/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/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 08:01:35,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:01:35,914 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 08:01:35,919 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:01:35,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:01:35,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:01:35,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:01:35,950 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:01:35,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:01:35,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:01:35,952 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:01:35,952 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:01:35,952 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:01:35,953 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:01:35,953 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:01:35,953 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:01:35,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:01:35,954 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:01:35,954 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:01:35,954 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:01:35,955 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:01:35,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:01:35,957 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:01:35,957 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:01:35,958 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:01:35,958 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:01:35,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:01:35,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:01:35,959 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:01:35,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:01:35,960 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:01:35,960 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:01:35,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:01:35,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:01:35,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:01:35,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:01:36,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:01:36,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:01:36,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:01:36,271 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:01:36,271 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:01:36,272 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-24 08:01:37,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:01:37,629 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:01:37,630 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-24 08:01:37,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7fea37ee/39cb8affb9ad48538234f2cbbc4a7a22/FLAG11a22dc25 [2023-08-24 08:01:37,651 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7fea37ee/39cb8affb9ad48538234f2cbbc4a7a22 [2023-08-24 08:01:37,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:01:37,658 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:01:37,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:01:37,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:01:37,661 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:01:37,662 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,663 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c14fb8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37, skipping insertion in model container [2023-08-24 08:01:37,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,683 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:01:37,842 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/mult-comm.wvr.c[1910,1923] [2023-08-24 08:01:37,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:01:37,851 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:01:37,873 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/mult-comm.wvr.c[1910,1923] [2023-08-24 08:01:37,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:01:37,891 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:01:37,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37 WrapperNode [2023-08-24 08:01:37,891 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:01:37,892 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:01:37,892 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:01:37,893 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:01:37,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,923 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-08-24 08:01:37,924 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:01:37,925 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:01:37,925 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:01:37,925 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:01:37,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,941 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,950 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,953 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:01:37,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:01:37,956 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:01:37,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:01:37,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (1/1) ... [2023-08-24 08:01:37,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:01:37,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:37,994 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 08:01:38,014 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 08:01:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:01:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:01:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:01:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:01:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:01:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:01:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:01:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:01:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:01:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:01:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:01:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:01:38,031 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 08:01:38,133 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:01:38,135 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:01:38,302 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:01:38,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:01:38,308 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 08:01:38,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:01:38 BoogieIcfgContainer [2023-08-24 08:01:38,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:01:38,312 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:01:38,312 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:01:38,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:01:38,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:01:37" (1/3) ... [2023-08-24 08:01:38,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136110c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:01:38, skipping insertion in model container [2023-08-24 08:01:38,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:01:37" (2/3) ... [2023-08-24 08:01:38,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136110c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:01:38, skipping insertion in model container [2023-08-24 08:01:38,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:01:38" (3/3) ... [2023-08-24 08:01:38,317 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-08-24 08:01:38,330 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:01:38,330 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:01:38,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:01:38,376 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 08:01:38,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 79 transitions, 174 flow [2023-08-24 08:01:38,439 INFO L124 PetriNetUnfolderBase]: 5/77 cut-off events. [2023-08-24 08:01:38,439 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:01:38,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-08-24 08:01:38,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 79 transitions, 174 flow [2023-08-24 08:01:38,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2023-08-24 08:01:38,455 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:01:38,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 69 transitions, 150 flow [2023-08-24 08:01:38,464 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 69 transitions, 150 flow [2023-08-24 08:01:38,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 150 flow [2023-08-24 08:01:38,485 INFO L124 PetriNetUnfolderBase]: 5/69 cut-off events. [2023-08-24 08:01:38,486 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:01:38,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 5/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-08-24 08:01:38,487 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 08:01:40,201 INFO L134 LiptonReduction]: Checked pairs total: 527 [2023-08-24 08:01:40,201 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-24 08:01:40,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:01:40,227 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;@70cf4920, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:01:40,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 08:01:40,241 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:01:40,242 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 08:01:40,242 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:01:40,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:40,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:40,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:40,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2039849832, now seen corresponding path program 1 times [2023-08-24 08:01:40,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:40,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266812896] [2023-08-24 08:01:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:40,766 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 08:01:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:40,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266812896] [2023-08-24 08:01:40,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266812896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:01:40,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:01:40,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 08:01:40,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114050176] [2023-08-24 08:01:40,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:01:40,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 08:01:40,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:40,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 08:01:40,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 08:01:40,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 140 [2023-08-24 08:01:40,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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 08:01:40,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:40,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 140 [2023-08-24 08:01:40,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:40,896 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-08-24 08:01:40,896 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 08:01:40,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 323 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-24 08:01:40,901 INFO L140 encePairwiseOnDemand]: 136/140 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-08-24 08:01:40,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-08-24 08:01:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:01:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:01:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-24 08:01:40,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2023-08-24 08:01:40,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-24 08:01:40,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-24 08:01:40,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:40,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-24 08:01:40,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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 08:01:40,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 08:01:40,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 08:01:40,935 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 222 transitions. [2023-08-24 08:01:40,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-08-24 08:01:40,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 08:01:40,940 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-08-24 08:01:40,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-24 08:01:40,945 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 08:01:40,945 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-08-24 08:01:40,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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 08:01:40,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:40,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:40,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:01:40,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:40,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1116452968, now seen corresponding path program 1 times [2023-08-24 08:01:40,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:40,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689803772] [2023-08-24 08:01:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:41,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:41,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689803772] [2023-08-24 08:01:41,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689803772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:41,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968815829] [2023-08-24 08:01:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:41,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:41,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:41,317 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 08:01:41,324 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 08:01:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:41,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 08:01:41,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:41,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:41,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968815829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:41,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:41,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-24 08:01:41,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421148944] [2023-08-24 08:01:41,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:41,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 08:01:41,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:41,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 08:01:41,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-24 08:01:41,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 140 [2023-08-24 08:01:41,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 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 08:01:41,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:41,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 140 [2023-08-24 08:01:41,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:41,966 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-08-24 08:01:41,967 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-24 08:01:41,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 137 events. 75/137 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 439 event pairs, 1 based on Foata normal form. 1/138 useless extension candidates. Maximal degree in co-relation 84. Up to 79 conditions per place. [2023-08-24 08:01:41,968 INFO L140 encePairwiseOnDemand]: 134/140 looper letters, 21 selfloop transitions, 5 changer transitions 15/42 dead transitions. [2023-08-24 08:01:41,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 42 transitions, 200 flow [2023-08-24 08:01:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:01:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:01:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2023-08-24 08:01:41,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-08-24 08:01:41,973 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 390 transitions. [2023-08-24 08:01:41,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 390 transitions. [2023-08-24 08:01:41,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:41,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 390 transitions. [2023-08-24 08:01:41,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 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 08:01:41,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 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 08:01:41,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 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 08:01:41,981 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 390 transitions. [2023-08-24 08:01:41,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 42 transitions, 200 flow [2023-08-24 08:01:41,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 08:01:41,986 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2023-08-24 08:01:41,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2023-08-24 08:01:41,987 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2023-08-24 08:01:41,987 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2023-08-24 08:01:41,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 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 08:01:41,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:41,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:42,002 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 08:01:42,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:42,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:42,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2093719365, now seen corresponding path program 1 times [2023-08-24 08:01:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:42,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162298060] [2023-08-24 08:01:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:42,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:42,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162298060] [2023-08-24 08:01:42,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162298060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:42,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417377861] [2023-08-24 08:01:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:42,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:42,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:42,364 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 08:01:42,366 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 08:01:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:42,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:01:42,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:42,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:42,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417377861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:42,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:42,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-24 08:01:42,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192126929] [2023-08-24 08:01:42,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:42,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 08:01:42,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:42,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 08:01:42,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-24 08:01:42,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 140 [2023-08-24 08:01:42,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 9 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 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 08:01:42,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:42,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 140 [2023-08-24 08:01:42,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:42,782 INFO L124 PetriNetUnfolderBase]: 48/93 cut-off events. [2023-08-24 08:01:42,783 INFO L125 PetriNetUnfolderBase]: For 39/45 co-relation queries the response was YES. [2023-08-24 08:01:42,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 93 events. 48/93 cut-off events. For 39/45 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 207 event pairs, 8 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 255. Up to 69 conditions per place. [2023-08-24 08:01:42,786 INFO L140 encePairwiseOnDemand]: 134/140 looper letters, 17 selfloop transitions, 6 changer transitions 9/34 dead transitions. [2023-08-24 08:01:42,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 189 flow [2023-08-24 08:01:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:01:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:01:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 380 transitions. [2023-08-24 08:01:42,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2023-08-24 08:01:42,789 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 380 transitions. [2023-08-24 08:01:42,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 380 transitions. [2023-08-24 08:01:42,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:42,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 380 transitions. [2023-08-24 08:01:42,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.333333333333336) internal successors, (380), 6 states have internal predecessors, (380), 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 08:01:42,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 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 08:01:42,792 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 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 08:01:42,792 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 6 states and 380 transitions. [2023-08-24 08:01:42,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 189 flow [2023-08-24 08:01:42,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 167 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-24 08:01:42,796 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 94 flow [2023-08-24 08:01:42,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-08-24 08:01:42,797 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-08-24 08:01:42,798 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 94 flow [2023-08-24 08:01:42,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 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 08:01:42,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:42,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:42,807 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 08:01:43,004 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,SelfDestructingSolverStorable2 [2023-08-24 08:01:43,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:43,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1917641603, now seen corresponding path program 2 times [2023-08-24 08:01:43,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:43,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76853094] [2023-08-24 08:01:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:43,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:43,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:43,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76853094] [2023-08-24 08:01:43,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76853094] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:43,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947148589] [2023-08-24 08:01:43,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:01:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:43,203 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 08:01:43,205 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 08:01:43,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:01:43,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:43,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 08:01:43,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:43,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:43,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947148589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:43,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:43,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 12 [2023-08-24 08:01:43,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412487261] [2023-08-24 08:01:43,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:43,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:01:43,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:01:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:01:43,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:01:43,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 94 flow. Second operand has 14 states, 14 states have (on average 52.57142857142857) internal successors, (736), 14 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 08:01:43,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:43,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:01:43,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:43,812 INFO L124 PetriNetUnfolderBase]: 113/211 cut-off events. [2023-08-24 08:01:43,812 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-08-24 08:01:43,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 211 events. 113/211 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 678 event pairs, 9 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 601. Up to 92 conditions per place. [2023-08-24 08:01:43,814 INFO L140 encePairwiseOnDemand]: 133/140 looper letters, 41 selfloop transitions, 19 changer transitions 12/72 dead transitions. [2023-08-24 08:01:43,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 72 transitions, 397 flow [2023-08-24 08:01:43,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:01:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:01:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 624 transitions. [2023-08-24 08:01:43,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051948051948052 [2023-08-24 08:01:43,817 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 624 transitions. [2023-08-24 08:01:43,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 624 transitions. [2023-08-24 08:01:43,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:43,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 624 transitions. [2023-08-24 08:01:43,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.72727272727273) internal successors, (624), 11 states have internal predecessors, (624), 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 08:01:43,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 140.0) internal successors, (1680), 12 states have internal predecessors, (1680), 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 08:01:43,823 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 140.0) internal successors, (1680), 12 states have internal predecessors, (1680), 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 08:01:43,823 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 94 flow. Second operand 11 states and 624 transitions. [2023-08-24 08:01:43,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 72 transitions, 397 flow [2023-08-24 08:01:43,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 72 transitions, 384 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-24 08:01:43,827 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 198 flow [2023-08-24 08:01:43,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=198, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-24 08:01:43,829 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2023-08-24 08:01:43,829 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 198 flow [2023-08-24 08:01:43,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.57142857142857) internal successors, (736), 14 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 08:01:43,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:43,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:43,838 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 08:01:44,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:44,036 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:44,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:44,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1021104531, now seen corresponding path program 3 times [2023-08-24 08:01:44,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:44,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273248615] [2023-08-24 08:01:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:44,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:44,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:44,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273248615] [2023-08-24 08:01:44,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273248615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:44,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777285630] [2023-08-24 08:01:44,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:01:44,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:44,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:44,277 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 08:01:44,301 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 08:01:44,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:01:44,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:44,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 08:01:44,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:44,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:44,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777285630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:44,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:44,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 11 [2023-08-24 08:01:44,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927504273] [2023-08-24 08:01:44,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:44,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:01:44,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:44,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:01:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:01:44,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:01:44,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 198 flow. Second operand has 13 states, 13 states have (on average 52.46153846153846) internal successors, (682), 13 states have internal predecessors, (682), 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 08:01:44,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:44,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:01:44,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:44,801 INFO L124 PetriNetUnfolderBase]: 132/244 cut-off events. [2023-08-24 08:01:44,801 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2023-08-24 08:01:44,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 244 events. 132/244 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 815 event pairs, 23 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 828. Up to 180 conditions per place. [2023-08-24 08:01:44,803 INFO L140 encePairwiseOnDemand]: 133/140 looper letters, 41 selfloop transitions, 17 changer transitions 8/66 dead transitions. [2023-08-24 08:01:44,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 459 flow [2023-08-24 08:01:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:01:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:01:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 506 transitions. [2023-08-24 08:01:44,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015873015873016 [2023-08-24 08:01:44,806 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 506 transitions. [2023-08-24 08:01:44,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 506 transitions. [2023-08-24 08:01:44,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:44,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 506 transitions. [2023-08-24 08:01:44,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 56.22222222222222) internal successors, (506), 9 states have internal predecessors, (506), 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 08:01:44,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 140.0) internal successors, (1400), 10 states have internal predecessors, (1400), 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 08:01:44,811 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 140.0) internal successors, (1400), 10 states have internal predecessors, (1400), 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 08:01:44,811 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 198 flow. Second operand 9 states and 506 transitions. [2023-08-24 08:01:44,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 459 flow [2023-08-24 08:01:44,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 66 transitions, 393 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-24 08:01:44,818 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 261 flow [2023-08-24 08:01:44,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-24 08:01:44,820 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2023-08-24 08:01:44,820 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 261 flow [2023-08-24 08:01:44,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.46153846153846) internal successors, (682), 13 states have internal predecessors, (682), 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 08:01:44,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:44,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:44,829 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 08:01:45,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:45,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:45,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:45,027 INFO L85 PathProgramCache]: Analyzing trace with hash -878847764, now seen corresponding path program 2 times [2023-08-24 08:01:45,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:45,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004600000] [2023-08-24 08:01:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:45,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:45,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:45,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004600000] [2023-08-24 08:01:45,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004600000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:45,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713450257] [2023-08-24 08:01:45,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:01:45,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:45,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:45,190 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 08:01:45,198 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 08:01:45,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:01:45,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:45,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:01:45,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:45,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:45,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713450257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:45,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:45,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-24 08:01:45,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261186238] [2023-08-24 08:01:45,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:45,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 08:01:45,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:45,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 08:01:45,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-24 08:01:45,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 140 [2023-08-24 08:01:45,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 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 08:01:45,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:45,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 140 [2023-08-24 08:01:45,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:45,585 INFO L124 PetriNetUnfolderBase]: 150/279 cut-off events. [2023-08-24 08:01:45,585 INFO L125 PetriNetUnfolderBase]: For 565/575 co-relation queries the response was YES. [2023-08-24 08:01:45,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 279 events. 150/279 cut-off events. For 565/575 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1065 event pairs, 22 based on Foata normal form. 8/273 useless extension candidates. Maximal degree in co-relation 961. Up to 214 conditions per place. [2023-08-24 08:01:45,588 INFO L140 encePairwiseOnDemand]: 134/140 looper letters, 47 selfloop transitions, 17 changer transitions 4/71 dead transitions. [2023-08-24 08:01:45,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 519 flow [2023-08-24 08:01:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:01:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:01:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 512 transitions. [2023-08-24 08:01:45,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-08-24 08:01:45,590 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 512 transitions. [2023-08-24 08:01:45,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 512 transitions. [2023-08-24 08:01:45,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:45,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 512 transitions. [2023-08-24 08:01:45,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 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 08:01:45,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 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 08:01:45,593 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 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 08:01:45,593 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 261 flow. Second operand 8 states and 512 transitions. [2023-08-24 08:01:45,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 519 flow [2023-08-24 08:01:45,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 472 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-24 08:01:45,597 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 314 flow [2023-08-24 08:01:45,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-24 08:01:45,598 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-24 08:01:45,598 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 314 flow [2023-08-24 08:01:45,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 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 08:01:45,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:45,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:45,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:45,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:45,806 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:45,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:45,806 INFO L85 PathProgramCache]: Analyzing trace with hash 483342802, now seen corresponding path program 3 times [2023-08-24 08:01:45,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:45,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653774703] [2023-08-24 08:01:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:46,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:46,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653774703] [2023-08-24 08:01:46,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653774703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:46,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803720540] [2023-08-24 08:01:46,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:01:46,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:46,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:46,018 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 08:01:46,041 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 08:01:46,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:01:46,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:46,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:01:46,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:46,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:46,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803720540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:46,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:46,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-08-24 08:01:46,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476977722] [2023-08-24 08:01:46,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:46,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:01:46,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:01:46,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:01:46,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 140 [2023-08-24 08:01:46,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 314 flow. Second operand has 11 states, 11 states have (on average 60.72727272727273) internal successors, (668), 11 states have internal predecessors, (668), 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 08:01:46,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:46,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 140 [2023-08-24 08:01:46,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:46,443 INFO L124 PetriNetUnfolderBase]: 194/361 cut-off events. [2023-08-24 08:01:46,443 INFO L125 PetriNetUnfolderBase]: For 719/729 co-relation queries the response was YES. [2023-08-24 08:01:46,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1342 conditions, 361 events. 194/361 cut-off events. For 719/729 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1474 event pairs, 36 based on Foata normal form. 9/355 useless extension candidates. Maximal degree in co-relation 1282. Up to 248 conditions per place. [2023-08-24 08:01:46,446 INFO L140 encePairwiseOnDemand]: 134/140 looper letters, 57 selfloop transitions, 22 changer transitions 7/89 dead transitions. [2023-08-24 08:01:46,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 89 transitions, 665 flow [2023-08-24 08:01:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:01:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:01:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 640 transitions. [2023-08-24 08:01:46,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-08-24 08:01:46,449 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 640 transitions. [2023-08-24 08:01:46,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 640 transitions. [2023-08-24 08:01:46,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:46,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 640 transitions. [2023-08-24 08:01:46,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 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 08:01:46,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 140.0) internal successors, (1540), 11 states have internal predecessors, (1540), 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 08:01:46,453 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 140.0) internal successors, (1540), 11 states have internal predecessors, (1540), 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 08:01:46,453 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 314 flow. Second operand 10 states and 640 transitions. [2023-08-24 08:01:46,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 89 transitions, 665 flow [2023-08-24 08:01:46,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 613 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-24 08:01:46,458 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 404 flow [2023-08-24 08:01:46,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=404, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-08-24 08:01:46,459 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-08-24 08:01:46,459 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 404 flow [2023-08-24 08:01:46,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 60.72727272727273) internal successors, (668), 11 states have internal predecessors, (668), 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 08:01:46,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:46,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:46,469 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 08:01:46,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:46,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:46,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:46,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1148246199, now seen corresponding path program 1 times [2023-08-24 08:01:46,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:46,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227686618] [2023-08-24 08:01:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:46,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:47,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227686618] [2023-08-24 08:01:47,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227686618] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417598552] [2023-08-24 08:01:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:47,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:47,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:47,141 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 08:01:47,144 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 08:01:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:47,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:01:47,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:47,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:49,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417598552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:49,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:49,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-24 08:01:49,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109236341] [2023-08-24 08:01:49,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:49,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:01:49,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:49,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:01:49,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:01:49,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:01:49,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 404 flow. Second operand has 19 states, 19 states have (on average 51.8421052631579) internal successors, (985), 19 states have internal predecessors, (985), 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 08:01:49,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:49,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:01:49,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:51,443 INFO L124 PetriNetUnfolderBase]: 328/656 cut-off events. [2023-08-24 08:01:51,443 INFO L125 PetriNetUnfolderBase]: For 1492/1492 co-relation queries the response was YES. [2023-08-24 08:01:51,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2474 conditions, 656 events. 328/656 cut-off events. For 1492/1492 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3405 event pairs, 35 based on Foata normal form. 3/655 useless extension candidates. Maximal degree in co-relation 2336. Up to 249 conditions per place. [2023-08-24 08:01:51,448 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 104 selfloop transitions, 72 changer transitions 31/207 dead transitions. [2023-08-24 08:01:51,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 207 transitions, 1562 flow [2023-08-24 08:01:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 08:01:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 08:01:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1673 transitions. [2023-08-24 08:01:51,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983333333333333 [2023-08-24 08:01:51,453 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1673 transitions. [2023-08-24 08:01:51,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1673 transitions. [2023-08-24 08:01:51,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:51,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1673 transitions. [2023-08-24 08:01:51,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.766666666666666) internal successors, (1673), 30 states have internal predecessors, (1673), 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 08:01:51,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 140.0) internal successors, (4340), 31 states have internal predecessors, (4340), 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 08:01:51,465 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 140.0) internal successors, (4340), 31 states have internal predecessors, (4340), 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 08:01:51,465 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 404 flow. Second operand 30 states and 1673 transitions. [2023-08-24 08:01:51,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 207 transitions, 1562 flow [2023-08-24 08:01:51,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 207 transitions, 1496 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-08-24 08:01:51,477 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 869 flow [2023-08-24 08:01:51,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=869, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2023-08-24 08:01:51,479 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-24 08:01:51,479 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 869 flow [2023-08-24 08:01:51,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.8421052631579) internal successors, (985), 19 states have internal predecessors, (985), 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 08:01:51,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:51,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:51,488 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 08:01:51,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:51,686 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:51,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:51,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1235818685, now seen corresponding path program 2 times [2023-08-24 08:01:51,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:51,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946379449] [2023-08-24 08:01:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:51,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946379449] [2023-08-24 08:01:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946379449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271886867] [2023-08-24 08:01:52,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:01:52,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:52,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:52,033 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 08:01:52,077 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 08:01:52,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:01:52,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:52,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:01:52,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:52,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:53,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271886867] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:53,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:53,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:01:53,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152410922] [2023-08-24 08:01:53,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:53,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:01:53,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:53,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:01:53,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:01:53,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:01:53,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 869 flow. Second operand has 18 states, 18 states have (on average 51.94444444444444) internal successors, (935), 18 states have internal predecessors, (935), 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 08:01:53,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:53,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:01:53,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:55,303 INFO L124 PetriNetUnfolderBase]: 338/668 cut-off events. [2023-08-24 08:01:55,303 INFO L125 PetriNetUnfolderBase]: For 2121/2121 co-relation queries the response was YES. [2023-08-24 08:01:55,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2903 conditions, 668 events. 338/668 cut-off events. For 2121/2121 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3409 event pairs, 27 based on Foata normal form. 4/668 useless extension candidates. Maximal degree in co-relation 2760. Up to 396 conditions per place. [2023-08-24 08:01:55,308 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 119 selfloop transitions, 55 changer transitions 23/197 dead transitions. [2023-08-24 08:01:55,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 197 transitions, 1671 flow [2023-08-24 08:01:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:01:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:01:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1280 transitions. [2023-08-24 08:01:55,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39751552795031053 [2023-08-24 08:01:55,313 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1280 transitions. [2023-08-24 08:01:55,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1280 transitions. [2023-08-24 08:01:55,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:55,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1280 transitions. [2023-08-24 08:01:55,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.65217391304348) internal successors, (1280), 23 states have internal predecessors, (1280), 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 08:01:55,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 140.0) internal successors, (3360), 24 states have internal predecessors, (3360), 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 08:01:55,322 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 140.0) internal successors, (3360), 24 states have internal predecessors, (3360), 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 08:01:55,322 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 869 flow. Second operand 23 states and 1280 transitions. [2023-08-24 08:01:55,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 197 transitions, 1671 flow [2023-08-24 08:01:55,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 197 transitions, 1308 flow, removed 160 selfloop flow, removed 13 redundant places. [2023-08-24 08:01:55,338 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 814 flow [2023-08-24 08:01:55,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=814, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2023-08-24 08:01:55,339 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 86 predicate places. [2023-08-24 08:01:55,339 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 814 flow [2023-08-24 08:01:55,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.94444444444444) internal successors, (935), 18 states have internal predecessors, (935), 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 08:01:55,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:55,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:55,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:55,546 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,SelfDestructingSolverStorable8 [2023-08-24 08:01:55,546 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:55,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:55,546 INFO L85 PathProgramCache]: Analyzing trace with hash -468396975, now seen corresponding path program 3 times [2023-08-24 08:01:55,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:55,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752162173] [2023-08-24 08:01:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:55,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:56,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:56,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752162173] [2023-08-24 08:01:56,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752162173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:56,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117659826] [2023-08-24 08:01:56,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:01:56,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:56,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:56,013 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 08:01:56,016 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 08:01:56,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:01:56,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:56,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:01:56,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:56,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:57,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117659826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:57,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:57,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-24 08:01:57,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011346332] [2023-08-24 08:01:57,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:57,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:01:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:01:57,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:01:57,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:01:57,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 814 flow. Second operand has 19 states, 19 states have (on average 51.8421052631579) internal successors, (985), 19 states have internal predecessors, (985), 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 08:01:57,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:57,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:01:57,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:00,481 INFO L124 PetriNetUnfolderBase]: 322/633 cut-off events. [2023-08-24 08:02:00,482 INFO L125 PetriNetUnfolderBase]: For 1364/1364 co-relation queries the response was YES. [2023-08-24 08:02:00,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 633 events. 322/633 cut-off events. For 1364/1364 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3203 event pairs, 27 based on Foata normal form. 3/614 useless extension candidates. Maximal degree in co-relation 2436. Up to 289 conditions per place. [2023-08-24 08:02:00,486 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 92 selfloop transitions, 82 changer transitions 17/191 dead transitions. [2023-08-24 08:02:00,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 191 transitions, 1455 flow [2023-08-24 08:02:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:02:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:02:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1389 transitions. [2023-08-24 08:02:00,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39685714285714285 [2023-08-24 08:02:00,492 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1389 transitions. [2023-08-24 08:02:00,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1389 transitions. [2023-08-24 08:02:00,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:00,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1389 transitions. [2023-08-24 08:02:00,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.56) internal successors, (1389), 25 states have internal predecessors, (1389), 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 08:02:00,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 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 08:02:00,502 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 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 08:02:00,502 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 814 flow. Second operand 25 states and 1389 transitions. [2023-08-24 08:02:00,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 191 transitions, 1455 flow [2023-08-24 08:02:00,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 191 transitions, 1335 flow, removed 34 selfloop flow, removed 13 redundant places. [2023-08-24 08:02:00,512 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 954 flow [2023-08-24 08:02:00,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=954, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2023-08-24 08:02:00,513 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 99 predicate places. [2023-08-24 08:02:00,513 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 954 flow [2023-08-24 08:02:00,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.8421052631579) internal successors, (985), 19 states have internal predecessors, (985), 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 08:02:00,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:00,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:00,519 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 08:02:00,719 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,SelfDestructingSolverStorable9 [2023-08-24 08:02:00,720 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:00,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash -523239864, now seen corresponding path program 4 times [2023-08-24 08:02:00,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:00,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540743445] [2023-08-24 08:02:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:00,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:01,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:01,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540743445] [2023-08-24 08:02:01,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540743445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:01,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289974084] [2023-08-24 08:02:01,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:02:01,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:01,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:01,236 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 08:02:01,237 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 08:02:01,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:02:01,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:01,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 08:02:01,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:01,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:03,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289974084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:03,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:03,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-24 08:02:03,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677087116] [2023-08-24 08:02:03,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:03,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:02:03,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:02:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-08-24 08:02:03,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:02:03,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 954 flow. Second operand has 21 states, 21 states have (on average 51.857142857142854) internal successors, (1089), 21 states have internal predecessors, (1089), 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 08:02:03,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:03,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:02:03,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:07,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:10,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:13,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:15,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:17,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:22,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:25,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:27,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:28,097 INFO L124 PetriNetUnfolderBase]: 443/842 cut-off events. [2023-08-24 08:02:28,098 INFO L125 PetriNetUnfolderBase]: For 2427/2427 co-relation queries the response was YES. [2023-08-24 08:02:28,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 842 events. 443/842 cut-off events. For 2427/2427 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4385 event pairs, 29 based on Foata normal form. 4/828 useless extension candidates. Maximal degree in co-relation 3613. Up to 415 conditions per place. [2023-08-24 08:02:28,103 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 138 selfloop transitions, 88 changer transitions 26/252 dead transitions. [2023-08-24 08:02:28,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 252 transitions, 2148 flow [2023-08-24 08:02:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 08:02:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 08:02:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1775 transitions. [2023-08-24 08:02:28,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39620535714285715 [2023-08-24 08:02:28,110 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1775 transitions. [2023-08-24 08:02:28,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1775 transitions. [2023-08-24 08:02:28,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:28,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1775 transitions. [2023-08-24 08:02:28,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.46875) internal successors, (1775), 32 states have internal predecessors, (1775), 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 08:02:28,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 140.0) internal successors, (4620), 33 states have internal predecessors, (4620), 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 08:02:28,121 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 140.0) internal successors, (4620), 33 states have internal predecessors, (4620), 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 08:02:28,121 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 954 flow. Second operand 32 states and 1775 transitions. [2023-08-24 08:02:28,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 252 transitions, 2148 flow [2023-08-24 08:02:28,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 252 transitions, 1938 flow, removed 40 selfloop flow, removed 20 redundant places. [2023-08-24 08:02:28,136 INFO L231 Difference]: Finished difference. Result has 134 places, 157 transitions, 1321 flow [2023-08-24 08:02:28,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1321, PETRI_PLACES=134, PETRI_TRANSITIONS=157} [2023-08-24 08:02:28,137 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 114 predicate places. [2023-08-24 08:02:28,137 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 157 transitions, 1321 flow [2023-08-24 08:02:28,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 51.857142857142854) internal successors, (1089), 21 states have internal predecessors, (1089), 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 08:02:28,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:28,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:28,145 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 08:02:28,343 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,SelfDestructingSolverStorable10 [2023-08-24 08:02:28,344 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:28,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash 895275479, now seen corresponding path program 5 times [2023-08-24 08:02:28,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:28,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728038585] [2023-08-24 08:02:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:28,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:28,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:28,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728038585] [2023-08-24 08:02:28,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728038585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:28,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773754585] [2023-08-24 08:02:28,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:02:28,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:28,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:28,723 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 08:02:28,725 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 08:02:28,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:02:28,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:28,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:02:28,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:28,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773754585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:31,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:02:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037970077] [2023-08-24 08:02:31,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:02:31,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:02:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:02:31,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:02:31,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 157 transitions, 1321 flow. Second operand has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 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 08:02:31,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:31,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:02:31,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:32,120 INFO L124 PetriNetUnfolderBase]: 480/912 cut-off events. [2023-08-24 08:02:32,121 INFO L125 PetriNetUnfolderBase]: For 3473/3473 co-relation queries the response was YES. [2023-08-24 08:02:32,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4390 conditions, 912 events. 480/912 cut-off events. For 3473/3473 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4837 event pairs, 67 based on Foata normal form. 2/894 useless extension candidates. Maximal degree in co-relation 4347. Up to 777 conditions per place. [2023-08-24 08:02:32,127 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 172 selfloop transitions, 37 changer transitions 16/225 dead transitions. [2023-08-24 08:02:32,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 225 transitions, 2191 flow [2023-08-24 08:02:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:02:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:02:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2023-08-24 08:02:32,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982142857142857 [2023-08-24 08:02:32,129 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2023-08-24 08:02:32,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2023-08-24 08:02:32,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:32,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2023-08-24 08:02:32,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 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 08:02:32,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 140.0) internal successors, (2380), 17 states have internal predecessors, (2380), 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 08:02:32,135 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 140.0) internal successors, (2380), 17 states have internal predecessors, (2380), 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 08:02:32,135 INFO L175 Difference]: Start difference. First operand has 134 places, 157 transitions, 1321 flow. Second operand 16 states and 892 transitions. [2023-08-24 08:02:32,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 225 transitions, 2191 flow [2023-08-24 08:02:32,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 225 transitions, 1933 flow, removed 103 selfloop flow, removed 12 redundant places. [2023-08-24 08:02:32,157 INFO L231 Difference]: Finished difference. Result has 143 places, 179 transitions, 1472 flow [2023-08-24 08:02:32,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1472, PETRI_PLACES=143, PETRI_TRANSITIONS=179} [2023-08-24 08:02:32,158 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 123 predicate places. [2023-08-24 08:02:32,158 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 179 transitions, 1472 flow [2023-08-24 08:02:32,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 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 08:02:32,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:32,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:32,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:32,364 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,SelfDestructingSolverStorable11 [2023-08-24 08:02:32,365 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:32,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:32,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1057964283, now seen corresponding path program 6 times [2023-08-24 08:02:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:32,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684971686] [2023-08-24 08:02:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:32,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684971686] [2023-08-24 08:02:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684971686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001671729] [2023-08-24 08:02:32,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:02:32,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:32,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:32,761 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 08:02:32,768 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 08:02:32,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:02:32,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:32,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:02:32,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:32,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:35,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001671729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:35,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:35,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:02:35,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519033095] [2023-08-24 08:02:35,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:35,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:02:35,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:02:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:02:35,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:02:35,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 179 transitions, 1472 flow. Second operand has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:02:35,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:35,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:02:35,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:37,206 INFO L124 PetriNetUnfolderBase]: 500/958 cut-off events. [2023-08-24 08:02:37,207 INFO L125 PetriNetUnfolderBase]: For 4131/4131 co-relation queries the response was YES. [2023-08-24 08:02:37,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 958 events. 500/958 cut-off events. For 4131/4131 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5229 event pairs, 71 based on Foata normal form. 2/938 useless extension candidates. Maximal degree in co-relation 4603. Up to 786 conditions per place. [2023-08-24 08:02:37,212 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 167 selfloop transitions, 50 changer transitions 13/230 dead transitions. [2023-08-24 08:02:37,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 230 transitions, 2251 flow [2023-08-24 08:02:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 08:02:37,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 08:02:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 989 transitions. [2023-08-24 08:02:37,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39246031746031745 [2023-08-24 08:02:37,214 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 989 transitions. [2023-08-24 08:02:37,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 989 transitions. [2023-08-24 08:02:37,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:37,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 989 transitions. [2023-08-24 08:02:37,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 54.94444444444444) internal successors, (989), 18 states have internal predecessors, (989), 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 08:02:37,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 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 08:02:37,219 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 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 08:02:37,219 INFO L175 Difference]: Start difference. First operand has 143 places, 179 transitions, 1472 flow. Second operand 18 states and 989 transitions. [2023-08-24 08:02:37,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 230 transitions, 2251 flow [2023-08-24 08:02:37,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 230 transitions, 2156 flow, removed 42 selfloop flow, removed 3 redundant places. [2023-08-24 08:02:37,241 INFO L231 Difference]: Finished difference. Result has 162 places, 189 transitions, 1701 flow [2023-08-24 08:02:37,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1701, PETRI_PLACES=162, PETRI_TRANSITIONS=189} [2023-08-24 08:02:37,242 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 142 predicate places. [2023-08-24 08:02:37,242 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 189 transitions, 1701 flow [2023-08-24 08:02:37,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:02:37,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:37,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:37,249 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 08:02:37,449 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,SelfDestructingSolverStorable12 [2023-08-24 08:02:37,449 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:37,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:37,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1605736052, now seen corresponding path program 4 times [2023-08-24 08:02:37,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:37,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196408341] [2023-08-24 08:02:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:37,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:37,657 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 08:02:37,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:37,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196408341] [2023-08-24 08:02:37,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196408341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:37,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995459204] [2023-08-24 08:02:37,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:02:37,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:37,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:37,661 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 08:02:37,685 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 08:02:37,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:02:37,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:37,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 08:02:37,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:37,880 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 08:02:37,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:38,020 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 08:02:38,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995459204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:38,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:38,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2023-08-24 08:02:38,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061099447] [2023-08-24 08:02:38,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:38,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:02:38,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:38,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:02:38,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:02:38,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 140 [2023-08-24 08:02:38,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 189 transitions, 1701 flow. Second operand has 16 states, 16 states have (on average 54.5) internal successors, (872), 16 states have internal predecessors, (872), 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 08:02:38,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:38,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 140 [2023-08-24 08:02:38,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:38,394 INFO L124 PetriNetUnfolderBase]: 505/964 cut-off events. [2023-08-24 08:02:38,394 INFO L125 PetriNetUnfolderBase]: For 4874/4874 co-relation queries the response was YES. [2023-08-24 08:02:38,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4894 conditions, 964 events. 505/964 cut-off events. For 4874/4874 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5222 event pairs, 70 based on Foata normal form. 5/951 useless extension candidates. Maximal degree in co-relation 4800. Up to 824 conditions per place. [2023-08-24 08:02:38,403 INFO L140 encePairwiseOnDemand]: 133/140 looper letters, 175 selfloop transitions, 28 changer transitions 34/237 dead transitions. [2023-08-24 08:02:38,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 237 transitions, 2410 flow [2023-08-24 08:02:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:02:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:02:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 754 transitions. [2023-08-24 08:02:38,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-08-24 08:02:38,405 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 754 transitions. [2023-08-24 08:02:38,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 754 transitions. [2023-08-24 08:02:38,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:38,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 754 transitions. [2023-08-24 08:02:38,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 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 08:02:38,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 140.0) internal successors, (1960), 14 states have internal predecessors, (1960), 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 08:02:38,409 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 140.0) internal successors, (1960), 14 states have internal predecessors, (1960), 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 08:02:38,409 INFO L175 Difference]: Start difference. First operand has 162 places, 189 transitions, 1701 flow. Second operand 13 states and 754 transitions. [2023-08-24 08:02:38,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 237 transitions, 2410 flow [2023-08-24 08:02:38,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 237 transitions, 2265 flow, removed 52 selfloop flow, removed 11 redundant places. [2023-08-24 08:02:38,441 INFO L231 Difference]: Finished difference. Result has 164 places, 185 transitions, 1580 flow [2023-08-24 08:02:38,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1580, PETRI_PLACES=164, PETRI_TRANSITIONS=185} [2023-08-24 08:02:38,442 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2023-08-24 08:02:38,442 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 185 transitions, 1580 flow [2023-08-24 08:02:38,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.5) internal successors, (872), 16 states have internal predecessors, (872), 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 08:02:38,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:38,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:38,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-24 08:02:38,651 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,SelfDestructingSolverStorable13 [2023-08-24 08:02:38,651 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:38,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash 671083051, now seen corresponding path program 7 times [2023-08-24 08:02:38,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:38,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127155051] [2023-08-24 08:02:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:38,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:39,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:39,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127155051] [2023-08-24 08:02:39,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127155051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:39,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855945765] [2023-08-24 08:02:39,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:02:39,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:39,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:39,081 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 08:02:39,081 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 08:02:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:39,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:02:39,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:39,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:43,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855945765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:43,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:43,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:02:43,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913114503] [2023-08-24 08:02:43,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:43,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:02:43,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:43,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:02:43,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:02:43,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:02:43,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 185 transitions, 1580 flow. Second operand has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:02:43,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:43,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:02:43,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:44,689 INFO L124 PetriNetUnfolderBase]: 541/1017 cut-off events. [2023-08-24 08:02:44,690 INFO L125 PetriNetUnfolderBase]: For 5220/5220 co-relation queries the response was YES. [2023-08-24 08:02:44,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5293 conditions, 1017 events. 541/1017 cut-off events. For 5220/5220 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5509 event pairs, 72 based on Foata normal form. 2/997 useless extension candidates. Maximal degree in co-relation 5245. Up to 875 conditions per place. [2023-08-24 08:02:44,699 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 194 selfloop transitions, 50 changer transitions 8/252 dead transitions. [2023-08-24 08:02:44,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 252 transitions, 2662 flow [2023-08-24 08:02:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:02:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:02:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1047 transitions. [2023-08-24 08:02:44,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39360902255639096 [2023-08-24 08:02:44,701 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1047 transitions. [2023-08-24 08:02:44,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1047 transitions. [2023-08-24 08:02:44,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:44,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1047 transitions. [2023-08-24 08:02:44,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.10526315789474) internal successors, (1047), 19 states have internal predecessors, (1047), 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 08:02:44,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 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 08:02:44,707 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 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 08:02:44,707 INFO L175 Difference]: Start difference. First operand has 164 places, 185 transitions, 1580 flow. Second operand 19 states and 1047 transitions. [2023-08-24 08:02:44,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 252 transitions, 2662 flow [2023-08-24 08:02:44,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 252 transitions, 2547 flow, removed 16 selfloop flow, removed 16 redundant places. [2023-08-24 08:02:44,737 INFO L231 Difference]: Finished difference. Result has 169 places, 210 transitions, 2014 flow [2023-08-24 08:02:44,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2014, PETRI_PLACES=169, PETRI_TRANSITIONS=210} [2023-08-24 08:02:44,738 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 149 predicate places. [2023-08-24 08:02:44,738 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 210 transitions, 2014 flow [2023-08-24 08:02:44,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:02:44,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:44,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:44,745 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 08:02:44,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:44,941 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:44,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1071226083, now seen corresponding path program 8 times [2023-08-24 08:02:44,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:44,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364433973] [2023-08-24 08:02:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:44,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:45,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:45,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364433973] [2023-08-24 08:02:45,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364433973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:45,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199565221] [2023-08-24 08:02:45,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:02:45,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:45,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:45,285 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:02:45,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 08:02:45,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:02:45,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:45,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:02:45,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:45,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:48,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199565221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:48,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:48,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:02:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557549788] [2023-08-24 08:02:48,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:48,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:02:48,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:02:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:02:48,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:02:48,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 210 transitions, 2014 flow. Second operand has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 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 08:02:48,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:48,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:02:48,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:50,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:02:51,401 INFO L124 PetriNetUnfolderBase]: 570/1070 cut-off events. [2023-08-24 08:02:51,402 INFO L125 PetriNetUnfolderBase]: For 6636/6636 co-relation queries the response was YES. [2023-08-24 08:02:51,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 1070 events. 570/1070 cut-off events. For 6636/6636 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5865 event pairs, 71 based on Foata normal form. 2/1050 useless extension candidates. Maximal degree in co-relation 5780. Up to 874 conditions per place. [2023-08-24 08:02:51,411 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 188 selfloop transitions, 63 changer transitions 11/262 dead transitions. [2023-08-24 08:02:51,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 262 transitions, 2861 flow [2023-08-24 08:02:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:02:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:02:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 942 transitions. [2023-08-24 08:02:51,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3957983193277311 [2023-08-24 08:02:51,413 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 942 transitions. [2023-08-24 08:02:51,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 942 transitions. [2023-08-24 08:02:51,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:51,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 942 transitions. [2023-08-24 08:02:51,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.411764705882355) internal successors, (942), 17 states have internal predecessors, (942), 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 08:02:51,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 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 08:02:51,418 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 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 08:02:51,418 INFO L175 Difference]: Start difference. First operand has 169 places, 210 transitions, 2014 flow. Second operand 17 states and 942 transitions. [2023-08-24 08:02:51,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 262 transitions, 2861 flow [2023-08-24 08:02:51,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 262 transitions, 2648 flow, removed 97 selfloop flow, removed 6 redundant places. [2023-08-24 08:02:51,460 INFO L231 Difference]: Finished difference. Result has 184 places, 220 transitions, 2174 flow [2023-08-24 08:02:51,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2174, PETRI_PLACES=184, PETRI_TRANSITIONS=220} [2023-08-24 08:02:51,461 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 164 predicate places. [2023-08-24 08:02:51,461 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 220 transitions, 2174 flow [2023-08-24 08:02:51,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 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 08:02:51,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:51,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:51,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:51,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 08:02:51,666 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:51,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash 672272343, now seen corresponding path program 9 times [2023-08-24 08:02:51,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:51,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771619153] [2023-08-24 08:02:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:51,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:51,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:51,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771619153] [2023-08-24 08:02:51,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771619153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:51,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362703533] [2023-08-24 08:02:51,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:02:51,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:51,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:51,973 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:02:51,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 08:02:52,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:02:52,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:52,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:02:52,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:52,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:54,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362703533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:54,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:54,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:02:54,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395849357] [2023-08-24 08:02:54,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:54,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:02:54,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:02:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:02:54,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:02:54,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 220 transitions, 2174 flow. Second operand has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:02:54,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:54,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:02:54,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:55,577 INFO L124 PetriNetUnfolderBase]: 565/1080 cut-off events. [2023-08-24 08:02:55,577 INFO L125 PetriNetUnfolderBase]: For 7118/7118 co-relation queries the response was YES. [2023-08-24 08:02:55,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6007 conditions, 1080 events. 