/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 --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 04:42:36,635 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 04:42:36,683 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 [2023-08-24 04:42:36,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 04:42:36,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 04:42:36,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 04:42:36,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 04:42:36,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 04:42:36,707 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 04:42:36,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 04:42:36,708 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 04:42:36,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 04:42:36,709 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 04:42:36,709 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 04:42:36,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 04:42:36,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 04:42:36,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 04:42:36,710 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 04:42:36,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 04:42:36,711 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 04:42:36,711 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 04:42:36,712 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 04:42:36,712 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 04:42:36,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 04:42:36,713 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 04:42:36,713 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 04:42:36,713 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 04:42:36,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 04:42:36,714 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 04:42:36,714 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 04:42:36,715 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 04:42:36,715 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 04:42:36,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 04:42:36,715 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 04:42:36,716 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 04:42:36,716 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 04:42:37,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 04:42:37,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 04:42:37,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 04:42:37,067 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 04:42:37,068 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 04:42:37,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-24 04:42:38,318 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 04:42:38,590 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 04:42:38,590 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2023-08-24 04:42:38,619 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e4b6887/805978b9d482459d875b5a26a7574887/FLAGd53940e4b [2023-08-24 04:42:38,634 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e4b6887/805978b9d482459d875b5a26a7574887 [2023-08-24 04:42:38,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 04:42:38,637 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 04:42:38,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 04:42:38,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 04:42:38,640 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 04:42:38,641 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:42:38" (1/1) ... [2023-08-24 04:42:38,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@402e813b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:38, skipping insertion in model container [2023-08-24 04:42:38,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:42:38" (1/1) ... [2023-08-24 04:42:38,685 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 04:42:38,995 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/stack_longest-1.i[41530,41543] [2023-08-24 04:42:39,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 04:42:39,028 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 04:42:39,059 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 04:42:39,060 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 04:42:39,081 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-24 04:42:39,087 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/stack_longest-1.i[41530,41543] [2023-08-24 04:42:39,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 04:42:39,169 INFO L206 MainTranslator]: Completed translation [2023-08-24 04:42:39,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39 WrapperNode [2023-08-24 04:42:39,171 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 04:42:39,172 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 04:42:39,172 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 04:42:39,173 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 04:42:39,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,242 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-08-24 04:42:39,243 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 04:42:39,245 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 04:42:39,245 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 04:42:39,245 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 04:42:39,252 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,276 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,280 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,284 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 04:42:39,296 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 04:42:39,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 04:42:39,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 04:42:39,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (1/1) ... [2023-08-24 04:42:39,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 04:42:39,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:42:39,325 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) [2023-08-24 04:42:39,338 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 [2023-08-24 04:42:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-24 04:42:39,361 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-24 04:42:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-24 04:42:39,361 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-24 04:42:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 04:42:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 04:42:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 04:42:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 04:42:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 04:42:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 04:42:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 04:42:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 04:42:39,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 04:42:39,365 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 04:42:39,479 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 04:42:39,481 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 04:42:39,749 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 04:42:39,760 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 04:42:39,760 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 04:42:39,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:42:39 BoogieIcfgContainer [2023-08-24 04:42:39,762 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 04:42:39,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 04:42:39,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 04:42:39,768 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 04:42:39,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:42:38" (1/3) ... [2023-08-24 04:42:39,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@972babe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:42:39, skipping insertion in model container [2023-08-24 04:42:39,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:42:39" (2/3) ... [2023-08-24 04:42:39,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@972babe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:42:39, skipping insertion in model container [2023-08-24 04:42:39,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:42:39" (3/3) ... [2023-08-24 04:42:39,772 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-08-24 04:42:39,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 04:42:39,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 04:42:39,789 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 04:42:39,903 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 04:42:39,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 332 flow [2023-08-24 04:42:40,003 INFO L124 PetriNetUnfolderBase]: 10/156 cut-off events. [2023-08-24 04:42:40,003 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 04:42:40,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 10/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 386 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-08-24 04:42:40,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 158 transitions, 332 flow [2023-08-24 04:42:40,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 147 transitions, 303 flow [2023-08-24 04:42:40,028 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 04:42:40,046 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 147 transitions, 303 flow [2023-08-24 04:42:40,049 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 147 transitions, 303 flow [2023-08-24 04:42:40,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 303 flow [2023-08-24 04:42:40,097 INFO L124 PetriNetUnfolderBase]: 10/147 cut-off events. [2023-08-24 04:42:40,098 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 04:42:40,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 10/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 316 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-08-24 04:42:40,103 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-08-24 04:42:43,749 INFO L134 LiptonReduction]: Checked pairs total: 9508 [2023-08-24 04:42:43,749 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-24 04:42:43,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 04:42:43,766 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;@1236d5b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 04:42:43,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 04:42:43,770 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 04:42:43,770 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-24 04:42:43,770 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 04:42:43,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:43,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 04:42:43,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:43,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:43,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1714417513, now seen corresponding path program 1 times [2023-08-24 04:42:43,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:43,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178283345] [2023-08-24 04:42:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:43,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:44,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:42:44,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178283345] [2023-08-24 04:42:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178283345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:42:44,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:42:44,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 04:42:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675085860] [2023-08-24 04:42:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:42:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 04:42:44,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:42:44,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 04:42:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 04:42:44,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 294 [2023-08-24 04:42:44,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2023-08-24 04:42:44,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:42:44,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 294 [2023-08-24 04:42:44,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:42:44,244 INFO L124 PetriNetUnfolderBase]: 845/1378 cut-off events. [2023-08-24 04:42:44,244 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-24 04:42:44,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 1378 events. 845/1378 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5796 event pairs, 243 based on Foata normal form. 0/1124 useless extension candidates. Maximal degree in co-relation 2588. Up to 777 conditions per place. [2023-08-24 04:42:44,255 INFO L140 encePairwiseOnDemand]: 289/294 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-24 04:42:44,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 253 flow [2023-08-24 04:42:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 04:42:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 04:42:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-24 04:42:44,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340136054421769 [2023-08-24 04:42:44,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-24 04:42:44,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-24 04:42:44,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:42:44,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-24 04:42:44,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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) [2023-08-24 04:42:44,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2023-08-24 04:42:44,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2023-08-24 04:42:44,288 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 471 transitions. [2023-08-24 04:42:44,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 253 flow [2023-08-24 04:42:44,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 04:42:44,293 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-08-24 04:42:44,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-08-24 04:42:44,298 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-08-24 04:42:44,298 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-08-24 04:42:44,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2023-08-24 04:42:44,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:44,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:44,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 04:42:44,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:44,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1177704333, now seen corresponding path program 1 times [2023-08-24 04:42:44,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:44,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561979626] [2023-08-24 04:42:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:44,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:44,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:42:44,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561979626] [2023-08-24 04:42:44,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561979626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:42:44,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:42:44,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 04:42:44,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121546899] [2023-08-24 04:42:44,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:42:44,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 04:42:44,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:42:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 04:42:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 04:42:44,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 294 [2023-08-24 04:42:44,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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) [2023-08-24 04:42:44,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:42:44,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 294 [2023-08-24 04:42:44,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:42:44,635 INFO L124 PetriNetUnfolderBase]: 897/1478 cut-off events. [2023-08-24 04:42:44,635 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2023-08-24 04:42:44,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1478 events. 897/1478 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6180 event pairs, 398 based on Foata normal form. 0/1224 useless extension candidates. Maximal degree in co-relation 2810. Up to 1184 conditions per place. [2023-08-24 04:42:44,643 INFO L140 encePairwiseOnDemand]: 291/294 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-08-24 04:42:44,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 249 flow [2023-08-24 04:42:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 04:42:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 04:42:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-24 04:42:44,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2023-08-24 04:42:44,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-24 04:42:44,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-24 04:42:44,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:42:44,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-24 04:42:44,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2023-08-24 04:42:44,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2023-08-24 04:42:44,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2023-08-24 04:42:44,652 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 480 transitions. [2023-08-24 04:42:44,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 249 flow [2023-08-24 04:42:44,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 04:42:44,655 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-08-24 04:42:44,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-24 04:42:44,657 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-24 04:42:44,657 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-08-24 04:42:44,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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) [2023-08-24 04:42:44,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:44,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 04:42:44,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:44,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash -613507711, now seen corresponding path program 1 times [2023-08-24 04:42:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:44,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069550857] [2023-08-24 04:42:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:44,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:44,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:42:44,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069550857] [2023-08-24 04:42:44,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069550857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:42:44,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:42:44,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 04:42:44,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020898647] [2023-08-24 04:42:44,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:42:44,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 04:42:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:42:44,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 04:42:44,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 04:42:44,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 294 [2023-08-24 04:42:44,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2023-08-24 04:42:44,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:42:44,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 294 [2023-08-24 04:42:44,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:42:44,976 INFO L124 PetriNetUnfolderBase]: 861/1442 cut-off events. [2023-08-24 04:42:44,976 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-24 04:42:44,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3180 conditions, 1442 events. 861/1442 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6182 event pairs, 584 based on Foata normal form. 50/1334 useless extension candidates. Maximal degree in co-relation 2808. Up to 1258 conditions per place. [2023-08-24 04:42:44,984 INFO L140 encePairwiseOnDemand]: 291/294 looper letters, 50 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-24 04:42:44,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 264 flow [2023-08-24 04:42:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 04:42:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 04:42:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-24 04:42:44,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351473922902494 [2023-08-24 04:42:44,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-24 04:42:44,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-24 04:42:44,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:42:44,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-24 04:42:44,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 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) [2023-08-24 04:42:44,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2023-08-24 04:42:44,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2023-08-24 04:42:44,991 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 472 transitions. [2023-08-24 04:42:44,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 264 flow [2023-08-24 04:42:44,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 04:42:44,993 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-08-24 04:42:44,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-24 04:42:44,994 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-08-24 04:42:44,994 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-08-24 04:42:44,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2023-08-24 04:42:44,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:44,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:44,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 04:42:44,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:44,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 558175028, now seen corresponding path program 1 times [2023-08-24 04:42:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:44,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318301259] [2023-08-24 04:42:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:44,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:45,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:42:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318301259] [2023-08-24 04:42:45,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318301259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:42:45,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179111500] [2023-08-24 04:42:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:45,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:42:45,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:42:45,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 04:42:45,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 04:42:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:45,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 04:42:45,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:42:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:45,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:42:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179111500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:42:45,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:42:45,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-24 04:42:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452209474] [2023-08-24 04:42:45,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:42:45,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 04:42:45,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:42:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 04:42:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-24 04:42:45,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 294 [2023-08-24 04:42:45,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 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) [2023-08-24 04:42:45,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:42:45,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 294 [2023-08-24 04:42:45,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:42:45,817 INFO L124 PetriNetUnfolderBase]: 1815/3000 cut-off events. [2023-08-24 04:42:45,817 INFO L125 PetriNetUnfolderBase]: For 1081/1081 co-relation queries the response was YES. [2023-08-24 04:42:45,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7073 conditions, 3000 events. 1815/3000 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14159 event pairs, 349 based on Foata normal form. 48/2736 useless extension candidates. Maximal degree in co-relation 6486. Up to 844 conditions per place. [2023-08-24 04:42:45,835 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2023-08-24 04:42:45,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2023-08-24 04:42:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 04:42:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 04:42:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1535 transitions. [2023-08-24 04:42:45,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221088435374149 [2023-08-24 04:42:45,839 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1535 transitions. [2023-08-24 04:42:45,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1535 transitions. [2023-08-24 04:42:45,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:42:45,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1535 transitions. [2023-08-24 04:42:45,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 153.5) internal successors, (1535), 10 states have internal predecessors, (1535), 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) [2023-08-24 04:42:45,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 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) [2023-08-24 04:42:45,850 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 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) [2023-08-24 04:42:45,850 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1535 transitions. [2023-08-24 04:42:45,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2023-08-24 04:42:45,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 04:42:45,857 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-08-24 04:42:45,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-08-24 04:42:45,858 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-08-24 04:42:45,858 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-08-24 04:42:45,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 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) [2023-08-24 04:42:45,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:45,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:45,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 04:42:46,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:42:46,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:46,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:46,066 INFO L85 PathProgramCache]: Analyzing trace with hash -957332165, now seen corresponding path program 1 times [2023-08-24 04:42:46,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:46,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122329404] [2023-08-24 04:42:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:46,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:46,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:42:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122329404] [2023-08-24 04:42:46,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122329404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:42:46,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:42:46,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 04:42:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616654218] [2023-08-24 04:42:46,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:42:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 04:42:46,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:42:46,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 04:42:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 04:42:46,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 294 [2023-08-24 04:42:46,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 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) [2023-08-24 04:42:46,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:42:46,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 294 [2023-08-24 04:42:46,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:42:46,267 INFO L124 PetriNetUnfolderBase]: 573/1102 cut-off events. [2023-08-24 04:42:46,267 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2023-08-24 04:42:46,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 1102 events. 573/1102 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4907 event pairs, 98 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 1698. Up to 785 conditions per place. [2023-08-24 04:42:46,273 INFO L140 encePairwiseOnDemand]: 289/294 looper letters, 46 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-08-24 04:42:46,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 329 flow [2023-08-24 04:42:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 04:42:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 04:42:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-24 04:42:46,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-08-24 04:42:46,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-24 04:42:46,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-24 04:42:46,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:42:46,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-24 04:42:46,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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) [2023-08-24 04:42:46,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2023-08-24 04:42:46,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2023-08-24 04:42:46,279 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 450 transitions. [2023-08-24 04:42:46,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 329 flow [2023-08-24 04:42:46,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 04:42:46,283 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-08-24 04:42:46,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-24 04:42:46,283 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-08-24 04:42:46,284 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-08-24 04:42:46,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 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) [2023-08-24 04:42:46,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:46,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 04:42:46,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:46,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1417362489, now seen corresponding path program 1 times [2023-08-24 04:42:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:46,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63255601] [2023-08-24 04:42:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:46,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:42:46,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63255601] [2023-08-24 04:42:46,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63255601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:42:46,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:42:46,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 04:42:46,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247034497] [2023-08-24 04:42:46,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:42:46,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:42:46,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:42:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:42:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:42:46,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 294 [2023-08-24 04:42:46,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 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) [2023-08-24 04:42:46,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:42:46,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 294 [2023-08-24 04:42:46,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:42:46,574 INFO L124 PetriNetUnfolderBase]: 679/1270 cut-off events. [2023-08-24 04:42:46,575 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2023-08-24 04:42:46,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3196 conditions, 1270 events. 679/1270 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5464 event pairs, 209 based on Foata normal form. 18/1288 useless extension candidates. Maximal degree in co-relation 2552. Up to 666 conditions per place. [2023-08-24 04:42:46,581 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 78 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2023-08-24 04:42:46,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 93 transitions, 524 flow [2023-08-24 04:42:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 04:42:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 04:42:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 896 transitions. [2023-08-24 04:42:46,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-08-24 04:42:46,584 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 896 transitions. [2023-08-24 04:42:46,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 896 transitions. [2023-08-24 04:42:46,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:42:46,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 896 transitions. [2023-08-24 04:42:46,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.33333333333334) internal successors, (896), 6 states have internal predecessors, (896), 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) [2023-08-24 04:42:46,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 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) [2023-08-24 04:42:46,590 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 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) [2023-08-24 04:42:46,590 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 6 states and 896 transitions. [2023-08-24 04:42:46,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 93 transitions, 524 flow [2023-08-24 04:42:46,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 93 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 04:42:46,596 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 271 flow [2023-08-24 04:42:46,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-24 04:42:46,598 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2023-08-24 04:42:46,598 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 271 flow [2023-08-24 04:42:46,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 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) [2023-08-24 04:42:46,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:46,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:46,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 04:42:46,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:46,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash 256939556, now seen corresponding path program 1 times [2023-08-24 04:42:46,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:46,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471536037] [2023-08-24 04:42:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:47,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:42:47,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471536037] [2023-08-24 04:42:47,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471536037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:42:47,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:42:47,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 04:42:47,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122399731] [2023-08-24 04:42:47,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:42:47,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 04:42:47,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:42:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 04:42:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-24 04:42:47,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 294 [2023-08-24 04:42:47,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 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) [2023-08-24 04:42:47,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:42:47,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 294 [2023-08-24 04:42:47,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:42:47,857 INFO L124 PetriNetUnfolderBase]: 975/1854 cut-off events. [2023-08-24 04:42:47,858 INFO L125 PetriNetUnfolderBase]: For 1249/1249 co-relation queries the response was YES. [2023-08-24 04:42:47,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4720 conditions, 1854 events. 975/1854 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9331 event pairs, 295 based on Foata normal form. 0/1832 useless extension candidates. Maximal degree in co-relation 3621. Up to 1030 conditions per place. [2023-08-24 04:42:47,869 INFO L140 encePairwiseOnDemand]: 285/294 looper letters, 106 selfloop transitions, 10 changer transitions 3/124 dead transitions. [2023-08-24 04:42:47,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 124 transitions, 771 flow [2023-08-24 04:42:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 04:42:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 04:42:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 967 transitions. [2023-08-24 04:42:47,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111394557823129 [2023-08-24 04:42:47,872 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 967 transitions. [2023-08-24 04:42:47,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 967 transitions. [2023-08-24 04:42:47,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:42:47,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 967 transitions. [2023-08-24 04:42:47,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 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) [2023-08-24 04:42:47,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 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) [2023-08-24 04:42:47,879 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 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) [2023-08-24 04:42:47,879 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 271 flow. Second operand 8 states and 967 transitions. [2023-08-24 04:42:47,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 124 transitions, 771 flow [2023-08-24 04:42:47,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 124 transitions, 748 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-24 04:42:47,885 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 327 flow [2023-08-24 04:42:47,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-08-24 04:42:47,885 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 31 predicate places. [2023-08-24 04:42:47,885 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 327 flow [2023-08-24 04:42:47,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 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) [2023-08-24 04:42:47,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:47,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 04:42:47,886 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:47,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1974860314, now seen corresponding path program 2 times [2023-08-24 04:42:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:47,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585450838] [2023-08-24 04:42:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:47,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:42:48,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:42:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585450838] [2023-08-24 04:42:48,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585450838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:42:48,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:42:48,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 04:42:48,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498753106] [2023-08-24 04:42:48,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:42:48,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 04:42:48,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:42:48,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 04:42:48,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-24 04:42:48,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 294 [2023-08-24 04:42:48,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 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) [2023-08-24 04:42:48,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:42:48,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 294 [2023-08-24 04:42:48,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:42:49,208 INFO L124 PetriNetUnfolderBase]: 1273/2412 cut-off events. [2023-08-24 04:42:49,208 INFO L125 PetriNetUnfolderBase]: For 1456/1456 co-relation queries the response was YES. [2023-08-24 04:42:49,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6462 conditions, 2412 events. 1273/2412 cut-off events. For 1456/1456 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12235 event pairs, 356 based on Foata normal form. 0/2383 useless extension candidates. Maximal degree in co-relation 4242. Up to 965 conditions per place. [2023-08-24 04:42:49,224 INFO L140 encePairwiseOnDemand]: 286/294 looper letters, 106 selfloop transitions, 14 changer transitions 3/128 dead transitions. [2023-08-24 04:42:49,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 128 transitions, 843 flow [2023-08-24 04:42:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 04:42:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 04:42:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 967 transitions. [2023-08-24 04:42:49,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111394557823129 [2023-08-24 04:42:49,227 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 967 transitions. [2023-08-24 04:42:49,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 967 transitions. [2023-08-24 04:42:49,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:42:49,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 967 transitions. [2023-08-24 04:42:49,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 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) [2023-08-24 04:42:49,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 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) [2023-08-24 04:42:49,234 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 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) [2023-08-24 04:42:49,234 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 327 flow. Second operand 8 states and 967 transitions. [2023-08-24 04:42:49,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 128 transitions, 843 flow [2023-08-24 04:42:49,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 128 transitions, 843 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 04:42:49,241 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 405 flow [2023-08-24 04:42:49,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=405, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2023-08-24 04:42:49,242 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 41 predicate places. [2023-08-24 04:42:49,242 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 405 flow [2023-08-24 04:42:49,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 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) [2023-08-24 04:42:49,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:49,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:49,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 04:42:49,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:49,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash 834917319, now seen corresponding path program 1 times [2023-08-24 04:42:49,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:49,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641920044] [2023-08-24 04:42:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:49,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:42:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 04:42:49,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:42:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641920044] [2023-08-24 04:42:49,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641920044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:42:49,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:42:49,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 04:42:49,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083471308] [2023-08-24 04:42:49,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:42:49,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 04:42:49,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:42:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 04:42:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 04:42:49,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 294 [2023-08-24 04:42:49,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 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) [2023-08-24 04:42:49,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:42:49,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 294 [2023-08-24 04:42:49,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:42:49,766 INFO L124 PetriNetUnfolderBase]: 1345/2519 cut-off events. [2023-08-24 04:42:49,766 INFO L125 PetriNetUnfolderBase]: For 1788/1788 co-relation queries the response was YES. [2023-08-24 04:42:49,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7088 conditions, 2519 events. 1345/2519 cut-off events. For 1788/1788 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12306 event pairs, 540 based on Foata normal form. 16/2505 useless extension candidates. Maximal degree in co-relation 5066. Up to 992 conditions per place. [2023-08-24 04:42:49,786 INFO L140 encePairwiseOnDemand]: 287/294 looper letters, 108 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2023-08-24 04:42:49,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 897 flow [2023-08-24 04:42:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 04:42:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 04:42:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1026 transitions. [2023-08-24 04:42:49,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2023-08-24 04:42:49,790 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1026 transitions. [2023-08-24 04:42:49,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1026 transitions. [2023-08-24 04:42:49,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:42:49,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1026 transitions. [2023-08-24 04:42:49,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 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) [2023-08-24 04:42:49,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 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) [2023-08-24 04:42:49,799 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 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) [2023-08-24 04:42:49,799 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 405 flow. Second operand 7 states and 1026 transitions. [2023-08-24 04:42:49,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 897 flow [2023-08-24 04:42:49,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 873 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-24 04:42:49,813 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 515 flow [2023-08-24 04:42:49,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=515, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-08-24 04:42:49,815 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2023-08-24 04:42:49,815 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 515 flow [2023-08-24 04:42:49,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 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) [2023-08-24 04:42:49,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:42:49,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:49,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 04:42:49,816 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 04:42:49,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:42:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1564096500, now seen corresponding path program 1 times [2023-08-24 04:42:49,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:42:49,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909209729] [2023-08-24 04:42:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:42:49,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:42:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 04:42:49,853 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 04:42:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 04:42:49,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 04:42:49,918 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 04:42:49,919 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-24 04:42:49,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-24 04:42:49,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-24 04:42:49,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-24 04:42:49,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-24 04:42:49,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-24 04:42:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 04:42:49,923 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:42:49,928 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 04:42:49,928 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 04:42:50,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 04:42:49 BasicIcfg [2023-08-24 04:42:50,000 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 04:42:50,000 INFO L158 Benchmark]: Toolchain (without parser) took 11363.25ms. Allocated memory was 371.2MB in the beginning and 698.4MB in the end (delta: 327.2MB). Free memory was 327.5MB in the beginning and 553.4MB in the end (delta: -225.9MB). Peak memory consumption was 103.3MB. Max. memory is 16.0GB. [2023-08-24 04:42:50,001 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 371.2MB. Free memory was 349.4MB in the beginning and 349.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 04:42:50,001 INFO L158 Benchmark]: CACSL2BoogieTranslator took 533.44ms. Allocated memory is still 371.2MB. Free memory was 327.5MB in the beginning and 298.2MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-24 04:42:50,001 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.23ms. Allocated memory is still 371.2MB. Free memory was 298.2MB in the beginning and 295.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 04:42:50,002 INFO L158 Benchmark]: Boogie Preprocessor took 39.31ms. Allocated memory is still 371.2MB. Free memory was 295.0MB in the beginning and 294.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 04:42:50,002 INFO L158 Benchmark]: RCFGBuilder took 466.45ms. Allocated memory is still 371.2MB. Free memory was 294.0MB in the beginning and 274.4MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 04:42:50,002 INFO L158 Benchmark]: TraceAbstraction took 10235.33ms. Allocated memory was 371.2MB in the beginning and 698.4MB in the end (delta: 327.2MB). Free memory was 274.4MB in the beginning and 553.4MB in the end (delta: -279.1MB). Peak memory consumption was 50.9MB. Max. memory is 16.0GB. [2023-08-24 04:42:50,003 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 371.2MB. Free memory was 349.4MB in the beginning and 349.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 533.44ms. Allocated memory is still 371.2MB. Free memory was 327.5MB in the beginning and 298.2MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 71.23ms. Allocated memory is still 371.2MB. Free memory was 298.2MB in the beginning and 295.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 39.31ms. Allocated memory is still 371.2MB. Free memory was 295.0MB in the beginning and 294.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 466.45ms. Allocated memory is still 371.2MB. Free memory was 294.0MB in the beginning and 274.4MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 10235.33ms. Allocated memory was 371.2MB in the beginning and 698.4MB in the end (delta: 327.2MB). Free memory was 274.4MB in the beginning and 553.4MB in the end (delta: -279.1MB). Peak memory consumption was 50.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 753]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [753] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 144 PlacesBefore, 35 PlacesAfterwards, 147 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 86 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 19 ConcurrentYvCompositions, 5 ChoiceCompositions, 136 TotalNumberOfCompositions, 9508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7052, independent: 6870, independent conditional: 0, independent unconditional: 6870, dependent: 182, dependent conditional: 0, dependent unconditional: 182, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4045, independent: 3996, independent conditional: 0, independent unconditional: 3996, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7052, independent: 2874, independent conditional: 0, independent unconditional: 2874, dependent: 133, dependent conditional: 0, dependent unconditional: 133, unknown: 4045, unknown conditional: 0, unknown unconditional: 4045] , Statistics on independence cache: Total cache size (in pairs): 167, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=799, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=799, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 250 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.0s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 472 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 472 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1668 IncrementalHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 0 mSDtfsCounter, 1668 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=515occurred in iteration=9, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1568 SizeOfPredicates, 1 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-24 04:42:50,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...