/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/weaver/popl20-bad-commit-1.wvr-bad.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 08:31:29,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:31:29,168 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 08:31:29,172 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:31:29,172 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:31:29,196 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:31:29,197 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:31:29,197 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:31:29,197 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:31:29,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:31:29,200 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:31:29,200 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:31:29,200 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:31:29,201 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:31:29,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:31:29,201 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:31:29,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:31:29,202 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:31:29,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:31:29,202 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:31:29,202 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:31:29,203 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:31:29,203 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:31:29,203 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:31:29,203 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:31:29,204 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:31:29,204 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:31:29,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:31:29,204 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:31:29,204 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:31:29,205 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:31:29,205 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:31:29,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:31:29,205 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:31:29,205 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:31:29,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:31:29,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:31:29,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:31:29,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:31:29,489 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:31:29,489 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:31:29,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-08-24 08:31:30,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:31:30,670 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:31:30,671 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-08-24 08:31:30,678 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b13708b4/b5f3bc5a00dc4d88895904c2aa52370f/FLAG809017750 [2023-08-24 08:31:30,692 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b13708b4/b5f3bc5a00dc4d88895904c2aa52370f [2023-08-24 08:31:30,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:31:30,698 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:31:30,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:31:30,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:31:30,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:31:30,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2111bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30, skipping insertion in model container [2023-08-24 08:31:30,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,729 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:31:30,864 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2023-08-24 08:31:30,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:31:30,873 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:31:30,890 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2023-08-24 08:31:30,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:31:30,897 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:31:30,897 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:31:30,901 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:31:30,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30 WrapperNode [2023-08-24 08:31:30,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:31:30,902 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:31:30,902 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:31:30,902 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:31:30,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,912 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,930 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 353 [2023-08-24 08:31:30,930 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:31:30,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:31:30,931 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:31:30,931 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:31:30,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,945 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,948 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,952 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:31:30,953 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:31:30,953 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:31:30,953 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:31:30,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (1/1) ... [2023-08-24 08:31:30,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:31:30,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:31:30,979 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 08:31:30,993 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 08:31:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:31:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:31:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:31:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:31:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:31:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:31:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:31:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:31:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 08:31:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 08:31:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:31:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 08:31:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 08:31:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 08:31:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:31:31,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:31:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:31:31,005 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 08:31:31,078 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:31:31,079 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:31:31,365 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:31:31,468 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:31:31,468 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 08:31:31,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:31:31 BoogieIcfgContainer [2023-08-24 08:31:31,470 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:31:31,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:31:31,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:31:31,473 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:31:31,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:31:30" (1/3) ... [2023-08-24 08:31:31,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e58a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:31:31, skipping insertion in model container [2023-08-24 08:31:31,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:31:30" (2/3) ... [2023-08-24 08:31:31,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e58a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:31:31, skipping insertion in model container [2023-08-24 08:31:31,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:31:31" (3/3) ... [2023-08-24 08:31:31,475 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2023-08-24 08:31:31,485 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:31:31,485 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:31:31,486 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:31:31,529 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 08:31:31,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 270 transitions, 564 flow [2023-08-24 08:31:31,633 INFO L124 PetriNetUnfolderBase]: 27/267 cut-off events. [2023-08-24 08:31:31,634 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:31:31,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 267 events. 27/267 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 227. Up to 6 conditions per place. [2023-08-24 08:31:31,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 270 transitions, 564 flow [2023-08-24 08:31:31,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 240 places, 257 transitions, 532 flow [2023-08-24 08:31:31,648 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:31:31,656 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 240 places, 257 transitions, 532 flow [2023-08-24 08:31:31,661 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 240 places, 257 transitions, 532 flow [2023-08-24 08:31:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 257 transitions, 532 flow [2023-08-24 08:31:31,707 INFO L124 PetriNetUnfolderBase]: 27/257 cut-off events. [2023-08-24 08:31:31,707 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:31:31,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 257 events. 27/257 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 227. Up to 6 conditions per place. [2023-08-24 08:31:31,711 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-08-24 08:31:39,940 INFO L134 LiptonReduction]: Checked pairs total: 2527 [2023-08-24 08:31:39,940 INFO L136 LiptonReduction]: Total number of compositions: 278 [2023-08-24 08:31:39,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:31:39,952 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;@419194d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:31:39,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 08:31:39,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:31:39,957 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2023-08-24 08:31:39,957 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:31:39,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:31:39,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:31:39,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:31:39,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:31:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1739766142, now seen corresponding path program 1 times [2023-08-24 08:31:39,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:31:39,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301613195] [2023-08-24 08:31:39,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:31:39,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:31:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:31:40,290 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 08:31:40,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:31:40,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301613195] [2023-08-24 08:31:40,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301613195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:31:40,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:31:40,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 08:31:40,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718715924] [2023-08-24 08:31:40,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:31:40,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 08:31:40,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:31:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 08:31:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 08:31:40,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 548 [2023-08-24 08:31:40,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 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 08:31:40,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:31:40,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 548 [2023-08-24 08:31:40,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:31:40,403 INFO L124 PetriNetUnfolderBase]: 164/251 cut-off events. [2023-08-24 08:31:40,403 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-24 08:31:40,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 251 events. 164/251 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 605 event pairs, 37 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 376. Up to 167 conditions per place. [2023-08-24 08:31:40,405 INFO L140 encePairwiseOnDemand]: 543/548 looper letters, 36 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2023-08-24 08:31:40,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 197 flow [2023-08-24 08:31:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:31:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:31:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 759 transitions. [2023-08-24 08:31:40,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46167883211678834 [2023-08-24 08:31:40,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 759 transitions. [2023-08-24 08:31:40,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 759 transitions. [2023-08-24 08:31:40,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:31:40,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 759 transitions. [2023-08-24 08:31:40,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 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 08:31:40,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 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 08:31:40,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 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 08:31:40,431 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 68 flow. Second operand 3 states and 759 transitions. [2023-08-24 08:31:40,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 197 flow [2023-08-24 08:31:40,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 175 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 08:31:40,434 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 82 flow [2023-08-24 08:31:40,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2023-08-24 08:31:40,437 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-08-24 08:31:40,437 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 82 flow [2023-08-24 08:31:40,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 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 08:31:40,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:31:40,438 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] [2023-08-24 08:31:40,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:31:40,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:31:40,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:31:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash 199985878, now seen corresponding path program 1 times [2023-08-24 08:31:40,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:31:40,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429252457] [2023-08-24 08:31:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:31:40,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:31:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:31:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:31:40,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:31:40,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429252457] [2023-08-24 08:31:40,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429252457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:31:40,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:31:40,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 08:31:40,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687559403] [2023-08-24 08:31:40,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:31:40,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 08:31:40,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:31:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 08:31:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 08:31:40,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 548 [2023-08-24 08:31:40,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 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 08:31:40,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:31:40,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 548 [2023-08-24 08:31:40,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:31:40,842 INFO L124 PetriNetUnfolderBase]: 146/229 cut-off events. [2023-08-24 08:31:40,842 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-24 08:31:40,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 229 events. 146/229 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 552 event pairs, 37 based on Foata normal form. 14/240 useless extension candidates. Maximal degree in co-relation 175. Up to 145 conditions per place. [2023-08-24 08:31:40,845 INFO L140 encePairwiseOnDemand]: 544/548 looper letters, 34 selfloop transitions, 3 changer transitions 1/38 dead transitions. [2023-08-24 08:31:40,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 179 flow [2023-08-24 08:31:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:31:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:31:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2023-08-24 08:31:40,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416058394160584 [2023-08-24 08:31:40,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2023-08-24 08:31:40,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2023-08-24 08:31:40,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:31:40,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2023-08-24 08:31:40,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 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 08:31:40,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 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 08:31:40,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 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 08:31:40,852 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 82 flow. Second operand 3 states and 726 transitions. [2023-08-24 08:31:40,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 179 flow [2023-08-24 08:31:40,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 38 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 08:31:40,854 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-08-24 08:31:40,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 08:31:40,855 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-08-24 08:31:40,855 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-08-24 08:31:40,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 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 08:31:40,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:31:40,860 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] [2023-08-24 08:31:40,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 08:31:40,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:31:40,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:31:40,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2146258767, now seen corresponding path program 1 times [2023-08-24 08:31:40,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:31:40,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610288241] [2023-08-24 08:31:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:31:40,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:31:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:31:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:31:41,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:31:41,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610288241] [2023-08-24 08:31:41,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610288241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:31:41,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:31:41,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 08:31:41,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261933905] [2023-08-24 08:31:41,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:31:41,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:31:41,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:31:41,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:31:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:31:41,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 548 [2023-08-24 08:31:41,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 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 08:31:41,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:31:41,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 548 [2023-08-24 08:31:41,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:31:41,156 INFO L124 PetriNetUnfolderBase]: 265/433 cut-off events. [2023-08-24 08:31:41,157 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2023-08-24 08:31:41,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 433 events. 265/433 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1290 event pairs, 174 based on Foata normal form. 28/453 useless extension candidates. Maximal degree in co-relation 358. Up to 230 conditions per place. [2023-08-24 08:31:41,158 INFO L140 encePairwiseOnDemand]: 540/548 looper letters, 48 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-08-24 08:31:41,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 55 transitions, 262 flow [2023-08-24 08:31:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:31:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:31:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1043 transitions. [2023-08-24 08:31:41,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38065693430656933 [2023-08-24 08:31:41,161 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1043 transitions. [2023-08-24 08:31:41,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1043 transitions. [2023-08-24 08:31:41,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:31:41,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1043 transitions. [2023-08-24 08:31:41,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.6) internal successors, (1043), 5 states have internal predecessors, (1043), 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 08:31:41,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 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 08:31:41,167 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 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 08:31:41,167 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 1043 transitions. [2023-08-24 08:31:41,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 55 transitions, 262 flow [2023-08-24 08:31:41,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 55 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 08:31:41,169 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 128 flow [2023-08-24 08:31:41,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-08-24 08:31:41,169 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-24 08:31:41,170 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 128 flow [2023-08-24 08:31:41,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 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 08:31:41,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:31:41,170 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] [2023-08-24 08:31:41,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 08:31:41,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:31:41,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:31:41,171 INFO L85 PathProgramCache]: Analyzing trace with hash 37571543, now seen corresponding path program 1 times [2023-08-24 08:31:41,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:31:41,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190487080] [2023-08-24 08:31:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:31:41,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:31:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:31:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:31:41,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:31:41,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190487080] [2023-08-24 08:31:41,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190487080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:31:41,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:31:41,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 08:31:41,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851266864] [2023-08-24 08:31:41,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:31:41,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:31:41,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:31:41,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:31:41,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:31:41,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 548 [2023-08-24 08:31:41,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 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 08:31:41,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:31:41,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 548 [2023-08-24 08:31:41,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:31:41,398 INFO L124 PetriNetUnfolderBase]: 263/445 cut-off events. [2023-08-24 08:31:41,398 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-24 08:31:41,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1098 conditions, 445 events. 263/445 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1358 event pairs, 114 based on Foata normal form. 44/485 useless extension candidates. Maximal degree in co-relation 888. Up to 257 conditions per place. [2023-08-24 08:31:41,400 INFO L140 encePairwiseOnDemand]: 545/548 looper letters, 49 selfloop transitions, 3 changer transitions 5/57 dead transitions. [2023-08-24 08:31:41,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 57 transitions, 312 flow [2023-08-24 08:31:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:31:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:31:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 971 transitions. [2023-08-24 08:31:41,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44297445255474455 [2023-08-24 08:31:41,402 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 971 transitions. [2023-08-24 08:31:41,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 971 transitions. [2023-08-24 08:31:41,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:31:41,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 971 transitions. [2023-08-24 08:31:41,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 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 08:31:41,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 548.0) internal successors, (2740), 5 states have internal predecessors, (2740), 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 08:31:41,425 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 548.0) internal successors, (2740), 5 states have internal predecessors, (2740), 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 08:31:41,425 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 128 flow. Second operand 4 states and 971 transitions. [2023-08-24 08:31:41,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 57 transitions, 312 flow [2023-08-24 08:31:41,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 57 transitions, 302 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 08:31:41,427 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 112 flow [2023-08-24 08:31:41,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-24 08:31:41,428 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-08-24 08:31:41,428 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 112 flow [2023-08-24 08:31:41,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 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 08:31:41,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:31:41,429 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] [2023-08-24 08:31:41,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 08:31:41,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:31:41,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:31:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1344404631, now seen corresponding path program 1 times [2023-08-24 08:31:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:31:41,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277394308] [2023-08-24 08:31:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:31:41,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:31:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:31:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:31:41,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:31:41,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277394308] [2023-08-24 08:31:41,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277394308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:31:41,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094844035] [2023-08-24 08:31:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:31:41,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:31:41,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:31:41,555 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 08:31:41,573 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 08:31:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:31:41,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 08:31:41,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:31:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:31:41,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:31:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:31:42,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094844035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:31:42,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:31:42,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-24 08:31:42,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516597570] [2023-08-24 08:31:42,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:31:42,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 08:31:42,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:31:42,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 08:31:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-24 08:31:42,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 548 [2023-08-24 08:31:42,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 242.0) internal successors, (1694), 7 states have internal predecessors, (1694), 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 08:31:42,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:31:42,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 548 [2023-08-24 08:31:42,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:31:42,138 INFO L124 PetriNetUnfolderBase]: 270/435 cut-off events. [2023-08-24 08:31:42,138 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-08-24 08:31:42,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 435 events. 270/435 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1359 event pairs, 53 based on Foata normal form. 1/434 useless extension candidates. Maximal degree in co-relation 1112. Up to 281 conditions per place. [2023-08-24 08:31:42,140 INFO L140 encePairwiseOnDemand]: 544/548 looper letters, 42 selfloop transitions, 4 changer transitions 3/49 dead transitions. [2023-08-24 08:31:42,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 49 transitions, 264 flow [2023-08-24 08:31:42,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:31:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:31:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 983 transitions. [2023-08-24 08:31:42,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44844890510948904 [2023-08-24 08:31:42,142 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 983 transitions. [2023-08-24 08:31:42,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 983 transitions. [2023-08-24 08:31:42,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:31:42,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 983 transitions. [2023-08-24 08:31:42,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.75) internal successors, (983), 4 states have internal predecessors, (983), 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 08:31:42,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 548.0) internal successors, (2740), 5 states have internal predecessors, (2740), 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 08:31:42,148 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 548.0) internal successors, (2740), 5 states have internal predecessors, (2740), 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 08:31:42,148 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 112 flow. Second operand 4 states and 983 transitions. [2023-08-24 08:31:42,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 49 transitions, 264 flow [2023-08-24 08:31:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 252 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-24 08:31:42,152 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 129 flow [2023-08-24 08:31:42,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-24 08:31:42,153 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-08-24 08:31:42,153 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 129 flow [2023-08-24 08:31:42,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 242.0) internal successors, (1694), 7 states have internal predecessors, (1694), 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 08:31:42,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:31:42,154 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] [2023-08-24 08:31:42,161 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 08:31:42,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:31:42,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:31:42,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:31:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1647722260, now seen corresponding path program 2 times [2023-08-24 08:31:42,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:31:42,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176560316] [2023-08-24 08:31:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:31:42,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:31:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:31:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:31:42,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:31:42,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176560316] [2023-08-24 08:31:42,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176560316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:31:42,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061646942] [2023-08-24 08:31:42,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:31:42,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:31:42,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:31:42,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:31:42,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 08:31:42,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:31:42,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:31:42,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:31:42,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:31:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:31:42,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:31:43,112 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:31:43,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 266 treesize of output 272 [2023-08-24 08:31:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:31:43,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061646942] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:31:43,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:31:43,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-08-24 08:31:43,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848294573] [2023-08-24 08:31:43,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:31:43,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:31:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:31:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:31:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:31:43,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 548 [2023-08-24 08:31:43,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 129 flow. Second operand has 12 states, 12 states have (on average 181.83333333333334) internal successors, (2182), 12 states have internal predecessors, (2182), 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 08:31:43,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:31:43,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 548 [2023-08-24 08:31:43,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:31:43,695 INFO L124 PetriNetUnfolderBase]: 387/656 cut-off events. [2023-08-24 08:31:43,695 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-08-24 08:31:43,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1724 conditions, 656 events. 387/656 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2455 event pairs, 104 based on Foata normal form. 56/706 useless extension candidates. Maximal degree in co-relation 1702. Up to 196 conditions per place. [2023-08-24 08:31:43,697 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 58 selfloop transitions, 12 changer transitions 14/84 dead transitions. [2023-08-24 08:31:43,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 84 transitions, 445 flow [2023-08-24 08:31:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:31:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:31:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1676 transitions. [2023-08-24 08:31:43,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3398215733982157 [2023-08-24 08:31:43,701 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1676 transitions. [2023-08-24 08:31:43,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1676 transitions. [2023-08-24 08:31:43,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:31:43,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1676 transitions. [2023-08-24 08:31:43,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 186.22222222222223) internal successors, (1676), 9 states have internal predecessors, (1676), 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 08:31:43,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 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 08:31:43,710 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 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 08:31:43,710 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 129 flow. Second operand 9 states and 1676 transitions. [2023-08-24 08:31:43,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 84 transitions, 445 flow [2023-08-24 08:31:43,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 84 transitions, 432 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 08:31:43,713 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 193 flow [2023-08-24 08:31:43,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=193, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-24 08:31:43,714 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2023-08-24 08:31:43,714 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 193 flow [2023-08-24 08:31:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 181.83333333333334) internal successors, (2182), 12 states have internal predecessors, (2182), 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 08:31:43,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:31:43,715 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 08:31:43,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 08:31:43,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 08:31:43,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:31:43,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:31:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash -933323693, now seen corresponding path program 1 times [2023-08-24 08:31:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:31:43,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525108911] [2023-08-24 08:31:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:31:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:31:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:31:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:31:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:31:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525108911] [2023-08-24 08:31:44,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525108911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:31:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671955016] [2023-08-24 08:31:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:31:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:31:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:31:44,741 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:31:44,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 08:31:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:31:44,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 08:31:44,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:31:44,923 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 08:31:45,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:31:45,059 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:31:45,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:31:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:31:45,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:31:47,802 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:31:47,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2023-08-24 08:31:47,813 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 08:31:47,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 398 treesize of output 369 [2023-08-24 08:31:47,827 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:31:47,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 154 [2023-08-24 08:31:47,834 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:31:47,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 106 [2023-08-24 08:31:47,842 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:31:47,842 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2023-08-24 08:31:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:31:47,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671955016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:31:47,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:31:47,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 08:31:47,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202346954] [2023-08-24 08:31:47,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:31:47,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 08:31:47,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:31:47,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 08:31:47,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=447, Unknown=8, NotChecked=0, Total=600 [2023-08-24 08:31:47,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 548 [2023-08-24 08:31:47,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 193 flow. Second operand has 25 states, 25 states have (on average 144.32) internal successors, (3608), 25 states have internal predecessors, (3608), 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 08:31:47,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:31:47,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 548 [2023-08-24 08:31:47,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:31:51,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:31:53,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:01,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:03,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:05,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:07,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:09,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:11,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:13,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:15,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:17,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:19,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:21,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:23,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:25,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:27,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:29,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:31,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:33,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:35,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:37,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:32:37,659 INFO L124 PetriNetUnfolderBase]: 1130/1956 cut-off events. [2023-08-24 08:32:37,659 INFO L125 PetriNetUnfolderBase]: For 2275/2275 co-relation queries the response was YES. [2023-08-24 08:32:37,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 1956 events. 1130/1956 cut-off events. For 2275/2275 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10245 event pairs, 254 based on Foata normal form. 5/1948 useless extension candidates. Maximal degree in co-relation 3696. Up to 599 conditions per place. [2023-08-24 08:32:37,667 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 96 selfloop transitions, 51 changer transitions 55/202 dead transitions. [2023-08-24 08:32:37,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 202 transitions, 1198 flow [2023-08-24 08:32:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:32:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:32:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3450 transitions. [2023-08-24 08:32:37,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2737226277372263 [2023-08-24 08:32:37,688 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3450 transitions. [2023-08-24 08:32:37,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3450 transitions. [2023-08-24 08:32:37,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:37,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3450 transitions. [2023-08-24 08:32:37,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 150.0) internal successors, (3450), 23 states have internal predecessors, (3450), 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 08:32:37,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 548.0) internal successors, (13152), 24 states have internal predecessors, (13152), 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 08:32:37,706 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 548.0) internal successors, (13152), 24 states have internal predecessors, (13152), 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 08:32:37,706 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 193 flow. Second operand 23 states and 3450 transitions. [2023-08-24 08:32:37,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 202 transitions, 1198 flow [2023-08-24 08:32:37,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 202 transitions, 1180 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-24 08:32:37,713 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 696 flow [2023-08-24 08:32:37,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=696, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2023-08-24 08:32:37,713 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2023-08-24 08:32:37,713 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 696 flow [2023-08-24 08:32:37,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 144.32) internal successors, (3608), 25 states have internal predecessors, (3608), 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 08:32:37,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:37,715 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, 1] [2023-08-24 08:32:37,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 08:32:37,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:37,921 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:32:37,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:37,922 INFO L85 PathProgramCache]: Analyzing trace with hash -467035436, now seen corresponding path program 1 times [2023-08-24 08:32:37,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:37,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674549539] [2023-08-24 08:32:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:37,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:32:38,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:38,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674549539] [2023-08-24 08:32:38,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674549539] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:38,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153389985] [2023-08-24 08:32:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:38,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:38,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:38,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:32:38,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 08:32:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:38,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:32:38,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:32:38,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:38,999 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:39,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 505 treesize of output 536 [2023-08-24 08:32:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:32:39,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153389985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:39,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:39,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2023-08-24 08:32:39,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023996011] [2023-08-24 08:32:39,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:39,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:32:39,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:39,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:32:39,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:32:39,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 548 [2023-08-24 08:32:39,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 696 flow. Second operand has 11 states, 11 states have (on average 201.0) internal successors, (2211), 11 states have internal predecessors, (2211), 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 08:32:39,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:39,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 548 [2023-08-24 08:32:39,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:40,021 INFO L124 PetriNetUnfolderBase]: 1176/2062 cut-off events. [2023-08-24 08:32:40,021 INFO L125 PetriNetUnfolderBase]: For 3703/3703 co-relation queries the response was YES. [2023-08-24 08:32:40,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6324 conditions, 2062 events. 1176/2062 cut-off events. For 3703/3703 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11004 event pairs, 328 based on Foata normal form. 60/2120 useless extension candidates. Maximal degree in co-relation 5795. Up to 668 conditions per place. [2023-08-24 08:32:40,030 INFO L140 encePairwiseOnDemand]: 544/548 looper letters, 79 selfloop transitions, 19 changer transitions 13/111 dead transitions. [2023-08-24 08:32:40,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 978 flow [2023-08-24 08:32:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:32:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:32:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1038 transitions. [2023-08-24 08:32:40,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3788321167883212 [2023-08-24 08:32:40,032 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1038 transitions. [2023-08-24 08:32:40,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1038 transitions. [2023-08-24 08:32:40,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:40,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1038 transitions. [2023-08-24 08:32:40,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.6) internal successors, (1038), 5 states have internal predecessors, (1038), 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 08:32:40,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 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 08:32:40,036 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 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 08:32:40,036 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 696 flow. Second operand 5 states and 1038 transitions. [2023-08-24 08:32:40,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 978 flow [2023-08-24 08:32:40,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 111 transitions, 916 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-08-24 08:32:40,045 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 661 flow [2023-08-24 08:32:40,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2023-08-24 08:32:40,046 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2023-08-24 08:32:40,046 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 661 flow [2023-08-24 08:32:40,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 201.0) internal successors, (2211), 11 states have internal predecessors, (2211), 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 08:32:40,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:40,056 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] [2023-08-24 08:32:40,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 08:32:40,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:40,260 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:32:40,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:40,261 INFO L85 PathProgramCache]: Analyzing trace with hash -849818863, now seen corresponding path program 2 times [2023-08-24 08:32:40,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:40,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404296064] [2023-08-24 08:32:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:40,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:32:40,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:40,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404296064] [2023-08-24 08:32:40,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404296064] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:40,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867184443] [2023-08-24 08:32:40,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:32:40,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:40,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:40,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:32:40,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 08:32:40,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:40,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:40,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 08:32:40,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:32:41,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:41,585 INFO L322 Elim1Store]: treesize reduction 38, result has 77.5 percent of original size [2023-08-24 08:32:41,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 550 treesize of output 600 [2023-08-24 08:32:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:32:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867184443] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:42,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:42,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-08-24 08:32:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084406597] [2023-08-24 08:32:42,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:42,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:32:42,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:32:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:32:42,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 548 [2023-08-24 08:32:42,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 661 flow. Second operand has 14 states, 14 states have (on average 162.78571428571428) internal successors, (2279), 14 states have internal predecessors, (2279), 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 08:32:42,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:42,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 548 [2023-08-24 08:32:42,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:43,019 INFO L124 PetriNetUnfolderBase]: 1885/3272 cut-off events. [2023-08-24 08:32:43,019 INFO L125 PetriNetUnfolderBase]: For 6456/6456 co-relation queries the response was YES. [2023-08-24 08:32:43,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10279 conditions, 3272 events. 1885/3272 cut-off events. For 6456/6456 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18676 event pairs, 442 based on Foata normal form. 80/3350 useless extension candidates. Maximal degree in co-relation 9977. Up to 588 conditions per place. [2023-08-24 08:32:43,034 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 118 selfloop transitions, 46 changer transitions 50/214 dead transitions. [2023-08-24 08:32:43,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 214 transitions, 1623 flow [2023-08-24 08:32:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:32:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:32:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2867 transitions. [2023-08-24 08:32:43,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.307750107342207 [2023-08-24 08:32:43,040 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2867 transitions. [2023-08-24 08:32:43,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2867 transitions. [2023-08-24 08:32:43,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:43,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2867 transitions. [2023-08-24 08:32:43,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 168.64705882352942) internal successors, (2867), 17 states have internal predecessors, (2867), 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 08:32:43,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 548.0) internal successors, (9864), 18 states have internal predecessors, (9864), 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 08:32:43,051 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 548.0) internal successors, (9864), 18 states have internal predecessors, (9864), 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 08:32:43,052 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 661 flow. Second operand 17 states and 2867 transitions. [2023-08-24 08:32:43,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 214 transitions, 1623 flow [2023-08-24 08:32:43,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 214 transitions, 1585 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 08:32:43,067 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 800 flow [2023-08-24 08:32:43,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=800, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2023-08-24 08:32:43,068 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2023-08-24 08:32:43,068 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 800 flow [2023-08-24 08:32:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 162.78571428571428) internal successors, (2279), 14 states have internal predecessors, (2279), 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 08:32:43,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:43,069 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] [2023-08-24 08:32:43,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 08:32:43,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:43,275 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:32:43,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:43,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1618807600, now seen corresponding path program 1 times [2023-08-24 08:32:43,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:43,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309450392] [2023-08-24 08:32:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:43,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:32:44,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309450392] [2023-08-24 08:32:44,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309450392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743729586] [2023-08-24 08:32:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:44,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:44,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:32:44,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 08:32:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:44,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 08:32:44,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:32:44,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:45,473 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:45,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 355 treesize of output 462 [2023-08-24 08:32:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 08:32:48,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743729586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:48,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:48,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 3] total 14 [2023-08-24 08:32:48,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972381588] [2023-08-24 08:32:48,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:48,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:32:48,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:32:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:32:48,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 548 [2023-08-24 08:32:48,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 800 flow. Second operand has 16 states, 16 states have (on average 157.4375) internal successors, (2519), 16 states have internal predecessors, (2519), 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 08:32:48,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:48,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 548 [2023-08-24 08:32:48,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:49,803 INFO L124 PetriNetUnfolderBase]: 2025/3477 cut-off events. [2023-08-24 08:32:49,803 INFO L125 PetriNetUnfolderBase]: For 9859/9859 co-relation queries the response was YES. [2023-08-24 08:32:49,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12057 conditions, 3477 events. 2025/3477 cut-off events. For 9859/9859 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20182 event pairs, 548 based on Foata normal form. 6/3482 useless extension candidates. Maximal degree in co-relation 11938. Up to 1231 conditions per place. [2023-08-24 08:32:49,818 INFO L140 encePairwiseOnDemand]: 537/548 looper letters, 74 selfloop transitions, 64 changer transitions 32/170 dead transitions. [2023-08-24 08:32:49,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 170 transitions, 1616 flow [2023-08-24 08:32:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:32:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:32:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2416 transitions. [2023-08-24 08:32:49,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29391727493917275 [2023-08-24 08:32:49,823 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2416 transitions. [2023-08-24 08:32:49,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2416 transitions. [2023-08-24 08:32:49,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:49,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2416 transitions. [2023-08-24 08:32:49,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 161.06666666666666) internal successors, (2416), 15 states have internal predecessors, (2416), 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 08:32:49,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 548.0) internal successors, (8768), 16 states have internal predecessors, (8768), 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 08:32:49,832 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 548.0) internal successors, (8768), 16 states have internal predecessors, (8768), 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 08:32:49,832 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 800 flow. Second operand 15 states and 2416 transitions. [2023-08-24 08:32:49,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 170 transitions, 1616 flow [2023-08-24 08:32:49,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 170 transitions, 1504 flow, removed 32 selfloop flow, removed 9 redundant places. [2023-08-24 08:32:49,850 INFO L231 Difference]: Finished difference. Result has 96 places, 103 transitions, 1133 flow [2023-08-24 08:32:49,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1133, PETRI_PLACES=96, PETRI_TRANSITIONS=103} [2023-08-24 08:32:49,851 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2023-08-24 08:32:49,851 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 103 transitions, 1133 flow [2023-08-24 08:32:49,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 157.4375) internal successors, (2519), 16 states have internal predecessors, (2519), 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 08:32:49,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:49,852 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] [2023-08-24 08:32:49,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 08:32:50,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:50,057 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:32:50,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash 64797100, now seen corresponding path program 1 times [2023-08-24 08:32:50,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:50,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853252754] [2023-08-24 08:32:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:50,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:32:50,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:50,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853252754] [2023-08-24 08:32:50,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853252754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:50,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395825562] [2023-08-24 08:32:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:50,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:50,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:50,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:32:50,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 08:32:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:50,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 08:32:50,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:32:50,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:51,622 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:51,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 399 treesize of output 506 [2023-08-24 08:32:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:32:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395825562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:52,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:52,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-24 08:32:52,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270173833] [2023-08-24 08:32:52,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:52,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:32:52,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:52,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:32:52,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:32:52,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 548 [2023-08-24 08:32:52,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 1133 flow. Second operand has 15 states, 15 states have (on average 168.4) internal successors, (2526), 15 states have internal predecessors, (2526), 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 08:32:52,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:52,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 548 [2023-08-24 08:32:52,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:53,578 INFO L124 PetriNetUnfolderBase]: 2240/4015 cut-off events. [2023-08-24 08:32:53,578 INFO L125 PetriNetUnfolderBase]: For 14957/14957 co-relation queries the response was YES. [2023-08-24 08:32:53,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13183 conditions, 4015 events. 2240/4015 cut-off events. For 14957/14957 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25384 event pairs, 587 based on Foata normal form. 196/4210 useless extension candidates. Maximal degree in co-relation 12178. Up to 742 conditions per place. [2023-08-24 08:32:53,598 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 98 selfloop transitions, 54 changer transitions 59/211 dead transitions. [2023-08-24 08:32:53,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 211 transitions, 2064 flow [2023-08-24 08:32:53,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:32:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:32:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2598 transitions. [2023-08-24 08:32:53,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31605839416058396 [2023-08-24 08:32:53,602 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2598 transitions. [2023-08-24 08:32:53,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2598 transitions. [2023-08-24 08:32:53,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:53,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2598 transitions. [2023-08-24 08:32:53,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 173.2) internal successors, (2598), 15 states have internal predecessors, (2598), 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 08:32:53,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 548.0) internal successors, (8768), 16 states have internal predecessors, (8768), 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 08:32:53,612 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 548.0) internal successors, (8768), 16 states have internal predecessors, (8768), 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 08:32:53,612 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 1133 flow. Second operand 15 states and 2598 transitions. [2023-08-24 08:32:53,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 211 transitions, 2064 flow [2023-08-24 08:32:53,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 211 transitions, 1873 flow, removed 69 selfloop flow, removed 8 redundant places. [2023-08-24 08:32:53,665 INFO L231 Difference]: Finished difference. Result has 103 places, 98 transitions, 1087 flow [2023-08-24 08:32:53,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1087, PETRI_PLACES=103, PETRI_TRANSITIONS=98} [2023-08-24 08:32:53,665 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2023-08-24 08:32:53,665 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 98 transitions, 1087 flow [2023-08-24 08:32:53,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.4) internal successors, (2526), 15 states have internal predecessors, (2526), 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 08:32:53,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:53,666 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 08:32:53,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 08:32:53,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:53,872 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:32:53,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1168906538, now seen corresponding path program 2 times [2023-08-24 08:32:53,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:53,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248833510] [2023-08-24 08:32:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:32:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248833510] [2023-08-24 08:32:54,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248833510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667505403] [2023-08-24 08:32:54,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:32:54,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:54,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:54,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:32:54,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 08:32:54,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:54,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:54,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 08:32:54,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:32:54,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:56,631 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:56,631 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 399 treesize of output 597 [2023-08-24 08:32:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:32:59,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667505403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:59,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:59,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 08:32:59,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753036487] [2023-08-24 08:32:59,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:59,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:32:59,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:59,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:32:59,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:32:59,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 548 [2023-08-24 08:32:59,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 98 transitions, 1087 flow. Second operand has 18 states, 18 states have (on average 156.77777777777777) internal successors, (2822), 18 states have internal predecessors, (2822), 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 08:32:59,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:59,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 548 [2023-08-24 08:32:59,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:01,441 INFO L124 PetriNetUnfolderBase]: 1510/2713 cut-off events. [2023-08-24 08:33:01,441 INFO L125 PetriNetUnfolderBase]: For 7388/7388 co-relation queries the response was YES. [2023-08-24 08:33:01,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8653 conditions, 2713 events. 1510/2713 cut-off events. For 7388/7388 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15745 event pairs, 355 based on Foata normal form. 56/2769 useless extension candidates. Maximal degree in co-relation 7891. Up to 504 conditions per place. [2023-08-24 08:33:01,450 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 89 selfloop transitions, 49 changer transitions 41/179 dead transitions. [2023-08-24 08:33:01,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 179 transitions, 1665 flow [2023-08-24 08:33:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:33:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:33:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1969 transitions. [2023-08-24 08:33:01,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2994221411192214 [2023-08-24 08:33:01,453 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1969 transitions. [2023-08-24 08:33:01,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1969 transitions. [2023-08-24 08:33:01,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:01,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1969 transitions. [2023-08-24 08:33:01,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 164.08333333333334) internal successors, (1969), 12 states have internal predecessors, (1969), 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 08:33:01,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 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 08:33:01,459 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 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 08:33:01,459 INFO L175 Difference]: Start difference. First operand has 103 places, 98 transitions, 1087 flow. Second operand 12 states and 1969 transitions. [2023-08-24 08:33:01,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 179 transitions, 1665 flow [2023-08-24 08:33:01,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 179 transitions, 1558 flow, removed 19 selfloop flow, removed 7 redundant places. [2023-08-24 08:33:01,477 INFO L231 Difference]: Finished difference. Result has 105 places, 97 transitions, 1088 flow [2023-08-24 08:33:01,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1088, PETRI_PLACES=105, PETRI_TRANSITIONS=97} [2023-08-24 08:33:01,477 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 76 predicate places. [2023-08-24 08:33:01,477 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 97 transitions, 1088 flow [2023-08-24 08:33:01,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 156.77777777777777) internal successors, (2822), 18 states have internal predecessors, (2822), 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 08:33:01,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:01,478 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 08:33:01,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-24 08:33:01,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 08:33:01,682 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:33:01,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1023992225, now seen corresponding path program 1 times [2023-08-24 08:33:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:01,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398158077] [2023-08-24 08:33:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:01,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:33:02,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:02,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398158077] [2023-08-24 08:33:02,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398158077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:02,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157029951] [2023-08-24 08:33:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:02,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:02,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:02,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:33:02,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 08:33:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:02,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 08:33:02,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:33:02,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:04,656 INFO L322 Elim1Store]: treesize reduction 122, result has 73.2 percent of original size [2023-08-24 08:33:04,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 897 treesize of output 1054 [2023-08-24 08:33:21,915 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:33:30,629 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:33:33,914 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:33:38,899 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:33:52,662 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:30,622 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:32,346 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:33,933 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:36,380 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:37,784 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:40,990 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:42,290 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:42,860 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:44,773 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:50,934 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:55,976 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:56,367 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:34:57,462 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:35:00,102 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-24 08:35:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:35:08,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157029951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:08,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:08,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-08-24 08:35:08,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587276713] [2023-08-24 08:35:08,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:08,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 08:35:08,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 08:35:08,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-08-24 08:35:08,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 548 [2023-08-24 08:35:08,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 97 transitions, 1088 flow. Second operand has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 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 08:35:08,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:08,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 548 [2023-08-24 08:35:08,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:09,524 INFO L124 PetriNetUnfolderBase]: 2972/5322 cut-off events. [2023-08-24 08:35:09,524 INFO L125 PetriNetUnfolderBase]: For 16318/16318 co-relation queries the response was YES. [2023-08-24 08:35:09,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16925 conditions, 5322 events. 2972/5322 cut-off events. For 16318/16318 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 35370 event pairs, 682 based on Foata normal form. 6/5328 useless extension candidates. Maximal degree in co-relation 14849. Up to 994 conditions per place. [2023-08-24 08:35:09,542 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 82 selfloop transitions, 105 changer transitions 54/241 dead transitions. [2023-08-24 08:35:09,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 241 transitions, 2490 flow [2023-08-24 08:35:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:35:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:35:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2541 transitions. [2023-08-24 08:35:09,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2727565478746243 [2023-08-24 08:35:09,555 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2541 transitions. [2023-08-24 08:35:09,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2541 transitions. [2023-08-24 08:35:09,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:09,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2541 transitions. [2023-08-24 08:35:09,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 149.47058823529412) internal successors, (2541), 17 states have internal predecessors, (2541), 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 08:35:09,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 548.0) internal successors, (9864), 18 states have internal predecessors, (9864), 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 08:35:09,564 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 548.0) internal successors, (9864), 18 states have internal predecessors, (9864), 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 08:35:09,564 INFO L175 Difference]: Start difference. First operand has 105 places, 97 transitions, 1088 flow. Second operand 17 states and 2541 transitions. [2023-08-24 08:35:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 241 transitions, 2490 flow [2023-08-24 08:35:09,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 241 transitions, 2385 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-08-24 08:35:09,622 INFO L231 Difference]: Finished difference. Result has 117 places, 146 transitions, 1939 flow [2023-08-24 08:35:09,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1939, PETRI_PLACES=117, PETRI_TRANSITIONS=146} [2023-08-24 08:35:09,622 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 88 predicate places. [2023-08-24 08:35:09,622 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 146 transitions, 1939 flow [2023-08-24 08:35:09,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 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 08:35:09,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:09,623 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 08:35:09,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 08:35:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 08:35:09,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:35:09,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash 453042593, now seen corresponding path program 2 times [2023-08-24 08:35:09,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:09,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063133402] [2023-08-24 08:35:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:35:10,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:10,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063133402] [2023-08-24 08:35:10,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063133402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539775580] [2023-08-24 08:35:10,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:35:10,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:10,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:10,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:35:10,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 08:35:10,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:35:10,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:35:10,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 08:35:10,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:35:10,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:21,952 WARN L234 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 91 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:35:22,777 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:22,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 590 treesize of output 1295 [2023-08-24 08:35:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:35:54,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539775580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:54,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:54,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-24 08:35:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701556215] [2023-08-24 08:35:54,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:54,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:35:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:35:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:35:54,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 548 [2023-08-24 08:35:54,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 146 transitions, 1939 flow. Second operand has 16 states, 16 states have (on average 185.25) internal successors, (2964), 16 states have internal predecessors, (2964), 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 08:35:54,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:54,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 548 [2023-08-24 08:35:54,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:56,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:35:57,319 INFO L124 PetriNetUnfolderBase]: 3212/5712 cut-off events. [2023-08-24 08:35:57,319 INFO L125 PetriNetUnfolderBase]: For 19432/19432 co-relation queries the response was YES. [2023-08-24 08:35:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19096 conditions, 5712 events. 3212/5712 cut-off events. For 19432/19432 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 37786 event pairs, 666 based on Foata normal form. 40/5752 useless extension candidates. Maximal degree in co-relation 15999. Up to 1498 conditions per place. [2023-08-24 08:35:57,341 INFO L140 encePairwiseOnDemand]: 544/548 looper letters, 129 selfloop transitions, 77 changer transitions 28/234 dead transitions. [2023-08-24 08:35:57,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 234 transitions, 2707 flow [2023-08-24 08:35:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:35:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:35:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2130 transitions. [2023-08-24 08:35:57,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533510285335103 [2023-08-24 08:35:57,344 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2130 transitions. [2023-08-24 08:35:57,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2130 transitions. [2023-08-24 08:35:57,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:57,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2130 transitions. [2023-08-24 08:35:57,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 193.63636363636363) internal successors, (2130), 11 states have internal predecessors, (2130), 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 08:35:57,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 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 08:35:57,350 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 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 08:35:57,350 INFO L175 Difference]: Start difference. First operand has 117 places, 146 transitions, 1939 flow. Second operand 11 states and 2130 transitions. [2023-08-24 08:35:57,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 234 transitions, 2707 flow [2023-08-24 08:35:57,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 234 transitions, 2426 flow, removed 71 selfloop flow, removed 9 redundant places. [2023-08-24 08:35:57,425 INFO L231 Difference]: Finished difference. Result has 118 places, 150 transitions, 1881 flow [2023-08-24 08:35:57,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1881, PETRI_PLACES=118, PETRI_TRANSITIONS=150} [2023-08-24 08:35:57,426 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2023-08-24 08:35:57,426 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 150 transitions, 1881 flow [2023-08-24 08:35:57,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 185.25) internal successors, (2964), 16 states have internal predecessors, (2964), 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 08:35:57,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:57,426 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 08:35:57,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 08:35:57,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 08:35:57,631 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:35:57,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash 376745101, now seen corresponding path program 3 times [2023-08-24 08:35:57,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:57,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099816940] [2023-08-24 08:35:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:57,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 08:35:57,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099816940] [2023-08-24 08:35:57,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099816940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463156564] [2023-08-24 08:35:57,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:35:57,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:57,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:57,948 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:35:57,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 08:35:58,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:35:58,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:35:58,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 08:35:58,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:35:58,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:59,305 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:59,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 416 treesize of output 607 [2023-08-24 08:36:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:36:04,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463156564] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:04,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:04,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-08-24 08:36:04,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815717535] [2023-08-24 08:36:04,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:04,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:36:04,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:04,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:36:04,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:36:04,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 548 [2023-08-24 08:36:04,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 150 transitions, 1881 flow. Second operand has 19 states, 19 states have (on average 150.57894736842104) internal successors, (2861), 19 states have internal predecessors, (2861), 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 08:36:04,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:04,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 548 [2023-08-24 08:36:04,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:36:06,015 INFO L124 PetriNetUnfolderBase]: 3352/5969 cut-off events. [2023-08-24 08:36:06,016 INFO L125 PetriNetUnfolderBase]: For 19752/19752 co-relation queries the response was YES. [2023-08-24 08:36:06,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19662 conditions, 5969 events. 3352/5969 cut-off events. For 19752/19752 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 39555 event pairs, 2148 based on Foata normal form. 48/6017 useless extension candidates. Maximal degree in co-relation 16506. Up to 3972 conditions per place. [2023-08-24 08:36:06,035 INFO L140 encePairwiseOnDemand]: 541/548 looper letters, 143 selfloop transitions, 18 changer transitions 56/217 dead transitions. [2023-08-24 08:36:06,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 217 transitions, 2537 flow [2023-08-24 08:36:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:36:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:36:06,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1867 transitions. [2023-08-24 08:36:06,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28391119221411193 [2023-08-24 08:36:06,037 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1867 transitions. [2023-08-24 08:36:06,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1867 transitions. [2023-08-24 08:36:06,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:36:06,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1867 transitions. [2023-08-24 08:36:06,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 155.58333333333334) internal successors, (1867), 12 states have internal predecessors, (1867), 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 08:36:06,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 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 08:36:06,042 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 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 08:36:06,042 INFO L175 Difference]: Start difference. First operand has 118 places, 150 transitions, 1881 flow. Second operand 12 states and 1867 transitions. [2023-08-24 08:36:06,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 217 transitions, 2537 flow [2023-08-24 08:36:06,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 217 transitions, 2324 flow, removed 34 selfloop flow, removed 7 redundant places. [2023-08-24 08:36:06,088 INFO L231 Difference]: Finished difference. Result has 124 places, 126 transitions, 1393 flow [2023-08-24 08:36:06,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1393, PETRI_PLACES=124, PETRI_TRANSITIONS=126} [2023-08-24 08:36:06,089 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2023-08-24 08:36:06,089 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 126 transitions, 1393 flow [2023-08-24 08:36:06,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 150.57894736842104) internal successors, (2861), 19 states have internal predecessors, (2861), 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 08:36:06,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:06,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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 08:36:06,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-24 08:36:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 08:36:06,294 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:36:06,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash 214733442, now seen corresponding path program 1 times [2023-08-24 08:36:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:06,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615303329] [2023-08-24 08:36:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:06,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:36:06,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:06,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615303329] [2023-08-24 08:36:06,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615303329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:06,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993345430] [2023-08-24 08:36:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:06,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:06,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:06,708 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:36:06,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 08:36:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:06,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 08:36:06,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:36:07,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:36:08,964 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:08,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 491 treesize of output 864 [2023-08-24 08:36:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:36:12,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993345430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:12,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:12,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-24 08:36:12,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944463489] [2023-08-24 08:36:12,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:12,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:36:12,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:36:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:36:12,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 548 [2023-08-24 08:36:12,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 126 transitions, 1393 flow. Second operand has 15 states, 15 states have (on average 189.13333333333333) internal successors, (2837), 15 states have internal predecessors, (2837), 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 08:36:12,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:12,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 548 [2023-08-24 08:36:12,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:36:13,547 INFO L124 PetriNetUnfolderBase]: 2688/4783 cut-off events. [2023-08-24 08:36:13,547 INFO L125 PetriNetUnfolderBase]: For 13221/13221 co-relation queries the response was YES. [2023-08-24 08:36:13,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14902 conditions, 4783 events. 2688/4783 cut-off events. For 13221/13221 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30118 event pairs, 710 based on Foata normal form. 84/4867 useless extension candidates. Maximal degree in co-relation 14284. Up to 1261 conditions per place. [2023-08-24 08:36:13,565 INFO L140 encePairwiseOnDemand]: 544/548 looper letters, 94 selfloop transitions, 40 changer transitions 38/172 dead transitions. [2023-08-24 08:36:13,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 172 transitions, 1880 flow [2023-08-24 08:36:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:36:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:36:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1562 transitions. [2023-08-24 08:36:13,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3562956204379562 [2023-08-24 08:36:13,578 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1562 transitions. [2023-08-24 08:36:13,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1562 transitions. [2023-08-24 08:36:13,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:36:13,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1562 transitions. [2023-08-24 08:36:13,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.25) internal successors, (1562), 8 states have internal predecessors, (1562), 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 08:36:13,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 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 08:36:13,583 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 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 08:36:13,583 INFO L175 Difference]: Start difference. First operand has 124 places, 126 transitions, 1393 flow. Second operand 8 states and 1562 transitions. [2023-08-24 08:36:13,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 172 transitions, 1880 flow [2023-08-24 08:36:13,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 172 transitions, 1811 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-08-24 08:36:13,618 INFO L231 Difference]: Finished difference. Result has 121 places, 107 transitions, 1193 flow [2023-08-24 08:36:13,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=121, PETRI_TRANSITIONS=107} [2023-08-24 08:36:13,619 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2023-08-24 08:36:13,619 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 107 transitions, 1193 flow [2023-08-24 08:36:13,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 189.13333333333333) internal successors, (2837), 15 states have internal predecessors, (2837), 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 08:36:13,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:13,619 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:36:13,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 08:36:13,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 08:36:13,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:36:13,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:13,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1142179609, now seen corresponding path program 4 times [2023-08-24 08:36:13,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:13,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112950412] [2023-08-24 08:36:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:13,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 08:36:14,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:14,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112950412] [2023-08-24 08:36:14,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112950412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:14,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696781204] [2023-08-24 08:36:14,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:36:14,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:14,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:14,300 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:36:14,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 08:36:14,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:36:14,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:36:14,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 08:36:14,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 08:36:14,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:36:15,077 INFO L322 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2023-08-24 08:36:15,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 261 treesize of output 263 [2023-08-24 08:36:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 08:36:15,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696781204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:15,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:15,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 08:36:15,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152480482] [2023-08-24 08:36:15,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:15,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:36:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:15,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:36:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:36:15,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 548 [2023-08-24 08:36:15,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 107 transitions, 1193 flow. Second operand has 19 states, 19 states have (on average 164.3684210526316) internal successors, (3123), 19 states have internal predecessors, (3123), 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 08:36:15,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:15,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 548 [2023-08-24 08:36:15,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:36:16,687 INFO L124 PetriNetUnfolderBase]: 4059/7024 cut-off events. [2023-08-24 08:36:16,691 INFO L125 PetriNetUnfolderBase]: For 21201/21201 co-relation queries the response was YES. [2023-08-24 08:36:16,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23417 conditions, 7024 events. 4059/7024 cut-off events. For 21201/21201 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 44341 event pairs, 1012 based on Foata normal form. 264/7288 useless extension candidates. Maximal degree in co-relation 20262. Up to 1316 conditions per place. [2023-08-24 08:36:16,717 INFO L140 encePairwiseOnDemand]: 540/548 looper letters, 216 selfloop transitions, 88 changer transitions 28/332 dead transitions. [2023-08-24 08:36:16,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 332 transitions, 3097 flow [2023-08-24 08:36:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:36:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:36:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4123 transitions. [2023-08-24 08:36:16,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3134884428223844 [2023-08-24 08:36:16,721 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4123 transitions. [2023-08-24 08:36:16,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4123 transitions. [2023-08-24 08:36:16,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:36:16,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4123 transitions. [2023-08-24 08:36:16,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 171.79166666666666) internal successors, (4123), 24 states have internal predecessors, (4123), 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 08:36:16,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 548.0) internal successors, (13700), 25 states have internal predecessors, (13700), 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 08:36:16,731 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 548.0) internal successors, (13700), 25 states have internal predecessors, (13700), 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 08:36:16,731 INFO L175 Difference]: Start difference. First operand has 121 places, 107 transitions, 1193 flow. Second operand 24 states and 4123 transitions. [2023-08-24 08:36:16,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 332 transitions, 3097 flow [2023-08-24 08:36:16,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 332 transitions, 2661 flow, removed 148 selfloop flow, removed 14 redundant places. [2023-08-24 08:36:16,766 INFO L231 Difference]: Finished difference. Result has 129 places, 142 transitions, 1554 flow [2023-08-24 08:36:16,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1554, PETRI_PLACES=129, PETRI_TRANSITIONS=142} [2023-08-24 08:36:16,767 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2023-08-24 08:36:16,767 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 142 transitions, 1554 flow [2023-08-24 08:36:16,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 164.3684210526316) internal successors, (3123), 19 states have internal predecessors, (3123), 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 08:36:16,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:16,767 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:36:16,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 08:36:16,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 08:36:16,972 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:36:16,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash 903427600, now seen corresponding path program 5 times [2023-08-24 08:36:16,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:16,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907309678] [2023-08-24 08:36:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:18,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:18,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907309678] [2023-08-24 08:36:18,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907309678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:18,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661699507] [2023-08-24 08:36:18,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:36:18,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:18,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:18,490 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:36:18,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 08:36:18,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:36:18,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:36:18,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 08:36:18,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:18,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:36:18,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:36:18,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:36:18,687 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-24 08:36:18,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 08:36:18,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 08:36:18,839 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:36:18,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-24 08:36:18,894 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:36:18,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 08:36:18,950 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:36:18,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:36:19,050 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:36:19,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:36:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:19,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:40:31,552 WARN L234 SmtUtils]: Spent 4.03m on a formula simplification. DAG size of input: 212 DAG size of output: 190 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:43:55,260 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-08-24 08:43:55,260 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 101 [2023-08-24 08:43:55,261 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-08-24 08:43:55,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 08:43:55,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:43:55,461 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:196) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:167) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:311) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:579) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 53 more [2023-08-24 08:43:55,464 INFO L158 Benchmark]: Toolchain (without parser) took 744766.50ms. Allocated memory was 356.5MB in the beginning and 1.2GB in the end (delta: 796.9MB). Free memory was 317.9MB in the beginning and 627.0MB in the end (delta: -309.0MB). Peak memory consumption was 489.4MB. Max. memory is 16.0GB. [2023-08-24 08:43:55,464 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 356.5MB. Free memory was 334.5MB in the beginning and 334.4MB in the end (delta: 91.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 08:43:55,464 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.05ms. Allocated memory is still 356.5MB. Free memory was 317.9MB in the beginning and 304.3MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 08:43:55,464 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.81ms. Allocated memory is still 356.5MB. Free memory was 304.3MB in the beginning and 302.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:43:55,465 INFO L158 Benchmark]: Boogie Preprocessor took 21.74ms. Allocated memory is still 356.5MB. Free memory was 302.2MB in the beginning and 300.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:43:55,466 INFO L158 Benchmark]: RCFGBuilder took 517.04ms. Allocated memory is still 356.5MB. Free memory was 300.1MB in the beginning and 249.7MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.0GB. [2023-08-24 08:43:55,466 INFO L158 Benchmark]: TraceAbstraction took 743992.54ms. Allocated memory was 356.5MB in the beginning and 1.2GB in the end (delta: 796.9MB). Free memory was 248.7MB in the beginning and 627.0MB in the end (delta: -378.3MB). Peak memory consumption was 422.3MB. Max. memory is 16.0GB. [2023-08-24 08:43:55,467 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 356.5MB. Free memory was 334.5MB in the beginning and 334.4MB in the end (delta: 91.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 202.05ms. Allocated memory is still 356.5MB. Free memory was 317.9MB in the beginning and 304.3MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.81ms. Allocated memory is still 356.5MB. Free memory was 304.3MB in the beginning and 302.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.74ms. Allocated memory is still 356.5MB. Free memory was 302.2MB in the beginning and 300.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 517.04ms. Allocated memory is still 356.5MB. Free memory was 300.1MB in the beginning and 249.7MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.0GB. * TraceAbstraction took 743992.54ms. Allocated memory was 356.5MB in the beginning and 1.2GB in the end (delta: 796.9MB). Free memory was 248.7MB in the beginning and 627.0MB in the end (delta: -378.3MB). Peak memory consumption was 422.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.3s, 240 PlacesBefore, 29 PlacesAfterwards, 257 TransitionsBefore, 25 TransitionsAfterwards, 2700 CoEnabledTransitionPairs, 7 FixpointIterations, 164 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 30 TrivialYvCompositions, 12 ConcurrentYvCompositions, 21 ChoiceCompositions, 278 TotalNumberOfCompositions, 2527 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2501, independent: 2491, independent conditional: 0, independent unconditional: 2491, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1495, independent: 1491, independent conditional: 0, independent unconditional: 1491, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2501, independent: 1000, independent conditional: 0, independent unconditional: 1000, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 1495, unknown conditional: 0, unknown unconditional: 1495] , Statistics on independence cache: Total cache size (in pairs): 35, Positive cache size: 33, Positive conditional cache size: 0, Positive unconditional cache size: 33, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...