565/1080 cut-off events. For 7118/7118 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6030 event pairs, 80 based on Foata normal form. 3/1059 useless extension candidates. Maximal degree in co-relation 5952. Up to 982 conditions per place. [2023-08-24 08:02:55,588 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 210 selfloop transitions, 40 changer transitions 7/257 dead transitions. [2023-08-24 08:02:55,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 257 transitions, 2899 flow [2023-08-24 08:02:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 08:02:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 08:02:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 982 transitions. [2023-08-24 08:02:55,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896825396825397 [2023-08-24 08:02:55,598 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 982 transitions. [2023-08-24 08:02:55,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 982 transitions. [2023-08-24 08:02:55,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:55,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 982 transitions. [2023-08-24 08:02:55,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 54.55555555555556) internal successors, (982), 18 states have internal predecessors, (982), 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 08:02:55,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 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 08:02:55,608 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 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 08:02:55,608 INFO L175 Difference]: Start difference. First operand has 184 places, 220 transitions, 2174 flow. Second operand 18 states and 982 transitions. [2023-08-24 08:02:55,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 257 transitions, 2899 flow [2023-08-24 08:02:55,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 257 transitions, 2709 flow, removed 67 selfloop flow, removed 13 redundant places. [2023-08-24 08:02:55,654 INFO L231 Difference]: Finished difference. Result has 193 places, 225 transitions, 2191 flow [2023-08-24 08:02:55,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2191, PETRI_PLACES=193, PETRI_TRANSITIONS=225} [2023-08-24 08:02:55,655 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 173 predicate places. [2023-08-24 08:02:55,655 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 225 transitions, 2191 flow [2023-08-24 08:02:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:02:55,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:55,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:55,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:55,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 08:02:55,861 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:55,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:55,861 INFO L85 PathProgramCache]: Analyzing trace with hash 657821251, now seen corresponding path program 10 times [2023-08-24 08:02:55,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:55,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373259592] [2023-08-24 08:02:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:55,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:56,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:56,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373259592] [2023-08-24 08:02:56,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373259592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:56,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628123512] [2023-08-24 08:02:56,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:02:56,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:56,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:56,228 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:02:56,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 08:02:56,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:02:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:56,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:02:56,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:56,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:59,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628123512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:59,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:59,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:02:59,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643487456] [2023-08-24 08:02:59,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:59,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:02:59,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:02:59,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:02:59,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:02:59,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 225 transitions, 2191 flow. Second operand has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 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 08:02:59,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:59,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:02:59,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:00,880 INFO L124 PetriNetUnfolderBase]: 568/1076 cut-off events. [2023-08-24 08:03:00,880 INFO L125 PetriNetUnfolderBase]: For 6855/6855 co-relation queries the response was YES. [2023-08-24 08:03:00,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5921 conditions, 1076 events. 568/1076 cut-off events. For 6855/6855 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5947 event pairs, 78 based on Foata normal form. 2/1054 useless extension candidates. Maximal degree in co-relation 5862. Up to 936 conditions per place. [2023-08-24 08:03:00,889 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 202 selfloop transitions, 55 changer transitions 10/267 dead transitions. [2023-08-24 08:03:00,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 267 transitions, 2926 flow [2023-08-24 08:03:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 08:03:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 08:03:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1093 transitions. [2023-08-24 08:03:00,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39035714285714285 [2023-08-24 08:03:00,891 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1093 transitions. [2023-08-24 08:03:00,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1093 transitions. [2023-08-24 08:03:00,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:00,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1093 transitions. [2023-08-24 08:03:00,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 54.65) internal successors, (1093), 20 states have internal predecessors, (1093), 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 08:03:00,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 140.0) internal successors, (2940), 21 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:00,895 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 140.0) internal successors, (2940), 21 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:00,895 INFO L175 Difference]: Start difference. First operand has 193 places, 225 transitions, 2191 flow. Second operand 20 states and 1093 transitions. [2023-08-24 08:03:00,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 267 transitions, 2926 flow [2023-08-24 08:03:00,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 267 transitions, 2812 flow, removed 34 selfloop flow, removed 12 redundant places. [2023-08-24 08:03:00,935 INFO L231 Difference]: Finished difference. Result has 204 places, 229 transitions, 2320 flow [2023-08-24 08:03:00,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2320, PETRI_PLACES=204, PETRI_TRANSITIONS=229} [2023-08-24 08:03:00,936 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2023-08-24 08:03:00,936 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 229 transitions, 2320 flow [2023-08-24 08:03:00,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 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 08:03:00,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:00,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:00,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:01,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 08:03:01,141 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:01,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1465999503, now seen corresponding path program 11 times [2023-08-24 08:03:01,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:01,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830656353] [2023-08-24 08:03:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:01,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:01,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:01,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830656353] [2023-08-24 08:03:01,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830656353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:01,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643499935] [2023-08-24 08:03:01,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:03:01,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:01,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:01,474 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:01,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 08:03:01,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:03:01,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:01,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:03:01,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:01,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:04,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643499935] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:04,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:04,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:03:04,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50008782] [2023-08-24 08:03:04,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:04,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:03:04,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:04,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:03:04,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:03:05,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:05,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 229 transitions, 2320 flow. Second operand has 18 states, 18 states have (on average 51.94444444444444) internal successors, (935), 18 states have internal predecessors, (935), 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 08:03:05,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:05,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:05,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:05,844 INFO L124 PetriNetUnfolderBase]: 591/1115 cut-off events. [2023-08-24 08:03:05,845 INFO L125 PetriNetUnfolderBase]: For 8459/8459 co-relation queries the response was YES. [2023-08-24 08:03:05,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6414 conditions, 1115 events. 591/1115 cut-off events. For 8459/8459 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6169 event pairs, 76 based on Foata normal form. 2/1097 useless extension candidates. Maximal degree in co-relation 6351. Up to 994 conditions per place. [2023-08-24 08:03:05,856 INFO L140 encePairwiseOnDemand]: 131/140 looper letters, 230 selfloop transitions, 41 changer transitions 11/282 dead transitions. [2023-08-24 08:03:05,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 282 transitions, 3256 flow [2023-08-24 08:03:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:03:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:03:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 939 transitions. [2023-08-24 08:03:05,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945378151260504 [2023-08-24 08:03:05,858 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 939 transitions. [2023-08-24 08:03:05,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 939 transitions. [2023-08-24 08:03:05,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:05,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 939 transitions. [2023-08-24 08:03:05,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.23529411764706) internal successors, (939), 17 states have internal predecessors, (939), 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 08:03:05,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 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 08:03:05,862 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 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 08:03:05,862 INFO L175 Difference]: Start difference. First operand has 204 places, 229 transitions, 2320 flow. Second operand 17 states and 939 transitions. [2023-08-24 08:03:05,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 282 transitions, 3256 flow [2023-08-24 08:03:05,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 282 transitions, 3094 flow, removed 36 selfloop flow, removed 15 redundant places. [2023-08-24 08:03:05,917 INFO L231 Difference]: Finished difference. Result has 209 places, 242 transitions, 2505 flow [2023-08-24 08:03:05,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2505, PETRI_PLACES=209, PETRI_TRANSITIONS=242} [2023-08-24 08:03:05,918 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-08-24 08:03:05,918 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 242 transitions, 2505 flow [2023-08-24 08:03:05,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.94444444444444) internal successors, (935), 18 states have internal predecessors, (935), 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 08:03:05,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:05,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:05,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:06,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:06,123 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:06,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash -829993603, now seen corresponding path program 12 times [2023-08-24 08:03:06,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:06,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537100251] [2023-08-24 08:03:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:06,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537100251] [2023-08-24 08:03:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537100251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544104433] [2023-08-24 08:03:06,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:03:06,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:06,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:06,427 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:06,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 08:03:06,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:03:06,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:06,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:03:06,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:06,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:07,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544104433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:07,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:07,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-24 08:03:07,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783027640] [2023-08-24 08:03:07,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:03:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:03:07,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:03:07,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:07,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 242 transitions, 2505 flow. Second operand has 19 states, 19 states have (on average 51.8421052631579) internal successors, (985), 19 states have internal predecessors, (985), 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 08:03:07,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:07,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:07,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:08,858 INFO L124 PetriNetUnfolderBase]: 646/1234 cut-off events. [2023-08-24 08:03:08,858 INFO L125 PetriNetUnfolderBase]: For 10067/10067 co-relation queries the response was YES. [2023-08-24 08:03:08,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7180 conditions, 1234 events. 646/1234 cut-off events. For 10067/10067 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7138 event pairs, 62 based on Foata normal form. 3/1217 useless extension candidates. Maximal degree in co-relation 7114. Up to 980 conditions per place. [2023-08-24 08:03:08,870 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 233 selfloop transitions, 77 changer transitions 21/331 dead transitions. [2023-08-24 08:03:08,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 331 transitions, 3978 flow [2023-08-24 08:03:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:03:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:03:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1323 transitions. [2023-08-24 08:03:08,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2023-08-24 08:03:08,873 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1323 transitions. [2023-08-24 08:03:08,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1323 transitions. [2023-08-24 08:03:08,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:08,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1323 transitions. [2023-08-24 08:03:08,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.125) internal successors, (1323), 24 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:08,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 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 08:03:08,878 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 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 08:03:08,878 INFO L175 Difference]: Start difference. First operand has 209 places, 242 transitions, 2505 flow. Second operand 24 states and 1323 transitions. [2023-08-24 08:03:08,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 331 transitions, 3978 flow [2023-08-24 08:03:08,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 331 transitions, 3806 flow, removed 62 selfloop flow, removed 12 redundant places. [2023-08-24 08:03:08,935 INFO L231 Difference]: Finished difference. Result has 223 places, 273 transitions, 3038 flow [2023-08-24 08:03:08,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3038, PETRI_PLACES=223, PETRI_TRANSITIONS=273} [2023-08-24 08:03:08,936 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 203 predicate places. [2023-08-24 08:03:08,936 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 273 transitions, 3038 flow [2023-08-24 08:03:08,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.8421052631579) internal successors, (985), 19 states have internal predecessors, (985), 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 08:03:08,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:08,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:08,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:09,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:09,142 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:09,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash -232763313, now seen corresponding path program 13 times [2023-08-24 08:03:09,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:09,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104402092] [2023-08-24 08:03:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:09,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:09,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:09,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104402092] [2023-08-24 08:03:09,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104402092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:09,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423336877] [2023-08-24 08:03:09,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:03:09,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:09,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:09,450 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:09,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 08:03:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:09,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:03:09,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:09,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:10,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423336877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:10,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:10,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-24 08:03:10,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006428123] [2023-08-24 08:03:10,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:10,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:03:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:03:10,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:03:10,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:10,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 273 transitions, 3038 flow. Second operand has 19 states, 19 states have (on average 51.8421052631579) internal successors, (985), 19 states have internal predecessors, (985), 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 08:03:10,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:10,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:10,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:12,026 INFO L124 PetriNetUnfolderBase]: 633/1207 cut-off events. [2023-08-24 08:03:12,026 INFO L125 PetriNetUnfolderBase]: For 9645/9645 co-relation queries the response was YES. [2023-08-24 08:03:12,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7174 conditions, 1207 events. 633/1207 cut-off events. For 9645/9645 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6903 event pairs, 60 based on Foata normal form. 3/1190 useless extension candidates. Maximal degree in co-relation 7109. Up to 993 conditions per place. [2023-08-24 08:03:12,035 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 241 selfloop transitions, 74 changer transitions 19/334 dead transitions. [2023-08-24 08:03:12,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 334 transitions, 4047 flow [2023-08-24 08:03:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:03:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:03:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1367 transitions. [2023-08-24 08:03:12,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39057142857142857 [2023-08-24 08:03:12,037 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1367 transitions. [2023-08-24 08:03:12,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1367 transitions. [2023-08-24 08:03:12,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:12,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1367 transitions. [2023-08-24 08:03:12,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 54.68) internal successors, (1367), 25 states have internal predecessors, (1367), 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 08:03:12,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 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 08:03:12,041 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 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 08:03:12,041 INFO L175 Difference]: Start difference. First operand has 223 places, 273 transitions, 3038 flow. Second operand 25 states and 1367 transitions. [2023-08-24 08:03:12,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 334 transitions, 4047 flow [2023-08-24 08:03:12,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 334 transitions, 3631 flow, removed 194 selfloop flow, removed 11 redundant places. [2023-08-24 08:03:12,080 INFO L231 Difference]: Finished difference. Result has 242 places, 278 transitions, 2911 flow [2023-08-24 08:03:12,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2632, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2911, PETRI_PLACES=242, PETRI_TRANSITIONS=278} [2023-08-24 08:03:12,080 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-08-24 08:03:12,080 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 278 transitions, 2911 flow [2023-08-24 08:03:12,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.8421052631579) internal successors, (985), 19 states have internal predecessors, (985), 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 08:03:12,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:12,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:12,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:12,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-24 08:03:12,281 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:12,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:12,282 INFO L85 PathProgramCache]: Analyzing trace with hash -843695115, now seen corresponding path program 14 times [2023-08-24 08:03:12,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:12,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707482020] [2023-08-24 08:03:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:12,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:12,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:12,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707482020] [2023-08-24 08:03:12,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707482020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:12,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969982059] [2023-08-24 08:03:12,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:03:12,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:12,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:12,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:12,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 08:03:12,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:03:12,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:12,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:03:12,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:12,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:13,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969982059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:13,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:13,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-24 08:03:13,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994490316] [2023-08-24 08:03:13,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:13,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:03:13,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:03:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:03:13,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:13,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 278 transitions, 2911 flow. Second operand has 19 states, 19 states have (on average 51.89473684210526) internal successors, (986), 19 states have internal predecessors, (986), 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 08:03:13,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:13,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:13,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:15,702 INFO L124 PetriNetUnfolderBase]: 675/1284 cut-off events. [2023-08-24 08:03:15,703 INFO L125 PetriNetUnfolderBase]: For 12577/12577 co-relation queries the response was YES. [2023-08-24 08:03:15,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7840 conditions, 1284 events. 675/1284 cut-off events. For 12577/12577 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7501 event pairs, 60 based on Foata normal form. 3/1261 useless extension candidates. Maximal degree in co-relation 7771. Up to 984 conditions per place. [2023-08-24 08:03:15,712 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 234 selfloop transitions, 99 changer transitions 17/350 dead transitions. [2023-08-24 08:03:15,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 350 transitions, 4299 flow [2023-08-24 08:03:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:03:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:03:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1327 transitions. [2023-08-24 08:03:15,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949404761904762 [2023-08-24 08:03:15,713 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1327 transitions. [2023-08-24 08:03:15,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1327 transitions. [2023-08-24 08:03:15,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:15,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1327 transitions. [2023-08-24 08:03:15,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.291666666666664) internal successors, (1327), 24 states have internal predecessors, (1327), 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 08:03:15,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 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 08:03:15,718 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 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 08:03:15,718 INFO L175 Difference]: Start difference. First operand has 242 places, 278 transitions, 2911 flow. Second operand 24 states and 1327 transitions. [2023-08-24 08:03:15,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 350 transitions, 4299 flow [2023-08-24 08:03:15,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 350 transitions, 4126 flow, removed 50 selfloop flow, removed 17 redundant places. [2023-08-24 08:03:15,779 INFO L231 Difference]: Finished difference. Result has 249 places, 292 transitions, 3364 flow [2023-08-24 08:03:15,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3364, PETRI_PLACES=249, PETRI_TRANSITIONS=292} [2023-08-24 08:03:15,780 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2023-08-24 08:03:15,780 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 292 transitions, 3364 flow [2023-08-24 08:03:15,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.89473684210526) internal successors, (986), 19 states have internal predecessors, (986), 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 08:03:15,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:15,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:15,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:15,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 08:03:15,986 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:15,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash -517482929, now seen corresponding path program 15 times [2023-08-24 08:03:15,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:15,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234733387] [2023-08-24 08:03:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:15,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:16,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234733387] [2023-08-24 08:03:16,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234733387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35949742] [2023-08-24 08:03:16,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:03:16,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:16,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:16,337 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:16,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 08:03:16,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:03:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:16,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:03:16,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:16,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:19,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35949742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:19,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:19,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:03:19,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400294273] [2023-08-24 08:03:19,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:19,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:03:19,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:19,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:03:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:03:19,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:19,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 292 transitions, 3364 flow. Second operand has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:03:19,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:19,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:19,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:20,585 INFO L124 PetriNetUnfolderBase]: 699/1324 cut-off events. [2023-08-24 08:03:20,585 INFO L125 PetriNetUnfolderBase]: For 16220/16220 co-relation queries the response was YES. [2023-08-24 08:03:20,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8648 conditions, 1324 events. 699/1324 cut-off events. For 16220/16220 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7712 event pairs, 66 based on Foata normal form. 2/1300 useless extension candidates. Maximal degree in co-relation 8577. Up to 1158 conditions per place. [2023-08-24 08:03:20,594 INFO L140 encePairwiseOnDemand]: 131/140 looper letters, 276 selfloop transitions, 56 changer transitions 10/342 dead transitions. [2023-08-24 08:03:20,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 342 transitions, 4560 flow [2023-08-24 08:03:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:03:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:03:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1145 transitions. [2023-08-24 08:03:20,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38945578231292516 [2023-08-24 08:03:20,596 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1145 transitions. [2023-08-24 08:03:20,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1145 transitions. [2023-08-24 08:03:20,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:20,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1145 transitions. [2023-08-24 08:03:20,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 54.523809523809526) internal successors, (1145), 21 states have internal predecessors, (1145), 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 08:03:20,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 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 08:03:20,601 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 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 08:03:20,601 INFO L175 Difference]: Start difference. First operand has 249 places, 292 transitions, 3364 flow. Second operand 21 states and 1145 transitions. [2023-08-24 08:03:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 342 transitions, 4560 flow [2023-08-24 08:03:20,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 342 transitions, 4218 flow, removed 132 selfloop flow, removed 13 redundant places. [2023-08-24 08:03:20,677 INFO L231 Difference]: Finished difference. Result has 258 places, 302 transitions, 3458 flow [2023-08-24 08:03:20,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3458, PETRI_PLACES=258, PETRI_TRANSITIONS=302} [2023-08-24 08:03:20,678 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2023-08-24 08:03:20,678 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 302 transitions, 3458 flow [2023-08-24 08:03:20,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:03:20,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:20,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:20,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:20,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:20,883 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:20,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash 301538768, now seen corresponding path program 16 times [2023-08-24 08:03:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:20,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709150707] [2023-08-24 08:03:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:20,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:22,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:22,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709150707] [2023-08-24 08:03:22,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709150707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:22,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541755002] [2023-08-24 08:03:22,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:03:22,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:22,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:22,276 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:22,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 08:03:22,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:03:22,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:22,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 08:03:22,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:22,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:26,267 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* (div c_~x_2~0 4294967296) 4294967296)) (.cse2 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (.cse4 (div (+ (mod c_~x_2~0 4294967296) (- 4294967294)) 4294967296))) (and (forall ((v_z_242 Int)) (or (let ((.cse0 (* 2 v_z_242))) (< (+ .cse0 c_~x_1~0 .cse1) (+ c_~x_2~0 3 (* (div (+ .cse0 c_~x_1~0) 4294967296) 4294967296)))) (< .cse2 v_z_242) (<= v_z_242 .cse3))) (or (< 0 (+ .cse4 1)) (forall ((v_z_242 Int)) (or (let ((.cse5 (* 2 v_z_242))) (< (+ c_~x_2~0 1 (* (div (+ .cse5 c_~x_1~0) 4294967296) 4294967296)) (+ .cse5 c_~x_1~0 .cse1))) (< .cse2 v_z_242) (<= v_z_242 .cse3)))) (forall ((v_z_242 Int)) (or (< .cse2 v_z_242) (<= v_z_242 .cse3) (let ((.cse6 (* 2 v_z_242))) (< (+ c_~x_2~0 (* (div (+ .cse6 c_~x_1~0) 4294967296) 4294967296)) (+ .cse6 c_~x_1~0 4294967295 .cse1))))) (or (forall ((v_z_242 Int)) (or (let ((.cse7 (* 2 v_z_242))) (< (+ .cse7 c_~x_1~0 (* .cse4 4294967296) .cse1 4294967293) (+ c_~x_2~0 (* (div (+ .cse7 c_~x_1~0) 4294967296) 4294967296)))) (< .cse2 v_z_242) (<= v_z_242 .cse3))) (< .cse4 0)))) is different from false [2023-08-24 08:03:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 08:03:26,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541755002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:26,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:26,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-24 08:03:26,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808713677] [2023-08-24 08:03:26,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:26,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:03:26,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:03:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=329, Unknown=1, NotChecked=38, Total=462 [2023-08-24 08:03:26,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:26,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 302 transitions, 3458 flow. Second operand has 22 states, 22 states have (on average 51.72727272727273) internal successors, (1138), 22 states have internal predecessors, (1138), 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 08:03:26,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:26,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:26,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:30,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:03:33,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:03:36,020 INFO L124 PetriNetUnfolderBase]: 770/1481 cut-off events. [2023-08-24 08:03:36,021 INFO L125 PetriNetUnfolderBase]: For 19126/19126 co-relation queries the response was YES. [2023-08-24 08:03:36,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9781 conditions, 1481 events. 770/1481 cut-off events. For 19126/19126 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8917 event pairs, 70 based on Foata normal form. 5/1462 useless extension candidates. Maximal degree in co-relation 9707. Up to 1063 conditions per place. [2023-08-24 08:03:36,032 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 260 selfloop transitions, 129 changer transitions 17/406 dead transitions. [2023-08-24 08:03:36,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 406 transitions, 5297 flow [2023-08-24 08:03:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:03:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:03:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1709 transitions. [2023-08-24 08:03:36,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.393778801843318 [2023-08-24 08:03:36,035 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1709 transitions. [2023-08-24 08:03:36,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1709 transitions. [2023-08-24 08:03:36,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:36,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1709 transitions. [2023-08-24 08:03:36,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.12903225806452) internal successors, (1709), 31 states have internal predecessors, (1709), 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 08:03:36,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 140.0) internal successors, (4480), 32 states have internal predecessors, (4480), 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 08:03:36,042 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 140.0) internal successors, (4480), 32 states have internal predecessors, (4480), 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 08:03:36,042 INFO L175 Difference]: Start difference. First operand has 258 places, 302 transitions, 3458 flow. Second operand 31 states and 1709 transitions. [2023-08-24 08:03:36,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 406 transitions, 5297 flow [2023-08-24 08:03:36,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 406 transitions, 5036 flow, removed 92 selfloop flow, removed 19 redundant places. [2023-08-24 08:03:36,188 INFO L231 Difference]: Finished difference. Result has 273 places, 331 transitions, 4208 flow [2023-08-24 08:03:36,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=3196, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4208, PETRI_PLACES=273, PETRI_TRANSITIONS=331} [2023-08-24 08:03:36,189 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 253 predicate places. [2023-08-24 08:03:36,189 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 331 transitions, 4208 flow [2023-08-24 08:03:36,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 51.72727272727273) internal successors, (1138), 22 states have internal predecessors, (1138), 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 08:03:36,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:36,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:36,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:36,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:36,395 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:36,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:36,395 INFO L85 PathProgramCache]: Analyzing trace with hash -530744729, now seen corresponding path program 17 times [2023-08-24 08:03:36,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:36,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390860825] [2023-08-24 08:03:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:36,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:36,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:36,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390860825] [2023-08-24 08:03:36,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390860825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:36,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819806217] [2023-08-24 08:03:36,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:03:36,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:36,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:36,745 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:36,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 08:03:36,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:03:36,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:36,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:03:36,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:36,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:39,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819806217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:39,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:39,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:03:39,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645867676] [2023-08-24 08:03:39,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:39,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:03:39,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:03:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:03:39,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:39,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 331 transitions, 4208 flow. Second operand has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 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 08:03:39,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:39,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:39,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:40,857 INFO L124 PetriNetUnfolderBase]: 766/1466 cut-off events. [2023-08-24 08:03:40,857 INFO L125 PetriNetUnfolderBase]: For 19266/19266 co-relation queries the response was YES. [2023-08-24 08:03:40,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9978 conditions, 1466 events. 766/1466 cut-off events. For 19266/19266 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 8786 event pairs, 74 based on Foata normal form. 2/1444 useless extension candidates. Maximal degree in co-relation 9901. Up to 1297 conditions per place. [2023-08-24 08:03:40,867 INFO L140 encePairwiseOnDemand]: 131/140 looper letters, 312 selfloop transitions, 57 changer transitions 10/379 dead transitions. [2023-08-24 08:03:40,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 379 transitions, 5245 flow [2023-08-24 08:03:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 08:03:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 08:03:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1207 transitions. [2023-08-24 08:03:40,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3918831168831169 [2023-08-24 08:03:40,874 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1207 transitions. [2023-08-24 08:03:40,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1207 transitions. [2023-08-24 08:03:40,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:40,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1207 transitions. [2023-08-24 08:03:40,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 54.86363636363637) internal successors, (1207), 22 states have internal predecessors, (1207), 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 08:03:40,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 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 08:03:40,880 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 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 08:03:40,880 INFO L175 Difference]: Start difference. First operand has 273 places, 331 transitions, 4208 flow. Second operand 22 states and 1207 transitions. [2023-08-24 08:03:40,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 379 transitions, 5245 flow [2023-08-24 08:03:40,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 379 transitions, 4650 flow, removed 235 selfloop flow, removed 19 redundant places. [2023-08-24 08:03:40,995 INFO L231 Difference]: Finished difference. Result has 276 places, 334 transitions, 3876 flow [2023-08-24 08:03:40,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3876, PETRI_PLACES=276, PETRI_TRANSITIONS=334} [2023-08-24 08:03:40,995 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-08-24 08:03:40,996 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 334 transitions, 3876 flow [2023-08-24 08:03:40,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 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 08:03:40,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:40,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:41,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 08:03:41,197 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:41,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1199052185, now seen corresponding path program 18 times [2023-08-24 08:03:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:41,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881026390] [2023-08-24 08:03:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:41,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:41,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881026390] [2023-08-24 08:03:41,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881026390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:41,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464453182] [2023-08-24 08:03:41,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:03:41,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:41,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:41,515 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:41,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 08:03:41,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:03:41,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:41,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:03:41,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:41,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:44,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464453182] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:44,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:44,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:03:44,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566252970] [2023-08-24 08:03:44,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:44,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:03:44,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:44,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:03:44,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:03:44,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:44,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 334 transitions, 3876 flow. Second operand has 18 states, 18 states have (on average 51.94444444444444) internal successors, (935), 18 states have internal predecessors, (935), 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 08:03:44,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:44,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:44,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:45,728 INFO L124 PetriNetUnfolderBase]: 794/1518 cut-off events. [2023-08-24 08:03:45,728 INFO L125 PetriNetUnfolderBase]: For 19838/19838 co-relation queries the response was YES. [2023-08-24 08:03:45,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10247 conditions, 1518 events. 794/1518 cut-off events. For 19838/19838 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 9170 event pairs, 80 based on Foata normal form. 2/1494 useless extension candidates. Maximal degree in co-relation 10169. Up to 1371 conditions per place. [2023-08-24 08:03:45,739 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 318 selfloop transitions, 54 changer transitions 10/382 dead transitions. [2023-08-24 08:03:45,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 382 transitions, 5314 flow [2023-08-24 08:03:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:03:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:03:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 932 transitions. [2023-08-24 08:03:45,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915966386554622 [2023-08-24 08:03:45,741 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 932 transitions. [2023-08-24 08:03:45,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 932 transitions. [2023-08-24 08:03:45,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:45,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 932 transitions. [2023-08-24 08:03:45,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 54.8235294117647) internal successors, (932), 17 states have internal predecessors, (932), 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 08:03:45,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 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 08:03:45,744 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 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 08:03:45,744 INFO L175 Difference]: Start difference. First operand has 276 places, 334 transitions, 3876 flow. Second operand 17 states and 932 transitions. [2023-08-24 08:03:45,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 382 transitions, 5314 flow [2023-08-24 08:03:45,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 382 transitions, 5045 flow, removed 98 selfloop flow, removed 19 redundant places. [2023-08-24 08:03:45,833 INFO L231 Difference]: Finished difference. Result has 277 places, 347 transitions, 4206 flow [2023-08-24 08:03:45,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4206, PETRI_PLACES=277, PETRI_TRANSITIONS=347} [2023-08-24 08:03:45,834 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 257 predicate places. [2023-08-24 08:03:45,834 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 347 transitions, 4206 flow [2023-08-24 08:03:45,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.94444444444444) internal successors, (935), 18 states have internal predecessors, (935), 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 08:03:45,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:45,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:45,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:46,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 08:03:46,035 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:46,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1212753697, now seen corresponding path program 19 times [2023-08-24 08:03:46,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:46,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448543260] [2023-08-24 08:03:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:46,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448543260] [2023-08-24 08:03:46,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448543260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347515036] [2023-08-24 08:03:46,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:03:46,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:46,332 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:46,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 08:03:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:46,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:03:46,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:46,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:48,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347515036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:48,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:48,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:03:48,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909305446] [2023-08-24 08:03:48,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:48,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:03:48,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:48,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:03:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:03:48,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:48,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 347 transitions, 4206 flow. Second operand has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:03:48,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:48,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:48,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:49,402 INFO L124 PetriNetUnfolderBase]: 797/1534 cut-off events. [2023-08-24 08:03:49,403 INFO L125 PetriNetUnfolderBase]: For 20735/20735 co-relation queries the response was YES. [2023-08-24 08:03:49,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10476 conditions, 1534 events. 797/1534 cut-off events. For 20735/20735 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 9340 event pairs, 86 based on Foata normal form. 3/1511 useless extension candidates. Maximal degree in co-relation 10395. Up to 1441 conditions per place. [2023-08-24 08:03:49,413 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 333 selfloop transitions, 40 changer transitions 8/381 dead transitions. [2023-08-24 08:03:49,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 381 transitions, 5376 flow [2023-08-24 08:03:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:03:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:03:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 874 transitions. [2023-08-24 08:03:49,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39017857142857143 [2023-08-24 08:03:49,415 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 874 transitions. [2023-08-24 08:03:49,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 874 transitions. [2023-08-24 08:03:49,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:49,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 874 transitions. [2023-08-24 08:03:49,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 54.625) internal successors, (874), 16 states have internal predecessors, (874), 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 08:03:49,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 140.0) internal successors, (2380), 17 states have internal predecessors, (2380), 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 08:03:49,417 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 140.0) internal successors, (2380), 17 states have internal predecessors, (2380), 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 08:03:49,417 INFO L175 Difference]: Start difference. First operand has 277 places, 347 transitions, 4206 flow. Second operand 16 states and 874 transitions. [2023-08-24 08:03:49,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 381 transitions, 5376 flow [2023-08-24 08:03:49,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 381 transitions, 4949 flow, removed 196 selfloop flow, removed 9 redundant places. [2023-08-24 08:03:49,513 INFO L231 Difference]: Finished difference. Result has 286 places, 352 transitions, 4136 flow [2023-08-24 08:03:49,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=3893, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4136, PETRI_PLACES=286, PETRI_TRANSITIONS=352} [2023-08-24 08:03:49,513 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 266 predicate places. [2023-08-24 08:03:49,514 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 352 transitions, 4136 flow [2023-08-24 08:03:49,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:03:49,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:49,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:49,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:49,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 08:03:49,719 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:49,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1211564405, now seen corresponding path program 20 times [2023-08-24 08:03:49,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:49,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684781969] [2023-08-24 08:03:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:49,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:50,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:50,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684781969] [2023-08-24 08:03:50,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684781969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:50,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438992837] [2023-08-24 08:03:50,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:03:50,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:50,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:50,071 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:50,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 08:03:50,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:03:50,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:50,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 08:03:50,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:50,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438992837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:52,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:52,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-24 08:03:52,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157004017] [2023-08-24 08:03:52,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:52,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:03:52,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:03:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:03:52,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:03:52,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 352 transitions, 4136 flow. Second operand has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:03:52,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:52,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:03:52,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:53,998 INFO L124 PetriNetUnfolderBase]: 795/1529 cut-off events. [2023-08-24 08:03:53,999 INFO L125 PetriNetUnfolderBase]: For 18454/18454 co-relation queries the response was YES. [2023-08-24 08:03:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10027 conditions, 1529 events. 795/1529 cut-off events. For 18454/18454 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 9277 event pairs, 80 based on Foata normal form. 2/1503 useless extension candidates. Maximal degree in co-relation 9942. Up to 1380 conditions per place. [2023-08-24 08:03:54,009 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 322 selfloop transitions, 59 changer transitions 8/389 dead transitions. [2023-08-24 08:03:54,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 389 transitions, 5177 flow [2023-08-24 08:03:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 08:03:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 08:03:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 988 transitions. [2023-08-24 08:03:54,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39206349206349206 [2023-08-24 08:03:54,011 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 988 transitions. [2023-08-24 08:03:54,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 988 transitions. [2023-08-24 08:03:54,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:54,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 988 transitions. [2023-08-24 08:03:54,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 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 08:03:54,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 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 08:03:54,014 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 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 08:03:54,014 INFO L175 Difference]: Start difference. First operand has 286 places, 352 transitions, 4136 flow. Second operand 18 states and 988 transitions. [2023-08-24 08:03:54,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 389 transitions, 5177 flow [2023-08-24 08:03:54,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 389 transitions, 5019 flow, removed 50 selfloop flow, removed 11 redundant places. [2023-08-24 08:03:54,109 INFO L231 Difference]: Finished difference. Result has 294 places, 355 transitions, 4222 flow [2023-08-24 08:03:54,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=3978, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4222, PETRI_PLACES=294, PETRI_TRANSITIONS=355} [2023-08-24 08:03:54,109 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 274 predicate places. [2023-08-24 08:03:54,110 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 355 transitions, 4222 flow [2023-08-24 08:03:54,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.888888888888886) internal successors, (934), 18 states have internal predecessors, (934), 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 08:03:54,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:54,110 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:54,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:54,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 08:03:54,315 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:54,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 434855503, now seen corresponding path program 5 times [2023-08-24 08:03:54,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:54,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55297919] [2023-08-24 08:03:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:54,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:54,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:54,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55297919] [2023-08-24 08:03:54,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55297919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48053203] [2023-08-24 08:03:54,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:03:54,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:54,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:54,501 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:54,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 08:03:54,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:03:54,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:54,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 08:03:54,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:54,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:03:54,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48053203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:54,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:54,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 12 [2023-08-24 08:03:54,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725393035] [2023-08-24 08:03:54,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:54,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:03:54,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:03:54,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:03:54,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 140 [2023-08-24 08:03:54,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 355 transitions, 4222 flow. Second operand has 14 states, 14 states have (on average 60.642857142857146) internal successors, (849), 14 states have internal predecessors, (849), 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 08:03:54,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:54,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 140 [2023-08-24 08:03:54,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:55,626 INFO L124 PetriNetUnfolderBase]: 788/1535 cut-off events. [2023-08-24 08:03:55,627 INFO L125 PetriNetUnfolderBase]: For 19951/19955 co-relation queries the response was YES. [2023-08-24 08:03:55,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10148 conditions, 1535 events. 788/1535 cut-off events. For 19951/19955 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 9476 event pairs, 46 based on Foata normal form. 9/1516 useless extension candidates. Maximal degree in co-relation 10062. Up to 1247 conditions per place. [2023-08-24 08:03:55,643 INFO L140 encePairwiseOnDemand]: 134/140 looper letters, 309 selfloop transitions, 70 changer transitions 25/411 dead transitions. [2023-08-24 08:03:55,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 411 transitions, 5510 flow [2023-08-24 08:03:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:03:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:03:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1081 transitions. [2023-08-24 08:03:55,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542016806722689 [2023-08-24 08:03:55,645 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1081 transitions. [2023-08-24 08:03:55,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1081 transitions. [2023-08-24 08:03:55,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:55,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1081 transitions. [2023-08-24 08:03:55,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.588235294117645) internal successors, (1081), 17 states have internal predecessors, (1081), 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 08:03:55,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 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 08:03:55,649 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 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 08:03:55,649 INFO L175 Difference]: Start difference. First operand has 294 places, 355 transitions, 4222 flow. Second operand 17 states and 1081 transitions. [2023-08-24 08:03:55,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 411 transitions, 5510 flow [2023-08-24 08:03:55,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 411 transitions, 5262 flow, removed 87 selfloop flow, removed 16 redundant places. [2023-08-24 08:03:55,775 INFO L231 Difference]: Finished difference. Result has 296 places, 354 transitions, 4158 flow [2023-08-24 08:03:55,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=3974, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4158, PETRI_PLACES=296, PETRI_TRANSITIONS=354} [2023-08-24 08:03:55,776 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-08-24 08:03:55,776 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 354 transitions, 4158 flow [2023-08-24 08:03:55,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.642857142857146) internal successors, (849), 14 states have internal predecessors, (849), 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 08:03:55,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:55,776 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:55,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:55,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 08:03:55,978 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:55,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash -128195467, now seen corresponding path program 6 times [2023-08-24 08:03:55,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:55,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370367774] [2023-08-24 08:03:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:55,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:56,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:56,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370367774] [2023-08-24 08:03:56,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370367774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:56,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884246195] [2023-08-24 08:03:56,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:03:56,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:56,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:56,221 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:56,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 08:03:56,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:03:56,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:56,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 08:03:56,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:56,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:04:23,766 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 31 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:04:32,021 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_305 Int) (v_z_305 Int)) (let ((.cse2 (+ (* v_y_305 4294967296) (* 2863311531 v_z_305))) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_305)) (.cse0 (mod c_~x_2~0 4294967296))) (or (< v_z_305 0) (= .cse0 .cse1) (< 0 .cse2) (< .cse2 0) (= .cse1 (+ .cse0 4294967296)) (<= 4294967296 v_z_305)))) is different from false [2023-08-24 08:04:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:38,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884246195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:04:38,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:04:38,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 20 [2023-08-24 08:04:38,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653717677] [2023-08-24 08:04:38,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:04:38,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:04:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:04:38,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:04:38,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=315, Unknown=6, NotChecked=38, Total=462 [2023-08-24 08:04:38,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:04:38,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 354 transitions, 4158 flow. Second operand has 22 states, 22 states have (on average 52.0) internal successors, (1144), 22 states have internal predecessors, (1144), 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 08:04:38,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:04:38,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:04:38,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:04:40,907 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 08:04:42,932 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_~x_1~0 0) (forall ((v_y_305 Int) (v_z_305 Int)) (let ((.cse2 (+ (* v_y_305 4294967296) (* 2863311531 v_z_305))) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_305)) (.cse0 (mod c_~x_2~0 4294967296))) (or (< v_z_305 0) (= .cse0 .cse1) (< 0 .cse2) (< .cse2 0) (= .cse1 (+ .cse0 4294967296)) (<= 4294967296 v_z_305))))) is different from false [2023-08-24 08:04:44,970 WARN L839 $PredicateComparison]: unable to prove that (and (or (< 4294967294 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (forall ((v_y_305 Int) (v_z_305 Int)) (let ((.cse2 (+ (* v_y_305 4294967296) (* 2863311531 v_z_305))) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_305)) (.cse0 (mod c_~x_2~0 4294967296))) (or (< v_z_305 0) (= .cse0 .cse1) (< 0 .cse2) (< .cse2 0) (= .cse1 (+ .cse0 4294967296)) (<= 4294967296 v_z_305))))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)) is different from false [2023-08-24 08:04:47,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:49,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:51,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:55,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:04:57,158 WARN L539 Checker$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 08:04:58,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:00,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:05,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:07,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:11,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:38,219 WARN L234 SmtUtils]: Spent 20.35s on a formula simplification. DAG size of input: 47 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:05:40,225 WARN L539 Checker$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 08:05:42,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:44,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:48,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:53,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:55,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:57,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:05:59,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:01,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:03,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:05,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:07,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:09,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:11,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:13,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:15,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:17,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:19,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:21,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:23,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:25,577 WARN L539 Checker$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 08:06:27,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:29,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:46,595 WARN L234 SmtUtils]: Spent 10.82s on a formula simplification. DAG size of input: 50 DAG size of output: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:06:48,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:50,856 WARN L539 Checker$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 08:06:52,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:06:53,021 INFO L124 PetriNetUnfolderBase]: 936/1825 cut-off events. [2023-08-24 08:06:53,021 INFO L125 PetriNetUnfolderBase]: For 28420/28420 co-relation queries the response was YES. [2023-08-24 08:06:53,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13068 conditions, 1825 events. 936/1825 cut-off events. For 28420/28420 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 11669 event pairs, 57 based on Foata normal form. 4/1799 useless extension candidates. Maximal degree in co-relation 12983. Up to 1316 conditions per place. [2023-08-24 08:06:53,035 INFO L140 encePairwiseOnDemand]: 126/140 looper letters, 356 selfloop transitions, 114 changer transitions 15/485 dead transitions. [2023-08-24 08:06:53,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 485 transitions, 6844 flow [2023-08-24 08:06:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:06:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:06:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1278 transitions. [2023-08-24 08:06:53,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968944099378882 [2023-08-24 08:06:53,037 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1278 transitions. [2023-08-24 08:06:53,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1278 transitions. [2023-08-24 08:06:53,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:06:53,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1278 transitions. [2023-08-24 08:06:53,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.56521739130435) internal successors, (1278), 23 states have internal predecessors, (1278), 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 08:06:53,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 140.0) internal successors, (3360), 24 states have internal predecessors, (3360), 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 08:06:53,042 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 140.0) internal successors, (3360), 24 states have internal predecessors, (3360), 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 08:06:53,042 INFO L175 Difference]: Start difference. First operand has 296 places, 354 transitions, 4158 flow. Second operand 23 states and 1278 transitions. [2023-08-24 08:06:53,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 485 transitions, 6844 flow [2023-08-24 08:06:53,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 485 transitions, 6667 flow, removed 17 selfloop flow, removed 13 redundant places. [2023-08-24 08:06:53,170 INFO L231 Difference]: Finished difference. Result has 313 places, 409 transitions, 5425 flow [2023-08-24 08:06:53,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5425, PETRI_PLACES=313, PETRI_TRANSITIONS=409} [2023-08-24 08:06:53,171 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 293 predicate places. [2023-08-24 08:06:53,171 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 409 transitions, 5425 flow [2023-08-24 08:06:53,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.0) internal successors, (1144), 22 states have internal predecessors, (1144), 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 08:06:53,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:06:53,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:06:53,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 08:06:53,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:06:53,372 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:06:53,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:06:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash 605763052, now seen corresponding path program 21 times [2023-08-24 08:06:53,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:06:53,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994808] [2023-08-24 08:06:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:06:53,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:06:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:06:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:53,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:06:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994808] [2023-08-24 08:06:53,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:06:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333766679] [2023-08-24 08:06:53,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:06:53,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:06:53,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:06:53,919 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:06:53,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 08:06:54,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:06:54,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:06:54,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 08:06:54,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:06:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:54,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:07:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:00,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333766679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:07:00,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:07:00,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 08:07:00,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987471596] [2023-08-24 08:07:00,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:07:00,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:07:00,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:07:00,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:07:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=304, Unknown=1, NotChecked=0, Total=380 [2023-08-24 08:07:00,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:07:00,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 409 transitions, 5425 flow. Second operand has 20 states, 20 states have (on average 51.85) internal successors, (1037), 20 states have internal predecessors, (1037), 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 08:07:00,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:07:00,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:07:00,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:07:02,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:07:06,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:07:12,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:07:14,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:07:17,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:07:21,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:07:22,003 INFO L124 PetriNetUnfolderBase]: 980/1930 cut-off events. [2023-08-24 08:07:22,004 INFO L125 PetriNetUnfolderBase]: For 35537/35537 co-relation queries the response was YES. [2023-08-24 08:07:22,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15378 conditions, 1930 events. 980/1930 cut-off events. For 35537/35537 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 12659 event pairs, 84 based on Foata normal form. 3/1909 useless extension candidates. Maximal degree in co-relation 15286. Up to 1612 conditions per place. [2023-08-24 08:07:22,020 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 351 selfloop transitions, 121 changer transitions 19/491 dead transitions. [2023-08-24 08:07:22,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 491 transitions, 7216 flow [2023-08-24 08:07:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 08:07:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 08:07:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1487 transitions. [2023-08-24 08:07:22,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933862433862434 [2023-08-24 08:07:22,026 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1487 transitions. [2023-08-24 08:07:22,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1487 transitions. [2023-08-24 08:07:22,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:07:22,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1487 transitions. [2023-08-24 08:07:22,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.074074074074076) internal successors, (1487), 27 states have internal predecessors, (1487), 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 08:07:22,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 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 08:07:22,034 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 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 08:07:22,034 INFO L175 Difference]: Start difference. First operand has 313 places, 409 transitions, 5425 flow. Second operand 27 states and 1487 transitions. [2023-08-24 08:07:22,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 491 transitions, 7216 flow [2023-08-24 08:07:22,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 491 transitions, 7009 flow, removed 99 selfloop flow, removed 2 redundant places. [2023-08-24 08:07:22,201 INFO L231 Difference]: Finished difference. Result has 345 places, 427 transitions, 5909 flow [2023-08-24 08:07:22,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=5278, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5909, PETRI_PLACES=345, PETRI_TRANSITIONS=427} [2023-08-24 08:07:22,202 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 325 predicate places. [2023-08-24 08:07:22,202 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 427 transitions, 5909 flow [2023-08-24 08:07:22,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.85) internal successors, (1037), 20 states have internal predecessors, (1037), 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 08:07:22,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:07:22,202 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:07:22,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 08:07:22,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-24 08:07:22,407 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:07:22,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:07:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash -154711805, now seen corresponding path program 7 times [2023-08-24 08:07:22,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:07:22,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098628096] [2023-08-24 08:07:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:07:22,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:07:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:07:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:22,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:07:22,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098628096] [2023-08-24 08:07:22,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098628096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:07:22,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692164046] [2023-08-24 08:07:22,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:07:22,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:07:22,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:07:22,584 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:07:22,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 08:07:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:07:22,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 08:07:22,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:07:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:22,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:07:45,338 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_~x_2~0 4294967296)) (.cse3 (mod c_~x_1~0 4294967296))) (and (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse1 (+ .cse3 v_z_327)) (.cse0 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (< v_z_327 0) (<= 4294967296 v_z_327) (< 0 .cse0) (= .cse1 (+ .cse2 4294967296)) (= .cse1 .cse2) (< .cse0 0)))) (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse5 (+ .cse3 v_z_327)) (.cse4 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (< v_z_327 0) (< 0 .cse4) (= .cse5 .cse2) (<= 4294967296 .cse5) (< .cse4 0)))) (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse6 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (<= 4294967296 v_z_327) (< 0 .cse6) (< .cse6 0) (< (+ .cse3 v_z_327) 4294967296)))))) is different from false [2023-08-24 08:08:40,486 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse1 (+ .cse3 v_z_327)) (.cse0 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (< v_z_327 0) (< 0 .cse0) (= .cse1 .cse2) (<= 4294967296 .cse1) (< .cse0 0)))) (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse4 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (<= 4294967296 v_z_327) (< 0 .cse4) (< .cse4 0) (< (+ .cse3 v_z_327) 4294967296)))) (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse5 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (< v_z_327 0) (<= 4294967296 v_z_327) (< 0 .cse5) (= (+ .cse3 v_z_327) .cse2) (< .cse5 0)))))) is different from false [2023-08-24 08:08:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-24 08:08:40,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692164046] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:08:40,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:08:40,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 15 [2023-08-24 08:08:40,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133759379] [2023-08-24 08:08:40,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:08:40,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:08:40,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:08:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:08:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=153, Unknown=2, NotChecked=54, Total=272 [2023-08-24 08:08:40,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 140 [2023-08-24 08:08:40,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 427 transitions, 5909 flow. Second operand has 17 states, 17 states have (on average 60.1764705882353) internal successors, (1023), 17 states have internal predecessors, (1023), 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 08:08:40,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:08:40,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 140 [2023-08-24 08:08:40,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:08:42,518 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse1 (+ .cse3 v_z_327)) (.cse0 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (< v_z_327 0) (< 0 .cse0) (= .cse1 .cse2) (<= 4294967296 .cse1) (< .cse0 0)))) (= c_~x_2~0 0) (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse4 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (<= 4294967296 v_z_327) (< 0 .cse4) (< .cse4 0) (< (+ .cse3 v_z_327) 4294967296)))) (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse5 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (< v_z_327 0) (<= 4294967296 v_z_327) (< 0 .cse5) (= (+ .cse3 v_z_327) .cse2) (< .cse5 0)))) (= c_~x_1~0 0))) is different from false [2023-08-24 08:08:44,538 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_~x_2~0 4294967296)) (.cse3 (mod c_~x_1~0 4294967296))) (and (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse1 (+ .cse3 v_z_327)) (.cse0 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (< v_z_327 0) (<= 4294967296 v_z_327) (< 0 .cse0) (= .cse1 (+ .cse2 4294967296)) (= .cse1 .cse2) (< .cse0 0)))) (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse5 (+ .cse3 v_z_327)) (.cse4 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (< v_z_327 0) (< 0 .cse4) (= .cse5 .cse2) (<= 4294967296 .cse5) (< .cse4 0)))) (= c_~x_2~0 0) (forall ((v_y_327 Int) (v_z_327 Int)) (let ((.cse6 (+ (* v_y_327 4294967296) (* 2863311531 v_z_327)))) (or (<= 4294967296 v_z_327) (< 0 .cse6) (< .cse6 0) (< (+ .cse3 v_z_327) 4294967296)))) (= c_~x_1~0 0))) is different from false [2023-08-24 08:08:45,838 INFO L124 PetriNetUnfolderBase]: 1010/1998 cut-off events. [2023-08-24 08:08:45,839 INFO L125 PetriNetUnfolderBase]: For 41212/41216 co-relation queries the response was YES. [2023-08-24 08:08:45,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16642 conditions, 1998 events. 1010/1998 cut-off events. For 41212/41216 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 13222 event pairs, 85 based on Foata normal form. 10/1984 useless extension candidates. Maximal degree in co-relation 16541. Up to 1312 conditions per place. [2023-08-24 08:08:45,858 INFO L140 encePairwiseOnDemand]: 133/140 looper letters, 354 selfloop transitions, 76 changer transitions 51/490 dead transitions. [2023-08-24 08:08:45,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 490 transitions, 7854 flow [2023-08-24 08:08:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:08:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 08:08:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 894 transitions. [2023-08-24 08:08:45,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561224489795918 [2023-08-24 08:08:45,862 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 894 transitions. [2023-08-24 08:08:45,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 894 transitions. [2023-08-24 08:08:45,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:08:45,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 894 transitions. [2023-08-24 08:08:45,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 63.857142857142854) internal successors, (894), 14 states have internal predecessors, (894), 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 08:08:45,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 140.0) internal successors, (2100), 15 states have internal predecessors, (2100), 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 08:08:45,869 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 140.0) internal successors, (2100), 15 states have internal predecessors, (2100), 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 08:08:45,869 INFO L175 Difference]: Start difference. First operand has 345 places, 427 transitions, 5909 flow. Second operand 14 states and 894 transitions. [2023-08-24 08:08:45,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 490 transitions, 7854 flow [2023-08-24 08:08:46,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 490 transitions, 7549 flow, removed 89 selfloop flow, removed 18 redundant places. [2023-08-24 08:08:46,173 INFO L231 Difference]: Finished difference. Result has 343 places, 406 transitions, 5631 flow [2023-08-24 08:08:46,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5631, PETRI_PLACES=343, PETRI_TRANSITIONS=406} [2023-08-24 08:08:46,174 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 323 predicate places. [2023-08-24 08:08:46,175 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 406 transitions, 5631 flow [2023-08-24 08:08:46,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 60.1764705882353) internal successors, (1023), 17 states have internal predecessors, (1023), 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 08:08:46,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:08:46,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:08:46,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 08:08:46,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:08:46,380 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:08:46,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:08:46,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1088175514, now seen corresponding path program 22 times [2023-08-24 08:08:46,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:08:46,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29503048] [2023-08-24 08:08:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:08:46,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:08:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:08:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:46,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:08:46,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29503048] [2023-08-24 08:08:46,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29503048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:08:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815822964] [2023-08-24 08:08:46,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:08:46,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:08:46,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:08:46,905 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:08:46,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 08:08:47,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:08:47,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:08:47,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 08:08:47,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:08:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:47,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:08:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:49,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815822964] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:08:49,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:08:49,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 08:08:49,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114070631] [2023-08-24 08:08:49,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:08:49,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:08:49,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:08:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:08:49,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-24 08:08:49,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:08:49,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 406 transitions, 5631 flow. Second operand has 20 states, 20 states have (on average 51.8) internal successors, (1036), 20 states have internal predecessors, (1036), 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 08:08:49,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:08:49,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:08:49,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:08:51,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:08:54,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:08:56,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:09:00,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:09:02,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:09:03,075 INFO L124 PetriNetUnfolderBase]: 954/1857 cut-off events. [2023-08-24 08:09:03,076 INFO L125 PetriNetUnfolderBase]: For 37159/37159 co-relation queries the response was YES. [2023-08-24 08:09:03,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15614 conditions, 1857 events. 954/1857 cut-off events. For 37159/37159 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 11855 event pairs, 108 based on Foata normal form. 2/1835 useless extension candidates. Maximal degree in co-relation 15512. Up to 1678 conditions per place. [2023-08-24 08:09:03,092 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 332 selfloop transitions, 108 changer transitions 7/447 dead transitions. [2023-08-24 08:09:03,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 447 transitions, 6915 flow [2023-08-24 08:09:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:09:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:09:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1365 transitions. [2023-08-24 08:09:03,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2023-08-24 08:09:03,094 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1365 transitions. [2023-08-24 08:09:03,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1365 transitions. [2023-08-24 08:09:03,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:09:03,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1365 transitions. [2023-08-24 08:09:03,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 54.6) internal successors, (1365), 25 states have internal predecessors, (1365), 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 08:09:03,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 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 08:09:03,099 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 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 08:09:03,099 INFO L175 Difference]: Start difference. First operand has 343 places, 406 transitions, 5631 flow. Second operand 25 states and 1365 transitions. [2023-08-24 08:09:03,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 447 transitions, 6915 flow [2023-08-24 08:09:03,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 6848 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-08-24 08:09:03,333 INFO L231 Difference]: Finished difference. Result has 346 places, 409 transitions, 5901 flow [2023-08-24 08:09:03,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5901, PETRI_PLACES=346, PETRI_TRANSITIONS=409} [2023-08-24 08:09:03,334 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 326 predicate places. [2023-08-24 08:09:03,334 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 409 transitions, 5901 flow [2023-08-24 08:09:03,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.8) internal successors, (1036), 20 states have internal predecessors, (1036), 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 08:09:03,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:09:03,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:09:03,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 08:09:03,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:09:03,539 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:09:03,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:09:03,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1798636087, now seen corresponding path program 23 times [2023-08-24 08:09:03,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:09:03,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662545014] [2023-08-24 08:09:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:09:03,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:09:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:09:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:04,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:09:04,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662545014] [2023-08-24 08:09:04,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662545014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:09:04,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090584789] [2023-08-24 08:09:04,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:09:04,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:09:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:09:04,141 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:09:04,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 08:09:04,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:09:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:09:04,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 08:09:04,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:09:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:04,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:09:07,852 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse0 (div (+ (mod c_~x_1~0 4294967296) (- 4294967294)) 4294967296)) (.cse3 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse4 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296))) (and (or (< .cse0 0) (forall ((v_z_349 Int)) (or (< .cse1 v_z_349) (let ((.cse2 (* 2 v_z_349))) (< (+ .cse2 c_~x_2~0 .cse3 4294967293) (+ (* (div (+ .cse2 c_~x_2~0) 4294967296) 4294967296) c_~x_1~0))) (<= v_z_349 .cse4)))) (forall ((v_z_349 Int)) (or (< .cse1 v_z_349) (let ((.cse5 (* 2 v_z_349))) (< (+ (* (div (+ .cse5 c_~x_2~0) 4294967296) 4294967296) c_~x_1~0) (+ .cse5 c_~x_2~0 4294967295 .cse3))) (<= v_z_349 .cse4))) (forall ((v_z_349 Int)) (or (< .cse1 v_z_349) (let ((.cse6 (* 2 v_z_349))) (< (+ .cse6 c_~x_2~0 .cse3) (+ (* (div (+ .cse6 c_~x_2~0) 4294967296) 4294967296) c_~x_1~0 3))) (<= v_z_349 .cse4))) (forall ((v_z_349 Int)) (or (< .cse1 v_z_349) (let ((.cse7 (* 2 v_z_349))) (< (+ (* (div (+ .cse7 c_~x_2~0) 4294967296) 4294967296) c_~x_1~0) (+ (* .cse0 4294967296) .cse7 c_~x_2~0 4294967295 .cse3))) (<= v_z_349 .cse4))))) is different from false [2023-08-24 08:09:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 08:09:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090584789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:09:08,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:09:08,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-24 08:09:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005544700] [2023-08-24 08:09:08,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:09:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:09:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:09:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:09:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=339, Unknown=1, NotChecked=38, Total=462 [2023-08-24 08:09:08,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:09:08,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 409 transitions, 5901 flow. Second operand has 22 states, 22 states have (on average 51.81818181818182) internal successors, (1140), 22 states have internal predecessors, (1140), 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 08:09:08,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:09:08,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:09:08,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:09:15,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:09:17,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:09:20,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:09:21,335 INFO L124 PetriNetUnfolderBase]: 977/1898 cut-off events. [2023-08-24 08:09:21,335 INFO L125 PetriNetUnfolderBase]: For 39187/39187 co-relation queries the response was YES. [2023-08-24 08:09:21,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16313 conditions, 1898 events. 977/1898 cut-off events. For 39187/39187 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12201 event pairs, 78 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 16211. Up to 1489 conditions per place. [2023-08-24 08:09:21,349 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 331 selfloop transitions, 138 changer transitions 17/486 dead transitions. [2023-08-24 08:09:21,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 486 transitions, 7515 flow [2023-08-24 08:09:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 08:09:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 08:09:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1494 transitions. [2023-08-24 08:09:21,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2023-08-24 08:09:21,351 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1494 transitions. [2023-08-24 08:09:21,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1494 transitions. [2023-08-24 08:09:21,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:09:21,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1494 transitions. [2023-08-24 08:09:21,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.333333333333336) internal successors, (1494), 27 states have internal predecessors, (1494), 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 08:09:21,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 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 08:09:21,356 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 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 08:09:21,356 INFO L175 Difference]: Start difference. First operand has 346 places, 409 transitions, 5901 flow. Second operand 27 states and 1494 transitions. [2023-08-24 08:09:21,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 486 transitions, 7515 flow [2023-08-24 08:09:21,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 486 transitions, 7285 flow, removed 49 selfloop flow, removed 21 redundant places. [2023-08-24 08:09:21,536 INFO L231 Difference]: Finished difference. Result has 354 places, 413 transitions, 6118 flow [2023-08-24 08:09:21,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=5666, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6118, PETRI_PLACES=354, PETRI_TRANSITIONS=413} [2023-08-24 08:09:21,536 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2023-08-24 08:09:21,537 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 413 transitions, 6118 flow [2023-08-24 08:09:21,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 51.81818181818182) internal successors, (1140), 22 states have internal predecessors, (1140), 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 08:09:21,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:09:21,537 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:09:21,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 08:09:21,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-24 08:09:21,742 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:09:21,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:09:21,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1090114804, now seen corresponding path program 4 times [2023-08-24 08:09:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:09:21,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696049768] [2023-08-24 08:09:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:09:21,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:09:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:09:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:21,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:09:21,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696049768] [2023-08-24 08:09:21,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696049768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:09:21,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908476393] [2023-08-24 08:09:21,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:09:21,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:09:21,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:09:21,967 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:09:21,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 08:09:22,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:09:22,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:09:22,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 08:09:22,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:09:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:22,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:09:32,784 WARN L234 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 36 DAG size of output: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:09:34,842 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_356 Int) (v_y_356 Int)) (let ((.cse2 (+ (* v_y_356 4294967296) (* 2863311531 v_z_356))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_356))) (or (= .cse0 .cse1) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse2) (< v_z_356 0) (<= 4294967296 v_z_356) (< .cse2 0) (= (+ .cse0 4294967296) .cse1)))) is different from false [2023-08-24 08:09:47,729 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_356 Int) (v_y_356 Int)) (let ((.cse2 (+ (* v_y_356 4294967296) (* 2863311531 v_z_356))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_356))) (or (= .cse0 .cse1) (< v_z_356 0) (< 0 .cse2) (<= 4294967296 v_z_356) (< .cse2 0) (= (+ .cse0 4294967296) .cse1)))) is different from false [2023-08-24 08:09:53,836 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_356 Int) (v_y_356 Int)) (let ((.cse0 (+ (* v_y_356 4294967296) (* 2863311531 v_z_356)))) (or (= (mod c_~x_1~0 4294967296) (+ (mod c_~x_2~0 4294967296) v_z_356)) (< v_z_356 0) (< 0 .cse0) (<= 4294967296 v_z_356) (< .cse0 0)))) is different from false [2023-08-24 08:09:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:57,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908476393] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:09:57,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:09:57,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 17 [2023-08-24 08:09:57,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648960075] [2023-08-24 08:09:57,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:09:57,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:09:57,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:09:57,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:09:57,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=174, Unknown=5, NotChecked=90, Total=342 [2023-08-24 08:09:57,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 140 [2023-08-24 08:09:57,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 413 transitions, 6118 flow. Second operand has 19 states, 19 states have (on average 54.21052631578947) internal successors, (1030), 19 states have internal predecessors, (1030), 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 08:09:57,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:09:57,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 140 [2023-08-24 08:09:57,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:09:59,982 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_z_356 Int) (v_y_356 Int)) (let ((.cse0 (+ (* v_y_356 4294967296) (* 2863311531 v_z_356)))) (or (= (mod c_~x_1~0 4294967296) (+ (mod c_~x_2~0 4294967296) v_z_356)) (< v_z_356 0) (< 0 .cse0) (<= 4294967296 v_z_356) (< .cse0 0)))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-24 08:10:01,998 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (forall ((v_z_356 Int) (v_y_356 Int)) (let ((.cse2 (+ (* v_y_356 4294967296) (* 2863311531 v_z_356))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_356))) (or (= .cse0 .cse1) (< v_z_356 0) (< 0 .cse2) (<= 4294967296 v_z_356) (< .cse2 0) (= (+ .cse0 4294967296) .cse1)))) (= c_~x_1~0 0)) is different from false [2023-08-24 08:10:04,003 WARN L539 Checker$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 08:10:06,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:10:08,053 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0) (forall ((v_z_356 Int) (v_y_356 Int)) (let ((.cse2 (+ (* v_y_356 4294967296) (* 2863311531 v_z_356))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_356))) (or (= .cse0 .cse1) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse2) (< v_z_356 0) (<= 4294967296 v_z_356) (< .cse2 0) (= (+ .cse0 4294967296) .cse1))))) is different from false [2023-08-24 08:10:10,078 WARN L539 Checker$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 08:10:12,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:10:14,632 WARN L839 $PredicateComparison]: unable to prove that (and (or (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (forall ((v_z_356 Int) (v_y_356 Int)) (let ((.cse2 (+ (* v_y_356 4294967296) (* 2863311531 v_z_356))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_356))) (or (= .cse0 .cse1) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse2) (< v_z_356 0) (<= 4294967296 v_z_356) (< .cse2 0) (= (+ .cse0 4294967296) .cse1))))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-08-24 08:10:16,655 WARN L539 Checker$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 08:10:17,593 INFO L124 PetriNetUnfolderBase]: 1015/1970 cut-off events. [2023-08-24 08:10:17,593 INFO L125 PetriNetUnfolderBase]: For 48543/48543 co-relation queries the response was YES. [2023-08-24 08:10:17,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17927 conditions, 1970 events. 1015/1970 cut-off events. For 48543/48543 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 12714 event pairs, 343 based on Foata normal form. 2/1948 useless extension candidates. Maximal degree in co-relation 17822. Up to 1838 conditions per place. [2023-08-24 08:10:17,610 INFO L140 encePairwiseOnDemand]: 131/140 looper letters, 428 selfloop transitions, 37 changer transitions 4/469 dead transitions. [2023-08-24 08:10:17,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 469 transitions, 8182 flow [2023-08-24 08:10:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:10:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:10:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 857 transitions. [2023-08-24 08:10:17,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080952380952381 [2023-08-24 08:10:17,612 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 857 transitions. [2023-08-24 08:10:17,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 857 transitions. [2023-08-24 08:10:17,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:10:17,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 857 transitions. [2023-08-24 08:10:17,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 57.13333333333333) internal successors, (857), 15 states have internal predecessors, (857), 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 08:10:17,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 140.0) internal successors, (2240), 16 states have internal predecessors, (2240), 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 08:10:17,614 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 140.0) internal successors, (2240), 16 states have internal predecessors, (2240), 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 08:10:17,614 INFO L175 Difference]: Start difference. First operand has 354 places, 413 transitions, 6118 flow. Second operand 15 states and 857 transitions. [2023-08-24 08:10:17,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 469 transitions, 8182 flow [2023-08-24 08:10:17,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 469 transitions, 7759 flow, removed 96 selfloop flow, removed 22 redundant places. [2023-08-24 08:10:17,825 INFO L231 Difference]: Finished difference. Result has 350 places, 438 transitions, 6566 flow [2023-08-24 08:10:17,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=5760, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6566, PETRI_PLACES=350, PETRI_TRANSITIONS=438} [2023-08-24 08:10:17,826 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 330 predicate places. [2023-08-24 08:10:17,826 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 438 transitions, 6566 flow [2023-08-24 08:10:17,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.21052631578947) internal successors, (1030), 19 states have internal predecessors, (1030), 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 08:10:17,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:10:17,826 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:10:17,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 08:10:18,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 08:10:18,030 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:10:18,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:10:18,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1036257478, now seen corresponding path program 5 times [2023-08-24 08:10:18,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:10:18,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132450584] [2023-08-24 08:10:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:10:18,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:10:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:10:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:18,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:10:18,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132450584] [2023-08-24 08:10:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132450584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:10:18,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962562972] [2023-08-24 08:10:18,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:10:18,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:10:18,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:10:18,197 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:10:18,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 08:10:18,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:10:18,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:10:18,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 08:10:18,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:10:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:20,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:10:31,677 WARN L234 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 40 DAG size of output: 33 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:10:33,724 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_360 Int) (v_z_360 Int)) (let ((.cse2 (+ (* 2863311531 v_z_360) (* v_y_360 4294967296))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_360))) (or (= .cse0 .cse1) (<= 4294967296 v_z_360) (< .cse2 0) (< v_z_360 0) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse2) (= (+ .cse0 4294967296) .cse1)))) is different from false [2023-08-24 08:10:46,282 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_360 Int) (v_z_360 Int)) (let ((.cse2 (+ (* 2863311531 v_z_360) (* v_y_360 4294967296))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_360))) (or (= .cse0 .cse1) (< 0 .cse2) (<= 4294967296 v_z_360) (< .cse2 0) (< v_z_360 0) (= (+ .cse0 4294967296) .cse1)))) is different from false [2023-08-24 08:11:09,904 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_360 Int) (v_z_360 Int)) (let ((.cse0 (+ (* 2863311531 v_z_360) (* v_y_360 4294967296)))) (or (= (mod c_~x_1~0 4294967296) (+ (mod c_~x_2~0 4294967296) v_z_360)) (< 0 .cse0) (<= 4294967296 v_z_360) (< .cse0 0) (< v_z_360 0)))) is different from false [2023-08-24 08:11:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:09,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962562972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:11:09,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:11:09,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 21 [2023-08-24 08:11:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293496414] [2023-08-24 08:11:09,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:11:09,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:11:09,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:11:09,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:11:09,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=296, Unknown=6, NotChecked=114, Total=506 [2023-08-24 08:11:09,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:11:09,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 438 transitions, 6566 flow. Second operand has 23 states, 23 states have (on average 51.82608695652174) internal successors, (1192), 23 states have internal predecessors, (1192), 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 08:11:09,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:11:09,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:11:09,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:11:11,933 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_y_360 Int) (v_z_360 Int)) (let ((.cse0 (+ (* 2863311531 v_z_360) (* v_y_360 4294967296)))) (or (= (mod c_~x_1~0 4294967296) (+ (mod c_~x_2~0 4294967296) v_z_360)) (< 0 .cse0) (<= 4294967296 v_z_360) (< .cse0 0) (< v_z_360 0)))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-24 08:11:13,949 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_y_360 Int) (v_z_360 Int)) (let ((.cse2 (+ (* 2863311531 v_z_360) (* v_y_360 4294967296))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_360))) (or (= .cse0 .cse1) (< 0 .cse2) (<= 4294967296 v_z_360) (< .cse2 0) (< v_z_360 0) (= (+ .cse0 4294967296) .cse1)))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-24 08:11:15,964 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_y_360 Int) (v_z_360 Int)) (let ((.cse2 (+ (* 2863311531 v_z_360) (* v_y_360 4294967296))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_360))) (or (= .cse0 .cse1) (<= 4294967296 v_z_360) (< .cse2 0) (< v_z_360 0) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse2) (= (+ .cse0 4294967296) .cse1)))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)) is different from false [2023-08-24 08:11:17,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:11:20,074 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (or (forall ((v_y_360 Int) (v_z_360 Int)) (let ((.cse2 (+ (* 2863311531 v_z_360) (* v_y_360 4294967296))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_360))) (or (= .cse0 .cse1) (<= 4294967296 v_z_360) (< .cse2 0) (< v_z_360 0) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse2) (= (+ .cse0 4294967296) .cse1)))) (< (mod (+ c_thread2Thread1of1ForFork1_~i~1 3) 4294967296) (+ (mod c_thread2Thread1of1ForFork1_~i~1 4294967296) 1))) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-08-24 08:11:25,224 INFO L124 PetriNetUnfolderBase]: 1079/2097 cut-off events. [2023-08-24 08:11:25,224 INFO L125 PetriNetUnfolderBase]: For 52677/52677 co-relation queries the response was YES. [2023-08-24 08:11:25,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19581 conditions, 2097 events. 1079/2097 cut-off events. For 52677/52677 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 13761 event pairs, 261 based on Foata normal form. 3/2076 useless extension candidates. Maximal degree in co-relation 19473. Up to 1988 conditions per place. [2023-08-24 08:11:25,243 INFO L140 encePairwiseOnDemand]: 128/140 looper letters, 466 selfloop transitions, 35 changer transitions 13/514 dead transitions. [2023-08-24 08:11:25,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 514 transitions, 8774 flow [2023-08-24 08:11:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 08:11:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 08:11:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1196 transitions. [2023-08-24 08:11:25,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38831168831168833 [2023-08-24 08:11:25,245 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1196 transitions. [2023-08-24 08:11:25,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1196 transitions. [2023-08-24 08:11:25,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:11:25,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1196 transitions. [2023-08-24 08:11:25,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 54.36363636363637) internal successors, (1196), 22 states have internal predecessors, (1196), 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 08:11:25,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 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 08:11:25,249 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 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 08:11:25,249 INFO L175 Difference]: Start difference. First operand has 350 places, 438 transitions, 6566 flow. Second operand 22 states and 1196 transitions. [2023-08-24 08:11:25,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 514 transitions, 8774 flow [2023-08-24 08:11:25,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 514 transitions, 8474 flow, removed 140 selfloop flow, removed 2 redundant places. [2023-08-24 08:11:25,517 INFO L231 Difference]: Finished difference. Result has 382 places, 468 transitions, 7168 flow [2023-08-24 08:11:25,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7168, PETRI_PLACES=382, PETRI_TRANSITIONS=468} [2023-08-24 08:11:25,517 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 362 predicate places. [2023-08-24 08:11:25,517 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 468 transitions, 7168 flow [2023-08-24 08:11:25,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 51.82608695652174) internal successors, (1192), 23 states have internal predecessors, (1192), 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 08:11:25,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:11:25,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:11:25,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 08:11:25,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 08:11:25,718 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:11:25,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:11:25,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1137714909, now seen corresponding path program 24 times [2023-08-24 08:11:25,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:11:25,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222896240] [2023-08-24 08:11:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:11:25,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:11:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:11:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:26,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:11:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222896240] [2023-08-24 08:11:26,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222896240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:11:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944732453] [2023-08-24 08:11:26,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:11:26,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:11:26,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:11:26,276 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:11:26,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 08:11:26,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:11:26,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:11:26,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 08:11:26,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:11:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:27,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:11:30,910 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse6 (mod (+ 2 c_thread2Thread1of1ForFork1_~i~1) 4294967296)) (.cse2 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse4 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse0 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse5 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296))) (and (or (forall ((v_z_384 Int)) (or (<= v_z_384 .cse0) (let ((.cse3 (* 2 v_z_384))) (< (+ c_~x_2~0 (* 4294967296 (div (+ (- 1) .cse1) 4294967296)) 4294967294 .cse2 .cse3) (+ .cse4 (* (div (+ c_~x_2~0 .cse3) 4294967296) 4294967296) c_~x_1~0))) (< .cse5 v_z_384))) (< (div (+ .cse1 .cse6) 4294967296) 1)) (or (< 4294967294 (+ .cse1 .cse4)) (forall ((v_z_384 Int)) (or (<= v_z_384 .cse0) (< (+ (* (div (+ c_~x_2~0 (* 2 v_z_384)) 4294967296) 4294967296) 4294967295 (* (div (+ (- 1) (* (- 1) c_~x_2~0) c_~x_1~0 (* (- 2) v_z_384) .cse6) 4294967296) 4294967296)) (+ .cse1 .cse2)) (< .cse5 v_z_384)))) (forall ((v_z_384 Int)) (or (<= v_z_384 .cse0) (let ((.cse7 (* 2 v_z_384))) (< (+ (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296) c_~x_1~0 .cse6) (+ (* (div (+ .cse4 (- 4294967295)) 4294967296) 4294967296) c_~x_2~0 8589934593 .cse2 .cse7))) (< .cse5 v_z_384))) (forall ((v_z_384 Int)) (or (let ((.cse8 (* 2 v_z_384))) (< (+ c_~x_2~0 .cse2 .cse8) (+ .cse4 (* (div (+ c_~x_2~0 .cse8) 4294967296) 4294967296) c_~x_1~0 2))) (<= v_z_384 .cse0) (< .cse5 v_z_384))))) is different from false [2023-08-24 08:11:33,081 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_1~0 4294967296)) (.cse1 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse3 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296))) (and (forall ((v_z_384 Int)) (or (<= v_z_384 .cse0) (let ((.cse2 (* 2 v_z_384))) (< (+ c_~x_2~0 .cse1 .cse2) (+ (* (div (+ c_~x_2~0 .cse2) 4294967296) 4294967296) c_~x_1~0 3))) (< .cse3 v_z_384))) (or (< (div (+ .cse4 2) 4294967296) 1) (forall ((v_z_384 Int)) (or (let ((.cse5 (* 2 v_z_384))) (< (+ c_~x_2~0 (* 4294967296 (div (+ (- 1) .cse4) 4294967296)) .cse1 .cse5 4294967293) (+ (* (div (+ c_~x_2~0 .cse5) 4294967296) 4294967296) c_~x_1~0))) (<= v_z_384 .cse0) (< .cse3 v_z_384)))) (forall ((v_z_384 Int)) (or (<= v_z_384 .cse0) (< .cse3 v_z_384) (let ((.cse6 (* 2 v_z_384))) (< (+ (* (div (+ c_~x_2~0 .cse6) 4294967296) 4294967296) c_~x_1~0) (+ c_~x_2~0 4294967295 .cse1 .cse6))))) (or (< 4294967293 .cse4) (forall ((v_z_384 Int)) (or (<= v_z_384 .cse0) (< (+ (* (div (+ c_~x_2~0 (* 2 v_z_384)) 4294967296) 4294967296) 4294967295 (* 4294967296 (div (+ (* (- 1) c_~x_2~0) c_~x_1~0 (* (- 2) v_z_384) 1) 4294967296))) (+ .cse4 .cse1)) (< .cse3 v_z_384)))))) is different from false [2023-08-24 08:11:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 08:11:33,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944732453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:11:33,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:11:33,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 08:11:33,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379912926] [2023-08-24 08:11:33,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:11:33,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:11:33,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:11:33,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:11:33,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=241, Unknown=2, NotChecked=66, Total=380 [2023-08-24 08:11:33,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:11:33,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 468 transitions, 7168 flow. Second operand has 20 states, 20 states have (on average 51.9) internal successors, (1038), 20 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 08:11:33,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:11:33,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:11:33,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:11:36,400 INFO L124 PetriNetUnfolderBase]: 1107/2150 cut-off events. [2023-08-24 08:11:36,400 INFO L125 PetriNetUnfolderBase]: For 58182/58182 co-relation queries the response was YES. [2023-08-24 08:11:36,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20491 conditions, 2150 events. 1107/2150 cut-off events. For 58182/58182 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 14199 event pairs, 218 based on Foata normal form. 2/2128 useless extension candidates. Maximal degree in co-relation 20369. Up to 1890 conditions per place. [2023-08-24 08:11:36,420 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 403 selfloop transitions, 108 changer transitions 12/523 dead transitions. [2023-08-24 08:11:36,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 523 transitions, 8988 flow [2023-08-24 08:11:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 08:11:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 08:11:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1100 transitions. [2023-08-24 08:11:36,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2023-08-24 08:11:36,422 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1100 transitions. [2023-08-24 08:11:36,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1100 transitions. [2023-08-24 08:11:36,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:11:36,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1100 transitions. [2023-08-24 08:11:36,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.0) internal successors, (1100), 20 states have internal predecessors, (1100), 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 08:11:36,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 140.0) internal successors, (2940), 21 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:11:36,425 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 140.0) internal successors, (2940), 21 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:11:36,425 INFO L175 Difference]: Start difference. First operand has 382 places, 468 transitions, 7168 flow. Second operand 20 states and 1100 transitions. [2023-08-24 08:11:36,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 523 transitions, 8988 flow [2023-08-24 08:11:36,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 523 transitions, 8875 flow, removed 54 selfloop flow, removed 4 redundant places. [2023-08-24 08:11:36,683 INFO L231 Difference]: Finished difference. Result has 403 places, 478 transitions, 7631 flow [2023-08-24 08:11:36,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7631, PETRI_PLACES=403, PETRI_TRANSITIONS=478} [2023-08-24 08:11:36,684 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-08-24 08:11:36,684 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 478 transitions, 7631 flow [2023-08-24 08:11:36,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.9) internal successors, (1038), 20 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 08:11:36,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:11:36,685 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:11:36,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 08:11:36,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:11:36,885 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:11:36,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:11:36,886 INFO L85 PathProgramCache]: Analyzing trace with hash 405095846, now seen corresponding path program 6 times [2023-08-24 08:11:36,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:11:36,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695384820] [2023-08-24 08:11:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:11:36,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:11:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:11:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:37,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:11:37,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695384820] [2023-08-24 08:11:37,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695384820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:11:37,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26602385] [2023-08-24 08:11:37,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:11:37,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:11:37,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:11:37,101 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:11:37,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 08:11:37,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:11:37,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:11:37,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 08:11:37,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:11:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:37,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:11:54,539 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse3 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_389 Int) (v_y_389 Int)) (let ((.cse2 (+ .cse3 v_z_389)) (.cse0 (+ (* v_y_389 4294967296) (* 2863311531 v_z_389)))) (or (< 0 .cse0) (< v_z_389 0) (= .cse1 .cse2) (= (+ .cse1 4294967296) .cse2) (< .cse0 0) (<= 4294967296 v_z_389)))) (forall ((v_z_389 Int) (v_y_389 Int)) (let ((.cse5 (+ .cse3 v_z_389)) (.cse4 (+ (* v_y_389 4294967296) (* 2863311531 v_z_389)))) (or (< 0 .cse4) (<= 4294967296 .cse5) (< v_z_389 0) (= .cse1 .cse5) (< .cse4 0)))))) is different from false [2023-08-24 08:12:29,754 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_389 Int) (v_y_389 Int)) (let ((.cse0 (+ (* v_y_389 4294967296) (* 2863311531 v_z_389)))) (or (< 0 .cse0) (< v_z_389 0) (= .cse1 (+ .cse2 v_z_389)) (< .cse0 0) (<= 4294967296 v_z_389)))) (forall ((v_z_389 Int) (v_y_389 Int)) (let ((.cse4 (+ .cse2 v_z_389)) (.cse3 (+ (* v_y_389 4294967296) (* 2863311531 v_z_389)))) (or (< 0 .cse3) (<= 4294967296 .cse4) (< v_z_389 0) (= .cse1 .cse4) (< .cse3 0)))))) is different from false [2023-08-24 08:12:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-24 08:12:37,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26602385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:12:37,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:12:37,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 16 [2023-08-24 08:12:37,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852631792] [2023-08-24 08:12:37,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:12:37,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:12:37,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:12:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:12:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=175, Unknown=2, NotChecked=58, Total=306 [2023-08-24 08:12:37,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 140 [2023-08-24 08:12:37,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 478 transitions, 7631 flow. Second operand has 18 states, 18 states have (on average 60.111111111111114) internal successors, (1082), 18 states have internal predecessors, (1082), 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 08:12:37,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:12:37,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 140 [2023-08-24 08:12:37,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:12:39,913 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (= c_~x_2~0 0) (= c_~x_1~0 0) (forall ((v_z_389 Int) (v_y_389 Int)) (let ((.cse0 (+ (* v_y_389 4294967296) (* 2863311531 v_z_389)))) (or (< 0 .cse0) (< v_z_389 0) (= .cse1 (+ .cse2 v_z_389)) (< .cse0 0) (<= 4294967296 v_z_389)))) (forall ((v_z_389 Int) (v_y_389 Int)) (let ((.cse4 (+ .cse2 v_z_389)) (.cse3 (+ (* v_y_389 4294967296) (* 2863311531 v_z_389)))) (or (< 0 .cse3) (<= 4294967296 .cse4) (< v_z_389 0) (= .cse1 .cse4) (< .cse3 0)))))) is different from false [2023-08-24 08:12:41,930 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse3 (mod c_~x_2~0 4294967296))) (and (= c_~x_2~0 0) (forall ((v_z_389 Int) (v_y_389 Int)) (let ((.cse2 (+ .cse3 v_z_389)) (.cse0 (+ (* v_y_389 4294967296) (* 2863311531 v_z_389)))) (or (< 0 .cse0) (< v_z_389 0) (= .cse1 .cse2) (= (+ .cse1 4294967296) .cse2) (< .cse0 0) (<= 4294967296 v_z_389)))) (= c_~x_1~0 0) (forall ((v_z_389 Int) (v_y_389 Int)) (let ((.cse5 (+ .cse3 v_z_389)) (.cse4 (+ (* v_y_389 4294967296) (* 2863311531 v_z_389)))) (or (< 0 .cse4) (<= 4294967296 .cse5) (< v_z_389 0) (= .cse1 .cse5) (< .cse4 0)))))) is different from false [2023-08-24 08:12:42,971 INFO L124 PetriNetUnfolderBase]: 1178/2302 cut-off events. [2023-08-24 08:12:42,971 INFO L125 PetriNetUnfolderBase]: For 79894/79904 co-relation queries the response was YES. [2023-08-24 08:12:42,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23325 conditions, 2302 events. 1178/2302 cut-off events. For 79894/79904 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 15594 event pairs, 267 based on Foata normal form. 10/2276 useless extension candidates. Maximal degree in co-relation 23196. Up to 1889 conditions per place. [2023-08-24 08:12:42,992 INFO L140 encePairwiseOnDemand]: 133/140 looper letters, 442 selfloop transitions, 69 changer transitions 26/551 dead transitions. [2023-08-24 08:12:42,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 551 transitions, 10222 flow [2023-08-24 08:12:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:12:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:12:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 957 transitions. [2023-08-24 08:12:42,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45571428571428574 [2023-08-24 08:12:42,994 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 957 transitions. [2023-08-24 08:12:42,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 957 transitions. [2023-08-24 08:12:42,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:12:42,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 957 transitions. [2023-08-24 08:12:42,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 63.8) internal successors, (957), 15 states have internal predecessors, (957), 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 08:12:42,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 140.0) internal successors, (2240), 16 states have internal predecessors, (2240), 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 08:12:42,997 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 140.0) internal successors, (2240), 16 states have internal predecessors, (2240), 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 08:12:42,997 INFO L175 Difference]: Start difference. First operand has 403 places, 478 transitions, 7631 flow. Second operand 15 states and 957 transitions. [2023-08-24 08:12:42,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 551 transitions, 10222 flow [2023-08-24 08:12:43,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 551 transitions, 9943 flow, removed 89 selfloop flow, removed 11 redundant places. [2023-08-24 08:12:43,322 INFO L231 Difference]: Finished difference. Result has 409 places, 482 transitions, 7839 flow [2023-08-24 08:12:43,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=7370, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7839, PETRI_PLACES=409, PETRI_TRANSITIONS=482} [2023-08-24 08:12:43,323 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 389 predicate places. [2023-08-24 08:12:43,323 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 482 transitions, 7839 flow [2023-08-24 08:12:43,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.111111111111114) internal successors, (1082), 18 states have internal predecessors, (1082), 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 08:12:43,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:12:43,324 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:12:43,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 08:12:43,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 08:12:43,526 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:12:43,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:12:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1000531312, now seen corresponding path program 7 times [2023-08-24 08:12:43,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:12:43,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637232071] [2023-08-24 08:12:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:12:43,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:12:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:12:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:12:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:12:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637232071] [2023-08-24 08:12:43,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637232071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:12:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732924793] [2023-08-24 08:12:43,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:12:43,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:12:43,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:12:43,727 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:12:43,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 08:12:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:12:43,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 08:12:43,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:12:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:12:43,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:13:11,389 WARN L234 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 29 DAG size of output: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:13:15,480 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_393 Int) (v_z_393 Int)) (let ((.cse0 (+ (* 2863311531 v_z_393) (* v_y_393 4294967296)))) (or (= (mod c_~x_1~0 4294967296) (+ (mod c_~x_2~0 4294967296) v_z_393)) (< v_z_393 0) (< .cse0 0) (< 0 .cse0) (<= 4294967296 v_z_393)))) is different from false [2023-08-24 08:13:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:13:23,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732924793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:13:23,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:13:23,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-08-24 08:13:23,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009081954] [2023-08-24 08:13:23,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:13:23,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:13:23,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:13:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:13:23,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=195, Unknown=6, NotChecked=30, Total=306 [2023-08-24 08:13:23,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 140 [2023-08-24 08:13:23,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 482 transitions, 7839 flow. Second operand has 18 states, 18 states have (on average 54.27777777777778) internal successors, (977), 18 states have internal predecessors, (977), 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 08:13:23,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:13:23,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 140 [2023-08-24 08:13:23,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:13:25,586 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 08:13:27,620 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_y_393 Int) (v_z_393 Int)) (let ((.cse0 (+ (* 2863311531 v_z_393) (* v_y_393 4294967296)))) (or (= (mod c_~x_1~0 4294967296) (+ (mod c_~x_2~0 4294967296) v_z_393)) (< v_z_393 0) (< .cse0 0) (< 0 .cse0) (<= 4294967296 v_z_393)))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-24 08:13:29,712 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0) (or (forall ((v_y_393 Int) (v_z_393 Int)) (let ((.cse0 (+ (* 2863311531 v_z_393) (* v_y_393 4294967296)))) (or (= (mod c_~x_1~0 4294967296) (+ (mod c_~x_2~0 4294967296) v_z_393)) (< v_z_393 0) (< .cse0 0) (< 0 .cse0) (<= 4294967296 v_z_393)))) (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)))) is different from false [2023-08-24 08:13:31,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:13:36,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:13:38,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:13:40,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:04,803 WARN L234 SmtUtils]: Spent 20.25s on a formula simplification. DAG size of input: 45 DAG size of output: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:14:06,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:12,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:15,018 WARN L539 Checker$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 08:14:17,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:19,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:25,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:27,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:29,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:31,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:33,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:35,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:37,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:39,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:41,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:43,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:45,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:48,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:50,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:52,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:54,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:56,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:14:58,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:15:00,290 WARN L539 Checker$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 08:15:02,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:15:04,905 WARN L539 Checker$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 08:15:06,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:15:09,059 WARN L539 Checker$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 08:15:11,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:15:13,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:15:13,349 INFO L124 PetriNetUnfolderBase]: 1257/2458 cut-off events. [2023-08-24 08:15:13,350 INFO L125 PetriNetUnfolderBase]: For 102455/102455 co-relation queries the response was YES. [2023-08-24 08:15:13,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26273 conditions, 2458 events. 1257/2458 cut-off events. For 102455/102455 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 16830 event pairs, 256 based on Foata normal form. 4/2440 useless extension candidates. Maximal degree in co-relation 26141. Up to 1984 conditions per place. [2023-08-24 08:15:13,377 INFO L140 encePairwiseOnDemand]: 132/140 looper letters, 434 selfloop transitions, 120 changer transitions 5/559 dead transitions. [2023-08-24 08:15:13,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 559 transitions, 10717 flow [2023-08-24 08:15:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 08:15:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 08:15:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1149 transitions. [2023-08-24 08:15:13,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41035714285714286 [2023-08-24 08:15:13,379 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1149 transitions. [2023-08-24 08:15:13,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1149 transitions. [2023-08-24 08:15:13,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:15:13,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1149 transitions. [2023-08-24 08:15:13,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.45) internal successors, (1149), 20 states have internal predecessors, (1149), 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 08:15:13,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 140.0) internal successors, (2940), 21 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:15:13,382 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 140.0) internal successors, (2940), 21 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:15:13,382 INFO L175 Difference]: Start difference. First operand has 409 places, 482 transitions, 7839 flow. Second operand 20 states and 1149 transitions. [2023-08-24 08:15:13,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 559 transitions, 10717 flow [2023-08-24 08:15:13,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 559 transitions, 10632 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-24 08:15:13,931 INFO L231 Difference]: Finished difference. Result has 426 places, 508 transitions, 9028 flow [2023-08-24 08:15:13,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9028, PETRI_PLACES=426, PETRI_TRANSITIONS=508} [2023-08-24 08:15:13,932 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 406 predicate places. [2023-08-24 08:15:13,932 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 508 transitions, 9028 flow [2023-08-24 08:15:13,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.27777777777778) internal successors, (977), 18 states have internal predecessors, (977), 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 08:15:13,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:15:13,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:15:13,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 08:15:14,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 08:15:14,134 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:15:14,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:15:14,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1620295055, now seen corresponding path program 25 times [2023-08-24 08:15:14,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:15:14,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735893719] [2023-08-24 08:15:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:15:14,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:15:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:15:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:15:14,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:15:14,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735893719] [2023-08-24 08:15:14,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735893719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:15:14,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085138695] [2023-08-24 08:15:14,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:15:14,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:15:14,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:15:14,665 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:15:14,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 08:15:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:15:14,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 08:15:14,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:15:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:15:15,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:15:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:15:22,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085138695] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:15:22,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:15:22,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 08:15:22,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453220283] [2023-08-24 08:15:22,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:15:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:15:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:15:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:15:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=359, Unknown=2, NotChecked=0, Total=462 [2023-08-24 08:15:22,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 140 [2023-08-24 08:15:22,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 508 transitions, 9028 flow. Second operand has 22 states, 22 states have (on average 51.68181818181818) internal successors, (1137), 22 states have internal predecessors, (1137), 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 08:15:22,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:15:22,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 140 [2023-08-24 08:15:22,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:15:29,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:15:33,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:15:43,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 08:15:45,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2023-08-24 08:15:45,819 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 08:15:45,825 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 08:15:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 08:15:45,838 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 08:15:45,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 08:15:46,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 08:15:46,047 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 50/140 universal loopers) in iteration 40,while PetriNetUnfolder was constructing finite prefix that currently has 32352 conditions, 2625 events (1438/2624 cut-off events. For 153751/153751 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 18428 event pairs, 201 based on Foata normal form. 0/2723 useless extension candidates. Maximal degree in co-relation 32211. Up to 1702 conditions per place.). [2023-08-24 08:15:46,048 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 08:15:46,048 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 08:15:46,049 INFO L445 BasicCegarLoop]: Path program histogram: [25, 7, 7, 1] [2023-08-24 08:15:46,051 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 08:15:46,051 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 08:15:46,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 08:15:46 BasicIcfg [2023-08-24 08:15:46,052 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 08:15:46,053 INFO L158 Benchmark]: Toolchain (without parser) took 848395.20ms. Allocated memory was 390.1MB in the beginning and 622.9MB in the end (delta: 232.8MB). Free memory was 366.7MB in the beginning and 257.7MB in the end (delta: 109.1MB). Peak memory consumption was 397.9MB. Max. memory is 16.0GB. [2023-08-24 08:15:46,053 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 390.1MB. Free memory was 366.9MB in the beginning and 366.8MB in the end (delta: 77.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 08:15:46,053 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.83ms. Allocated memory is still 390.1MB. Free memory was 366.4MB in the beginning and 355.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 08:15:46,053 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.74ms. Allocated memory is still 390.1MB. Free memory was 355.7MB in the beginning and 354.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:15:46,053 INFO L158 Benchmark]: Boogie Preprocessor took 30.51ms. Allocated memory is still 390.1MB. Free memory was 354.0MB in the beginning and 353.1MB in the end (delta: 973.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:15:46,053 INFO L158 Benchmark]: RCFGBuilder took 354.24ms. Allocated memory is still 390.1MB. Free memory was 352.7MB in the beginning and 341.0MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 08:15:46,054 INFO L158 Benchmark]: TraceAbstraction took 847740.52ms. Allocated memory was 390.1MB in the beginning and 622.9MB in the end (delta: 232.8MB). Free memory was 340.1MB in the beginning and 257.7MB in the end (delta: 82.4MB). Peak memory consumption was 370.7MB. Max. memory is 16.0GB. [2023-08-24 08:15:46,055 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 390.1MB. Free memory was 366.9MB in the beginning and 366.8MB in the end (delta: 77.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 232.83ms. Allocated memory is still 390.1MB. Free memory was 366.4MB in the beginning and 355.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.74ms. Allocated memory is still 390.1MB. Free memory was 355.7MB in the beginning and 354.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.51ms. Allocated memory is still 390.1MB. Free memory was 354.0MB in the beginning and 353.1MB in the end (delta: 973.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 354.24ms. Allocated memory is still 390.1MB. Free memory was 352.7MB in the beginning and 341.0MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 847740.52ms. Allocated memory was 390.1MB in the beginning and 622.9MB in the end (delta: 232.8MB). Free memory was 340.1MB in the beginning and 257.7MB in the end (delta: 82.4MB). Peak memory consumption was 370.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 71 PlacesBefore, 20 PlacesAfterwards, 69 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 61 TotalNumberOfCompositions, 527 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 527, independent: 527, independent conditional: 0, independent unconditional: 527, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 296, independent: 296, independent conditional: 0, independent unconditional: 296, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 527, independent: 231, independent conditional: 0, independent unconditional: 231, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 296, unknown conditional: 0, unknown unconditional: 296] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 50/140 universal loopers) in iteration 40,while PetriNetUnfolder was constructing finite prefix that currently has 32352 conditions, 2625 events (1438/2624 cut-off events. For 153751/153751 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 18428 event pairs, 201 based on Foata normal form. 0/2723 useless extension candidates. Maximal degree in co-relation 32211. Up to 1702 conditions per place.). - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 50/140 universal loopers) in iteration 40,while PetriNetUnfolder was constructing finite prefix that currently has 32352 conditions, 2625 events (1438/2624 cut-off events. For 153751/153751 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 18428 event pairs, 201 based on Foata normal form. 0/2723 useless extension candidates. Maximal degree in co-relation 32211. Up to 1702 conditions per place.). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 50/140 universal loopers) in iteration 40,while PetriNetUnfolder was constructing finite prefix that currently has 32352 conditions, 2625 events (1438/2624 cut-off events. For 153751/153751 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 18428 event pairs, 201 based on Foata normal form. 0/2723 useless extension candidates. Maximal degree in co-relation 32211. Up to 1702 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 97 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 847.6s, OverallIterations: 40, TraceHistogramMax: 3, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 432.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 101 mSolverCounterUnknown, 2037 SdHoareTripleChecker+Valid, 257.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2037 mSDsluCounter, 641 SdHoareTripleChecker+Invalid, 253.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2416 IncrementalHoareTripleChecker+Unchecked, 507 mSDsCounter, 656 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16614 IncrementalHoareTripleChecker+Invalid, 19787 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 656 mSolverCounterUnsat, 134 mSDtfsCounter, 16614 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1667 GetRequests, 678 SyntacticMatches, 81 SemanticMatches, 908 ConstructedPredicates, 32 IntricatePredicates, 0 DeprecatedPredicates, 6805 ImplicationChecksByTransitivity, 294.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9028occurred in iteration=39, InterpolantAutomatonStates: 724, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 400.3s InterpolantComputationTime, 1199 NumberOfCodeBlocks, 1199 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 1674 ConstructedInterpolants, 66 QuantifiedInterpolants, 47633 SizeOfPredicates, 148 NumberOfNonLiveVariables, 4564 ConjunctsInSsa, 916 ConjunctsInUnsatCore, 118 InterpolantComputations, 1 PerfectInterpolantSequences, 3/345 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown