087 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/554020086/43edafb447e54fefadf2ef9c92d5135e/FLAG44b0cef20 [2023-11-17 11:21:07,102 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/554020086/43edafb447e54fefadf2ef9c92d5135e [2023-11-17 11:21:07,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:21:07,105 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:21:07,107 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:21:07,107 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:21:07,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:21:07,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f81ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07, skipping insertion in model container [2023-11-17 11:21:07,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,153 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:21:07,401 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31294,31307] [2023-11-17 11:21:07,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:21:07,418 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:21:07,444 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/26_stack_cas.i[31294,31307] [2023-11-17 11:21:07,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:21:07,465 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:21:07,465 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:21:07,470 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:21:07,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07 WrapperNode [2023-11-17 11:21:07,471 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:21:07,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:21:07,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:21:07,472 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:21:07,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,485 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,503 INFO L138 Inliner]: procedures = 179, calls = 49, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 189 [2023-11-17 11:21:07,503 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:21:07,504 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:21:07,504 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:21:07,504 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:21:07,510 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,513 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,514 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,519 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,522 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,523 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,524 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,527 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:21:07,527 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:21:07,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:21:07,527 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:21:07,528 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:21:07,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:21:07,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:21:07,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:21:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:21:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:21:07,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:21:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:21:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:21:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:21:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:21:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:21:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:21:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:21:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:21:07,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:21:07,585 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:21:07,688 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:21:07,690 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:21:08,010 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:21:08,213 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:21:08,213 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 11:21:08,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:21:08 BoogieIcfgContainer [2023-11-17 11:21:08,215 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:21:08,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:21:08,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:21:08,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:21:08,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:21:07" (1/3) ... [2023-11-17 11:21:08,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa045a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:21:08, skipping insertion in model container [2023-11-17 11:21:08,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (2/3) ... [2023-11-17 11:21:08,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa045a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:21:08, skipping insertion in model container [2023-11-17 11:21:08,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:21:08" (3/3) ... [2023-11-17 11:21:08,222 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-11-17 11:21:08,233 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:21:08,234 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:21:08,234 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:21:08,280 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:08,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 36 transitions, 76 flow [2023-11-17 11:21:08,326 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2023-11-17 11:21:08,326 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:08,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 6/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 29 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2023-11-17 11:21:08,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 36 transitions, 76 flow [2023-11-17 11:21:08,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 36 transitions, 76 flow [2023-11-17 11:21:08,337 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:08,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 36 transitions, 76 flow [2023-11-17 11:21:08,349 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 33 places, 36 transitions, 76 flow [2023-11-17 11:21:08,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 36 transitions, 76 flow [2023-11-17 11:21:08,368 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2023-11-17 11:21:08,368 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:08,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 6/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 29 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2023-11-17 11:21:08,370 INFO L119 LiptonReduction]: Number of co-enabled transitions 240 [2023-11-17 11:21:09,408 INFO L134 LiptonReduction]: Checked pairs total: 598 [2023-11-17 11:21:09,408 INFO L136 LiptonReduction]: Total number of compositions: 19 [2023-11-17 11:21:09,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:09,423 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;@3ede2c2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:09,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:21:09,426 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:09,426 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-11-17 11:21:09,426 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:09,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:09,427 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:21:09,427 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 11:21:09,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash 182114604, now seen corresponding path program 1 times [2023-11-17 11:21:09,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:09,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099406901] [2023-11-17 11:21:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:09,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:09,510 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:09,538 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:09,539 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:09,540 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:21:09,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:21:09,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:21:09,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:21:09,543 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:21:09,545 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:09,545 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:21:09,582 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:09,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 67 transitions, 144 flow [2023-11-17 11:21:09,613 INFO L124 PetriNetUnfolderBase]: 12/72 cut-off events. [2023-11-17 11:21:09,613 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:09,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 12/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 63. Up to 3 conditions per place. [2023-11-17 11:21:09,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 67 transitions, 144 flow [2023-11-17 11:21:09,617 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 67 transitions, 144 flow [2023-11-17 11:21:09,617 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:09,618 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 67 transitions, 144 flow [2023-11-17 11:21:09,618 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 67 transitions, 144 flow [2023-11-17 11:21:09,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 67 transitions, 144 flow [2023-11-17 11:21:09,662 INFO L124 PetriNetUnfolderBase]: 12/72 cut-off events. [2023-11-17 11:21:09,663 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:09,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 12/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 63. Up to 3 conditions per place. [2023-11-17 11:21:09,665 INFO L119 LiptonReduction]: Number of co-enabled transitions 2340 [2023-11-17 11:21:11,113 INFO L134 LiptonReduction]: Checked pairs total: 6795 [2023-11-17 11:21:11,114 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-11-17 11:21:11,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:11,120 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;@3ede2c2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:11,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:21:11,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:11,127 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-11-17 11:21:11,127 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:11,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:11,127 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:21:11,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:21:11,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:11,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1984921417, now seen corresponding path program 1 times [2023-11-17 11:21:11,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:11,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428060037] [2023-11-17 11:21:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:11,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:11,145 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:11,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:11,162 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:11,162 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:21:11,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:21:11,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:21:11,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:21:11,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:21:11,163 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:21:11,163 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:11,163 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:21:11,207 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:11,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 98 transitions, 214 flow [2023-11-17 11:21:11,219 INFO L124 PetriNetUnfolderBase]: 18/106 cut-off events. [2023-11-17 11:21:11,219 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:21:11,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 18/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-11-17 11:21:11,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 98 transitions, 214 flow [2023-11-17 11:21:11,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 98 transitions, 214 flow [2023-11-17 11:21:11,221 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:11,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 98 transitions, 214 flow [2023-11-17 11:21:11,222 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 98 transitions, 214 flow [2023-11-17 11:21:11,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 98 transitions, 214 flow [2023-11-17 11:21:11,231 INFO L124 PetriNetUnfolderBase]: 18/106 cut-off events. [2023-11-17 11:21:11,231 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:21:11,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 18/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-11-17 11:21:11,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 6300 [2023-11-17 11:21:13,294 INFO L134 LiptonReduction]: Checked pairs total: 18314 [2023-11-17 11:21:13,294 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-11-17 11:21:13,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:13,296 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;@3ede2c2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:13,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:21:13,299 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:13,299 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2023-11-17 11:21:13,299 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:21:13,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:13,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:13,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:21:13,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash -125453530, now seen corresponding path program 1 times [2023-11-17 11:21:13,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:13,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765631412] [2023-11-17 11:21:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:21:13,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:13,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765631412] [2023-11-17 11:21:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765631412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:13,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:13,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:21:13,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718140090] [2023-11-17 11:21:13,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:13,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:21:13,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:13,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:21:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:21:13,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 146 [2023-11-17 11:21:13,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:13,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:13,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 146 [2023-11-17 11:21:13,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:16,618 INFO L124 PetriNetUnfolderBase]: 31163/43358 cut-off events. [2023-11-17 11:21:16,619 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2023-11-17 11:21:16,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85304 conditions, 43358 events. 31163/43358 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 245694 event pairs, 6627 based on Foata normal form. 0/35639 useless extension candidates. Maximal degree in co-relation 36596. Up to 37200 conditions per place. [2023-11-17 11:21:16,833 INFO L140 encePairwiseOnDemand]: 132/146 looper letters, 78 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-11-17 11:21:16,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 89 transitions, 372 flow [2023-11-17 11:21:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:21:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:21:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-17 11:21:16,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3698630136986301 [2023-11-17 11:21:16,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-17 11:21:16,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-17 11:21:16,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:16,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-17 11:21:16,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:16,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:16,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:16,853 INFO L175 Difference]: Start difference. First operand has 60 places, 71 transitions, 160 flow. Second operand 3 states and 162 transitions. [2023-11-17 11:21:16,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 89 transitions, 372 flow [2023-11-17 11:21:16,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 368 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 11:21:16,860 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 174 flow [2023-11-17 11:21:16,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2023-11-17 11:21:16,863 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-11-17 11:21:16,863 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 174 flow [2023-11-17 11:21:16,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:16,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:16,863 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:21:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:21:16,864 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 11:21:16,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash 532572139, now seen corresponding path program 1 times [2023-11-17 11:21:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:16,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160489760] [2023-11-17 11:21:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:16,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:16,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:16,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:16,923 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:16,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:21:16,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:21:16,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:21:16,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:21:16,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:21:16,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:21:16,924 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:21:16,925 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:16,925 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:21:16,970 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:16,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 129 transitions, 286 flow [2023-11-17 11:21:16,985 INFO L124 PetriNetUnfolderBase]: 24/140 cut-off events. [2023-11-17 11:21:16,985 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:21:16,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 140 events. 24/140 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 433 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 123. Up to 5 conditions per place. [2023-11-17 11:21:16,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 129 transitions, 286 flow [2023-11-17 11:21:16,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 129 transitions, 286 flow [2023-11-17 11:21:16,987 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:16,988 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 129 transitions, 286 flow [2023-11-17 11:21:16,988 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 129 transitions, 286 flow [2023-11-17 11:21:16,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 129 transitions, 286 flow [2023-11-17 11:21:17,000 INFO L124 PetriNetUnfolderBase]: 24/140 cut-off events. [2023-11-17 11:21:17,000 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:21:17,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 140 events. 24/140 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 433 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 123. Up to 5 conditions per place. [2023-11-17 11:21:17,005 INFO L119 LiptonReduction]: Number of co-enabled transitions 12120 [2023-11-17 11:21:20,358 INFO L134 LiptonReduction]: Checked pairs total: 36027 [2023-11-17 11:21:20,358 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-11-17 11:21:20,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:20,360 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;@3ede2c2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:20,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:21:20,364 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:20,364 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2023-11-17 11:21:20,364 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:21:20,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:20,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:20,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:21:20,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1163065367, now seen corresponding path program 1 times [2023-11-17 11:21:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:20,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20232166] [2023-11-17 11:21:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:21:20,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:20,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20232166] [2023-11-17 11:21:20,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20232166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:20,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:20,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:21:20,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633569852] [2023-11-17 11:21:20,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:20,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:21:20,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:21:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:21:20,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 193 [2023-11-17 11:21:20,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:20,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:20,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 193 [2023-11-17 11:21:20,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand