/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:48:09,758 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:48:09,829 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-VariableLbe.epf [2023-08-23 22:48:09,833 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:48:09,834 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:48:09,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:48:09,860 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:48:09,860 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:48:09,860 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:48:09,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:48:09,864 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:48:09,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:48:09,864 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:48:09,865 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:48:09,865 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:48:09,865 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:48:09,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:48:09,866 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:48:09,866 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:48:09,866 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:48:09,866 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:48:09,867 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:48:09,867 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:48:09,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:48:09,867 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:48:09,868 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:48:09,868 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:48:09,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:48:09,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:48:09,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:48:09,869 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:48:09,869 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:48:09,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:48:09,869 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:48:09,869 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:48:09,870 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:48:10,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:48:10,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:48:10,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:48:10,130 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:48:10,134 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:48:10,136 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-23 22:48:11,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:48:11,397 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:48:11,397 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-23 22:48:11,406 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce7141da2/31c8cc3d60b448baafcb71762e4cce11/FLAG6658c4f69 [2023-08-23 22:48:11,722 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce7141da2/31c8cc3d60b448baafcb71762e4cce11 [2023-08-23 22:48:11,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:48:11,725 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:48:11,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:48:11,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:48:11,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:48:11,728 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:48:11" (1/1) ... [2023-08-23 22:48:11,729 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12147914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:11, skipping insertion in model container [2023-08-23 22:48:11,729 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:48:11" (1/1) ... [2023-08-23 22:48:11,757 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:48:11,932 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_longest-2.i[31164,31177] [2023-08-23 22:48:11,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:48:11,954 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:48:11,980 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-23 22:48:11,982 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-23 22:48:12,008 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_longest-2.i[31164,31177] [2023-08-23 22:48:12,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:48:12,051 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:48:12,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12 WrapperNode [2023-08-23 22:48:12,052 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:48:12,052 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:48:12,053 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:48:12,053 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:48:12,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,109 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-08-23 22:48:12,109 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:48:12,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:48:12,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:48:12,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:48:12,116 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,132 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,132 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,136 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,138 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,140 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,141 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,142 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:48:12,143 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:48:12,143 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:48:12,143 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:48:12,144 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (1/1) ... [2023-08-23 22:48:12,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:48:12,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:48:12,206 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) [2023-08-23 22:48:12,221 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 [2023-08-23 22:48:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 22:48:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-23 22:48:12,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-23 22:48:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:48:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:48:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:48:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:48:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:48:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:48:12,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:48:12,238 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:48:12,359 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:48:12,360 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:48:12,613 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:48:12,799 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:48:12,799 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-23 22:48:12,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:48:12 BoogieIcfgContainer [2023-08-23 22:48:12,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:48:12,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:48:12,802 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:48:12,804 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:48:12,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:48:11" (1/3) ... [2023-08-23 22:48:12,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9be025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:48:12, skipping insertion in model container [2023-08-23 22:48:12,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:48:12" (2/3) ... [2023-08-23 22:48:12,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9be025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:48:12, skipping insertion in model container [2023-08-23 22:48:12,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:48:12" (3/3) ... [2023-08-23 22:48:12,806 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-08-23 22:48:12,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:48:12,817 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:48:12,817 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:48:12,860 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:48:12,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-23 22:48:12,911 INFO L124 PetriNetUnfolderBase]: 11/124 cut-off events. [2023-08-23 22:48:12,911 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:48:12,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-23 22:48:12,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-08-23 22:48:12,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-08-23 22:48:12,921 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:48:12,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-23 22:48:12,929 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-23 22:48:12,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-23 22:48:12,944 INFO L124 PetriNetUnfolderBase]: 11/124 cut-off events. [2023-08-23 22:48:12,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:48:12,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-23 22:48:12,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-08-23 22:48:16,094 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-08-23 22:48:16,095 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-23 22:48:16,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:48:16,108 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=LoopsAndPotentialCycles, 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;@4015c5a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:48:16,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-23 22:48:16,111 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:48:16,111 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-23 22:48:16,111 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:48:16,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:48:16,111 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-23 22:48:16,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-23 22:48:16,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:48:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash 174361225, now seen corresponding path program 1 times [2023-08-23 22:48:16,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:48:16,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925916530] [2023-08-23 22:48:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:48:16,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:48:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:16,184 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:48:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:16,265 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:48:16,266 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:48:16,266 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-23 22:48:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-23 22:48:16,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-23 22:48:16,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:48:16,269 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-23 22:48:16,273 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:48:16,273 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 22:48:16,330 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:48:16,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-23 22:48:16,391 INFO L124 PetriNetUnfolderBase]: 21/215 cut-off events. [2023-08-23 22:48:16,391 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:48:16,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-23 22:48:16,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-08-23 22:48:16,395 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-08-23 22:48:16,395 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:48:16,395 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-23 22:48:16,395 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-23 22:48:16,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-23 22:48:16,425 INFO L124 PetriNetUnfolderBase]: 21/215 cut-off events. [2023-08-23 22:48:16,425 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:48:16,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-23 22:48:16,437 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-08-23 22:48:20,463 INFO L134 LiptonReduction]: Checked pairs total: 33585 [2023-08-23 22:48:20,464 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-23 22:48:20,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:48:20,466 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=LoopsAndPotentialCycles, 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;@4015c5a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:48:20,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-23 22:48:20,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:48:20,470 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-08-23 22:48:20,470 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:48:20,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:48:20,470 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-23 22:48:20,470 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)] === [2023-08-23 22:48:20,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:48:20,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1971217253, now seen corresponding path program 1 times [2023-08-23 22:48:20,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:48:20,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54798326] [2023-08-23 22:48:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:48:20,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:48:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:20,488 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:48:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:20,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:48:20,503 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:48:20,503 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-23 22:48:20,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-23 22:48:20,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-23 22:48:20,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-23 22:48:20,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:48:20,504 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-23 22:48:20,504 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:48:20,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 22:48:20,592 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:48:20,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-08-23 22:48:20,639 INFO L124 PetriNetUnfolderBase]: 31/306 cut-off events. [2023-08-23 22:48:20,639 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:48:20,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-23 22:48:20,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 272 transitions, 565 flow [2023-08-23 22:48:20,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 272 transitions, 565 flow [2023-08-23 22:48:20,646 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:48:20,646 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 272 transitions, 565 flow [2023-08-23 22:48:20,646 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 272 transitions, 565 flow [2023-08-23 22:48:20,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-08-23 22:48:20,679 INFO L124 PetriNetUnfolderBase]: 31/306 cut-off events. [2023-08-23 22:48:20,680 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:48:20,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-23 22:48:20,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 43056 [2023-08-23 22:48:25,853 INFO L134 LiptonReduction]: Checked pairs total: 78907 [2023-08-23 22:48:25,854 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-23 22:48:25,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:48:25,856 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=LoopsAndPotentialCycles, 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;@4015c5a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:48:25,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-23 22:48:25,860 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:48:25,860 INFO L124 PetriNetUnfolderBase]: 7/57 cut-off events. [2023-08-23 22:48:25,860 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:48:25,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:48:25,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:48:25,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-23 22:48:25,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:48:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1544388608, now seen corresponding path program 1 times [2023-08-23 22:48:25,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:48:25,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296330359] [2023-08-23 22:48:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:48:25,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:48:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:48:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:48:25,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:48:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296330359] [2023-08-23 22:48:26,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296330359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:48:26,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:48:26,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:48:26,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452950353] [2023-08-23 22:48:26,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:48:26,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:48:26,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:48:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:48:26,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:48:26,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 490 [2023-08-23 22:48:26,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 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) [2023-08-23 22:48:26,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:48:26,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 490 [2023-08-23 22:48:26,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:48:31,713 INFO L124 PetriNetUnfolderBase]: 53543/75895 cut-off events. [2023-08-23 22:48:31,714 INFO L125 PetriNetUnfolderBase]: For 2734/2734 co-relation queries the response was YES. [2023-08-23 22:48:31,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148813 conditions, 75895 events. 53543/75895 cut-off events. For 2734/2734 co-relation queries the response was YES. Maximal size of possible extension queue 2088. Compared 540833 event pairs, 4345 based on Foata normal form. 0/61788 useless extension candidates. Maximal degree in co-relation 92118. Up to 49070 conditions per place. [2023-08-23 22:48:32,185 INFO L140 encePairwiseOnDemand]: 474/490 looper letters, 209 selfloop transitions, 9 changer transitions 0/234 dead transitions. [2023-08-23 22:48:32,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 234 transitions, 956 flow [2023-08-23 22:48:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 22:48:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 22:48:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1323 transitions. [2023-08-23 22:48:32,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2023-08-23 22:48:32,202 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1323 transitions. [2023-08-23 22:48:32,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1323 transitions. [2023-08-23 22:48:32,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:48:32,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1323 transitions. [2023-08-23 22:48:32,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 264.6) internal successors, (1323), 5 states have internal predecessors, (1323), 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) [2023-08-23 22:48:32,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 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) [2023-08-23 22:48:32,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 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) [2023-08-23 22:48:32,222 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 213 flow. Second operand 5 states and 1323 transitions. [2023-08-23 22:48:32,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 234 transitions, 956 flow [2023-08-23 22:48:32,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 234 transitions, 944 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-23 22:48:32,234 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 267 flow [2023-08-23 22:48:32,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2023-08-23 22:48:32,238 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 7 predicate places. [2023-08-23 22:48:32,238 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 267 flow [2023-08-23 22:48:32,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 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) [2023-08-23 22:48:32,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:48:32,239 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 22:48:32,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:48:32,239 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)] === [2023-08-23 22:48:32,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:48:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash -271960691, now seen corresponding path program 1 times [2023-08-23 22:48:32,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:48:32,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959197071] [2023-08-23 22:48:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:48:32,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:48:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:32,272 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:48:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:48:32,300 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:48:32,300 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:48:32,300 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-23 22:48:32,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-23 22:48:32,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-23 22:48:32,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-23 22:48:32,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-23 22:48:32,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:48:32,301 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:48:32,302 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:48:32,302 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 22:48:32,345 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:48:32,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-08-23 22:48:32,400 INFO L124 PetriNetUnfolderBase]: 41/397 cut-off events. [2023-08-23 22:48:32,400 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:48:32,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-08-23 22:48:32,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 351 transitions, 734 flow [2023-08-23 22:48:32,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 351 transitions, 734 flow [2023-08-23 22:48:32,407 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:48:32,407 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 351 transitions, 734 flow [2023-08-23 22:48:32,408 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 351 transitions, 734 flow [2023-08-23 22:48:32,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-08-23 22:48:32,451 INFO L124 PetriNetUnfolderBase]: 41/397 cut-off events. [2023-08-23 22:48:32,451 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:48:32,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-08-23 22:48:32,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 82056 [2023-08-23 22:48:38,653 INFO L134 LiptonReduction]: Checked pairs total: 163123 [2023-08-23 22:48:38,653 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-23 22:48:38,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:48:38,655 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=LoopsAndPotentialCycles, 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;@4015c5a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:48:38,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-23 22:48:38,659 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:48:38,659 INFO L124 PetriNetUnfolderBase]: 8/56 cut-off events. [2023-08-23 22:48:38,659 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-23 22:48:38,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:48:38,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:48:38,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-23 22:48:38,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:48:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1068344059, now seen corresponding path program 1 times [2023-08-23 22:48:38,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:48:38,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599819606] [2023-08-23 22:48:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:48:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:48:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:48:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:48:38,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:48:38,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599819606] [2023-08-23 22:48:38,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599819606] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:48:38,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:48:38,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:48:38,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129959284] [2023-08-23 22:48:38,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:48:38,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:48:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:48:38,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:48:38,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:48:38,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 633 [2023-08-23 22:48:38,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 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) [2023-08-23 22:48:38,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:48:38,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 633 [2023-08-23 22:48:38,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand