/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithoutDepranks.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-29 13:16:12,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-29 13:16:12,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-29 13:16:12,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-29 13:16:12,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-29 13:16:12,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-29 13:16:12,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-29 13:16:12,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-29 13:16:12,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-29 13:16:12,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-29 13:16:12,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-29 13:16:12,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-29 13:16:12,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-29 13:16:12,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-29 13:16:12,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-29 13:16:12,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-29 13:16:12,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-29 13:16:12,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-29 13:16:12,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-29 13:16:12,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-29 13:16:12,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-29 13:16:12,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-29 13:16:12,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-29 13:16:12,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-29 13:16:12,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-29 13:16:12,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-29 13:16:12,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-29 13:16:12,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-29 13:16:12,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-29 13:16:12,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-29 13:16:12,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-29 13:16:12,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-29 13:16:12,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-29 13:16:12,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-29 13:16:12,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-29 13:16:12,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-29 13:16:12,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-29 13:16:12,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-29 13:16:12,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-29 13:16:12,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-29 13:16:12,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-29 13:16:12,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithoutDepranks.epf [2022-01-29 13:16:12,624 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-29 13:16:12,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-29 13:16:12,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-29 13:16:12,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-29 13:16:12,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-29 13:16:12,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-29 13:16:12,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-29 13:16:12,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-29 13:16:12,626 INFO L138 SettingsManager]: * Use SBE=true [2022-01-29 13:16:12,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-29 13:16:12,626 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-29 13:16:12,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-29 13:16:12,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-29 13:16:12,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-29 13:16:12,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-29 13:16:12,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-29 13:16:12,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-29 13:16:12,627 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-29 13:16:12,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-29 13:16:12,628 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-29 13:16:12,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-29 13:16:12,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-29 13:16:12,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-29 13:16:12,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-29 13:16:12,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-29 13:16:12,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-29 13:16:12,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-29 13:16:12,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-29 13:16:12,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-29 13:16:12,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-29 13:16:12,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-29 13:16:12,629 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-29 13:16:12,629 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-01-29 13:16:12,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-29 13:16:12,630 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITHOUT_DEPRANKS [2022-01-29 13:16:12,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-29 13:16:12,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-29 13:16:12,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-29 13:16:12,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-29 13:16:12,907 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-29 13:16:12,909 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-29 13:16:12,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2022-01-29 13:16:12,910 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2022-01-29 13:16:12,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-29 13:16:12,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-29 13:16:12,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-29 13:16:12,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-29 13:16:12,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-29 13:16:12,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,967 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-29 13:16:12,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-29 13:16:12,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-29 13:16:12,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-29 13:16:12,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-29 13:16:12,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-29 13:16:12,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-29 13:16:12,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-29 13:16:12,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-29 13:16:12,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/1) ... [2022-01-29 13:16:12,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-29 13:16:13,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-29 13:16:13,033 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) [2022-01-29 13:16:13,046 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 [2022-01-29 13:16:13,079 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-29 13:16:13,079 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-29 13:16:13,079 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-29 13:16:13,079 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-29 13:16:13,079 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-29 13:16:13,079 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-29 13:16:13,079 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-29 13:16:13,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-29 13:16:13,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-29 13:16:13,080 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-29 13:16:13,129 INFO L234 CfgBuilder]: Building ICFG [2022-01-29 13:16:13,131 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-29 13:16:13,209 INFO L275 CfgBuilder]: Performing block encoding [2022-01-29 13:16:13,222 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-29 13:16:13,223 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-29 13:16:13,225 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 01:16:13 BoogieIcfgContainer [2022-01-29 13:16:13,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-29 13:16:13,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-29 13:16:13,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-29 13:16:13,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-29 13:16:13,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.01 01:16:12" (1/2) ... [2022-01-29 13:16:13,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e71de72 and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 01:16:13, skipping insertion in model container [2022-01-29 13:16:13,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 01:16:13" (2/2) ... [2022-01-29 13:16:13,238 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2022-01-29 13:16:13,242 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-29 13:16:13,242 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-29 13:16:13,243 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-29 13:16:13,243 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-29 13:16:13,293 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-29 13:16:13,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-01-29 13:16:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-29 13:16:13,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-01-29 13:16:13,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-01-29 13:16:13,461 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-29 13:16:13,473 INFO L339 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=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-29 13:16:13,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-29 13:16:13,559 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException at java.base/java.util.Collections$UnmodifiableCollection.removeAll(Collections.java:1073) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.LeftRightSplit.removeDuplicate(LeftRightSplit.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.LeftRightSplit.addStatement(LeftRightSplit.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.McrState2.addStatementToSplit(McrState2.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.McrState2.getNextState(McrState2.java:119) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.McrState2.getNextState(McrState2.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.McrStateFactory.createNextState(McrStateFactory.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.MaximalCausalityReduction.internalSuccessors(MaximalCausalityReduction.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.MaximalCausalityReduction.internalSuccessors(MaximalCausalityReduction.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.INwaOutgoingLetterAndTransitionProvider.lambda$0(INwaOutgoingLetterAndTransitionProvider.java:123) at de.uni_freiburg.informatik.ultimate.util.datastructures.relation.NestedIterator.nextLetter(NestedIterator.java:69) at de.uni_freiburg.informatik.ultimate.util.datastructures.relation.NestedIterator.(NestedIterator.java:62) at de.uni_freiburg.informatik.ultimate.util.datastructures.relation.NestedIteratorNoopConstruction.(NestedIteratorNoopConstruction.java:48) at de.uni_freiburg.informatik.ultimate.automata.nestedword.INwaOutgoingLetterAndTransitionProvider.lambda$1(INwaOutgoingLetterAndTransitionProvider.java:124) at java.base/java.lang.Iterable.spliterator(Iterable.java:101) at de.uni_freiburg.informatik.ultimate.automata.partialorder.DepthFirstTraversal.visitState(DepthFirstTraversal.java:197) at de.uni_freiburg.informatik.ultimate.automata.partialorder.DepthFirstTraversal.traverse(DepthFirstTraversal.java:127) at de.uni_freiburg.informatik.ultimate.automata.partialorder.DepthFirstTraversal.(DepthFirstTraversal.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.PartialOrderReductionFacade.apply(PartialOrderReductionFacade.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.PartialOrderCegarLoop.isAbstractionEmpty(PartialOrderCegarLoop.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.computeInitialAbstraction(AbstractCegarLoop.java:386) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:347) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-29 13:16:13,567 INFO L158 Benchmark]: Toolchain (without parser) took 626.77ms. Allocated memory is still 182.5MB. Free memory was 141.6MB in the beginning and 152.4MB in the end (delta: -10.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-29 13:16:13,568 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-29 13:16:13,569 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.44ms. Allocated memory is still 182.5MB. Free memory was 141.5MB in the beginning and 139.9MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-01-29 13:16:13,570 INFO L158 Benchmark]: Boogie Preprocessor took 15.25ms. Allocated memory is still 182.5MB. Free memory was 139.9MB in the beginning and 139.0MB in the end (delta: 923.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-29 13:16:13,571 INFO L158 Benchmark]: RCFGBuilder took 235.99ms. Allocated memory is still 182.5MB. Free memory was 138.9MB in the beginning and 129.8MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-29 13:16:13,572 INFO L158 Benchmark]: TraceAbstraction took 338.82ms. Allocated memory is still 182.5MB. Free memory was 129.4MB in the beginning and 152.4MB in the end (delta: -23.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-29 13:16:13,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.44ms. Allocated memory is still 182.5MB. Free memory was 141.5MB in the beginning and 139.9MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.25ms. Allocated memory is still 182.5MB. Free memory was 139.9MB in the beginning and 139.0MB in the end (delta: 923.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 235.99ms. Allocated memory is still 182.5MB. Free memory was 138.9MB in the beginning and 129.8MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 338.82ms. Allocated memory is still 182.5MB. Free memory was 129.4MB in the beginning and 152.4MB in the end (delta: -23.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: null: java.base/java.util.Collections$UnmodifiableCollection.removeAll(Collections.java:1073) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-01-29 13:16:13,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2022-01-29 13:16:13,838 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...